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restic/vendor/golang.org/x/text/message/fmt_test.go
Alexander Neumann 2b39f9f4b2 Update dependencies 
Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.
2018-01-23 19:40:42 +01:00

1871 lines
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package message
import (
"bytes"
"fmt"
"io"
"math"
"reflect"
"runtime"
"strings"
"testing"
"time"
"golang.org/x/text/language"
)
type (
renamedBool bool
renamedInt int
renamedInt8 int8
renamedInt16 int16
renamedInt32 int32
renamedInt64 int64
renamedUint uint
renamedUint8 uint8
renamedUint16 uint16
renamedUint32 uint32
renamedUint64 uint64
renamedUintptr uintptr
renamedString string
renamedBytes []byte
renamedFloat32 float32
renamedFloat64 float64
renamedComplex64 complex64
renamedComplex128 complex128
)
func TestFmtInterface(t *testing.T) {
p := NewPrinter(language.Und)
var i1 interface{}
i1 = "abc"
s := p.Sprintf("%s", i1)
if s != "abc" {
t.Errorf(`Sprintf("%%s", empty("abc")) = %q want %q`, s, "abc")
}
}
var (
NaN = math.NaN()
posInf = math.Inf(1)
negInf = math.Inf(-1)
intVar = 0
array = [5]int{1, 2, 3, 4, 5}
iarray = [4]interface{}{1, "hello", 2.5, nil}
slice = array[:]
islice = iarray[:]
)
type A struct {
i int
j uint
s string
x []int
}
type I int
func (i I) String() string {
p := NewPrinter(language.Und)
return p.Sprintf("<%d>", int(i))
}
type B struct {
I I
j int
}
type C struct {
i int
B
}
type F int
func (f F) Format(s fmt.State, c rune) {
p := NewPrinter(language.Und)
p.Fprintf(s, "<%c=F(%d)>", c, int(f))
}
type G int
func (g G) GoString() string {
p := NewPrinter(language.Und)
return p.Sprintf("GoString(%d)", int(g))
}
type S struct {
F F // a struct field that Formats
G G // a struct field that GoStrings
}
type SI struct {
I interface{}
}
// P is a type with a String method with pointer receiver for testing %p.
type P int
var pValue P
func (p *P) String() string {
return "String(p)"
}
var barray = [5]renamedUint8{1, 2, 3, 4, 5}
var bslice = barray[:]
type byteStringer byte
func (byteStringer) String() string {
return "X"
}
var byteStringerSlice = []byteStringer{'h', 'e', 'l', 'l', 'o'}
type byteFormatter byte
func (byteFormatter) Format(f fmt.State, _ rune) {
p := NewPrinter(language.Und)
p.Fprint(f, "X")
}
var byteFormatterSlice = []byteFormatter{'h', 'e', 'l', 'l', 'o'}
var fmtTests = []struct {
fmt string
val interface{}
out string
}{
// The behavior of the following tests differs from that of the fmt package.
// Unlike with the fmt package, it is okay to have extra arguments for
// strings without format parameters. This is because it is impossible to
// distinguish between reordered or ordered format strings in this case.
// (For reordered format strings it is okay to not use arguments.)
{"", nil, ""},
{"", 2, ""},
{"no args", "hello", "no args"},
{"%017091901790959340919092959340919017929593813360", 0, "%!(NOVERB)"},
{"%184467440737095516170v", 0, "%!(NOVERB)"},
// Extra argument errors should format without flags set.
{"%010.2", "12345", "%!(NOVERB)"},
// Some key other differences, asides from localized values:
// - NaN values should not use affixes; so no signs (CLDR requirement)
// - Infinity uses patterns, so signs may be different (CLDR requirement)
// - The # flag is used to disable localization.
// All following tests are analogous to those of the fmt package, but with
// localized numbers when appropriate.
{"%d", 12345, "12,345"},
{"%v", 12345, "12,345"},
{"%t", true, "true"},
// basic string
{"%s", "abc", "abc"},
{"%q", "abc", `"abc"`},
{"%x", "abc", "616263"},
{"%x", "\xff\xf0\x0f\xff", "fff00fff"},
{"%X", "\xff\xf0\x0f\xff", "FFF00FFF"},
{"%x", "", ""},
{"% x", "", ""},
{"%#x", "", ""},
{"%# x", "", ""},
{"%x", "xyz", "78797a"},
{"%X", "xyz", "78797A"},
{"% x", "xyz", "78 79 7a"},
{"% X", "xyz", "78 79 7A"},
{"%#x", "xyz", "0x78797a"},
{"%#X", "xyz", "0X78797A"},
{"%# x", "xyz", "0x78 0x79 0x7a"},
{"%# X", "xyz", "0X78 0X79 0X7A"},
// basic bytes
{"%s", []byte("abc"), "abc"},
{"%s", [3]byte{'a', 'b', 'c'}, "abc"},
{"%s", &[3]byte{'a', 'b', 'c'}, "&abc"},
{"%q", []byte("abc"), `"abc"`},
{"%x", []byte("abc"), "616263"},
{"%x", []byte("\xff\xf0\x0f\xff"), "fff00fff"},
{"%X", []byte("\xff\xf0\x0f\xff"), "FFF00FFF"},
{"%x", []byte(""), ""},
{"% x", []byte(""), ""},
{"%#x", []byte(""), ""},
{"%# x", []byte(""), ""},
{"%x", []byte("xyz"), "78797a"},
{"%X", []byte("xyz"), "78797A"},
{"% x", []byte("xyz"), "78 79 7a"},
{"% X", []byte("xyz"), "78 79 7A"},
{"%#x", []byte("xyz"), "0x78797a"},
{"%#X", []byte("xyz"), "0X78797A"},
{"%# x", []byte("xyz"), "0x78 0x79 0x7a"},
{"%# X", []byte("xyz"), "0X78 0X79 0X7A"},
// escaped strings
{"%q", "", `""`},
{"%#q", "", "``"},
{"%q", "\"", `"\""`},
{"%#q", "\"", "`\"`"},
{"%q", "`", `"` + "`" + `"`},
{"%#q", "`", `"` + "`" + `"`},
{"%q", "\n", `"\n"`},
{"%#q", "\n", `"\n"`},
{"%q", `\n`, `"\\n"`},
{"%#q", `\n`, "`\\n`"},
{"%q", "abc", `"abc"`},
{"%#q", "abc", "`abc`"},
{"%q", "日本語", `"日本語"`},
{"%+q", "日本語", `"\u65e5\u672c\u8a9e"`},
{"%#q", "日本語", "`日本語`"},
{"%#+q", "日本語", "`日本語`"},
{"%q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
{"%+q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
{"%#q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
{"%#+q", "\a\b\f\n\r\t\v\"\\", `"\a\b\f\n\r\t\v\"\\"`},
{"%q", "☺", `"☺"`},
{"% q", "☺", `"☺"`}, // The space modifier should have no effect.
{"%+q", "☺", `"\u263a"`},
{"%#q", "☺", "`☺`"},
{"%#+q", "☺", "`☺`"},
{"%10q", "⌘", ` "⌘"`},
{"%+10q", "⌘", ` "\u2318"`},
{"%-10q", "⌘", `"⌘" `},
{"%+-10q", "⌘", `"\u2318" `},
{"%010q", "⌘", `0000000"⌘"`},
{"%+010q", "⌘", `00"\u2318"`},
{"%-010q", "⌘", `"⌘" `}, // 0 has no effect when - is present.
{"%+-010q", "⌘", `"\u2318" `},
{"%#8q", "\n", ` "\n"`},
{"%#+8q", "\r", ` "\r"`},
{"%#-8q", "\t", "` ` "},
{"%#+-8q", "\b", `"\b" `},
{"%q", "abc\xffdef", `"abc\xffdef"`},
{"%+q", "abc\xffdef", `"abc\xffdef"`},
{"%#q", "abc\xffdef", `"abc\xffdef"`},
{"%#+q", "abc\xffdef", `"abc\xffdef"`},
// Runes that are not printable.
{"%q", "\U0010ffff", `"\U0010ffff"`},
{"%+q", "\U0010ffff", `"\U0010ffff"`},
{"%#q", "\U0010ffff", "`􏿿`"},
{"%#+q", "\U0010ffff", "`􏿿`"},
// Runes that are not valid.
{"%q", string(0x110000), `"�"`},
{"%+q", string(0x110000), `"\ufffd"`},
{"%#q", string(0x110000), "`�`"},
{"%#+q", string(0x110000), "`�`"},
// characters
{"%c", uint('x'), "x"},
{"%c", 0xe4, "ä"},
{"%c", 0x672c, "本"},
{"%c", '日', "日"},
{"%.0c", '⌘', "⌘"}, // Specifying precision should have no effect.
{"%3c", '⌘', " ⌘"},
{"%-3c", '⌘', "⌘ "},
// Runes that are not printable.
{"%c", '\U00000e00', "\u0e00"},
{"%c", '\U0010ffff', "\U0010ffff"},
// Runes that are not valid.
{"%c", -1, "�"},
{"%c", 0xDC80, "�"},
{"%c", rune(0x110000), "�"},
{"%c", int64(0xFFFFFFFFF), "�"},
{"%c", uint64(0xFFFFFFFFF), "�"},
// escaped characters
{"%q", uint(0), `'\x00'`},
{"%+q", uint(0), `'\x00'`},
{"%q", '"', `'"'`},
{"%+q", '"', `'"'`},
{"%q", '\'', `'\''`},
{"%+q", '\'', `'\''`},
{"%q", '`', "'`'"},
{"%+q", '`', "'`'"},
{"%q", 'x', `'x'`},
{"%+q", 'x', `'x'`},
{"%q", 'ÿ', `'ÿ'`},
{"%+q", 'ÿ', `'\u00ff'`},
{"%q", '\n', `'\n'`},
{"%+q", '\n', `'\n'`},
{"%q", '☺', `'☺'`},
{"%+q", '☺', `'\u263a'`},
{"% q", '☺', `'☺'`}, // The space modifier should have no effect.
{"%.0q", '☺', `'☺'`}, // Specifying precision should have no effect.
{"%10q", '⌘', ` '⌘'`},
{"%+10q", '⌘', ` '\u2318'`},
{"%-10q", '⌘', `'⌘' `},
{"%+-10q", '⌘', `'\u2318' `},
{"%010q", '⌘', `0000000'⌘'`},
{"%+010q", '⌘', `00'\u2318'`},
{"%-010q", '⌘', `'⌘' `}, // 0 has no effect when - is present.
{"%+-010q", '⌘', `'\u2318' `},
// Runes that are not printable.
{"%q", '\U00000e00', `'\u0e00'`},
{"%q", '\U0010ffff', `'\U0010ffff'`},
// Runes that are not valid.
{"%q", int32(-1), "%!q(int32=-1)"},
{"%q", 0xDC80, `'�'`},
{"%q", rune(0x110000), "%!q(int32=1,114,112)"},
{"%q", int64(0xFFFFFFFFF), "%!q(int64=68,719,476,735)"},
{"%q", uint64(0xFFFFFFFFF), "%!q(uint64=68,719,476,735)"},
// width
{"%5s", "abc", " abc"},
{"%2s", "\u263a", " ☺"},
{"%-5s", "abc", "abc "},
{"%-8q", "abc", `"abc" `},
{"%05s", "abc", "00abc"},
{"%08q", "abc", `000"abc"`},
{"%5s", "abcdefghijklmnopqrstuvwxyz", "abcdefghijklmnopqrstuvwxyz"},
{"%.5s", "abcdefghijklmnopqrstuvwxyz", "abcde"},
{"%.0s", "日本語日本語", ""},
{"%.5s", "日本語日本語", "日本語日本"},
{"%.10s", "日本語日本語", "日本語日本語"},
{"%.5s", []byte("日本語日本語"), "日本語日本"},
{"%.5q", "abcdefghijklmnopqrstuvwxyz", `"abcde"`},
{"%.5x", "abcdefghijklmnopqrstuvwxyz", "6162636465"},
{"%.5q", []byte("abcdefghijklmnopqrstuvwxyz"), `"abcde"`},
{"%.5x", []byte("abcdefghijklmnopqrstuvwxyz"), "6162636465"},
{"%.3q", "日本語日本語", `"日本語"`},
{"%.3q", []byte("日本語日本語"), `"日本語"`},
{"%.1q", "日本語", `"日"`},
{"%.1q", []byte("日本語"), `"日"`},
{"%.1x", "日本語", "e6"},
{"%.1X", []byte("日本語"), "E6"},
{"%10.1q", "日本語日本語", ` "日"`},
{"%10v", nil, " <nil>"},
{"%-10v", nil, "<nil> "},
// integers
{"%d", uint(12345), "12,345"},
{"%d", int(-12345), "-12,345"},
{"%d", ^uint8(0), "255"},
{"%d", ^uint16(0), "65,535"},
{"%d", ^uint32(0), "4,294,967,295"},
{"%d", ^uint64(0), "18,446,744,073,709,551,615"},
{"%d", int8(-1 << 7), "-128"},
{"%d", int16(-1 << 15), "-32,768"},
{"%d", int32(-1 << 31), "-2,147,483,648"},
{"%d", int64(-1 << 63), "-9,223,372,036,854,775,808"},
{"%.d", 0, ""},
{"%.0d", 0, ""},
{"%6.0d", 0, " "},
{"%06.0d", 0, " "},
{"% d", 12345, " 12,345"},
{"%+d", 12345, "+12,345"},
{"%+d", -12345, "-12,345"},
{"%b", 7, "111"},
{"%b", -6, "-110"},
{"%b", ^uint32(0), "11111111111111111111111111111111"},
{"%b", ^uint64(0), "1111111111111111111111111111111111111111111111111111111111111111"},
{"%b", int64(-1 << 63), zeroFill("-1", 63, "")},
{"%o", 01234, "1234"},
{"%#o", 01234, "01234"},
{"%o", ^uint32(0), "37777777777"},
{"%o", ^uint64(0), "1777777777777777777777"},
{"%#X", 0, "0X0"},
{"%x", 0x12abcdef, "12abcdef"},
{"%X", 0x12abcdef, "12ABCDEF"},
{"%x", ^uint32(0), "ffffffff"},
{"%X", ^uint64(0), "FFFFFFFFFFFFFFFF"},
{"%.20b", 7, "00000000000000000111"},
{"%10d", 12345, " 12,345"},
{"%10d", -12345, " -12,345"},
{"%+10d", 12345, " +12,345"},
{"%010d", 12345, "0,000,012,345"},
{"%010d", -12345, "-0,000,012,345"},
{"%20.8d", 1234, " 00,001,234"},
{"%20.8d", -1234, " -00,001,234"},
{"%020.8d", 1234, " 00,001,234"},
{"%020.8d", -1234, " -00,001,234"},
{"%-20.8d", 1234, "00,001,234 "},
{"%-20.8d", -1234, "-00,001,234 "},
{"%-#20.8x", 0x1234abc, "0x01234abc "},
{"%-#20.8X", 0x1234abc, "0X01234ABC "},
{"%-#20.8o", 01234, "00001234 "},
// Test correct f.intbuf overflow checks.
{"%068d", 1, "00," + strings.Repeat("000,", 21) + "001"},
{"%068d", -1, "-00," + strings.Repeat("000,", 21) + "001"},
{"%#.68x", 42, zeroFill("0x", 68, "2a")},
{"%.68d", -42, "-00," + strings.Repeat("000,", 21) + "042"},
{"%+.68d", 42, "+00," + strings.Repeat("000,", 21) + "042"},
{"% .68d", 42, " 00," + strings.Repeat("000,", 21) + "042"},
{"% +.68d", 42, "+00," + strings.Repeat("000,", 21) + "042"},
// unicode format
{"%U", 0, "U+0000"},
{"%U", -1, "U+FFFFFFFFFFFFFFFF"},
{"%U", '\n', `U+000A`},
{"%#U", '\n', `U+000A`},
{"%+U", 'x', `U+0078`}, // Plus flag should have no effect.
{"%# U", 'x', `U+0078 'x'`}, // Space flag should have no effect.
{"%#.2U", 'x', `U+0078 'x'`}, // Precisions below 4 should print 4 digits.
{"%U", '\u263a', `U+263A`},
{"%#U", '\u263a', `U+263A '☺'`},
{"%U", '\U0001D6C2', `U+1D6C2`},
{"%#U", '\U0001D6C2', `U+1D6C2 '𝛂'`},
{"%#14.6U", '⌘', " U+002318 '⌘'"},
{"%#-14.6U", '⌘', "U+002318 '⌘' "},
{"%#014.6U", '⌘', " U+002318 '⌘'"},
{"%#-014.6U", '⌘', "U+002318 '⌘' "},
{"%.68U", uint(42), zeroFill("U+", 68, "2A")},
{"%#.68U", '日', zeroFill("U+", 68, "65E5") + " '日'"},
// floats
{"%+.3e", 0.0, "+0.000\u202f×\u202f10⁰⁰"},
{"%+.3e", 1.0, "+1.000\u202f×\u202f10⁰⁰"},
{"%+.3f", -1.0, "-1.000"},
{"%+.3F", -1.0, "-1.000"},
{"%+.3F", float32(-1.0), "-1.000"},
{"%+07.2f", 1.0, "+001.00"},
{"%+07.2f", -1.0, "-001.00"},
{"%-07.2f", 1.0, "1.00 "},
{"%-07.2f", -1.0, "-1.00 "},
{"%+-07.2f", 1.0, "+1.00 "},
{"%+-07.2f", -1.0, "-1.00 "},
{"%-+07.2f", 1.0, "+1.00 "},
{"%-+07.2f", -1.0, "-1.00 "},
{"%+10.2f", +1.0, " +1.00"},
{"%+10.2f", -1.0, " -1.00"},
{"% .3E", -1.0, "-1.000\u202f×\u202f10⁰⁰"},
{"% .3e", 1.0, " 1.000\u202f×\u202f10⁰⁰"},
{"%+.3g", 0.0, "+0"},
{"%+.3g", 1.0, "+1"},
{"%+.3g", -1.0, "-1"},
{"% .3g", -1.0, "-1"},
{"% .3g", 1.0, " 1"},
{"%b", float32(1.0), "8388608p-23"},
{"%b", 1.0, "4503599627370496p-52"},
// Test sharp flag used with floats.
{"%#g", 1e-323, "1.00000e-323"},
{"%#g", -1.0, "-1.00000"},
{"%#g", 1.1, "1.10000"},
{"%#g", 123456.0, "123456."},
{"%#g", 1234567.0, "1.234567e+06"},
{"%#g", 1230000.0, "1.23000e+06"},
{"%#g", 1000000.0, "1.00000e+06"},
{"%#.0f", 1.0, "1."},
{"%#.0e", 1.0, "1.e+00"},
{"%#.0g", 1.0, "1."},
{"%#.0g", 1100000.0, "1.e+06"},
{"%#.4f", 1.0, "1.0000"},
{"%#.4e", 1.0, "1.0000e+00"},
{"%#.4g", 1.0, "1.000"},
{"%#.4g", 100000.0, "1.000e+05"},
{"%#.0f", 123.0, "123."},
{"%#.0e", 123.0, "1.e+02"},
{"%#.0g", 123.0, "1.e+02"},
{"%#.4f", 123.0, "123.0000"},
{"%#.4e", 123.0, "1.2300e+02"},
{"%#.4g", 123.0, "123.0"},
{"%#.4g", 123000.0, "1.230e+05"},
{"%#9.4g", 1.0, " 1.000"},
// The sharp flag has no effect for binary float format.
{"%#b", 1.0, "4503599627370496p-52"},
// Precision has no effect for binary float format.
{"%.4b", float32(1.0), "8388608p-23"},
{"%.4b", -1.0, "-4503599627370496p-52"},
// Test correct f.intbuf boundary checks.
{"%.68f", 1.0, zeroFill("1.", 68, "")},
{"%.68f", -1.0, zeroFill("-1.", 68, "")},
// float infinites and NaNs
{"%f", posInf, "∞"},
{"%.1f", negInf, "-∞"},
{"% f", NaN, "NaN"},
{"%20f", posInf, " ∞"},
{"% 20F", posInf, " ∞"},
{"% 20e", negInf, " -∞"},
{"%+20E", negInf, " -∞"},
{"% +20g", negInf, " -∞"},
{"%+-20G", posInf, "+∞ "},
{"%20e", NaN, " NaN"},
{"% +20E", NaN, " NaN"},
{"% -20g", NaN, "NaN "},
{"%+-20G", NaN, "NaN "},
// Zero padding does not apply to infinities and NaN.
{"%+020e", posInf, " +∞"},
{"%-020f", negInf, "-∞ "},
{"%-020E", NaN, "NaN "},
// complex values
{"%.f", 0i, "(0+0i)"},
{"% .f", 0i, "( 0+0i)"},
{"%+.f", 0i, "(+0+0i)"},
{"% +.f", 0i, "(+0+0i)"},
{"%+.3e", 0i, "(+0.000\u202f×\u202f10⁰⁰+0.000\u202f×\u202f10⁰⁰i)"},
{"%+.3f", 0i, "(+0.000+0.000i)"},
{"%+.3g", 0i, "(+0+0i)"},
{"%+.3e", 1 + 2i, "(+1.000\u202f×\u202f10⁰⁰+2.000\u202f×\u202f10⁰⁰i)"},
{"%+.3f", 1 + 2i, "(+1.000+2.000i)"},
{"%+.3g", 1 + 2i, "(+1+2i)"},
{"%.3e", 0i, "(0.000\u202f×\u202f10⁰⁰+0.000\u202f×\u202f10⁰⁰i)"},
{"%.3f", 0i, "(0.000+0.000i)"},
{"%.3F", 0i, "(0.000+0.000i)"},
{"%.3F", complex64(0i), "(0.000+0.000i)"},
{"%.3g", 0i, "(0+0i)"},
{"%.3e", 1 + 2i, "(1.000\u202f×\u202f10⁰⁰+2.000\u202f×\u202f10⁰⁰i)"},
{"%.3f", 1 + 2i, "(1.000+2.000i)"},
{"%.3g", 1 + 2i, "(1+2i)"},
{"%.3e", -1 - 2i, "(-1.000\u202f×\u202f10⁰⁰-2.000\u202f×\u202f10⁰⁰i)"},
{"%.3f", -1 - 2i, "(-1.000-2.000i)"},
{"%.3g", -1 - 2i, "(-1-2i)"},
{"% .3E", -1 - 2i, "(-1.000\u202f×\u202f10⁰⁰-2.000\u202f×\u202f10⁰⁰i)"},
{"%+.3g", 1 + 2i, "(+1+2i)"},
{"%+.3g", complex64(1 + 2i), "(+1+2i)"},
{"%#g", 1 + 2i, "(1.00000+2.00000i)"},
{"%#g", 123456 + 789012i, "(123456.+789012.i)"},
{"%#g", 1e-10i, "(0.00000+1.00000e-10i)"},
{"%#g", -1e10 - 1.11e100i, "(-1.00000e+10-1.11000e+100i)"},
{"%#.0f", 1.23 + 1.0i, "(1.+1.i)"},
{"%#.0e", 1.23 + 1.0i, "(1.e+00+1.e+00i)"},
{"%#.0g", 1.23 + 1.0i, "(1.+1.i)"},
{"%#.0g", 0 + 100000i, "(0.+1.e+05i)"},
{"%#.0g", 1230000 + 0i, "(1.e+06+0.i)"},
{"%#.4f", 1 + 1.23i, "(1.0000+1.2300i)"},
{"%#.4e", 123 + 1i, "(1.2300e+02+1.0000e+00i)"},
{"%#.4g", 123 + 1.23i, "(123.0+1.230i)"},
{"%#12.5g", 0 + 100000i, "( 0.0000 +1.0000e+05i)"},
{"%#12.5g", 1230000 - 0i, "( 1.2300e+06 +0.0000i)"},
{"%b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"},
{"%b", complex64(1 + 2i), "(8388608p-23+8388608p-22i)"},
// The sharp flag has no effect for binary complex format.
{"%#b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"},
// Precision has no effect for binary complex format.
{"%.4b", 1 + 2i, "(4503599627370496p-52+4503599627370496p-51i)"},
{"%.4b", complex64(1 + 2i), "(8388608p-23+8388608p-22i)"},
// complex infinites and NaNs
{"%f", complex(posInf, posInf), "(∞+∞i)"},
{"%f", complex(negInf, negInf), "(-∞-∞i)"},
{"%f", complex(NaN, NaN), "(NaN+NaNi)"},
{"%.1f", complex(posInf, posInf), "(∞+∞i)"},
{"% f", complex(posInf, posInf), "( ∞+∞i)"},
{"% f", complex(negInf, negInf), "(-∞-∞i)"},
{"% f", complex(NaN, NaN), "(NaN+NaNi)"},
{"%8e", complex(posInf, posInf), "( ∞ +∞i)"},
{"% 8E", complex(posInf, posInf), "( ∞ +∞i)"},
{"%+8f", complex(negInf, negInf), "( -∞ -∞i)"},
{"% +8g", complex(negInf, negInf), "( -∞ -∞i)"}, // TODO(g)
{"% -8G", complex(NaN, NaN), "(NaN +NaN i)"},
{"%+-8b", complex(NaN, NaN), "(+NaN +NaN i)"},
// Zero padding does not apply to infinities and NaN.
{"%08f", complex(posInf, posInf), "( ∞ +∞i)"},
{"%-08g", complex(negInf, negInf), "(-∞ -∞ i)"},
{"%-08G", complex(NaN, NaN), "(NaN +NaN i)"},
// old test/fmt_test.go
{"%e", 1.0, "1.000000\u202f×\u202f10⁰⁰"},
{"%e", 1234.5678e3, "1.234568\u202f×\u202f10⁰⁶"},
{"%e", 1234.5678e-8, "1.234568\u202f×\u202f10⁻⁰⁵"},
{"%e", -7.0, "-7.000000\u202f×\u202f10⁰⁰"},
{"%e", -1e-9, "-1.000000\u202f×\u202f10⁻⁰⁹"},
{"%f", 1234.5678e3, "1,234,567.800000"},
{"%f", 1234.5678e-8, "0.000012"},
{"%f", -7.0, "-7.000000"},
{"%f", -1e-9, "-0.000000"},
{"%g", 1234.5678e3, "1.2345678\u202f×\u202f10⁰⁶"},
{"%g", float32(1234.5678e3), "1.2345678\u202f×\u202f10⁰⁶"},
{"%g", 1234.5678e-8, "1.2345678\u202f×\u202f10⁻⁰⁵"},
{"%g", -7.0, "-7"},
{"%g", -1e-9, "-1\u202f×\u202f10⁻⁰⁹"},
{"%g", float32(-1e-9), "-1\u202f×\u202f10⁻⁰⁹"},
{"%E", 1.0, "1.000000\u202f×\u202f10⁰⁰"},
{"%E", 1234.5678e3, "1.234568\u202f×\u202f10⁰⁶"},
{"%E", 1234.5678e-8, "1.234568\u202f×\u202f10⁻⁰⁵"},
{"%E", -7.0, "-7.000000\u202f×\u202f10⁰⁰"},
{"%E", -1e-9, "-1.000000\u202f×\u202f10⁻⁰⁹"},
{"%G", 1234.5678e3, "1.2345678\u202f×\u202f10⁰⁶"},
{"%G", float32(1234.5678e3), "1.2345678\u202f×\u202f10⁰⁶"},
{"%G", 1234.5678e-8, "1.2345678\u202f×\u202f10⁻⁰⁵"},
{"%G", -7.0, "-7"},
{"%G", -1e-9, "-1\u202f×\u202f10⁻⁰⁹"},
{"%G", float32(-1e-9), "-1\u202f×\u202f10⁻⁰⁹"},
{"%20.5s", "qwertyuiop", " qwert"},
{"%.5s", "qwertyuiop", "qwert"},
{"%-20.5s", "qwertyuiop", "qwert "},
{"%20c", 'x', " x"},
{"%-20c", 'x', "x "},
{"%20.6e", 1.2345e3, " 1.234500\u202f×\u202f10⁰³"},
{"%20.6e", 1.2345e-3, " 1.234500\u202f×\u202f10⁻⁰³"},
{"%20e", 1.2345e3, " 1.234500\u202f×\u202f10⁰³"},
{"%20e", 1.2345e-3, " 1.234500\u202f×\u202f10⁻⁰³"},
{"%20.8e", 1.2345e3, " 1.23450000\u202f×\u202f10⁰³"},
{"%20f", 1.23456789e3, " 1,234.567890"},
{"%20f", 1.23456789e-3, " 0.001235"},
{"%20f", 12345678901.23456789, "12,345,678,901.234568"},
{"%-20f", 1.23456789e3, "1,234.567890 "},
{"%20.8f", 1.23456789e3, " 1,234.56789000"},
{"%20.8f", 1.23456789e-3, " 0.00123457"},
{"%g", 1.23456789e3, "1,234.56789"},
{"%g", 1.23456789e-3, "0.00123456789"},
{"%g", 1.23456789e20, "1.23456789\u202f×\u202f10²⁰"},
// arrays
{"%v", array, "[1 2 3 4 5]"},
{"%v", iarray, "[1 hello 2.5 <nil>]"},
{"%v", barray, "[1 2 3 4 5]"},
{"%v", &array, "&[1 2 3 4 5]"},
{"%v", &iarray, "&[1 hello 2.5 <nil>]"},
{"%v", &barray, "&[1 2 3 4 5]"},
// slices
{"%v", slice, "[1 2 3 4 5]"},
{"%v", islice, "[1 hello 2.5 <nil>]"},
{"%v", bslice, "[1 2 3 4 5]"},
{"%v", &slice, "&[1 2 3 4 5]"},
{"%v", &islice, "&[1 hello 2.5 <nil>]"},
{"%v", &bslice, "&[1 2 3 4 5]"},
// byte arrays and slices with %b,%c,%d,%o,%U and %v
{"%b", [3]byte{65, 66, 67}, "[1000001 1000010 1000011]"},
{"%c", [3]byte{65, 66, 67}, "[A B C]"},
{"%d", [3]byte{65, 66, 67}, "[65 66 67]"},
{"%o", [3]byte{65, 66, 67}, "[101 102 103]"},
{"%U", [3]byte{65, 66, 67}, "[U+0041 U+0042 U+0043]"},
{"%v", [3]byte{65, 66, 67}, "[65 66 67]"},
{"%v", [1]byte{123}, "[123]"},
{"%012v", []byte{}, "[]"},
{"%#012v", []byte{}, "[]byte{}"},
{"%6v", []byte{1, 11, 111}, "[ 1 11 111]"},
{"%06v", []byte{1, 11, 111}, "[000001 000011 000111]"},
{"%-6v", []byte{1, 11, 111}, "[1 11 111 ]"},
{"%-06v", []byte{1, 11, 111}, "[1 11 111 ]"},
{"%#v", []byte{1, 11, 111}, "[]byte{0x1, 0xb, 0x6f}"},
{"%#6v", []byte{1, 11, 111}, "[]byte{ 0x1, 0xb, 0x6f}"},
{"%#06v", []byte{1, 11, 111}, "[]byte{0x000001, 0x00000b, 0x00006f}"},
{"%#-6v", []byte{1, 11, 111}, "[]byte{0x1 , 0xb , 0x6f }"},
{"%#-06v", []byte{1, 11, 111}, "[]byte{0x1 , 0xb , 0x6f }"},
// f.space should and f.plus should not have an effect with %v.
{"% v", []byte{1, 11, 111}, "[ 1 11 111]"},
{"%+v", [3]byte{1, 11, 111}, "[1 11 111]"},
{"%# -6v", []byte{1, 11, 111}, "[]byte{ 0x1 , 0xb , 0x6f }"},
{"%#+-6v", [3]byte{1, 11, 111}, "[3]uint8{0x1 , 0xb , 0x6f }"},
// f.space and f.plus should have an effect with %d.
{"% d", []byte{1, 11, 111}, "[ 1 11 111]"},
{"%+d", [3]byte{1, 11, 111}, "[+1 +11 +111]"},
{"%# -6d", []byte{1, 11, 111}, "[ 1 11 111 ]"},
{"%#+-6d", [3]byte{1, 11, 111}, "[+1 +11 +111 ]"},
// floates with %v
{"%v", 1.2345678, "1.2345678"},
{"%v", float32(1.2345678), "1.2345678"},
// complexes with %v
{"%v", 1 + 2i, "(1+2i)"},
{"%v", complex64(1 + 2i), "(1+2i)"},
// structs
{"%v", A{1, 2, "a", []int{1, 2}}, `{1 2 a [1 2]}`},
{"%+v", A{1, 2, "a", []int{1, 2}}, `{i:1 j:2 s:a x:[1 2]}`},
// +v on structs with Stringable items
{"%+v", B{1, 2}, `{I:<1> j:2}`},
{"%+v", C{1, B{2, 3}}, `{i:1 B:{I:<2> j:3}}`},
// other formats on Stringable items
{"%s", I(23), `<23>`},
{"%q", I(23), `"<23>"`},
{"%x", I(23), `3c32333e`},
{"%#x", I(23), `0x3c32333e`},
{"%# x", I(23), `0x3c 0x32 0x33 0x3e`},
// Stringer applies only to string formats.
{"%d", I(23), `23`},
// Stringer applies to the extracted value.
{"%s", reflect.ValueOf(I(23)), `<23>`},
// go syntax
{"%#v", A{1, 2, "a", []int{1, 2}}, `message.A{i:1, j:0x2, s:"a", x:[]int{1, 2}}`},
{"%#v", new(byte), "(*uint8)(0xPTR)"},
{"%#v", TestFmtInterface, "(func(*testing.T))(0xPTR)"},
{"%#v", make(chan int), "(chan int)(0xPTR)"},
{"%#v", uint64(1<<64 - 1), "0xffffffffffffffff"},
{"%#v", 1000000000, "1000000000"},
{"%#v", map[string]int{"a": 1}, `map[string]int{"a":1}`},
{"%#v", map[string]B{"a": {1, 2}}, `map[string]message.B{"a":message.B{I:1, j:2}}`},
{"%#v", []string{"a", "b"}, `[]string{"a", "b"}`},
{"%#v", SI{}, `message.SI{I:interface {}(nil)}`},
{"%#v", []int(nil), `[]int(nil)`},
{"%#v", []int{}, `[]int{}`},
{"%#v", array, `[5]int{1, 2, 3, 4, 5}`},
{"%#v", &array, `&[5]int{1, 2, 3, 4, 5}`},
{"%#v", iarray, `[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
{"%#v", &iarray, `&[4]interface {}{1, "hello", 2.5, interface {}(nil)}`},
{"%#v", map[int]byte(nil), `map[int]uint8(nil)`},
{"%#v", map[int]byte{}, `map[int]uint8{}`},
{"%#v", "foo", `"foo"`},
{"%#v", barray, `[5]message.renamedUint8{0x1, 0x2, 0x3, 0x4, 0x5}`},
{"%#v", bslice, `[]message.renamedUint8{0x1, 0x2, 0x3, 0x4, 0x5}`},
{"%#v", []int32(nil), "[]int32(nil)"},
{"%#v", 1.2345678, "1.2345678"},
{"%#v", float32(1.2345678), "1.2345678"},
// Only print []byte and []uint8 as type []byte if they appear at the top level.
{"%#v", []byte(nil), "[]byte(nil)"},
{"%#v", []uint8(nil), "[]byte(nil)"},
{"%#v", []byte{}, "[]byte{}"},
{"%#v", []uint8{}, "[]byte{}"},
{"%#v", reflect.ValueOf([]byte{}), "[]uint8{}"},
{"%#v", reflect.ValueOf([]uint8{}), "[]uint8{}"},
{"%#v", &[]byte{}, "&[]uint8{}"},
{"%#v", &[]byte{}, "&[]uint8{}"},
{"%#v", [3]byte{}, "[3]uint8{0x0, 0x0, 0x0}"},
{"%#v", [3]uint8{}, "[3]uint8{0x0, 0x0, 0x0}"},
// slices with other formats
{"%#x", []int{1, 2, 15}, `[0x1 0x2 0xf]`},
{"%x", []int{1, 2, 15}, `[1 2 f]`},
{"%d", []int{1, 2, 15}, `[1 2 15]`},
{"%d", []byte{1, 2, 15}, `[1 2 15]`},
{"%q", []string{"a", "b"}, `["a" "b"]`},
{"% 02x", []byte{1}, "01"},
{"% 02x", []byte{1, 2, 3}, "01 02 03"},
// Padding with byte slices.
{"%2x", []byte{}, " "},
{"%#2x", []byte{}, " "},
{"% 02x", []byte{}, "00"},
{"%# 02x", []byte{}, "00"},
{"%-2x", []byte{}, " "},
{"%-02x", []byte{}, " "},
{"%8x", []byte{0xab}, " ab"},
{"% 8x", []byte{0xab}, " ab"},
{"%#8x", []byte{0xab}, " 0xab"},
{"%# 8x", []byte{0xab}, " 0xab"},
{"%08x", []byte{0xab}, "000000ab"},
{"% 08x", []byte{0xab}, "000000ab"},
{"%#08x", []byte{0xab}, "00000xab"},
{"%# 08x", []byte{0xab}, "00000xab"},
{"%10x", []byte{0xab, 0xcd}, " abcd"},
{"% 10x", []byte{0xab, 0xcd}, " ab cd"},
{"%#10x", []byte{0xab, 0xcd}, " 0xabcd"},
{"%# 10x", []byte{0xab, 0xcd}, " 0xab 0xcd"},
{"%010x", []byte{0xab, 0xcd}, "000000abcd"},
{"% 010x", []byte{0xab, 0xcd}, "00000ab cd"},
{"%#010x", []byte{0xab, 0xcd}, "00000xabcd"},
{"%# 010x", []byte{0xab, 0xcd}, "00xab 0xcd"},
{"%-10X", []byte{0xab}, "AB "},
{"% -010X", []byte{0xab}, "AB "},
{"%#-10X", []byte{0xab, 0xcd}, "0XABCD "},
{"%# -010X", []byte{0xab, 0xcd}, "0XAB 0XCD "},
// Same for strings
{"%2x", "", " "},
{"%#2x", "", " "},
{"% 02x", "", "00"},
{"%# 02x", "", "00"},
{"%-2x", "", " "},
{"%-02x", "", " "},
{"%8x", "\xab", " ab"},
{"% 8x", "\xab", " ab"},
{"%#8x", "\xab", " 0xab"},
{"%# 8x", "\xab", " 0xab"},
{"%08x", "\xab", "000000ab"},
{"% 08x", "\xab", "000000ab"},
{"%#08x", "\xab", "00000xab"},
{"%# 08x", "\xab", "00000xab"},
{"%10x", "\xab\xcd", " abcd"},
{"% 10x", "\xab\xcd", " ab cd"},
{"%#10x", "\xab\xcd", " 0xabcd"},
{"%# 10x", "\xab\xcd", " 0xab 0xcd"},
{"%010x", "\xab\xcd", "000000abcd"},
{"% 010x", "\xab\xcd", "00000ab cd"},
{"%#010x", "\xab\xcd", "00000xabcd"},
{"%# 010x", "\xab\xcd", "00xab 0xcd"},
{"%-10X", "\xab", "AB "},
{"% -010X", "\xab", "AB "},
{"%#-10X", "\xab\xcd", "0XABCD "},
{"%# -010X", "\xab\xcd", "0XAB 0XCD "},
// renamings
{"%v", renamedBool(true), "true"},
{"%d", renamedBool(true), "%!d(message.renamedBool=true)"},
{"%o", renamedInt(8), "10"},
{"%d", renamedInt8(-9), "-9"},
{"%v", renamedInt16(10), "10"},
{"%v", renamedInt32(-11), "-11"},
{"%X", renamedInt64(255), "FF"},
{"%v", renamedUint(13), "13"},
{"%o", renamedUint8(14), "16"},
{"%X", renamedUint16(15), "F"},
{"%d", renamedUint32(16), "16"},
{"%X", renamedUint64(17), "11"},
{"%o", renamedUintptr(18), "22"},
{"%x", renamedString("thing"), "7468696e67"},
{"%d", renamedBytes([]byte{1, 2, 15}), `[1 2 15]`},
{"%q", renamedBytes([]byte("hello")), `"hello"`},
{"%x", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "68656c6c6f"},
{"%X", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "68656C6C6F"},
{"%s", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, "hello"},
{"%q", []renamedUint8{'h', 'e', 'l', 'l', 'o'}, `"hello"`},
{"%v", renamedFloat32(22), "22"},
{"%v", renamedFloat64(33), "33"},
{"%v", renamedComplex64(3 + 4i), "(3+4i)"},
{"%v", renamedComplex128(4 - 3i), "(4-3i)"},
// Formatter
{"%x", F(1), "<x=F(1)>"},
{"%x", G(2), "2"},
{"%+v", S{F(4), G(5)}, "{F:<v=F(4)> G:5}"},
// GoStringer
{"%#v", G(6), "GoString(6)"},
{"%#v", S{F(7), G(8)}, "message.S{F:<v=F(7)>, G:GoString(8)}"},
// %T
{"%T", byte(0), "uint8"},
{"%T", reflect.ValueOf(nil), "reflect.Value"},
{"%T", (4 - 3i), "complex128"},
{"%T", renamedComplex128(4 - 3i), "message.renamedComplex128"},
{"%T", intVar, "int"},
{"%6T", &intVar, " *int"},
{"%10T", nil, " <nil>"},
{"%-10T", nil, "<nil> "},
// %p with pointers
{"%p", (*int)(nil), "0x0"},
{"%#p", (*int)(nil), "0"},
{"%p", &intVar, "0xPTR"},
{"%#p", &intVar, "PTR"},
{"%p", &array, "0xPTR"},
{"%p", &slice, "0xPTR"},
{"%8.2p", (*int)(nil), " 0x00"},
{"%-20.16p", &intVar, "0xPTR "},
// %p on non-pointers
{"%p", make(chan int), "0xPTR"},
{"%p", make(map[int]int), "0xPTR"},
{"%p", func() {}, "0xPTR"},
{"%p", 27, "%!p(int=27)"}, // not a pointer at all
{"%p", nil, "%!p(<nil>)"}, // nil on its own has no type ...
{"%#p", nil, "%!p(<nil>)"}, // ... and hence is not a pointer type.
// pointers with specified base
{"%b", &intVar, "PTR_b"},
{"%d", &intVar, "PTR_d"},
{"%o", &intVar, "PTR_o"},
{"%x", &intVar, "PTR_x"},
{"%X", &intVar, "PTR_X"},
// %v on pointers
{"%v", nil, "<nil>"},
{"%#v", nil, "<nil>"},
{"%v", (*int)(nil), "<nil>"},
{"%#v", (*int)(nil), "(*int)(nil)"},
{"%v", &intVar, "0xPTR"},
{"%#v", &intVar, "(*int)(0xPTR)"},
{"%8.2v", (*int)(nil), " <nil>"},
{"%-20.16v", &intVar, "0xPTR "},
// string method on pointer
{"%s", &pValue, "String(p)"}, // String method...
{"%p", &pValue, "0xPTR"}, // ... is not called with %p.
// %d on Stringer should give integer if possible
{"%s", time.Time{}.Month(), "January"},
{"%d", time.Time{}.Month(), "1"},
// erroneous things
{"%s %", "hello", "hello %!(NOVERB)"},
{"%s %.2", "hello", "hello %!(NOVERB)"},
// The "<nil>" show up because maps are printed by
// first obtaining a list of keys and then looking up
// each key. Since NaNs can be map keys but cannot
// be fetched directly, the lookup fails and returns a
// zero reflect.Value, which formats as <nil>.
// This test is just to check that it shows the two NaNs at all.
{"%v", map[float64]int{NaN: 1, NaN: 2}, "map[NaN:<nil> NaN:<nil>]"},
// Comparison of padding rules with C printf.
/*
C program:
#include <stdio.h>
char *format[] = {
"[%.2f]",
"[% .2f]",
"[%+.2f]",
"[%7.2f]",
"[% 7.2f]",
"[%+7.2f]",
"[% +7.2f]",
"[%07.2f]",
"[% 07.2f]",
"[%+07.2f]",
"[% +07.2f]"
};
int main(void) {
int i;
for(i = 0; i < 11; i++) {
printf("%s: ", format[i]);
printf(format[i], 1.0);
printf(" ");
printf(format[i], -1.0);
printf("\n");
}
}
Output:
[%.2f]: [1.00] [-1.00]
[% .2f]: [ 1.00] [-1.00]
[%+.2f]: [+1.00] [-1.00]
[%7.2f]: [ 1.00] [ -1.00]
[% 7.2f]: [ 1.00] [ -1.00]
[%+7.2f]: [ +1.00] [ -1.00]
[% +7.2f]: [ +1.00] [ -1.00]
[%07.2f]: [0001.00] [-001.00]
[% 07.2f]: [ 001.00] [-001.00]
[%+07.2f]: [+001.00] [-001.00]
[% +07.2f]: [+001.00] [-001.00]
*/
{"%.2f", 1.0, "1.00"},
{"%.2f", -1.0, "-1.00"},
{"% .2f", 1.0, " 1.00"},
{"% .2f", -1.0, "-1.00"},
{"%+.2f", 1.0, "+1.00"},
{"%+.2f", -1.0, "-1.00"},
{"%7.2f", 1.0, " 1.00"},
{"%7.2f", -1.0, " -1.00"},
{"% 7.2f", 1.0, " 1.00"},
{"% 7.2f", -1.0, " -1.00"},
{"%+7.2f", 1.0, " +1.00"},
{"%+7.2f", -1.0, " -1.00"},
{"% +7.2f", 1.0, " +1.00"},
{"% +7.2f", -1.0, " -1.00"},
// Padding with 0's indicates minimum number of integer digits minus the
// period, if present, and minus the sign if it is fixed.
// TODO: consider making this number the number of significant digits.
{"%07.2f", 1.0, "0,001.00"},
{"%07.2f", -1.0, "-0,001.00"},
{"% 07.2f", 1.0, " 001.00"},
{"% 07.2f", -1.0, "-001.00"},
{"%+07.2f", 1.0, "+001.00"},
{"%+07.2f", -1.0, "-001.00"},
{"% +07.2f", 1.0, "+001.00"},
{"% +07.2f", -1.0, "-001.00"},
// Complex numbers: exhaustively tested in TestComplexFormatting.
{"%7.2f", 1 + 2i, "( 1.00 +2.00i)"},
{"%+07.2f", -1 - 2i, "(-001.00-002.00i)"},
// Use spaces instead of zero if padding to the right.
{"%0-5s", "abc", "abc "},
{"%-05.1f", 1.0, "1.0 "},
// float and complex formatting should not change the padding width
// for other elements. See issue 14642.
{"%06v", []interface{}{+10.0, 10}, "[000,010 000,010]"},
{"%06v", []interface{}{-10.0, 10}, "[-000,010 000,010]"},
{"%06v", []interface{}{+10.0 + 10i, 10}, "[(000,010+00,010i) 000,010]"},
{"%06v", []interface{}{-10.0 + 10i, 10}, "[(-000,010+00,010i) 000,010]"},
// integer formatting should not alter padding for other elements.
{"%03.6v", []interface{}{1, 2.0, "x"}, "[000,001 002 00x]"},
{"%03.0v", []interface{}{0, 2.0, "x"}, "[ 002 000]"},
// Complex fmt used to leave the plus flag set for future entries in the array
// causing +2+0i and +3+0i instead of 2+0i and 3+0i.
{"%v", []complex64{1, 2, 3}, "[(1+0i) (2+0i) (3+0i)]"},
{"%v", []complex128{1, 2, 3}, "[(1+0i) (2+0i) (3+0i)]"},
// Incomplete format specification caused crash.
{"%.", 3, "%!.(int=3)"},
// Padding for complex numbers. Has been bad, then fixed, then bad again.
{"%+10.2f", +104.66 + 440.51i, "( +104.66 +440.51i)"},
{"%+10.2f", -104.66 + 440.51i, "( -104.66 +440.51i)"},
{"%+10.2f", +104.66 - 440.51i, "( +104.66 -440.51i)"},
{"%+10.2f", -104.66 - 440.51i, "( -104.66 -440.51i)"},
{"%010.2f", +104.66 + 440.51i, "(0,000,104.66+000,440.51i)"},
{"%+010.2f", +104.66 + 440.51i, "(+000,104.66+000,440.51i)"},
{"%+010.2f", -104.66 + 440.51i, "(-000,104.66+000,440.51i)"},
{"%+010.2f", +104.66 - 440.51i, "(+000,104.66-000,440.51i)"},
{"%+010.2f", -104.66 - 440.51i, "(-000,104.66-000,440.51i)"},
// []T where type T is a byte with a Stringer method.
{"%v", byteStringerSlice, "[X X X X X]"},
{"%s", byteStringerSlice, "hello"},
{"%q", byteStringerSlice, "\"hello\""},
{"%x", byteStringerSlice, "68656c6c6f"},
{"%X", byteStringerSlice, "68656C6C6F"},
{"%#v", byteStringerSlice, "[]message.byteStringer{0x68, 0x65, 0x6c, 0x6c, 0x6f}"},
// And the same for Formatter.
{"%v", byteFormatterSlice, "[X X X X X]"},
{"%s", byteFormatterSlice, "hello"},
{"%q", byteFormatterSlice, "\"hello\""},
{"%x", byteFormatterSlice, "68656c6c6f"},
{"%X", byteFormatterSlice, "68656C6C6F"},
// This next case seems wrong, but the docs say the Formatter wins here.
{"%#v", byteFormatterSlice, "[]message.byteFormatter{X, X, X, X, X}"},
// reflect.Value handled specially in Go 1.5, making it possible to
// see inside non-exported fields (which cannot be accessed with Interface()).
// Issue 8965.
{"%v", reflect.ValueOf(A{}).Field(0).String(), "<int Value>"}, // Equivalent to the old way.
{"%v", reflect.ValueOf(A{}).Field(0), "0"}, // Sees inside the field.
// verbs apply to the extracted value too.
{"%s", reflect.ValueOf("hello"), "hello"},
{"%q", reflect.ValueOf("hello"), `"hello"`},
{"%#04x", reflect.ValueOf(256), "0x0100"},
// invalid reflect.Value doesn't crash.
{"%v", reflect.Value{}, "<invalid reflect.Value>"},
{"%v", &reflect.Value{}, "<invalid Value>"},
{"%v", SI{reflect.Value{}}, "{<invalid Value>}"},
// Tests to check that not supported verbs generate an error string.
{"%☠", nil, "%!☠(<nil>)"},
{"%☠", interface{}(nil), "%!☠(<nil>)"},
{"%☠", int(0), "%!☠(int=0)"},
{"%☠", uint(0), "%!☠(uint=0)"},
{"%☠", []byte{0, 1}, "[%!☠(uint8=0) %!☠(uint8=1)]"},
{"%☠", []uint8{0, 1}, "[%!☠(uint8=0) %!☠(uint8=1)]"},
{"%☠", [1]byte{0}, "[%!☠(uint8=0)]"},
{"%☠", [1]uint8{0}, "[%!☠(uint8=0)]"},
{"%☠", "hello", "%!☠(string=hello)"},
{"%☠", 1.2345678, "%!☠(float64=1.2345678)"},
{"%☠", float32(1.2345678), "%!☠(float32=1.2345678)"},
{"%☠", 1.2345678 + 1.2345678i, "%!☠(complex128=(1.2345678+1.2345678i))"},
{"%☠", complex64(1.2345678 + 1.2345678i), "%!☠(complex64=(1.2345678+1.2345678i))"},
{"%☠", &intVar, "%!☠(*int=0xPTR)"},
{"%☠", make(chan int), "%!☠(chan int=0xPTR)"},
{"%☠", func() {}, "%!☠(func()=0xPTR)"},
{"%☠", reflect.ValueOf(renamedInt(0)), "%!☠(message.renamedInt=0)"},
{"%☠", SI{renamedInt(0)}, "{%!☠(message.renamedInt=0)}"},
{"%☠", &[]interface{}{I(1), G(2)}, "&[%!☠(message.I=1) %!☠(message.G=2)]"},
{"%☠", SI{&[]interface{}{I(1), G(2)}}, "{%!☠(*[]interface {}=&[1 2])}"},
{"%☠", reflect.Value{}, "<invalid reflect.Value>"},
{"%☠", map[float64]int{NaN: 1}, "map[%!☠(float64=NaN):%!☠(<nil>)]"},
}
// zeroFill generates zero-filled strings of the specified width. The length
// of the suffix (but not the prefix) is compensated for in the width calculation.
func zeroFill(prefix string, width int, suffix string) string {
return prefix + strings.Repeat("0", width-len(suffix)) + suffix
}
func TestSprintf(t *testing.T) {
p := NewPrinter(language.Und)
for _, tt := range fmtTests {
t.Run(fmt.Sprint(tt.fmt, "/", tt.val), func(t *testing.T) {
s := p.Sprintf(tt.fmt, tt.val)
i := strings.Index(tt.out, "PTR")
if i >= 0 && i < len(s) {
var pattern, chars string
switch {
case strings.HasPrefix(tt.out[i:], "PTR_b"):
pattern = "PTR_b"
chars = "01"
case strings.HasPrefix(tt.out[i:], "PTR_o"):
pattern = "PTR_o"
chars = "01234567"
case strings.HasPrefix(tt.out[i:], "PTR_d"):
pattern = "PTR_d"
chars = "0123456789"
case strings.HasPrefix(tt.out[i:], "PTR_x"):
pattern = "PTR_x"
chars = "0123456789abcdef"
case strings.HasPrefix(tt.out[i:], "PTR_X"):
pattern = "PTR_X"
chars = "0123456789ABCDEF"
default:
pattern = "PTR"
chars = "0123456789abcdefABCDEF"
}
p := s[:i] + pattern
for j := i; j < len(s); j++ {
if !strings.ContainsRune(chars, rune(s[j])) {
p += s[j:]
break
}
}
s = p
}
if s != tt.out {
if _, ok := tt.val.(string); ok {
// Don't requote the already-quoted strings.
// It's too confusing to read the errors.
t.Errorf("Sprintf(%q, %q) = <%s> want <%s>", tt.fmt, tt.val, s, tt.out)
} else {
t.Errorf("Sprintf(%q, %v) = %q want %q", tt.fmt, tt.val, s, tt.out)
}
}
})
}
}
var f float64
// TestComplexFormatting checks that a complex always formats to the same
// thing as if done by hand with two singleton prints.
func TestComplexFormatting(t *testing.T) {
var yesNo = []bool{true, false}
var values = []float64{1, 0, -1, posInf, negInf, NaN}
p := NewPrinter(language.Und)
for _, plus := range yesNo {
for _, zero := range yesNo {
for _, space := range yesNo {
for _, char := range "fFeEgG" {
realFmt := "%"
if zero {
realFmt += "0"
}
if space {
realFmt += " "
}
if plus {
realFmt += "+"
}
realFmt += "10.2"
realFmt += string(char)
// Imaginary part always has a sign, so force + and ignore space.
imagFmt := "%"
if zero {
imagFmt += "0"
}
imagFmt += "+"
imagFmt += "10.2"
imagFmt += string(char)
for _, realValue := range values {
for _, imagValue := range values {
one := p.Sprintf(realFmt, complex(realValue, imagValue))
two := p.Sprintf("("+realFmt+imagFmt+"i)", realValue, imagValue)
if math.IsNaN(imagValue) {
p := len(two) - len("NaNi)") - 1
if two[p] == ' ' {
two = two[:p] + "+" + two[p+1:]
} else {
two = two[:p+1] + "+" + two[p+1:]
}
}
if one != two {
t.Error(f, one, two)
}
}
}
}
}
}
}
}
type SE []interface{} // slice of empty; notational compactness.
var reorderTests = []struct {
format string
args SE
out string
}{
{"%[1]d", SE{1}, "1"},
{"%[2]d", SE{2, 1}, "1"},
{"%[2]d %[1]d", SE{1, 2}, "2 1"},
{"%[2]*[1]d", SE{2, 5}, " 2"},
{"%6.2f", SE{12.0}, " 12.00"}, // Explicit version of next line.
{"%[3]*.[2]*[1]f", SE{12.0, 2, 6}, " 12.00"},
{"%[1]*.[2]*[3]f", SE{6, 2, 12.0}, " 12.00"},
{"%10f", SE{12.0}, " 12.000000"},
{"%[1]*[3]f", SE{10, 99, 12.0}, " 12.000000"},
{"%.6f", SE{12.0}, "12.000000"}, // Explicit version of next line.
{"%.[1]*[3]f", SE{6, 99, 12.0}, "12.000000"},
{"%6.f", SE{12.0}, " 12"}, // // Explicit version of next line; empty precision means zero.
{"%[1]*.[3]f", SE{6, 3, 12.0}, " 12"},
// An actual use! Print the same arguments twice.
{"%d %d %d %#[1]o %#o %#o", SE{11, 12, 13}, "11 12 13 013 014 015"},
// Erroneous cases.
{"%[d", SE{2, 1}, "%!d(BADINDEX)"},
{"%]d", SE{2, 1}, "%!](int=2)d%!(EXTRA int=1)"},
{"%[]d", SE{2, 1}, "%!d(BADINDEX)"},
{"%[-3]d", SE{2, 1}, "%!d(BADINDEX)"},
{"%[99]d", SE{2, 1}, "%!d(BADINDEX)"},
{"%[3]", SE{2, 1}, "%!(NOVERB)"},
{"%[1].2d", SE{5, 6}, "%!d(BADINDEX)"},
{"%[1]2d", SE{2, 1}, "%!d(BADINDEX)"},
{"%3.[2]d", SE{7}, "%!d(BADINDEX)"},
{"%.[2]d", SE{7}, "%!d(BADINDEX)"},
{"%d %d %d %#[1]o %#o %#o %#o", SE{11, 12, 13}, "11 12 13 013 014 015 %!o(MISSING)"},
{"%[5]d %[2]d %d", SE{1, 2, 3}, "%!d(BADINDEX) 2 3"},
{"%d %[3]d %d", SE{1, 2}, "1 %!d(BADINDEX) 2"}, // Erroneous index does not affect sequence.
{"%.[]", SE{}, "%!](BADINDEX)"}, // Issue 10675
{"%.-3d", SE{42}, "%!-(int=42)3d"}, // TODO: Should this set return better error messages?
// The following messages are interpreted as if there is no substitution,
// in which case it is okay to have extra arguments. This is different
// semantics from the fmt package.
{"%2147483648d", SE{42}, "%!(NOVERB)"},
{"%-2147483648d", SE{42}, "%!(NOVERB)"},
{"%.2147483648d", SE{42}, "%!(NOVERB)"},
}
func TestReorder(t *testing.T) {
p := NewPrinter(language.Und)
for _, tc := range reorderTests {
t.Run(fmt.Sprint(tc.format, "/", tc.args), func(t *testing.T) {
s := p.Sprintf(tc.format, tc.args...)
if s != tc.out {
t.Errorf("Sprintf(%q, %v) = %q want %q", tc.format, tc.args, s, tc.out)
}
})
}
}
func BenchmarkSprintfPadding(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%16f", 1.0)
}
})
}
func BenchmarkSprintfEmpty(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("")
}
})
}
func BenchmarkSprintfString(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%s", "hello")
}
})
}
func BenchmarkSprintfTruncateString(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%.3s", "日本語日本語日本語")
}
})
}
func BenchmarkSprintfQuoteString(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%q", "日本語日本語日本語")
}
})
}
func BenchmarkSprintfInt(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%d", 5)
}
})
}
func BenchmarkSprintfIntInt(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%d %d", 5, 6)
}
})
}
func BenchmarkSprintfPrefixedInt(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("This is some meaningless prefix text that needs to be scanned %d", 6)
}
})
}
func BenchmarkSprintfFloat(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%g", 5.23184)
}
})
}
func BenchmarkSprintfComplex(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%f", 5.23184+5.23184i)
}
})
}
func BenchmarkSprintfBoolean(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%t", true)
}
})
}
func BenchmarkSprintfHexString(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("% #x", "0123456789abcdef")
}
})
}
func BenchmarkSprintfHexBytes(b *testing.B) {
data := []byte("0123456789abcdef")
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("% #x", data)
}
})
}
func BenchmarkSprintfBytes(b *testing.B) {
data := []byte("0123456789abcdef")
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%v", data)
}
})
}
func BenchmarkSprintfStringer(b *testing.B) {
stringer := I(12345)
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%v", stringer)
}
})
}
func BenchmarkSprintfStructure(b *testing.B) {
s := &[]interface{}{SI{12345}, map[int]string{0: "hello"}}
b.RunParallel(func(pb *testing.PB) {
p := NewPrinter(language.English)
for pb.Next() {
p.Sprintf("%#v", s)
}
})
}
func BenchmarkManyArgs(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
var buf bytes.Buffer
p := NewPrinter(language.English)
for pb.Next() {
buf.Reset()
p.Fprintf(&buf, "%2d/%2d/%2d %d:%d:%d %s %s\n", 3, 4, 5, 11, 12, 13, "hello", "world")
}
})
}
func BenchmarkFprintInt(b *testing.B) {
var buf bytes.Buffer
p := NewPrinter(language.English)
for i := 0; i < b.N; i++ {
buf.Reset()
p.Fprint(&buf, 123456)
}
}
func BenchmarkFprintfBytes(b *testing.B) {
data := []byte(string("0123456789"))
var buf bytes.Buffer
p := NewPrinter(language.English)
for i := 0; i < b.N; i++ {
buf.Reset()
p.Fprintf(&buf, "%s", data)
}
}
func BenchmarkFprintIntNoAlloc(b *testing.B) {
var x interface{} = 123456
var buf bytes.Buffer
p := NewPrinter(language.English)
for i := 0; i < b.N; i++ {
buf.Reset()
p.Fprint(&buf, x)
}
}
var mallocBuf bytes.Buffer
var mallocPointer *int // A pointer so we know the interface value won't allocate.
var mallocTest = []struct {
count int
desc string
fn func(p *Printer)
}{
{0, `Sprintf("")`, func(p *Printer) { p.Sprintf("") }},
{1, `Sprintf("xxx")`, func(p *Printer) { p.Sprintf("xxx") }},
{2, `Sprintf("%x")`, func(p *Printer) { p.Sprintf("%x", 7) }},
{2, `Sprintf("%s")`, func(p *Printer) { p.Sprintf("%s", "hello") }},
{3, `Sprintf("%x %x")`, func(p *Printer) { p.Sprintf("%x %x", 7, 112) }},
{2, `Sprintf("%g")`, func(p *Printer) { p.Sprintf("%g", float32(3.14159)) }}, // TODO: Can this be 1?
{1, `Fprintf(buf, "%s")`, func(p *Printer) { mallocBuf.Reset(); p.Fprintf(&mallocBuf, "%s", "hello") }},
// If the interface value doesn't need to allocate, amortized allocation overhead should be zero.
{0, `Fprintf(buf, "%x %x %x")`, func(p *Printer) {
mallocBuf.Reset()
p.Fprintf(&mallocBuf, "%x %x %x", mallocPointer, mallocPointer, mallocPointer)
}},
}
var _ bytes.Buffer
func TestCountMallocs(t *testing.T) {
switch {
case testing.Short():
t.Skip("skipping malloc count in short mode")
case runtime.GOMAXPROCS(0) > 1:
t.Skip("skipping; GOMAXPROCS>1")
// TODO: detect race detecter enabled.
// case race.Enabled:
// t.Skip("skipping malloc count under race detector")
}
p := NewPrinter(language.English)
for _, mt := range mallocTest {
mallocs := testing.AllocsPerRun(100, func() { mt.fn(p) })
if got, max := mallocs, float64(mt.count); got > max {
t.Errorf("%s: got %v allocs, want <=%v", mt.desc, got, max)
}
}
}
type flagPrinter struct{}
func (flagPrinter) Format(f fmt.State, c rune) {
s := "%"
for i := 0; i < 128; i++ {
if f.Flag(i) {
s += string(i)
}
}
if w, ok := f.Width(); ok {
s += fmt.Sprintf("%d", w)
}
if p, ok := f.Precision(); ok {
s += fmt.Sprintf(".%d", p)
}
s += string(c)
io.WriteString(f, "["+s+"]")
}
var flagtests = []struct {
in string
out string
}{
{"%a", "[%a]"},
{"%-a", "[%-a]"},
{"%+a", "[%+a]"},
{"%#a", "[%#a]"},
{"% a", "[% a]"},
{"%0a", "[%0a]"},
{"%1.2a", "[%1.2a]"},
{"%-1.2a", "[%-1.2a]"},
{"%+1.2a", "[%+1.2a]"},
{"%-+1.2a", "[%+-1.2a]"},
{"%-+1.2abc", "[%+-1.2a]bc"},
{"%-1.2abc", "[%-1.2a]bc"},
}
func TestFlagParser(t *testing.T) {
var flagprinter flagPrinter
for _, tt := range flagtests {
s := NewPrinter(language.Und).Sprintf(tt.in, &flagprinter)
if s != tt.out {
t.Errorf("Sprintf(%q, &flagprinter) => %q, want %q", tt.in, s, tt.out)
}
}
}
func TestStructPrinter(t *testing.T) {
type T struct {
a string
b string
c int
}
var s T
s.a = "abc"
s.b = "def"
s.c = 123
var tests = []struct {
fmt string
out string
}{
{"%v", "{abc def 123}"},
{"%+v", "{a:abc b:def c:123}"},
{"%#v", `message.T{a:"abc", b:"def", c:123}`},
}
p := NewPrinter(language.Und)
for _, tt := range tests {
out := p.Sprintf(tt.fmt, s)
if out != tt.out {
t.Errorf("Sprintf(%q, s) = %#q, want %#q", tt.fmt, out, tt.out)
}
// The same but with a pointer.
out = p.Sprintf(tt.fmt, &s)
if out != "&"+tt.out {
t.Errorf("Sprintf(%q, &s) = %#q, want %#q", tt.fmt, out, "&"+tt.out)
}
}
}
func TestSlicePrinter(t *testing.T) {
p := NewPrinter(language.Und)
slice := []int{}
s := p.Sprint(slice)
if s != "[]" {
t.Errorf("empty slice printed as %q not %q", s, "[]")
}
slice = []int{1, 2, 3}
s = p.Sprint(slice)
if s != "[1 2 3]" {
t.Errorf("slice: got %q expected %q", s, "[1 2 3]")
}
s = p.Sprint(&slice)
if s != "&[1 2 3]" {
t.Errorf("&slice: got %q expected %q", s, "&[1 2 3]")
}
}
// presentInMap checks map printing using substrings so we don't depend on the
// print order.
func presentInMap(s string, a []string, t *testing.T) {
for i := 0; i < len(a); i++ {
loc := strings.Index(s, a[i])
if loc < 0 {
t.Errorf("map print: expected to find %q in %q", a[i], s)
}
// make sure the match ends here
loc += len(a[i])
if loc >= len(s) || (s[loc] != ' ' && s[loc] != ']') {
t.Errorf("map print: %q not properly terminated in %q", a[i], s)
}
}
}
func TestMapPrinter(t *testing.T) {
p := NewPrinter(language.Und)
m0 := make(map[int]string)
s := p.Sprint(m0)
if s != "map[]" {
t.Errorf("empty map printed as %q not %q", s, "map[]")
}
m1 := map[int]string{1: "one", 2: "two", 3: "three"}
a := []string{"1:one", "2:two", "3:three"}
presentInMap(p.Sprintf("%v", m1), a, t)
presentInMap(p.Sprint(m1), a, t)
// Pointer to map prints the same but with initial &.
if !strings.HasPrefix(p.Sprint(&m1), "&") {
t.Errorf("no initial & for address of map")
}
presentInMap(p.Sprintf("%v", &m1), a, t)
presentInMap(p.Sprint(&m1), a, t)
}
func TestEmptyMap(t *testing.T) {
const emptyMapStr = "map[]"
var m map[string]int
p := NewPrinter(language.Und)
s := p.Sprint(m)
if s != emptyMapStr {
t.Errorf("nil map printed as %q not %q", s, emptyMapStr)
}
m = make(map[string]int)
s = p.Sprint(m)
if s != emptyMapStr {
t.Errorf("empty map printed as %q not %q", s, emptyMapStr)
}
}
// TestBlank checks that Sprint (and hence Print, Fprint) puts spaces in the
// right places, that is, between arg pairs in which neither is a string.
func TestBlank(t *testing.T) {
p := NewPrinter(language.Und)
got := p.Sprint("<", 1, ">:", 1, 2, 3, "!")
expect := "<1>:1 2 3!"
if got != expect {
t.Errorf("got %q expected %q", got, expect)
}
}
// TestBlankln checks that Sprintln (and hence Println, Fprintln) puts spaces in
// the right places, that is, between all arg pairs.
func TestBlankln(t *testing.T) {
p := NewPrinter(language.Und)
got := p.Sprintln("<", 1, ">:", 1, 2, 3, "!")
expect := "< 1 >: 1 2 3 !\n"
if got != expect {
t.Errorf("got %q expected %q", got, expect)
}
}
// TestFormatterPrintln checks Formatter with Sprint, Sprintln, Sprintf.
func TestFormatterPrintln(t *testing.T) {
p := NewPrinter(language.Und)
f := F(1)
expect := "<v=F(1)>\n"
s := p.Sprint(f, "\n")
if s != expect {
t.Errorf("Sprint wrong with Formatter: expected %q got %q", expect, s)
}
s = p.Sprintln(f)
if s != expect {
t.Errorf("Sprintln wrong with Formatter: expected %q got %q", expect, s)
}
s = p.Sprintf("%v\n", f)
if s != expect {
t.Errorf("Sprintf wrong with Formatter: expected %q got %q", expect, s)
}
}
func args(a ...interface{}) []interface{} { return a }
var startests = []struct {
fmt string
in []interface{}
out string
}{
{"%*d", args(4, 42), " 42"},
{"%-*d", args(4, 42), "42 "},
{"%*d", args(-4, 42), "42 "},
{"%-*d", args(-4, 42), "42 "},
{"%.*d", args(4, 42), "0,042"},
{"%*.*d", args(8, 4, 42), " 0,042"},
{"%0*d", args(4, 42), "0,042"},
// Some non-int types for width. (Issue 10732).
{"%0*d", args(uint(4), 42), "0,042"},
{"%0*d", args(uint64(4), 42), "0,042"},
{"%0*d", args('\x04', 42), "0,042"},
{"%0*d", args(uintptr(4), 42), "0,042"},
// erroneous
{"%*d", args(nil, 42), "%!(BADWIDTH)42"},
{"%*d", args(int(1e7), 42), "%!(BADWIDTH)42"},
{"%*d", args(int(-1e7), 42), "%!(BADWIDTH)42"},
{"%.*d", args(nil, 42), "%!(BADPREC)42"},
{"%.*d", args(-1, 42), "%!(BADPREC)42"},
{"%.*d", args(int(1e7), 42), "%!(BADPREC)42"},
{"%.*d", args(uint(1e7), 42), "%!(BADPREC)42"},
{"%.*d", args(uint64(1<<63), 42), "%!(BADPREC)42"}, // Huge negative (-inf).
{"%.*d", args(uint64(1<<64-1), 42), "%!(BADPREC)42"}, // Small negative (-1).
{"%*d", args(5, "foo"), "%!d(string= foo)"},
{"%*% %d", args(20, 5), "% 5"},
{"%*", args(4), "%!(NOVERB)"},
}
func TestWidthAndPrecision(t *testing.T) {
p := NewPrinter(language.Und)
for i, tt := range startests {
t.Run(fmt.Sprint(tt.fmt, tt.in), func(t *testing.T) {
s := p.Sprintf(tt.fmt, tt.in...)
if s != tt.out {
t.Errorf("#%d: %q: got %q expected %q", i, tt.fmt, s, tt.out)
}
})
}
}
// PanicS is a type that panics in String.
type PanicS struct {
message interface{}
}
// Value receiver.
func (p PanicS) String() string {
panic(p.message)
}
// PanicGo is a type that panics in GoString.
type PanicGo struct {
message interface{}
}
// Value receiver.
func (p PanicGo) GoString() string {
panic(p.message)
}
// PanicF is a type that panics in Format.
type PanicF struct {
message interface{}
}
// Value receiver.
func (p PanicF) Format(f fmt.State, c rune) {
panic(p.message)
}
var panictests = []struct {
desc string
fmt string
in interface{}
out string
}{
// String
{"String", "%s", (*PanicS)(nil), "<nil>"}, // nil pointer special case
{"String", "%s", PanicS{io.ErrUnexpectedEOF}, "%!s(PANIC=unexpected EOF)"},
{"String", "%s", PanicS{3}, "%!s(PANIC=3)"},
// GoString
{"GoString", "%#v", (*PanicGo)(nil), "<nil>"}, // nil pointer special case
{"GoString", "%#v", PanicGo{io.ErrUnexpectedEOF}, "%!v(PANIC=unexpected EOF)"},
{"GoString", "%#v", PanicGo{3}, "%!v(PANIC=3)"},
// Issue 18282. catchPanic should not clear fmtFlags permanently.
{"Issue 18282", "%#v", []interface{}{PanicGo{3}, PanicGo{3}}, "[]interface {}{%!v(PANIC=3), %!v(PANIC=3)}"},
// Format
{"Format", "%s", (*PanicF)(nil), "<nil>"}, // nil pointer special case
{"Format", "%s", PanicF{io.ErrUnexpectedEOF}, "%!s(PANIC=unexpected EOF)"},
{"Format", "%s", PanicF{3}, "%!s(PANIC=3)"},
}
func TestPanics(t *testing.T) {
p := NewPrinter(language.Und)
for i, tt := range panictests {
t.Run(fmt.Sprint(tt.desc, "/", tt.fmt, "/", tt.in), func(t *testing.T) {
s := p.Sprintf(tt.fmt, tt.in)
if s != tt.out {
t.Errorf("%d: %q: got %q expected %q", i, tt.fmt, s, tt.out)
}
})
}
}
// recurCount tests that erroneous String routine doesn't cause fatal recursion.
var recurCount = 0
type Recur struct {
i int
failed *bool
}
func (r *Recur) String() string {
p := NewPrinter(language.Und)
if recurCount++; recurCount > 10 {
*r.failed = true
return "FAIL"
}
// This will call badVerb. Before the fix, that would cause us to recur into
// this routine to print %!p(value). Now we don't call the user's method
// during an error.
return p.Sprintf("recur@%p value: %d", r, r.i)
}
func TestBadVerbRecursion(t *testing.T) {
p := NewPrinter(language.Und)
failed := false
r := &Recur{3, &failed}
p.Sprintf("recur@%p value: %d\n", &r, r.i)
if failed {
t.Error("fail with pointer")
}
failed = false
r = &Recur{4, &failed}
p.Sprintf("recur@%p, value: %d\n", r, r.i)
if failed {
t.Error("fail with value")
}
}
func TestNilDoesNotBecomeTyped(t *testing.T) {
p := NewPrinter(language.Und)
type A struct{}
type B struct{}
var a *A = nil
var b B = B{}
// indirect the Sprintf call through this noVetWarn variable to avoid
// "go test" failing vet checks in Go 1.10+.
noVetWarn := p.Sprintf
got := noVetWarn("%s %s %s %s %s", nil, a, nil, b, nil)
const expect = "%!s(<nil>) %!s(*message.A=<nil>) %!s(<nil>) {} %!s(<nil>)"
if got != expect {
t.Errorf("expected:\n\t%q\ngot:\n\t%q", expect, got)
}
}
var formatterFlagTests = []struct {
in string
val interface{}
out string
}{
// scalar values with the (unused by fmt) 'a' verb.
{"%a", flagPrinter{}, "[%a]"},
{"%-a", flagPrinter{}, "[%-a]"},
{"%+a", flagPrinter{}, "[%+a]"},
{"%#a", flagPrinter{}, "[%#a]"},
{"% a", flagPrinter{}, "[% a]"},
{"%0a", flagPrinter{}, "[%0a]"},
{"%1.2a", flagPrinter{}, "[%1.2a]"},
{"%-1.2a", flagPrinter{}, "[%-1.2a]"},
{"%+1.2a", flagPrinter{}, "[%+1.2a]"},
{"%-+1.2a", flagPrinter{}, "[%+-1.2a]"},
{"%-+1.2abc", flagPrinter{}, "[%+-1.2a]bc"},
{"%-1.2abc", flagPrinter{}, "[%-1.2a]bc"},
// composite values with the 'a' verb
{"%a", [1]flagPrinter{}, "[[%a]]"},
{"%-a", [1]flagPrinter{}, "[[%-a]]"},
{"%+a", [1]flagPrinter{}, "[[%+a]]"},
{"%#a", [1]flagPrinter{}, "[[%#a]]"},
{"% a", [1]flagPrinter{}, "[[% a]]"},
{"%0a", [1]flagPrinter{}, "[[%0a]]"},
{"%1.2a", [1]flagPrinter{}, "[[%1.2a]]"},
{"%-1.2a", [1]flagPrinter{}, "[[%-1.2a]]"},
{"%+1.2a", [1]flagPrinter{}, "[[%+1.2a]]"},
{"%-+1.2a", [1]flagPrinter{}, "[[%+-1.2a]]"},
{"%-+1.2abc", [1]flagPrinter{}, "[[%+-1.2a]]bc"},
{"%-1.2abc", [1]flagPrinter{}, "[[%-1.2a]]bc"},
// simple values with the 'v' verb
{"%v", flagPrinter{}, "[%v]"},
{"%-v", flagPrinter{}, "[%-v]"},
{"%+v", flagPrinter{}, "[%+v]"},
{"%#v", flagPrinter{}, "[%#v]"},
{"% v", flagPrinter{}, "[% v]"},
{"%0v", flagPrinter{}, "[%0v]"},
{"%1.2v", flagPrinter{}, "[%1.2v]"},
{"%-1.2v", flagPrinter{}, "[%-1.2v]"},
{"%+1.2v", flagPrinter{}, "[%+1.2v]"},
{"%-+1.2v", flagPrinter{}, "[%+-1.2v]"},
{"%-+1.2vbc", flagPrinter{}, "[%+-1.2v]bc"},
{"%-1.2vbc", flagPrinter{}, "[%-1.2v]bc"},
// composite values with the 'v' verb.
{"%v", [1]flagPrinter{}, "[[%v]]"},
{"%-v", [1]flagPrinter{}, "[[%-v]]"},
{"%+v", [1]flagPrinter{}, "[[%+v]]"},
{"%#v", [1]flagPrinter{}, "[1]message.flagPrinter{[%#v]}"},
{"% v", [1]flagPrinter{}, "[[% v]]"},
{"%0v", [1]flagPrinter{}, "[[%0v]]"},
{"%1.2v", [1]flagPrinter{}, "[[%1.2v]]"},
{"%-1.2v", [1]flagPrinter{}, "[[%-1.2v]]"},
{"%+1.2v", [1]flagPrinter{}, "[[%+1.2v]]"},
{"%-+1.2v", [1]flagPrinter{}, "[[%+-1.2v]]"},
{"%-+1.2vbc", [1]flagPrinter{}, "[[%+-1.2v]]bc"},
{"%-1.2vbc", [1]flagPrinter{}, "[[%-1.2v]]bc"},
}
func TestFormatterFlags(t *testing.T) {
p := NewPrinter(language.Und)
for _, tt := range formatterFlagTests {
s := p.Sprintf(tt.in, tt.val)
if s != tt.out {
t.Errorf("Sprintf(%q, %T) = %q, want %q", tt.in, tt.val, s, tt.out)
}
}
}
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