320 lines
9.4 KiB
Go
320 lines
9.4 KiB
Go
/*
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* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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package spew_test
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"testing"
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"github.com/davecgh/go-spew/spew"
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)
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// spewFunc is used to identify which public function of the spew package or
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// ConfigState a test applies to.
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type spewFunc int
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const (
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fCSFdump spewFunc = iota
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fCSFprint
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fCSFprintf
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fCSFprintln
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fCSPrint
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fCSPrintln
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fCSSdump
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fCSSprint
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fCSSprintf
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fCSSprintln
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fCSErrorf
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fCSNewFormatter
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fErrorf
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fFprint
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fFprintln
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fPrint
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fPrintln
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fSdump
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fSprint
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fSprintf
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fSprintln
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)
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// Map of spewFunc values to names for pretty printing.
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var spewFuncStrings = map[spewFunc]string{
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fCSFdump: "ConfigState.Fdump",
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fCSFprint: "ConfigState.Fprint",
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fCSFprintf: "ConfigState.Fprintf",
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fCSFprintln: "ConfigState.Fprintln",
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fCSSdump: "ConfigState.Sdump",
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fCSPrint: "ConfigState.Print",
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fCSPrintln: "ConfigState.Println",
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fCSSprint: "ConfigState.Sprint",
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fCSSprintf: "ConfigState.Sprintf",
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fCSSprintln: "ConfigState.Sprintln",
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fCSErrorf: "ConfigState.Errorf",
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fCSNewFormatter: "ConfigState.NewFormatter",
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fErrorf: "spew.Errorf",
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fFprint: "spew.Fprint",
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fFprintln: "spew.Fprintln",
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fPrint: "spew.Print",
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fPrintln: "spew.Println",
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fSdump: "spew.Sdump",
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fSprint: "spew.Sprint",
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fSprintf: "spew.Sprintf",
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fSprintln: "spew.Sprintln",
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}
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func (f spewFunc) String() string {
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if s, ok := spewFuncStrings[f]; ok {
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return s
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}
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return fmt.Sprintf("Unknown spewFunc (%d)", int(f))
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}
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// spewTest is used to describe a test to be performed against the public
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// functions of the spew package or ConfigState.
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type spewTest struct {
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cs *spew.ConfigState
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f spewFunc
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format string
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in interface{}
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want string
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}
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// spewTests houses the tests to be performed against the public functions of
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// the spew package and ConfigState.
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//
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// These tests are only intended to ensure the public functions are exercised
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// and are intentionally not exhaustive of types. The exhaustive type
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// tests are handled in the dump and format tests.
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var spewTests []spewTest
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// redirStdout is a helper function to return the standard output from f as a
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// byte slice.
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func redirStdout(f func()) ([]byte, error) {
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tempFile, err := ioutil.TempFile("", "ss-test")
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if err != nil {
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return nil, err
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}
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fileName := tempFile.Name()
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defer os.Remove(fileName) // Ignore error
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origStdout := os.Stdout
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os.Stdout = tempFile
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f()
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os.Stdout = origStdout
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tempFile.Close()
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return ioutil.ReadFile(fileName)
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}
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func initSpewTests() {
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// Config states with various settings.
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scsDefault := spew.NewDefaultConfig()
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scsNoMethods := &spew.ConfigState{Indent: " ", DisableMethods: true}
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scsNoPmethods := &spew.ConfigState{Indent: " ", DisablePointerMethods: true}
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scsMaxDepth := &spew.ConfigState{Indent: " ", MaxDepth: 1}
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scsContinue := &spew.ConfigState{Indent: " ", ContinueOnMethod: true}
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scsNoPtrAddr := &spew.ConfigState{DisablePointerAddresses: true}
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scsNoCap := &spew.ConfigState{DisableCapacities: true}
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// Variables for tests on types which implement Stringer interface with and
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// without a pointer receiver.
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ts := stringer("test")
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tps := pstringer("test")
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type ptrTester struct {
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s *struct{}
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}
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tptr := &ptrTester{s: &struct{}{}}
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// depthTester is used to test max depth handling for structs, array, slices
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// and maps.
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type depthTester struct {
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ic indirCir1
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arr [1]string
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slice []string
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m map[string]int
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}
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dt := depthTester{indirCir1{nil}, [1]string{"arr"}, []string{"slice"},
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map[string]int{"one": 1}}
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// Variable for tests on types which implement error interface.
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te := customError(10)
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spewTests = []spewTest{
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{scsDefault, fCSFdump, "", int8(127), "(int8) 127\n"},
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{scsDefault, fCSFprint, "", int16(32767), "32767"},
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{scsDefault, fCSFprintf, "%v", int32(2147483647), "2147483647"},
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{scsDefault, fCSFprintln, "", int(2147483647), "2147483647\n"},
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{scsDefault, fCSPrint, "", int64(9223372036854775807), "9223372036854775807"},
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{scsDefault, fCSPrintln, "", uint8(255), "255\n"},
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{scsDefault, fCSSdump, "", uint8(64), "(uint8) 64\n"},
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{scsDefault, fCSSprint, "", complex(1, 2), "(1+2i)"},
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{scsDefault, fCSSprintf, "%v", complex(float32(3), 4), "(3+4i)"},
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{scsDefault, fCSSprintln, "", complex(float64(5), 6), "(5+6i)\n"},
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{scsDefault, fCSErrorf, "%#v", uint16(65535), "(uint16)65535"},
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{scsDefault, fCSNewFormatter, "%v", uint32(4294967295), "4294967295"},
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{scsDefault, fErrorf, "%v", uint64(18446744073709551615), "18446744073709551615"},
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{scsDefault, fFprint, "", float32(3.14), "3.14"},
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{scsDefault, fFprintln, "", float64(6.28), "6.28\n"},
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{scsDefault, fPrint, "", true, "true"},
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{scsDefault, fPrintln, "", false, "false\n"},
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{scsDefault, fSdump, "", complex(-10, -20), "(complex128) (-10-20i)\n"},
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{scsDefault, fSprint, "", complex(-1, -2), "(-1-2i)"},
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{scsDefault, fSprintf, "%v", complex(float32(-3), -4), "(-3-4i)"},
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{scsDefault, fSprintln, "", complex(float64(-5), -6), "(-5-6i)\n"},
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{scsNoMethods, fCSFprint, "", ts, "test"},
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{scsNoMethods, fCSFprint, "", &ts, "<*>test"},
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{scsNoMethods, fCSFprint, "", tps, "test"},
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{scsNoMethods, fCSFprint, "", &tps, "<*>test"},
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{scsNoPmethods, fCSFprint, "", ts, "stringer test"},
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{scsNoPmethods, fCSFprint, "", &ts, "<*>stringer test"},
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{scsNoPmethods, fCSFprint, "", tps, "test"},
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{scsNoPmethods, fCSFprint, "", &tps, "<*>stringer test"},
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{scsMaxDepth, fCSFprint, "", dt, "{{<max>} [<max>] [<max>] map[<max>]}"},
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{scsMaxDepth, fCSFdump, "", dt, "(spew_test.depthTester) {\n" +
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" ic: (spew_test.indirCir1) {\n <max depth reached>\n },\n" +
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" arr: ([1]string) (len=1 cap=1) {\n <max depth reached>\n },\n" +
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" slice: ([]string) (len=1 cap=1) {\n <max depth reached>\n },\n" +
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" m: (map[string]int) (len=1) {\n <max depth reached>\n }\n}\n"},
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{scsContinue, fCSFprint, "", ts, "(stringer test) test"},
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{scsContinue, fCSFdump, "", ts, "(spew_test.stringer) " +
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"(len=4) (stringer test) \"test\"\n"},
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{scsContinue, fCSFprint, "", te, "(error: 10) 10"},
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{scsContinue, fCSFdump, "", te, "(spew_test.customError) " +
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"(error: 10) 10\n"},
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{scsNoPtrAddr, fCSFprint, "", tptr, "<*>{<*>{}}"},
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{scsNoPtrAddr, fCSSdump, "", tptr, "(*spew_test.ptrTester)({\ns: (*struct {})({\n})\n})\n"},
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{scsNoCap, fCSSdump, "", make([]string, 0, 10), "([]string) {\n}\n"},
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{scsNoCap, fCSSdump, "", make([]string, 1, 10), "([]string) (len=1) {\n(string) \"\"\n}\n"},
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}
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}
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// TestSpew executes all of the tests described by spewTests.
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func TestSpew(t *testing.T) {
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initSpewTests()
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t.Logf("Running %d tests", len(spewTests))
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for i, test := range spewTests {
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buf := new(bytes.Buffer)
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switch test.f {
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case fCSFdump:
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test.cs.Fdump(buf, test.in)
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case fCSFprint:
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test.cs.Fprint(buf, test.in)
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case fCSFprintf:
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test.cs.Fprintf(buf, test.format, test.in)
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case fCSFprintln:
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test.cs.Fprintln(buf, test.in)
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case fCSPrint:
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b, err := redirStdout(func() { test.cs.Print(test.in) })
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if err != nil {
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t.Errorf("%v #%d %v", test.f, i, err)
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continue
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}
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buf.Write(b)
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case fCSPrintln:
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b, err := redirStdout(func() { test.cs.Println(test.in) })
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if err != nil {
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t.Errorf("%v #%d %v", test.f, i, err)
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continue
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}
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buf.Write(b)
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case fCSSdump:
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str := test.cs.Sdump(test.in)
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buf.WriteString(str)
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case fCSSprint:
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str := test.cs.Sprint(test.in)
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buf.WriteString(str)
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case fCSSprintf:
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str := test.cs.Sprintf(test.format, test.in)
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buf.WriteString(str)
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case fCSSprintln:
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str := test.cs.Sprintln(test.in)
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buf.WriteString(str)
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case fCSErrorf:
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err := test.cs.Errorf(test.format, test.in)
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buf.WriteString(err.Error())
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case fCSNewFormatter:
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fmt.Fprintf(buf, test.format, test.cs.NewFormatter(test.in))
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case fErrorf:
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err := spew.Errorf(test.format, test.in)
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buf.WriteString(err.Error())
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case fFprint:
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spew.Fprint(buf, test.in)
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case fFprintln:
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spew.Fprintln(buf, test.in)
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case fPrint:
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b, err := redirStdout(func() { spew.Print(test.in) })
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if err != nil {
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t.Errorf("%v #%d %v", test.f, i, err)
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continue
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}
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buf.Write(b)
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case fPrintln:
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b, err := redirStdout(func() { spew.Println(test.in) })
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if err != nil {
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t.Errorf("%v #%d %v", test.f, i, err)
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continue
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}
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buf.Write(b)
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case fSdump:
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str := spew.Sdump(test.in)
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buf.WriteString(str)
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case fSprint:
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str := spew.Sprint(test.in)
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buf.WriteString(str)
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case fSprintf:
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str := spew.Sprintf(test.format, test.in)
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buf.WriteString(str)
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case fSprintln:
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str := spew.Sprintln(test.in)
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buf.WriteString(str)
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default:
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t.Errorf("%v #%d unrecognized function", test.f, i)
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continue
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}
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s := buf.String()
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if test.want != s {
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t.Errorf("ConfigState #%d\n got: %s want: %s", i, s, test.want)
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continue
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}
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}
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}
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