neoneo-go/pkg/compiler/global_test.go

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package compiler_test
import (
"fmt"
"math/big"
"testing"
)
func TestChangeGlobal(t *testing.T) {
src := `package foo
var a int
func Main() int {
setLocal()
set42()
setLocal()
return a
}
func set42() { a = 42 }
func setLocal() { a := 10; _ = a }`
eval(t, src, big.NewInt(42))
}
func TestMultiDeclaration(t *testing.T) {
src := `package foo
var a, b, c int
func Main() int {
a = 1
b = 2
c = 3
return a + b + c
}`
eval(t, src, big.NewInt(6))
}
func TestMultiDeclarationLocal(t *testing.T) {
src := `package foo
func Main() int {
var a, b, c int
a = 1
b = 2
c = 3
return a + b + c
}`
eval(t, src, big.NewInt(6))
}
func TestMultiDeclarationLocalCompound(t *testing.T) {
src := `package foo
func Main() int {
var a, b, c []int
a = append(a, 1)
b = append(b, 2)
c = append(c, 3)
return a[0] + b[0] + c[0]
}`
eval(t, src, big.NewInt(6))
}
func TestShadow(t *testing.T) {
srcTmpl := `package foo
func Main() int {
x := 1
y := 10
%s
x += 1 // increase old local
x := 30 // introduce new local
y += x // make sure is means something
}
return x+y
}`
runCase := func(b string) func(t *testing.T) {
return func(t *testing.T) {
src := fmt.Sprintf(srcTmpl, b)
eval(t, src, big.NewInt(42))
}
}
t.Run("If", runCase("if true {"))
t.Run("For", runCase("for i := 0; i < 1; i++ {"))
t.Run("Range", runCase("for range []int{1} {"))
t.Run("Switch", runCase("switch true {\ncase false: x += 2\ncase true:"))
t.Run("Block", runCase("{"))
}
func TestArgumentLocal(t *testing.T) {
srcTmpl := `package foo
func some(a int) int {
if a > 42 {
a := 24
_ = a
}
return a
}
func Main() int {
return some(%d)
}`
t.Run("Override", func(t *testing.T) {
src := fmt.Sprintf(srcTmpl, 50)
eval(t, src, big.NewInt(50))
})
t.Run("NoOverride", func(t *testing.T) {
src := fmt.Sprintf(srcTmpl, 40)
eval(t, src, big.NewInt(40))
})
}