neo-go/pkg/compiler/defer_test.go
Evgeniy Stratonikov b693d54282 compiler: count local variables on the go
Create local variables as they are needed and remove `INITSLOT`
if there were no locals. This helps to eliminate a whole class
of bugs when calculated and real amount mismatched.
2021-05-19 11:50:07 +03:00

150 lines
2.4 KiB
Go

package compiler_test
import (
"math/big"
"testing"
)
func TestDefer(t *testing.T) {
t.Run("Simple", func(t *testing.T) {
src := `package main
var a int
func Main() int {
return h() + a
}
func h() int {
defer f()
return 1
}
func f() { a += 2 }`
eval(t, src, big.NewInt(3))
})
t.Run("ValueUnchanged", func(t *testing.T) {
src := `package main
var a int
func Main() int {
defer f()
a = 3
return a
}
func f() { a += 2 }`
eval(t, src, big.NewInt(3))
})
t.Run("Function", func(t *testing.T) {
src := `package main
var a int
func Main() int {
return h() + a
}
func h() int {
defer f()
a = 3
return g()
}
func g() int {
a++
return a
}
func f() { a += 2 }`
eval(t, src, big.NewInt(10))
})
t.Run("MultipleDefers", func(t *testing.T) {
src := `package main
var a int
func Main() int {
return h() + a
}
func h() int {
defer f()
defer g()
a = 3
return a
}
func g() { a *= 2 }
func f() { a += 2 }`
eval(t, src, big.NewInt(11))
})
t.Run("FunctionLiteral", func(t *testing.T) {
src := `package main
var a int
func Main() int {
return h() + a
}
func h() int {
defer func() {
a = 10
}()
a = 3
return a
}`
eval(t, src, big.NewInt(13))
})
}
func TestRecover(t *testing.T) {
t.Run("Panic", func(t *testing.T) {
src := `package foo
var a int
func Main() int {
return h() + a
}
func h() int {
defer func() {
if r := recover(); r != nil {
a = 3
} else {
a = 4
}
}()
a = 1
panic("msg")
return a
}`
eval(t, src, big.NewInt(3))
})
t.Run("NoPanic", func(t *testing.T) {
src := `package foo
var a int
func Main() int {
return h() + a
}
func h() int {
defer func() {
if r := recover(); r != nil {
a = 3
} else {
a = 4
}
}()
a = 1
return a
}`
eval(t, src, big.NewInt(5))
})
t.Run("PanicInDefer", func(t *testing.T) {
src := `package foo
var a int
func Main() int {
return h() + a
}
func h() int {
defer func() { a += 2; recover() }()
defer func() { a *= 3; recover(); panic("again") }()
a = 1
panic("msg")
return a
}`
eval(t, src, big.NewInt(5))
})
}
func TestDeferNoGlobals(t *testing.T) {
src := `package foo
func Main() int {
a := 1
defer func() { recover() }()
panic("msg")
return a
}`
eval(t, src, big.NewInt(0))
}