neo-go/pkg/compiler/return_test.go
2020-05-06 18:15:52 +03:00

117 lines
1.9 KiB
Go

package compiler_test
import (
"fmt"
"math/big"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestMultipleReturn1(t *testing.T) {
src := `
package hello
func two() (int, int) {
return 5, 9
}
func Main() int {
a, _ := two()
return a
}
`
eval(t, src, big.NewInt(5))
}
func TestMultipleReturn2(t *testing.T) {
src := `
package hello
func two() (int, int) {
return 5, 9
}
func Main() int {
_, b := two()
return b
}
`
eval(t, src, big.NewInt(9))
}
func TestMultipleReturnUnderscore(t *testing.T) {
src := `
package hello
func f3() (int, int, int) {
return 5, 6, 7
}
func Main() int {
a, _, c := f3()
return a+c
}
`
eval(t, src, big.NewInt(12))
}
func TestMultipleReturnWithArg(t *testing.T) {
src := `
package hello
func inc2(a int) (int, int) {
return a+1, a+2
}
func Main() int {
a, b := 3, 9
a, b = inc2(a)
return a+b
}
`
eval(t, src, big.NewInt(9))
}
func TestSingleReturn(t *testing.T) {
src := `
package hello
func inc(k int) int {
return k+1
}
func Main() int {
a, b := inc(3), inc(4)
return a+b
}
`
eval(t, src, big.NewInt(9))
}
func TestNamedReturn(t *testing.T) {
src := `package foo
func Main() (a int, b int) {
a = 1
b = 2
c := 3
_ = c
return %s
}`
runCase := func(ret string, result ...interface{}) func(t *testing.T) {
return func(t *testing.T) {
src := fmt.Sprintf(src, ret)
v := vmAndCompile(t, src)
require.NoError(t, v.Run())
require.Equal(t, len(result), v.Estack().Len())
for i := range result {
assert.EqualValues(t, result[i], v.Estack().Pop().Value())
}
}
}
t.Run("NormalReturn", runCase("a, b", big.NewInt(1), big.NewInt(2)))
t.Run("EmptyReturn", runCase("", big.NewInt(1), big.NewInt(2)))
t.Run("AnotherVariable", runCase("b, c", big.NewInt(2), big.NewInt(3)))
}