go divbyzero_test 源码
golang divbyzero_test 代码
文件路径：/src/cmd/compile/internal/test/testdata/divbyzero_test.go
package main
import (
"runtime"
"testing"
)
func checkDivByZero(f func()) (divByZero bool) {
defer func() {
if r := recover(); r != nil {
if e, ok := r.(runtime.Error); ok && e.Error() == "runtime error: integer divide by zero" {
divByZero = true
}
}
}()
f()
return false
}
//go:noinline
func div_a(i uint, s []int) int {
return s[i%uint(len(s))]
}
//go:noinline
func div_b(i uint, j uint) uint {
return i / j
}
//go:noinline
func div_c(i int) int {
return 7 / (i - i)
}
func TestDivByZero(t *testing.T) {
if got := checkDivByZero(func() { div_b(7, 0) }); !got {
t.Errorf("expected div by zero for b(7, 0), got no error\n")
}
if got := checkDivByZero(func() { div_b(7, 7) }); got {
t.Errorf("expected no error for b(7, 7), got div by zero\n")
}
if got := checkDivByZero(func() { div_a(4, nil) }); !got {
t.Errorf("expected div by zero for a(4, nil), got no error\n")
}
if got := checkDivByZero(func() { div_c(5) }); !got {
t.Errorf("expected div by zero for c(5), got no error\n")
}
}
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