go short_test 源码
golang short_test 代码
文件路径：/src/cmd/compile/internal/test/testdata/short_test.go
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Tests short circuiting.
package main
import "testing"
func and_ssa(arg1, arg2 bool) bool {
return arg1 && rightCall(arg2)
}
func or_ssa(arg1, arg2 bool) bool {
return arg1 || rightCall(arg2)
}
var rightCalled bool
//go:noinline
func rightCall(v bool) bool {
rightCalled = true
return v
panic("unreached")
}
func testAnd(t *testing.T, arg1, arg2, wantRes bool) {
testShortCircuit(t, "AND", arg1, arg2, and_ssa, arg1, wantRes)
}
func testOr(t *testing.T, arg1, arg2, wantRes bool) {
testShortCircuit(t, "OR", arg1, arg2, or_ssa, !arg1, wantRes)
}
func testShortCircuit(t *testing.T, opName string, arg1, arg2 bool, fn func(bool, bool) bool, wantRightCall, wantRes bool) {
rightCalled = false
got := fn(arg1, arg2)
if rightCalled != wantRightCall {
t.Errorf("failed for %t %s %t; rightCalled=%t want=%t", arg1, opName, arg2, rightCalled, wantRightCall)
}
if wantRes != got {
t.Errorf("failed for %t %s %t; res=%t want=%t", arg1, opName, arg2, got, wantRes)
}
}
// TestShortCircuit tests OANDAND and OOROR expressions and short circuiting.
func TestShortCircuit(t *testing.T) {
testAnd(t, false, false, false)
testAnd(t, false, true, false)
testAnd(t, true, false, false)
testAnd(t, true, true, true)
testOr(t, false, false, false)
testOr(t, false, true, true)
testOr(t, true, false, true)
testOr(t, true, true, true)
}
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