go errorcalls_test 源码
golang errorcalls_test 代码
文件路径：/src/cmd/compile/internal/types2/errorcalls_test.go
// Copyright 2021 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 ast.
package types2_test
import (
"cmd/compile/internal/syntax"
"testing"
)
// TestErrorCalls makes sure that check.errorf calls have at
// least 3 arguments (otherwise we should be using check.error).
func TestErrorCalls(t *testing.T) {
files, err := pkgFiles(".")
if err != nil {
t.Fatal(err)
}
for _, file := range files {
syntax.Crawl(file, func(n syntax.Node) bool {
call, _ := n.(*syntax.CallExpr)
if call == nil {
return false
}
selx, _ := call.Fun.(*syntax.SelectorExpr)
if selx == nil {
return false
}
if !(isName(selx.X, "check") && isName(selx.Sel, "errorf")) {
return false
}
// check.errorf calls should have more than 2 arguments:
// position, format string, and arguments to format
if n := len(call.ArgList); n <= 2 {
t.Errorf("%s: got %d arguments, want > 2", call.Pos(), n)
return true
}
return false
})
}
}
func isName(n syntax.Node, name string) bool {
if n, ok := n.(*syntax.Name); ok {
return n.Value == name
}
return false
}
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