go example 源码
golang example 代码
文件路径：/src/testing/example.go
// Copyright 2009 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.
package testing
import (
"fmt"
"os"
"sort"
"strings"
"time"
)
type InternalExample struct {
Name string
F func()
Output string
Unordered bool
}
// RunExamples is an internal function but exported because it is cross-package;
// it is part of the implementation of the "go test" command.
func RunExamples(matchString func(pat, str string) (bool, error), examples []InternalExample) (ok bool) {
_, ok = runExamples(matchString, examples)
return ok
}
func runExamples(matchString func(pat, str string) (bool, error), examples []InternalExample) (ran, ok bool) {
ok = true
var eg InternalExample
for _, eg = range examples {
matched, err := matchString(*match, eg.Name)
if err != nil {
fmt.Fprintf(os.Stderr, "testing: invalid regexp for -test.run: %s\n", err)
os.Exit(1)
}
if !matched {
continue
}
ran = true
if !runExample(eg) {
ok = false
}
}
return ran, ok
}
func sortLines(output string) string {
lines := strings.Split(output, "\n")
sort.Strings(lines)
return strings.Join(lines, "\n")
}
// processRunResult computes a summary and status of the result of running an example test.
// stdout is the captured output from stdout of the test.
// recovered is the result of invoking recover after running the test, in case it panicked.
//
// If stdout doesn't match the expected output or if recovered is non-nil, it'll print the cause of failure to stdout.
// If the test is chatty/verbose, it'll print a success message to stdout.
// If recovered is non-nil, it'll panic with that value.
// If the test panicked with nil, or invoked runtime.Goexit, it'll be
// made to fail and panic with errNilPanicOrGoexit
func (eg *InternalExample) processRunResult(stdout string, timeSpent time.Duration, finished bool, recovered any) (passed bool) {
passed = true
dstr := fmtDuration(timeSpent)
var fail string
got := strings.TrimSpace(stdout)
want := strings.TrimSpace(eg.Output)
if eg.Unordered {
if sortLines(got) != sortLines(want) && recovered == nil {
fail = fmt.Sprintf("got:\n%s\nwant (unordered):\n%s\n", stdout, eg.Output)
}
} else {
if got != want && recovered == nil {
fail = fmt.Sprintf("got:\n%s\nwant:\n%s\n", got, want)
}
}
if fail != "" || !finished || recovered != nil {
fmt.Printf("--- FAIL: %s (%s)\n%s", eg.Name, dstr, fail)
passed = false
} else if *chatty {
fmt.Printf("--- PASS: %s (%s)\n", eg.Name, dstr)
}
if recovered != nil {
// Propagate the previously recovered result, by panicking.
panic(recovered)
}
if !finished && recovered == nil {
panic(errNilPanicOrGoexit)
}
return
}
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