mirror of https://github.com/gogs/gogs.git
50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
// Copyright 2020 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package testutil
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import (
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"errors"
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"fmt"
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"os"
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"os/exec"
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"strings"
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)
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// Exec executes "go test" on given helper with supplied environment variables.
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// It is useful to mock "os/exec" functions in tests. When succeeded, it returns
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// the result produced by the test helper.
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// The test helper should:
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// 1. Use WantHelperProcess function to determine if it is being called in helper mode.
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// 2. Call fmt.Fprintln(os.Stdout, ...) to print results for the main test to collect.
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func Exec(helper string, envs ...string) (string, error) {
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cmd := exec.Command(os.Args[0], "-test.run="+helper, "--")
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cmd.Env = []string{
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"GO_WANT_HELPER_PROCESS=1",
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"GOCOVERDIR=" + os.TempDir(),
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}
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cmd.Env = append(cmd.Env, envs...)
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out, err := cmd.CombinedOutput()
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str := string(out)
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// The error is quite confusing even when tests passed, so let's check whether
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// it is passed first.
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if strings.Contains(str, "no tests to run") {
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return "", errors.New("no tests to run")
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} else if i := strings.Index(str, "PASS"); i >= 0 {
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// Collect helper result
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return strings.TrimSpace(str[:i]), nil
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}
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if err != nil {
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return "", fmt.Errorf("%v - %s", err, str)
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}
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return "", errors.New(str)
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}
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// WantHelperProcess returns true if current process is in helper mode.
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func WantHelperProcess() bool {
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return os.Getenv("GO_WANT_HELPER_PROCESS") == "1"
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}
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