life_test.go

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package life_test
     6  
     7  import (
     8  	"bytes"
     9  	"log"
    10  	"os"
    11  	"os/exec"
    12  	"path/filepath"
    13  	"strings"
    14  	"testing"
    15  )
    16  
    17  func TestMain(m *testing.M) {
    18  	log.SetFlags(log.Lshortfile)
    19  	os.Exit(testMain(m))
    20  }
    21  
    22  func testMain(m *testing.M) int {
    23  	GOPATH, err := os.MkdirTemp("", "cgolife")
    24  	if err != nil {
    25  		log.Panic(err)
    26  	}
    27  	defer os.RemoveAll(GOPATH)
    28  	os.Setenv("GOPATH", GOPATH)
    29  
    30  	// Copy testdata into GOPATH/src/cgolife, along with a go.mod file
    31  	// declaring the same path.
    32  	modRoot := filepath.Join(GOPATH, "src", "cgolife")
    33  	if err := overlayDir(modRoot, "testdata"); err != nil {
    34  		log.Panic(err)
    35  	}
    36  	if err := os.Chdir(modRoot); err != nil {
    37  		log.Panic(err)
    38  	}
    39  	os.Setenv("PWD", modRoot)
    40  	if err := os.WriteFile("go.mod", []byte("module cgolife\n"), 0666); err != nil {
    41  		log.Panic(err)
    42  	}
    43  
    44  	return m.Run()
    45  }
    46  
    47  func TestTestRun(t *testing.T) {
    48  	if os.Getenv("GOOS") == "android" {
    49  		t.Skip("the go tool runs with CGO_ENABLED=0 on the android device")
    50  	}
    51  	out, err := exec.Command("go", "env", "GOROOT").Output()
    52  	if err != nil {
    53  		t.Fatal(err)
    54  	}
    55  	GOROOT := string(bytes.TrimSpace(out))
    56  
    57  	cmd := exec.Command("go", "run", filepath.Join(GOROOT, "test", "run.go"), "-", ".")
    58  	out, err = cmd.CombinedOutput()
    59  	if err != nil {
    60  		t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
    61  	}
    62  	t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
    63  }
    64
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