main_test.go

Documentation: golang.org/x/tools/cmd/bundle

     1  // Copyright 2015 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 main
     6  
     7  import (
     8  	"bytes"
     9  	"os"
    10  	"os/exec"
    11  	"runtime"
    12  	"testing"
    13  
    14  	"golang.org/x/tools/go/packages/packagestest"
    15  )
    16  
    17  func TestBundle(t *testing.T) { packagestest.TestAll(t, testBundle) }
    18  func testBundle(t *testing.T, x packagestest.Exporter) {
    19  	load := func(name string) string {
    20  		data, err := os.ReadFile(name)
    21  		if err != nil {
    22  			t.Fatal(err)
    23  		}
    24  		return string(data)
    25  	}
    26  
    27  	e := packagestest.Export(t, x, []packagestest.Module{
    28  		{
    29  			Name: "initial",
    30  			Files: map[string]interface{}{
    31  				"a.go": load("testdata/src/initial/a.go"),
    32  				"b.go": load("testdata/src/initial/b.go"),
    33  				"c.go": load("testdata/src/initial/c.go"),
    34  			},
    35  		},
    36  		{
    37  			Name: "domain.name/importdecl",
    38  			Files: map[string]interface{}{
    39  				"p.go": load("testdata/src/domain.name/importdecl/p.go"),
    40  			},
    41  		},
    42  	})
    43  	defer e.Cleanup()
    44  	testingOnlyPackagesConfig = e.Config
    45  
    46  	os.Args = os.Args[:1] // avoid e.g. -test=short in the output
    47  	out, err := bundle("initial", "github.com/dest", "dest", "prefix", "tag")
    48  	if err != nil {
    49  		t.Fatal(err)
    50  	}
    51  
    52  	if got, want := string(out), load("testdata/out.golden"); got != want {
    53  		t.Errorf("-- got --\n%s\n-- want --\n%s\n-- diff --", got, want)
    54  
    55  		if err := os.WriteFile("testdata/out.got", out, 0644); err != nil {
    56  			t.Fatal(err)
    57  		}
    58  		t.Log(diff("testdata/out.golden", "testdata/out.got"))
    59  	}
    60  }
    61  
    62  func diff(a, b string) string {
    63  	var cmd *exec.Cmd
    64  	switch runtime.GOOS {
    65  	case "plan9":
    66  		cmd = exec.Command("/bin/diff", "-c", a, b)
    67  	default:
    68  		cmd = exec.Command("/usr/bin/diff", "-u", a, b)
    69  	}
    70  	var out bytes.Buffer
    71  	cmd.Stdout = &out
    72  	cmd.Stderr = &out
    73  	cmd.Run() // nonzero exit is expected
    74  	if out.Len() == 0 {
    75  		return "(failed to compute diff)"
    76  	}
    77  	return out.String()
    78  }
    79
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