chdir_test.go

Documentation: cmd/go

     1  // Copyright 2022 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  	"cmd/go/internal/base"
     9  	"os"
    10  	"strings"
    11  	"testing"
    12  )
    13  
    14  func TestChdir(t *testing.T) {
    15  	// We want -C to apply to every go subcommand.
    16  	// Test that every command either has a -C flag registered
    17  	// or has CustomFlags set. In the latter case, the command
    18  	// must be explicitly tested in TestScript/chdir.
    19  	script, err := os.ReadFile("testdata/script/chdir.txt")
    20  	if err != nil {
    21  		t.Fatal(err)
    22  	}
    23  
    24  	var walk func(string, *base.Command)
    25  	walk = func(name string, cmd *base.Command) {
    26  		if len(cmd.Commands) > 0 {
    27  			for _, sub := range cmd.Commands {
    28  				walk(name+" "+sub.Name(), sub)
    29  			}
    30  			return
    31  		}
    32  		if !cmd.Runnable() {
    33  			return
    34  		}
    35  		if cmd.CustomFlags {
    36  			if !strings.Contains(string(script), "# "+name+"\n") {
    37  				t.Errorf("%s has custom flags, not tested in testdata/script/chdir.txt", name)
    38  			}
    39  			return
    40  		}
    41  		f := cmd.Flag.Lookup("C")
    42  		if f == nil {
    43  			t.Errorf("%s has no -C flag", name)
    44  		} else if f.Usage != "AddChdirFlag" {
    45  			t.Errorf("%s has -C flag but not from AddChdirFlag", name)
    46  		}
    47  	}
    48  	walk("go", base.Go)
    49  }
    50
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