pkgpath_test.go

Documentation: cmd/internal/pkgpath

     1  // Copyright 2020 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 pkgpath
     6  
     7  import (
     8  	"internal/testenv"
     9  	"os"
    10  	"testing"
    11  )
    12  
    13  const testEnvName = "GO_PKGPATH_TEST_COMPILER"
    14  
    15  // This init function supports TestToSymbolFunc. For simplicity,
    16  // we use the test binary itself as a sample gccgo driver.
    17  // We set an environment variable to specify how it should behave.
    18  func init() {
    19  	switch os.Getenv(testEnvName) {
    20  	case "":
    21  		return
    22  	case "v1":
    23  		os.Stdout.WriteString(`.string	"go.l__ufer.Run"`)
    24  		os.Exit(0)
    25  	case "v2":
    26  		os.Stdout.WriteString(`.string	"go.l..u00e4ufer.Run"`)
    27  		os.Exit(0)
    28  	case "v3":
    29  		os.Stdout.WriteString(`.string	"go_0l_u00e4ufer.Run"`)
    30  		os.Exit(0)
    31  	case "error":
    32  		os.Stdout.WriteString(`unknown string`)
    33  		os.Exit(0)
    34  	}
    35  }
    36  
    37  func TestToSymbolFunc(t *testing.T) {
    38  	testenv.MustHaveExec(t)
    39  
    40  	const input = "pä世🜃"
    41  	tests := []struct {
    42  		env     string
    43  		fail    bool
    44  		mangled string
    45  	}{
    46  		{
    47  			env:     "v1",
    48  			mangled: "p___",
    49  		},
    50  		{
    51  			env:     "v2",
    52  			mangled: "p..u00e4..u4e16..U0001f703",
    53  		},
    54  		{
    55  			env:     "v3",
    56  			mangled: "p_u00e4_u4e16_U0001f703",
    57  		},
    58  		{
    59  			env:  "error",
    60  			fail: true,
    61  		},
    62  	}
    63  
    64  	cmd := os.Args[0]
    65  	tmpdir := t.TempDir()
    66  
    67  	defer os.Unsetenv(testEnvName)
    68  
    69  	for _, test := range tests {
    70  		t.Run(test.env, func(t *testing.T) {
    71  			os.Setenv(testEnvName, test.env)
    72  
    73  			fn, err := ToSymbolFunc(cmd, tmpdir)
    74  			if err != nil {
    75  				if !test.fail {
    76  					t.Errorf("ToSymbolFunc(%q, %q): unexpected error %v", cmd, tmpdir, err)
    77  				}
    78  			} else if test.fail {
    79  				t.Errorf("ToSymbolFunc(%q, %q) succeeded but expected to fail", cmd, tmpdir)
    80  			} else if got, want := fn(input), test.mangled; got != want {
    81  				t.Errorf("ToSymbolFunc(%q, %q)(%q) = %q, want %q", cmd, tmpdir, input, got, want)
    82  			}
    83  		})
    84  	}
    85  }
    86  
    87  var symbolTests = []struct {
    88  	input, v1, v2, v3 string
    89  }{
    90  	{
    91  		"",
    92  		"",
    93  		"",
    94  		"",
    95  	},
    96  	{
    97  		"bytes",
    98  		"bytes",
    99  		"bytes",
   100  		"bytes",
   101  	},
   102  	{
   103  		"net/http",
   104  		"net_http",
   105  		"net..z2fhttp",
   106  		"net_1http",
   107  	},
   108  	{
   109  		"golang.org/x/net/http",
   110  		"golang_org_x_net_http",
   111  		"golang.x2eorg..z2fx..z2fnet..z2fhttp",
   112  		"golang_0org_1x_1net_1http",
   113  	},
   114  	{
   115  		"pä世.🜃",
   116  		"p____",
   117  		"p..u00e4..u4e16.x2e..U0001f703",
   118  		"p_u00e4_u4e16_0_U0001f703",
   119  	},
   120  }
   121  
   122  func TestV1(t *testing.T) {
   123  	for _, test := range symbolTests {
   124  		if got, want := toSymbolV1(test.input), test.v1; got != want {
   125  			t.Errorf("toSymbolV1(%q) = %q, want %q", test.input, got, want)
   126  		}
   127  	}
   128  }
   129  
   130  func TestV2(t *testing.T) {
   131  	for _, test := range symbolTests {
   132  		if got, want := toSymbolV2(test.input), test.v2; got != want {
   133  			t.Errorf("toSymbolV2(%q) = %q, want %q", test.input, got, want)
   134  		}
   135  	}
   136  }
   137  
   138  func TestV3(t *testing.T) {
   139  	for _, test := range symbolTests {
   140  		if got, want := toSymbolV3(test.input), test.v3; got != want {
   141  			t.Errorf("toSymbolV3(%q) = %q, want %q", test.input, got, want)
   142  		}
   143  	}
   144  }
   145
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