| 1 | // Copyright 2013 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 | "fmt" |
| 9 | "go/build" |
| 10 | "io/ioutil" |
| 11 | "os" |
| 12 | "path/filepath" |
| 13 | "runtime" |
| 14 | "strings" |
| 15 | "testing" |
| 16 | ) |
| 17 | |
| 18 | // Unit tests for internal guru functions |
| 19 | |
| 20 | func TestIssue17515(t *testing.T) { |
| 21 | // Tests handling of symlinks in function guessImportPath |
| 22 | // If we have Go code inside $HOME/go/src and create a symlink $HOME/src to it |
| 23 | // there are 4 possible cases that need to be tested: |
| 24 | // (1) absolute & absolute: GOPATH=$HOME/go/src file=$HOME/go/src/test/test.go |
| 25 | // (2) absolute & symlink: GOPATH=$HOME/go/src file=$HOME/src/test/test.go |
| 26 | // (3) symlink & symlink: GOPATH=$HOME/src file=$HOME/src/test/test.go |
| 27 | // (4) symlink & absolute: GOPATH=$HOME/src file= $HOME/go/src/test/test.go |
| 28 | |
| 29 | // Create a temporary home directory under /tmp |
| 30 | home, err := ioutil.TempDir(os.TempDir(), "home") |
| 31 | if err != nil { |
| 32 | t.Errorf("Unable to create a temporary directory in %s", os.TempDir()) |
| 33 | } |
| 34 | |
| 35 | defer os.RemoveAll(home) |
| 36 | |
| 37 | // create filepath /tmp/home/go/src/test/test.go |
| 38 | if err = os.MkdirAll(home+"/go/src/test", 0755); err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | |
| 42 | var buildContext = build.Default |
| 43 | |
| 44 | // Success test cases |
| 45 | type SuccessTest struct { |
| 46 | gopath, filename, wantSrcdir string |
| 47 | } |
| 48 | |
| 49 | successTests := []SuccessTest{ |
| 50 | {home + "/go", home + "/go/src/test/test.go", filepath.FromSlash(home + "/go/src")}, |
| 51 | } |
| 52 | |
| 53 | // Add symlink cases if not on Windows, Plan 9 |
| 54 | if runtime.GOOS != "windows" && runtime.GOOS != "plan9" { |
| 55 | // symlink between /tmp/home/go/src and /tmp/home/src |
| 56 | if err := os.Symlink(home+"/go/src", home+"/src"); err != nil { |
| 57 | t.Fatal(err) |
| 58 | } |
| 59 | |
| 60 | successTests = append(successTests, []SuccessTest{ |
| 61 | {home + "/go", home + "/src/test/test.go", filepath.FromSlash(home + "/go/src")}, |
| 62 | {home, home + "/go/src/test/test.go", filepath.FromSlash(home + "/src")}, |
| 63 | {home, home + "/src/test/test.go", filepath.FromSlash(home + "/src")}, |
| 64 | }...) |
| 65 | } |
| 66 | |
| 67 | for _, test := range successTests { |
| 68 | buildContext.GOPATH = test.gopath |
| 69 | srcdir, importPath, err := guessImportPath(test.filename, &buildContext) |
| 70 | if srcdir != test.wantSrcdir || importPath != "test" || err != nil { |
| 71 | t.Errorf("guessImportPath(%q, %q) = %q, %q, %q; want %q, %q, %q", |
| 72 | test.filename, test.gopath, srcdir, importPath, err, test.wantSrcdir, "test", "nil") |
| 73 | } |
| 74 | } |
| 75 | // Function to format expected error message |
| 76 | errFormat := func(fpath string) string { |
| 77 | return fmt.Sprintf("can't evaluate symlinks of %s", fpath) |
| 78 | } |
| 79 | |
| 80 | // Failure test cases |
| 81 | type FailTest struct { |
| 82 | gopath, filename, wantErr string |
| 83 | } |
| 84 | |
| 85 | failTests := []FailTest{ |
| 86 | {home + "/go", home + "/go/src/fake/test.go", errFormat(filepath.FromSlash(home + "/go/src/fake"))}, |
| 87 | } |
| 88 | |
| 89 | if runtime.GOOS != "windows" && runtime.GOOS != "plan9" { |
| 90 | failTests = append(failTests, []FailTest{ |
| 91 | {home + "/go", home + "/src/fake/test.go", errFormat(filepath.FromSlash(home + "/src/fake"))}, |
| 92 | {home, home + "/src/fake/test.go", errFormat(filepath.FromSlash(home + "/src/fake"))}, |
| 93 | {home, home + "/go/src/fake/test.go", errFormat(filepath.FromSlash(home + "/go/src/fake"))}, |
| 94 | }...) |
| 95 | } |
| 96 | |
| 97 | for _, test := range failTests { |
| 98 | buildContext.GOPATH = test.gopath |
| 99 | srcdir, importPath, err := guessImportPath(test.filename, &buildContext) |
| 100 | if !strings.HasPrefix(fmt.Sprint(err), test.wantErr) { |
| 101 | t.Errorf("guessImportPath(%q, %q) = %q, %q, %q; want %q, %q, %q", |
| 102 | test.filename, test.gopath, srcdir, importPath, err, "", "", test.wantErr) |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 |
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