| 1 | // Copyright 2014 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 | // No testdata on Android. |
| 6 | |
| 7 | //go:build !android && go1.11 |
| 8 | // +build !android,go1.11 |
| 9 | |
| 10 | package main |
| 11 | |
| 12 | import ( |
| 13 | "bytes" |
| 14 | "fmt" |
| 15 | "log" |
| 16 | "os" |
| 17 | "path/filepath" |
| 18 | "runtime" |
| 19 | "strings" |
| 20 | "testing" |
| 21 | |
| 22 | "golang.org/x/tools/internal/testenv" |
| 23 | ) |
| 24 | |
| 25 | func init() { |
| 26 | // This test currently requires GOPATH mode. |
| 27 | // Explicitly disabling module mode should suffix, but |
| 28 | // we'll also turn off GOPROXY just for good measure. |
| 29 | if err := os.Setenv("GO111MODULE", "off"); err != nil { |
| 30 | log.Fatal(err) |
| 31 | } |
| 32 | if err := os.Setenv("GOPROXY", "off"); err != nil { |
| 33 | log.Fatal(err) |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | func TestCallgraph(t *testing.T) { |
| 38 | if runtime.GOOS == "windows" && runtime.GOARCH == "arm64" { |
| 39 | t.Skipf("skipping due to suspected file corruption bug on windows/arm64 (https://go.dev/issue/50706)") |
| 40 | } |
| 41 | |
| 42 | testenv.NeedsTool(t, "go") |
| 43 | |
| 44 | gopath, err := filepath.Abs("testdata") |
| 45 | if err != nil { |
| 46 | t.Fatal(err) |
| 47 | } |
| 48 | |
| 49 | for _, test := range []struct { |
| 50 | algo string |
| 51 | tests bool |
| 52 | want []string |
| 53 | }{ |
| 54 | {"rta", false, []string{ |
| 55 | // rta imprecisely shows cross product of {main,main2} x {C,D} |
| 56 | `pkg.main --> (pkg.C).f`, |
| 57 | `pkg.main --> (pkg.D).f`, |
| 58 | `pkg.main --> pkg.main2`, |
| 59 | `pkg.main2 --> (pkg.C).f`, |
| 60 | `pkg.main2 --> (pkg.D).f`, |
| 61 | }}, |
| 62 | {"vta", false, []string{ |
| 63 | // vta distinguishes main->C, main2->D. |
| 64 | "pkg.main --> (pkg.C).f", |
| 65 | "pkg.main --> pkg.main2", |
| 66 | "pkg.main2 --> (pkg.D).f", |
| 67 | }}, |
| 68 | {"pta", false, []string{ |
| 69 | // pta distinguishes main->C, main2->D. Also has a root node. |
| 70 | `<root> --> pkg.init`, |
| 71 | `<root> --> pkg.main`, |
| 72 | `pkg.main --> (pkg.C).f`, |
| 73 | `pkg.main --> pkg.main2`, |
| 74 | `pkg.main2 --> (pkg.D).f`, |
| 75 | }}, |
| 76 | // tests: both the package's main and the test's main are called. |
| 77 | // The callgraph includes all the guts of the "testing" package. |
| 78 | {"rta", true, []string{ |
| 79 | `pkg.test.main --> testing.MainStart`, |
| 80 | `testing.runExample --> pkg.Example`, |
| 81 | `pkg.Example --> (pkg.C).f`, |
| 82 | `pkg.main --> (pkg.C).f`, |
| 83 | }}, |
| 84 | {"vta", true, []string{ |
| 85 | `pkg.test.main --> testing.MainStart`, |
| 86 | `testing.runExample --> pkg.Example`, |
| 87 | `pkg.Example --> (pkg.C).f`, |
| 88 | `pkg.main --> (pkg.C).f`, |
| 89 | }}, |
| 90 | {"pta", true, []string{ |
| 91 | `<root> --> pkg.test.main`, |
| 92 | `<root> --> pkg.main`, |
| 93 | `pkg.test.main --> testing.MainStart`, |
| 94 | `testing.runExample --> pkg.Example`, |
| 95 | `pkg.Example --> (pkg.C).f`, |
| 96 | `pkg.main --> (pkg.C).f`, |
| 97 | }}, |
| 98 | } { |
| 99 | const format = "{{.Caller}} --> {{.Callee}}" |
| 100 | stdout = new(bytes.Buffer) |
| 101 | if err := doCallgraph("testdata/src", gopath, test.algo, format, test.tests, []string{"pkg"}); err != nil { |
| 102 | t.Error(err) |
| 103 | continue |
| 104 | } |
| 105 | |
| 106 | edges := make(map[string]bool) |
| 107 | for _, line := range strings.Split(fmt.Sprint(stdout), "\n") { |
| 108 | edges[line] = true |
| 109 | } |
| 110 | ok := true |
| 111 | for _, edge := range test.want { |
| 112 | if !edges[edge] { |
| 113 | ok = false |
| 114 | t.Errorf("callgraph(%q, %t): missing edge: %s", |
| 115 | test.algo, test.tests, edge) |
| 116 | } |
| 117 | } |
| 118 | if !ok { |
| 119 | t.Log("got:\n", stdout) |
| 120 | } |
| 121 | } |
| 122 | } |
| 123 |
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