| // Copyright 2014 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // No testdata on Android. |
| |
| // +build !android |
| // +build go1.11 |
| |
| package main |
| |
| import ( |
| "bytes" |
| "fmt" |
| "path/filepath" |
| "strings" |
| "testing" |
| ) |
| |
| func TestCallgraph(t *testing.T) { |
| gopath, err := filepath.Abs("testdata") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| for _, test := range []struct { |
| algo string |
| tests bool |
| want []string |
| }{ |
| {"rta", false, []string{ |
| // rta imprecisely shows cross product of {main,main2} x {C,D} |
| `pkg.main --> (pkg.C).f`, |
| `pkg.main --> (pkg.D).f`, |
| `pkg.main --> pkg.main2`, |
| `pkg.main2 --> (pkg.C).f`, |
| `pkg.main2 --> (pkg.D).f`, |
| }}, |
| {"pta", false, []string{ |
| // pta distinguishes main->C, main2->D. Also has a root node. |
| `<root> --> pkg.init`, |
| `<root> --> pkg.main`, |
| `pkg.main --> (pkg.C).f`, |
| `pkg.main --> pkg.main2`, |
| `pkg.main2 --> (pkg.D).f`, |
| }}, |
| // tests: both the package's main and the test's main are called. |
| // The callgraph includes all the guts of the "testing" package. |
| {"rta", true, []string{ |
| `pkg.test.main --> testing.MainStart`, |
| `testing.runExample --> pkg.Example`, |
| `pkg.Example --> (pkg.C).f`, |
| `pkg.main --> (pkg.C).f`, |
| }}, |
| {"pta", true, []string{ |
| `<root> --> pkg.test.main`, |
| `<root> --> pkg.main`, |
| `pkg.test.main --> testing.MainStart`, |
| `testing.runExample --> pkg.Example`, |
| `pkg.Example --> (pkg.C).f`, |
| `pkg.main --> (pkg.C).f`, |
| }}, |
| } { |
| const format = "{{.Caller}} --> {{.Callee}}" |
| stdout = new(bytes.Buffer) |
| if err := doCallgraph("testdata/src", gopath, test.algo, format, test.tests, []string{"pkg"}); err != nil { |
| t.Error(err) |
| continue |
| } |
| |
| edges := make(map[string]bool) |
| for _, line := range strings.Split(fmt.Sprint(stdout), "\n") { |
| edges[line] = true |
| } |
| for _, edge := range test.want { |
| if !edges[edge] { |
| t.Errorf("callgraph(%q, %t): missing edge: %s", |
| test.algo, test.tests, edge) |
| } |
| } |
| if t.Failed() { |
| t.Log("got:\n", stdout) |
| } |
| } |
| } |