| 1 | // Copyright 2018 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 analysisflags_test |
| 6 | |
| 7 | import ( |
| 8 | "fmt" |
| 9 | "os" |
| 10 | "os/exec" |
| 11 | "runtime" |
| 12 | "strings" |
| 13 | "testing" |
| 14 | |
| 15 | "golang.org/x/tools/go/analysis" |
| 16 | "golang.org/x/tools/go/analysis/internal/analysisflags" |
| 17 | ) |
| 18 | |
| 19 | func main() { |
| 20 | fmt.Println(analysisflags.Parse([]*analysis.Analyzer{ |
| 21 | {Name: "a1", Doc: "a1"}, |
| 22 | {Name: "a2", Doc: "a2"}, |
| 23 | {Name: "a3", Doc: "a3"}, |
| 24 | }, true)) |
| 25 | os.Exit(0) |
| 26 | } |
| 27 | |
| 28 | // This test fork/execs the main function above. |
| 29 | func TestExec(t *testing.T) { |
| 30 | if runtime.GOOS != "linux" { |
| 31 | t.Skipf("skipping fork/exec test on this platform") |
| 32 | } |
| 33 | |
| 34 | progname := os.Args[0] |
| 35 | |
| 36 | if os.Getenv("ANALYSISFLAGS_CHILD") == "1" { |
| 37 | // child process |
| 38 | os.Args = strings.Fields(progname + " " + os.Getenv("FLAGS")) |
| 39 | main() |
| 40 | panic("unreachable") |
| 41 | } |
| 42 | |
| 43 | for _, test := range []struct { |
| 44 | flags string |
| 45 | want string |
| 46 | }{ |
| 47 | {"", "[a1 a2 a3]"}, |
| 48 | {"-a1=0", "[a2 a3]"}, |
| 49 | {"-a1=1", "[a1]"}, |
| 50 | {"-a1", "[a1]"}, |
| 51 | {"-a1=1 -a3=1", "[a1 a3]"}, |
| 52 | {"-a1=1 -a3=0", "[a1]"}, |
| 53 | } { |
| 54 | cmd := exec.Command(progname, "-test.run=TestExec") |
| 55 | cmd.Env = append(os.Environ(), "ANALYSISFLAGS_CHILD=1", "FLAGS="+test.flags) |
| 56 | |
| 57 | output, err := cmd.CombinedOutput() |
| 58 | if err != nil { |
| 59 | t.Fatalf("exec failed: %v; output=<<%s>>", err, output) |
| 60 | } |
| 61 | |
| 62 | got := strings.TrimSpace(string(output)) |
| 63 | if got != test.want { |
| 64 | t.Errorf("got %s, want %s", got, test.want) |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 |
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