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// Copyright 2018 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.
package analysisflags_test
import (
"fmt"
"os"
"os/exec"
"runtime"
"strings"
"testing"
"golang.org/x/tools/go/analysis"
"golang.org/x/tools/go/analysis/internal/analysisflags"
)
func main() {
fmt.Println(analysisflags.Parse([]*analysis.Analyzer{
{Name: "a1", Doc: "a1"},
{Name: "a2", Doc: "a2"},
{Name: "a3", Doc: "a3"},
}, true))
os.Exit(0)
}
// This test fork/execs the main function above.
func TestExec(t *testing.T) {
if runtime.GOOS != "linux" {
t.Skipf("skipping fork/exec test on this platform")
}
progname := os.Args[0]
if os.Getenv("ANALYSISFLAGS_CHILD") == "1" {
// child process
os.Args = strings.Fields(progname + " " + os.Getenv("FLAGS"))
main()
panic("unreachable")
}
for _, test := range []struct {
flags string
want string
}{
{"", "[a1 a2 a3]"},
{"-a1=0", "[a2 a3]"},
{"-a1=1", "[a1]"},
{"-a1", "[a1]"},
{"-a1=1 -a3=1", "[a1 a3]"},
{"-a1=1 -a3=0", "[a1]"},
} {
cmd := exec.Command(progname, "-test.run=TestExec")
cmd.Env = append(os.Environ(), "ANALYSISFLAGS_CHILD=1", "FLAGS="+test.flags)
output, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("exec failed: %v; output=<<%s>>", err, output)
}
got := strings.TrimSpace(string(output))
if got != test.want {
t.Errorf("got %s, want %s", got, test.want)
}
}
}
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