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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.
//go:build go1.12
// +build go1.12
package multichecker_test
import (
"fmt"
"os"
"os/exec"
"runtime"
"testing"
"golang.org/x/tools/go/analysis"
"golang.org/x/tools/go/analysis/multichecker"
"golang.org/x/tools/go/analysis/passes/findcall"
"golang.org/x/tools/internal/testenv"
)
func main() {
fail := &analysis.Analyzer{
Name: "fail",
Doc: "always fail on a package 'sort'",
Run: func(pass *analysis.Pass) (interface{}, error) {
if pass.Pkg.Path() == "sort" {
return nil, fmt.Errorf("failed")
}
return nil, nil
},
}
multichecker.Main(findcall.Analyzer, fail)
}
// TestExitCode ensures that analysis failures are reported correctly.
// This test fork/execs the main function above.
func TestExitCode(t *testing.T) {
if runtime.GOOS != "linux" {
t.Skipf("skipping fork/exec test on this platform")
}
if os.Getenv("MULTICHECKER_CHILD") == "1" {
// child process
// replace [progname -test.run=TestExitCode -- ...]
// by [progname ...]
os.Args = os.Args[2:]
os.Args[0] = "vet"
main()
panic("unreachable")
}
testenv.NeedsTool(t, "go")
for _, test := range []struct {
args []string
want int
}{
{[]string{"nosuchdir/..."}, 1}, // matched no packages
{[]string{"nosuchpkg"}, 1}, // matched no packages
{[]string{"-unknownflag"}, 2}, // flag error
{[]string{"-findcall.name=panic", "io"}, 3}, // finds diagnostics
{[]string{"-findcall=0", "io"}, 0}, // no checkers
{[]string{"-findcall.name=nosuchfunc", "io"}, 0}, // no diagnostics
{[]string{"-findcall.name=panic", "sort", "io"}, 1}, // 'fail' failed on 'sort'
// -json: exits zero even in face of diagnostics or package errors.
{[]string{"-findcall.name=panic", "-json", "io"}, 0},
{[]string{"-findcall.name=panic", "-json", "io"}, 0},
{[]string{"-findcall.name=panic", "-json", "sort", "io"}, 0},
} {
args := []string{"-test.run=TestExitCode", "--"}
args = append(args, test.args...)
cmd := exec.Command(os.Args[0], args...)
cmd.Env = append(os.Environ(), "MULTICHECKER_CHILD=1")
out, err := cmd.CombinedOutput()
if len(out) > 0 {
t.Logf("%s: out=<<%s>>", test.args, out)
}
var exitcode int
if err, ok := err.(*exec.ExitError); ok {
exitcode = err.ExitCode() // requires go1.12
}
if exitcode != test.want {
t.Errorf("%s: exited %d, want %d", test.args, exitcode, test.want)
}
}
}
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