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// Copyright 2021 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 main
import (
"os"
"os/exec"
"path/filepath"
"strings"
"sync"
"testing"
"golang.org/x/tools/internal/testenv"
)
func TestMain(m *testing.M) {
if os.Getenv("GO_FILE2FUZZ_TEST_IS_FILE2FUZZ") != "" {
main()
os.Exit(0)
}
os.Exit(m.Run())
}
var f2f struct {
once sync.Once
path string
err error
}
func file2fuzz(t *testing.T, dir string, args []string, stdin string) (string, bool) {
testenv.NeedsExec(t)
f2f.once.Do(func() {
f2f.path, f2f.err = os.Executable()
})
if f2f.err != nil {
t.Fatal(f2f.err)
}
cmd := exec.Command(f2f.path, args...)
cmd.Dir = dir
cmd.Env = append(os.Environ(), "PWD="+dir, "GO_FILE2FUZZ_TEST_IS_FILE2FUZZ=1")
if stdin != "" {
cmd.Stdin = strings.NewReader(stdin)
}
out, err := cmd.CombinedOutput()
if err != nil {
return string(out), true
}
return string(out), false
}
func TestFile2Fuzz(t *testing.T) {
type file struct {
name string
dir bool
content string
}
tests := []struct {
name string
args []string
stdin string
inputFiles []file
expectedStdout string
expectedFiles []file
expectedError string
}{
{
name: "stdin, stdout",
stdin: "hello",
expectedStdout: "go test fuzz v1\n[]byte(\"hello\")",
},
{
name: "stdin, output file",
stdin: "hello",
args: []string{"-o", "output"},
expectedFiles: []file{{name: "output", content: "go test fuzz v1\n[]byte(\"hello\")"}},
},
{
name: "stdin, output directory",
stdin: "hello",
args: []string{"-o", "output"},
inputFiles: []file{{name: "output", dir: true}},
expectedFiles: []file{{name: "output/ffc7b87a0377262d4f77926bd235551d78e6037bbe970d81ec39ac1d95542f7b", content: "go test fuzz v1\n[]byte(\"hello\")"}},
},
{
name: "input file, output file",
args: []string{"-o", "output", "input"},
inputFiles: []file{{name: "input", content: "hello"}},
expectedFiles: []file{{name: "output", content: "go test fuzz v1\n[]byte(\"hello\")"}},
},
{
name: "input file, output directory",
args: []string{"-o", "output", "input"},
inputFiles: []file{{name: "output", dir: true}, {name: "input", content: "hello"}},
expectedFiles: []file{{name: "output/ffc7b87a0377262d4f77926bd235551d78e6037bbe970d81ec39ac1d95542f7b", content: "go test fuzz v1\n[]byte(\"hello\")"}},
},
{
name: "input files, output directory",
args: []string{"-o", "output", "input", "input-2"},
inputFiles: []file{{name: "output", dir: true}, {name: "input", content: "hello"}, {name: "input-2", content: "hello :)"}},
expectedFiles: []file{
{name: "output/ffc7b87a0377262d4f77926bd235551d78e6037bbe970d81ec39ac1d95542f7b", content: "go test fuzz v1\n[]byte(\"hello\")"},
{name: "output/28059db30ce420ff65b2c29b749804c69c601aeca21b3cbf0644244ff080d7a5", content: "go test fuzz v1\n[]byte(\"hello :)\")"},
},
},
{
name: "input files, no output",
args: []string{"input", "input-2"},
inputFiles: []file{{name: "output", dir: true}, {name: "input", content: "hello"}, {name: "input-2", content: "hello :)"}},
expectedError: "file2fuzz: -o required with multiple input files\n",
},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
tmp, err := os.MkdirTemp(os.TempDir(), "file2fuzz")
if err != nil {
t.Fatalf("os.MkdirTemp failed: %s", err)
}
defer os.RemoveAll(tmp)
for _, f := range tc.inputFiles {
if f.dir {
if err := os.Mkdir(filepath.Join(tmp, f.name), 0777); err != nil {
t.Fatalf("failed to create test directory: %s", err)
}
} else {
if err := os.WriteFile(filepath.Join(tmp, f.name), []byte(f.content), 0666); err != nil {
t.Fatalf("failed to create test input file: %s", err)
}
}
}
out, failed := file2fuzz(t, tmp, tc.args, tc.stdin)
if failed && tc.expectedError == "" {
t.Fatalf("file2fuzz failed unexpectedly: %s", out)
} else if failed && out != tc.expectedError {
t.Fatalf("file2fuzz returned unexpected error: got %q, want %q", out, tc.expectedError)
}
if !failed && out != tc.expectedStdout {
t.Fatalf("file2fuzz unexpected stdout: got %q, want %q", out, tc.expectedStdout)
}
for _, f := range tc.expectedFiles {
c, err := os.ReadFile(filepath.Join(tmp, f.name))
if err != nil {
t.Fatalf("failed to read expected output file %q: %s", f.name, err)
}
if string(c) != f.content {
t.Fatalf("expected output file %q contains unexpected content: got %s, want %s", f.name, string(c), f.content)
}
}
})
}
}
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