license_test.go

// Copyright © 2017 Stefan Kollmann
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package main

import (
	"bytes"
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

const (
	licenseHeader = "// Permission is hereby granted, free of charge, to any person obtaining a copy\n" +
		"// of this software and associated documentation files (the \"Software\"), to deal\n" +
		"// in the Software without restriction, including without limitation the rights\n" +
		"// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n" +
		"// copies of the Software, and to permit persons to whom the Software is\n" +
		"// furnished to do so, subject to the following conditions:\n" +
		"//\n" +
		"// The above copyright notice and this permission notice shall be included in\n" +
		"// all copies or substantial portions of the Software.\n" +
		"//\n" +
		"// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n" +
		"// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n" +
		"// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n" +
		"// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n" +
		"// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n" +
		"// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n" +
		"// THE SOFTWARE."

	prefix = "// Copyright ©"
)

func TestLicense(t *testing.T) {
	err := filepath.Walk(".", func(path string, fi os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		if filepath.Ext(path) != ".go" {
			return nil
		}

		if strings.Contains(path, "vendor/") {
			return nil
		}

		src, err := ioutil.ReadFile(path)
		if err != nil {
			return nil
		}

		if !bytes.Contains(src, []byte(licenseHeader)) {
			t.Errorf("%v: no license header found", path)
			return nil
		}

		if !bytes.HasPrefix(src, []byte(prefix)) {
			t.Errorf("%v: no license at the top", path)
		}

		return nil
	})

	if err != nil {
		t.Fatal(err)
	}
}