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86 lines
2.9 KiB
Go
86 lines
2.9 KiB
Go
// Go support for Protocol Buffers - Google's data interchange format
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//
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// Copyright 2012 The Go Authors. All rights reserved.
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// https://github.com/golang/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Verify that the compiler output for test.proto is unchanged.
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package testdata
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import (
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"crypto/sha1"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"testing"
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)
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// sum returns in string form (for easy comparison) the SHA-1 hash of the named file.
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func sum(t *testing.T, name string) string {
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data, err := ioutil.ReadFile(name)
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if err != nil {
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t.Fatal(err)
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}
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t.Logf("sum(%q): length is %d", name, len(data))
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hash := sha1.New()
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_, err = hash.Write(data)
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if err != nil {
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t.Fatal(err)
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}
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return fmt.Sprintf("% x", hash.Sum(nil))
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}
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func run(t *testing.T, name string, args ...string) {
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cmd := exec.Command(name, args...)
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cmd.Stdin = os.Stdin
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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err := cmd.Run()
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if err != nil {
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t.Fatal(err)
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}
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}
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func TestGolden(t *testing.T) {
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// Compute the original checksum.
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goldenSum := sum(t, "test.pb.go")
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// Run the proto compiler.
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run(t, "protoc", "--go_out="+os.TempDir(), "test.proto")
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newFile := filepath.Join(os.TempDir(), "test.pb.go")
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defer os.Remove(newFile)
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// Compute the new checksum.
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newSum := sum(t, newFile)
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// Verify
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if newSum != goldenSum {
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run(t, "diff", "-u", "test.pb.go", newFile)
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t.Fatal("Code generated by protoc-gen-go has changed; update test.pb.go")
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}
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}
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