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