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49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gc_test
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import (
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"bytes"
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"internal/testenv"
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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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func TestReproducibleBuilds(t *testing.T) {
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testenv.MustHaveGoBuild(t)
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iters := 10
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if testing.Short() {
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iters = 4
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}
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t.Parallel()
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var want []byte
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tmp, err := ioutil.TempFile("", "")
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if err != nil {
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t.Fatalf("temp file creation failed: %v", err)
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}
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defer os.Remove(tmp.Name())
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defer tmp.Close()
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for i := 0; i < iters; i++ {
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out, err := exec.Command(testenv.GoToolPath(t), "tool", "compile", "-o", tmp.Name(), filepath.Join("testdata", "reproducible", "issue20272.go")).CombinedOutput()
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if err != nil {
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t.Fatalf("failed to compile: %v\n%s", err, out)
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}
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obj, err := ioutil.ReadFile(tmp.Name())
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if err != nil {
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t.Fatalf("failed to read object file: %v", err)
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}
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if i == 0 {
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want = obj
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} else {
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if !bytes.Equal(want, obj) {
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t.Fatalf("builds produced different output after %d iters (%d bytes vs %d bytes)", i, len(want), len(obj))
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}
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}
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}
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}
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