mirror of https://github.com/golang/go.git
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
// Copyright 2020 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 ld
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import (
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"bytes"
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"internal/testenv"
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"path/filepath"
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"testing"
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)
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func TestDeadcode(t *testing.T) {
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testenv.MustHaveGoBuild(t)
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t.Parallel()
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tmpdir := t.TempDir()
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tests := []struct {
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src string
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pos, neg string // positive and negative patterns
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}{
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{"reflectcall", "", "main.T.M"},
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{"typedesc", "", "type:main.T"},
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{"ifacemethod", "", "main.T.M"},
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{"ifacemethod2", "main.T.M", ""},
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{"ifacemethod3", "main.S.M", ""},
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{"ifacemethod4", "", "main.T.M"},
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}
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for _, test := range tests {
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test := test
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t.Run(test.src, func(t *testing.T) {
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t.Parallel()
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src := filepath.Join("testdata", "deadcode", test.src+".go")
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exe := filepath.Join(tmpdir, test.src+".exe")
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cmd := testenv.Command(t, testenv.GoToolPath(t), "build", "-ldflags=-dumpdep", "-o", exe, src)
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out, err := cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("%v: %v:\n%s", cmd.Args, err, out)
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}
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if test.pos != "" && !bytes.Contains(out, []byte(test.pos+"\n")) {
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t.Errorf("%s should be reachable. Output:\n%s", test.pos, out)
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}
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if test.neg != "" && bytes.Contains(out, []byte(test.neg+"\n")) {
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t.Errorf("%s should not be reachable. Output:\n%s", test.neg, out)
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}
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})
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}
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}
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