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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package coverage
import (
"internal/goexperiment"
"os"
"path/filepath"
"strings"
"testing"
_ "unsafe"
)
//go:linkname testing_testGoCoverDir testing.testGoCoverDir
func testing_testGoCoverDir() string
// TestTestSupport does a basic verification of the functionality in
// runtime/coverage.processCoverTestDir (doing this here as opposed to
// relying on other test paths will provide a better signal when
// running "go test -cover" for this package).
func TestTestSupport(t *testing.T) {
if !goexperiment.CoverageRedesign {
return
}
if testing.CoverMode() == "" {
return
}
t.Logf("testing.testGoCoverDir() returns %s mode=%s\n",
testing_testGoCoverDir(), testing.CoverMode())
textfile := filepath.Join(t.TempDir(), "file.txt")
var sb strings.Builder
err := processCoverTestDirInternal(testing_testGoCoverDir(), textfile,
testing.CoverMode(), "", &sb)
if err != nil {
t.Fatalf("bad: %v", err)
}
// Check for existence of text file.
if inf, err := os.Open(textfile); err != nil {
t.Fatalf("problems opening text file %s: %v", textfile, err)
} else {
inf.Close()
}
// Check for percent output with expected tokens.
strout := sb.String()
want1 := "runtime/coverage"
want2 := "of statements"
if !strings.Contains(strout, want1) ||
!strings.Contains(strout, want2) {
t.Logf("output from run: %s\n", strout)
t.Fatalf("percent output missing key tokens: %q and %q",
want1, want2)
}
}
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