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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.
// Support for test coverage with redesigned coverage implementation.
package testing
import (
"fmt"
"internal/goexperiment"
"os"
)
// cover2 variable stores the current coverage mode and a
// tear-down function to be called at the end of the testing run.
var cover2 struct {
mode string
tearDown func(coverprofile string, gocoverdir string) (string, error)
snapshotcov func() float64
}
// registerCover2 is invoked during "go test -cover" runs by the test harness
// code in _testmain.go; it is used to record a 'tear down' function
// (to be called when the test is complete) and the coverage mode.
func registerCover2(mode string, tearDown func(coverprofile string, gocoverdir string) (string, error), snapcov func() float64) {
cover2.mode = mode
cover2.tearDown = tearDown
cover2.snapshotcov = snapcov
}
// coverReport2 invokes a callback in _testmain.go that will
// emit coverage data at the point where test execution is complete,
// for "go test -cover" runs.
func coverReport2() {
if !goexperiment.CoverageRedesign {
panic("unexpected")
}
if errmsg, err := cover2.tearDown(*coverProfile, *gocoverdir); err != nil {
fmt.Fprintf(os.Stderr, "%s: %v\n", errmsg, err)
os.Exit(2)
}
}
// testGoCoverDir returns the value passed to the -test.gocoverdir
// flag by the Go command, if goexperiment.CoverageRedesign is
// in effect.
func testGoCoverDir() string {
return *gocoverdir
}
// coverage2 returns a rough "coverage percentage so far"
// number to support the testing.Coverage() function.
func coverage2() float64 {
if cover2.mode == "" {
return 0.0
}
return cover2.snapshotcov()
}
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