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// Copyright (c) 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cover
import (
"flag"
"io"
"os"
"strings"
"testing"
)
// ParseAndStriptestFlags runs flag.Parse to parse the standard flags of a test
// binary and remove them from os.Args.
func ParseAndStripTestFlags() {
// Parse the command line using the stdlib flag package so the flags defined
// in the testing package get populated.
flag.Parse()
// Strip command line arguments that were for the testing package and are now
// handled.
var runtimeArgs []string
for _, arg := range os.Args {
if strings.HasPrefix(arg, "-test.") ||
strings.HasPrefix(arg, "-httptest.") {
continue
}
runtimeArgs = append(runtimeArgs, arg)
}
os.Args = runtimeArgs
}
type dummyTestDeps func(pat, str string) (bool, error)
func (d dummyTestDeps) MatchString(pat, str string) (bool, error) { return false, nil }
func (d dummyTestDeps) StartCPUProfile(io.Writer) error { return nil }
func (d dummyTestDeps) StopCPUProfile() {}
func (f dummyTestDeps) StartTestLog(w io.Writer) {}
func (f dummyTestDeps) StopTestLog() error { return nil }
func (d dummyTestDeps) WriteHeapProfile(io.Writer) error { return nil }
func (d dummyTestDeps) WriteProfileTo(string, io.Writer, int) error { return nil }
func (f dummyTestDeps) ImportPath() string { return "" }
// FlushProfiles flushes test profiles to disk. It works by build and executing
// a dummy list of 1 test. This is to ensure we execute the M.after() function
// (a function internal to the testing package) where all reporting (cpu, mem,
// cover, ... profiles) is flushed to disk.
func FlushProfiles() {
// Redirect Stdout/err temporarily so the testing code doesn't output the
// regular:
// PASS
// coverage: 21.4% of statements
// Thanks to this, we can test the output of the instrumented binary the same
// way the normal binary is.
oldstdout := os.Stdout
oldstderr := os.Stderr
os.Stdout, _ = os.Open(os.DevNull)
os.Stderr, _ = os.Open(os.DevNull)
tests := []testing.InternalTest{}
benchmarks := []testing.InternalBenchmark{}
examples := []testing.InternalExample{}
var f dummyTestDeps
dummyM := testing.MainStart(f, tests, benchmarks, examples)
dummyM.Run()
// restore stdout/err
os.Stdout = oldstdout
os.Stderr = oldstderr
}