94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
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// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package gtest contains helpers for running google-test tests from Go.
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package gtest
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import (
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"fmt"
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"os/exec"
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"strings"
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)
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var (
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// ListTestFlag is the flag that will list tests in gtest binaries.
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ListTestFlag = "--gtest_list_tests"
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// FilterTestFlag is the flag that will filter tests in gtest binaries.
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FilterTestFlag = "--gtest_filter"
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)
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// TestCase is a single gtest test case.
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type TestCase struct {
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// Suite is the suite for this test.
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Suite string
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// Name is the name of this individual test.
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Name string
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}
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// FullName returns the name of the test including the suite. It is suitable to
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// pass to "-gtest_filter".
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func (tc TestCase) FullName() string {
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return fmt.Sprintf("%s.%s", tc.Suite, tc.Name)
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}
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// ParseTestCases calls a gtest test binary to list its test and returns a
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// slice with the name and suite of each test.
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func ParseTestCases(testBin string, extraArgs ...string) ([]TestCase, error) {
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args := append([]string{ListTestFlag}, extraArgs...)
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cmd := exec.Command(testBin, args...)
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out, err := cmd.Output()
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if err != nil {
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exitErr, ok := err.(*exec.ExitError)
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if !ok {
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return nil, fmt.Errorf("could not enumerate gtest tests: %v", err)
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}
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return nil, fmt.Errorf("could not enumerate gtest tests: %v\nstderr:\n%s", err, exitErr.Stderr)
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}
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var t []TestCase
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var suite string
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for _, line := range strings.Split(string(out), "\n") {
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// Strip comments.
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line = strings.Split(line, "#")[0]
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// New suite?
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if !strings.HasPrefix(line, " ") {
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suite = strings.TrimSuffix(strings.TrimSpace(line), ".")
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continue
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}
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// Individual test.
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name := strings.TrimSpace(line)
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// Do we have a suite yet?
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if suite == "" {
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return nil, fmt.Errorf("test without a suite: %v", name)
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}
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// Add this individual test.
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t = append(t, TestCase{
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Suite: suite,
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Name: name,
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})
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}
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if len(t) == 0 {
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return nil, fmt.Errorf("no tests parsed from %v", testBin)
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}
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return t, nil
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}
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