github.com/thediveo/gons@v0.9.9/reexec/testing/coverage_test.go (about)

     1  // Copyright 2020 Harald Albrecht.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package testing
    16  
    17  import (
    18  	"fmt"
    19  	"io"
    20  	"io/ioutil"
    21  	"os"
    22  
    23  	"github.com/thediveo/gons/reexec"
    24  
    25  	. "github.com/onsi/ginkgo/v2"
    26  	. "github.com/onsi/gomega"
    27  )
    28  
    29  func init() {
    30  	reexec.Register("foo", func() {
    31  		fmt.Println(`"foo done"`)
    32  	})
    33  }
    34  
    35  func copyfile(from, to string) {
    36  	ffrom, err := os.Open(from)
    37  	ExpectWithOffset(1, err).NotTo(HaveOccurred())
    38  	defer ffrom.Close()
    39  	fto, err := os.Create(to)
    40  	ExpectWithOffset(1, err).NotTo(HaveOccurred())
    41  	defer fto.Close()
    42  	_, err = io.Copy(fto, ffrom)
    43  	ExpectWithOffset(1, err).NotTo(HaveOccurred())
    44  }
    45  
    46  var _ = Describe("coveraging re-execution", func() {
    47  
    48  	It("re-executes action foo self-test", func() {
    49  		var result string
    50  		Expect(reexec.RunReexecAction(
    51  			"foo",
    52  			reexec.Result(&result),
    53  		)).To(Succeed())
    54  	})
    55  
    56  	It("outputs to directory", func() {
    57  		oldod := outputDir
    58  		defer func() { outputDir = oldod }()
    59  		Expect(toOutputDir("foo")).To(Equal("foo"))
    60  		Expect(toOutputDir("/foo")).To(Equal("/foo"))
    61  		outputDir = "bar"
    62  		Expect(toOutputDir("foo")).To(Equal("bar/foo"))
    63  		Expect(toOutputDir("/foo")).To(Equal("/foo"))
    64  	})
    65  
    66  	It("panics on read-only coverage report", func() {
    67  		if os.Getegid() == 0 {
    68  			Skip("only non-root")
    69  		}
    70  		tmpdir, err := ioutil.TempDir("", "covreport")
    71  		Expect(err).NotTo(HaveOccurred())
    72  		defer os.RemoveAll(tmpdir)
    73  		copyfile("test/cov1.cov", tmpdir+"/main.cov")
    74  		Expect(os.Chmod(tmpdir+"/main.cov", 0400))
    75  		defer func() { _ = os.Chmod(tmpdir+"/main.cov", 0600) }()
    76  		Expect(func() {
    77  			mergeAndReportCoverages(tmpdir+"/main.cov", []string{})
    78  		}).To(Panic())
    79  	})
    80  
    81  	It("parses coverage-related CLI args", func() {
    82  		oldod, oldcp := outputDir, coverProfile
    83  		defer func() { outputDir, coverProfile = oldod, oldcp }()
    84  		arghs := []string{
    85  			"abc",
    86  			"-test.outputdir=bar",
    87  			"-test.coverprofile=foo",
    88  			"-args",
    89  			"-test.outputdir=xxx",
    90  		}
    91  		parseCoverageArgs(arghs)
    92  		Expect(outputDir).To(Equal("bar"))
    93  		Expect(coverProfile).To(Equal("foo"))
    94  	})
    95  
    96  	It("merges coverage reports and writes merged report", func() {
    97  		tmpdir, err := ioutil.TempDir("", "covreport")
    98  		Expect(err).NotTo(HaveOccurred())
    99  		defer os.RemoveAll(tmpdir)
   100  		copyfile("test/cov1.cov", tmpdir+"/main.cov")
   101  
   102  		mergeAndReportCoverages(
   103  			tmpdir+"/main.cov",
   104  			[]string{"test/cov2.cov"})
   105  		actualfinalreport, err := ioutil.ReadFile(tmpdir + "/main.cov")
   106  		Expect(err).NotTo(HaveOccurred())
   107  		finalreport, err := ioutil.ReadFile("test/final.cov")
   108  		Expect(err).NotTo(HaveOccurred())
   109  		Expect(string(actualfinalreport)).To(Equal(string(finalreport)))
   110  	})
   111  
   112  })