github.com/john-lin/cni@v0.6.0-rc1.0.20170712150331-b69e640cc0e2/pkg/version/testhelpers/testhelpers_test.go (about)

     1  // Copyright 2016 CNI authors
     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  package testhelpers_test
    15  
    16  import (
    17  	"io/ioutil"
    18  	"os"
    19  	"os/exec"
    20  	"path/filepath"
    21  
    22  	"github.com/containernetworking/cni/pkg/version/testhelpers"
    23  	. "github.com/onsi/ginkgo"
    24  	. "github.com/onsi/gomega"
    25  )
    26  
    27  var _ = Describe("BuildAt", func() {
    28  	var (
    29  		gitRef         string
    30  		outputFilePath string
    31  		outputDir      string
    32  		programSource  []byte
    33  	)
    34  	BeforeEach(func() {
    35  		programSource = []byte(`package main
    36  
    37  import "github.com/containernetworking/cni/pkg/skel"
    38  
    39  func c(_ *skel.CmdArgs) error { return nil }
    40  
    41  func main() { skel.PluginMain(c, c) }
    42  `)
    43  		gitRef = "f4364185253"
    44  
    45  		var err error
    46  		outputDir, err = ioutil.TempDir("", "bin")
    47  		Expect(err).NotTo(HaveOccurred())
    48  		outputFilePath = filepath.Join(outputDir, "some-binary")
    49  	})
    50  
    51  	AfterEach(func() {
    52  		Expect(os.RemoveAll(outputDir)).To(Succeed())
    53  	})
    54  
    55  	It("builds the provided source code using the CNI library at the given git ref", func() {
    56  		Expect(outputFilePath).NotTo(BeAnExistingFile())
    57  
    58  		err := testhelpers.BuildAt(programSource, gitRef, outputFilePath)
    59  		Expect(err).NotTo(HaveOccurred())
    60  
    61  		Expect(outputFilePath).To(BeAnExistingFile())
    62  
    63  		cmd := exec.Command(outputFilePath)
    64  		cmd.Env = []string{"CNI_COMMAND=VERSION"}
    65  		output, err := cmd.CombinedOutput()
    66  		Expect(err).To(BeAssignableToTypeOf(&exec.ExitError{}))
    67  		Expect(output).To(ContainSubstring("unknown CNI_COMMAND: VERSION"))
    68  	})
    69  })
    70  
    71  var _ = Describe("LocateCurrentGitRepo", func() {
    72  	It("returns the path to the root of the CNI git repo", func() {
    73  		path, err := testhelpers.LocateCurrentGitRepo()
    74  		Expect(err).NotTo(HaveOccurred())
    75  
    76  		AssertItIsTheCNIRepoRoot(path)
    77  	})
    78  
    79  	Context("when run from a different directory", func() {
    80  		BeforeEach(func() {
    81  			os.Chdir("..")
    82  		})
    83  
    84  		It("still finds the CNI repo root", func() {
    85  			path, err := testhelpers.LocateCurrentGitRepo()
    86  			Expect(err).NotTo(HaveOccurred())
    87  
    88  			AssertItIsTheCNIRepoRoot(path)
    89  		})
    90  	})
    91  })
    92  
    93  func AssertItIsTheCNIRepoRoot(path string) {
    94  	Expect(path).To(BeADirectory())
    95  	files, err := ioutil.ReadDir(path)
    96  	Expect(err).NotTo(HaveOccurred())
    97  
    98  	names := []string{}
    99  	for _, file := range files {
   100  		names = append(names, file.Name())
   101  	}
   102  
   103  	Expect(names).To(ContainElement("SPEC.md"))
   104  	Expect(names).To(ContainElement("libcni"))
   105  	Expect(names).To(ContainElement("cnitool"))
   106  }