Add an integration test

Covers the case where both a path to a file and an interface are provided

integration/integration_test.go

@@ -0,0 +1,116 @@
+package integration_test
+
+import (
+	"io"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	"github.com/onsi/gomega/gexec"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("The counterfeiter CLI", func() {
+	var pathToCLI string
+
+	BeforeEach(func() {
+		pathToCLI = tmpPath("counterfeiter")
+		copyIn("something.go", pathToCLI)
+	})
+
+	Describe("when given two arguments", func() {
+		It("writes a fake for the given interface from the provided file", func() {
+			session := startCounterfeiter(pathToCLI, "something.go", "Something")
+
+			Eventually(session).Should(gexec.Exit(0))
+			output := string(session.Out.Contents())
+
+			Expect(output).To(ContainSubstring("Wrote `FakeSomething`"))
+		})
+	})
+
+	Describe("when provided three arguments", func() {
+		It("writes the fake to stdout", func() {
+			session := startCounterfeiter(pathToCLI, "something.go", "Something", "-")
+
+			Eventually(session).Should(gexec.Exit(0))
+			output := string(session.Out.Contents())
+
+			Expect(output).To(ContainSubstring("// This file was generated by counterfeiter"))
+		})
+	})
+})
+
+// helper functions
+
+func tmpPath(destination string) string {
+	return filepath.Join(tmpDir, "src", destination)
+}
+
+func copyIn(fixture string, destination string) {
+	err := os.MkdirAll(destination, 0777)
+	Expect(err).ToNot(HaveOccurred())
+
+	filepath.Walk(filepath.Join("..", "fixtures", fixture), func(path string, info os.FileInfo, err error) error {
+		if info.IsDir() {
+			return nil
+		}
+
+		base := filepath.Base(path)
+
+		src, err := os.Open(path)
+		Expect(err).ToNot(HaveOccurred())
+
+		dst, err := os.Create(filepath.Join(destination, base))
+		Expect(err).ToNot(HaveOccurred())
+
+		_, err = io.Copy(dst, src)
+		Expect(err).ToNot(HaveOccurred())
+		return nil
+	})
+}
+
+func startCounterfeiter(workingDir string, args ...string) *gexec.Session {
+	fakeGoPathDir := filepath.Dir(filepath.Dir(workingDir))
+	absPath, _ := filepath.Abs(fakeGoPathDir)
+	absPathWithSymlinks, _ := filepath.EvalSymlinks(absPath)
+
+	cmd := exec.Command(pathToCounterfeiter, args...)
+	cmd.Dir = workingDir
+	cmd.Env = []string{"GOPATH=" + absPathWithSymlinks}
+
+	session, err := gexec.Start(cmd, GinkgoWriter, GinkgoWriter)
+	Expect(err).ToNot(HaveOccurred())
+	return session
+}
+
+// gexec setup
+
+var tmpDir string
+var pathToCounterfeiter string
+
+var _ = SynchronizedBeforeSuite(func() []byte {
+	pathToCounterfeiter, err := gexec.Build("github.com/maxbrunsfeld/counterfeiter")
+	Expect(err).ToNot(HaveOccurred())
+	return []byte(pathToCounterfeiter)
+}, func(computedPath []byte) {
+	pathToCounterfeiter = string(computedPath)
+})
+
+var _ = SynchronizedAfterSuite(func() {}, func() {
+	gexec.CleanupBuildArtifacts()
+})
+
+var _ = BeforeEach(func() {
+	var err error
+	tmpDir, err = ioutil.TempDir("", "counterfeiter-integration")
+	Expect(err).ToNot(HaveOccurred())
+})
+
+var _ = AfterEach(func() {
+	err := os.RemoveAll(tmpDir)
+	Expect(err).ToNot(HaveOccurred())
+})

integration/suite_test.go

@@ -0,0 +1,13 @@
+package integration_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+func TestCounterfeiterCLI(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Counterfeiter CLI Suite")
+}