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cmd_plus_test.go
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cmd_plus_test.go
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package execplus_test
import (
"os"
"path"
"regexp"
"strings"
"time"
execplus "github.com/Originate/go-execplus"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Process", func() {
It("returns no errors when the process succeeds", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/passing")
err := cmdPlus.Run()
Expect(err).To(BeNil())
})
It("returns errors when the process fails", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/failing")
err := cmdPlus.Run()
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("exit status 1"))
})
It("captures output", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/passing")
err := cmdPlus.Run()
Expect(err).To(BeNil())
Expect(cmdPlus.GetOutput()).To(Equal("output"))
})
It("allows settings of the current working directory", func() {
cwd, err := os.Getwd()
customDir := path.Join(cwd, "test_executables")
Expect(err).To(BeNil())
cmdPlus := execplus.NewCmdPlus("./print_cwd")
cmdPlus.SetDir(customDir)
err = cmdPlus.Run()
Expect(err).To(BeNil())
Expect(cmdPlus.GetOutput()).To(Equal(customDir))
})
It("allows settings of the env variables", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/print_env")
cmdPlus.AppendEnv([]string{"MY_VAR=special"})
err := cmdPlus.Run()
Expect(err).To(BeNil())
Expect(cmdPlus.GetOutput()).To(Equal("special"))
})
It("allows killing long running processes", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
time.Sleep(time.Second)
err = cmdPlus.Kill()
Expect(err).To(BeNil())
Expect(cmdPlus.GetOutput()).NotTo(ContainSubstring("late chunk 4"))
})
It("allows waiting for long running processes", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.Wait()
Expect(err).To(BeNil())
Expect(cmdPlus.GetOutput()).To(ContainSubstring("late chunk 4"))
})
Describe("output channel", func() {
It("allows access to output chunks (separated by newlines) via a channel", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
outputChannel, _ := cmdPlus.GetOutputChannel()
err := cmdPlus.Start()
Expect(err).To(BeNil())
chunks := []execplus.OutputChunk{
<-outputChannel,
<-outputChannel,
<-outputChannel,
<-outputChannel,
<-outputChannel,
}
Expect(chunks).To(Equal([]execplus.OutputChunk{
{Chunk: "", Full: ""},
{Chunk: "chunk 1", Full: "chunk 1"},
{Chunk: "special chunk 2", Full: "chunk 1\nspecial chunk 2"},
{Chunk: "chunk 3", Full: "chunk 1\nspecial chunk 2\nchunk 3"},
{Chunk: "late chunk 4", Full: "chunk 1\nspecial chunk 2\nchunk 3\nlate chunk 4"},
}))
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("sends the current status whenever the channel is added", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
time.Sleep(time.Second)
outputChannel, _ := cmdPlus.GetOutputChannel()
chunk := <-outputChannel
Expect(chunk).To(Equal(execplus.OutputChunk{Chunk: "", Full: "chunk 1\nspecial chunk 2\nchunk 3"}))
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("works with stderr", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/print_to_stderr")
err := cmdPlus.Start()
Expect(err).To(BeNil())
outputChannel, _ := cmdPlus.GetOutputChannel()
chunks := []execplus.OutputChunk{
<-outputChannel,
<-outputChannel,
<-outputChannel,
<-outputChannel,
}
Expect(chunks).To(Equal([]execplus.OutputChunk{
{Chunk: "", Full: ""},
{
Chunk: "stdout chunk 1",
Full: "stdout chunk 1",
},
{
Chunk: "stderr chunk",
Full: "stdout chunk 1\nstderr chunk",
},
{
Chunk: "stdout chunk 2",
Full: "stdout chunk 1\nstderr chunk\nstdout chunk 2",
},
}))
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
})
Describe("waitForCondition", func() {
It("returns nil if the condition passes within the timeout", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.WaitForCondition(func(chunk, full string) bool {
return strings.Contains(chunk, "special")
}, time.Second*2)
Expect(err).To(BeNil())
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("returns error if the text is not seen within the timeout", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.WaitForCondition(func(chunk, full string) bool {
return strings.Contains(chunk, "other")
}, time.Second*2)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("Timed out after 2s, full output:\nchunk 1\nspecial chunk 2\nchunk 3"))
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("works for sequential waits", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.WaitForCondition(func(chunk, full string) bool {
return chunk == "chunk 1"
}, time.Second*2)
Expect(err).To(BeNil())
err = cmdPlus.WaitForCondition(func(chunk, full string) bool {
return chunk == "late chunk 4"
}, time.Second*8)
Expect(err).To(BeNil())
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
})
Describe("waitForRegexp", func() {
It("returns nil if the text is seen within the timeout", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
isChunk := regexp.MustCompile(`special chunk \d`)
err = cmdPlus.WaitForRegexp(isChunk, time.Second*2)
Expect(err).To(BeNil())
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("returns error if the text is not seen within the timeout", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
isChunk := regexp.MustCompile(`other chunk \d`)
err = cmdPlus.WaitForRegexp(isChunk, time.Second*2)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("Timed out after 2s, full output:\nchunk 1\nspecial chunk 2\nchunk 3"))
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
})
Describe("waitForText", func() {
It("returns nil if the text is seen within the timeout", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.WaitForText("chunk 3", time.Second*2)
Expect(err).To(BeNil())
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("returns error if the text is not seen within the timeout", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/output_chunks")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.WaitForText("chunk 4", time.Second*2)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(Equal("Timed out after 2s, full output:\nchunk 1\nspecial chunk 2\nchunk 3"))
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
It("works for prompts (text that ends with a colon followed by a space)", func() {
cmdPlus := execplus.NewCmdPlus("./test_executables/prompt")
err := cmdPlus.Start()
Expect(err).To(BeNil())
err = cmdPlus.WaitForText("prompt: ", time.Second*2)
Expect(err).To(BeNil())
err = cmdPlus.Kill()
Expect(err).To(BeNil())
})
})
})