no_matcher.go

package matcher_test

import (
	"os/exec"
	"time"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"golang.org/x/sys/unix"
)

var _ = Describe("Pid Matcher Example", func() {
	When("there is a process running", func() {
		var pid int

		BeforeEach(func() {
			cmd := exec.Command("sleep", "10")
			Expect(cmd.Start()).To(Succeed())

			go func() {
				Expect(cmd.Wait()).To(Succeed())
			}()

			pid = cmd.Process.Pid
		})

		It("runs for at least 5 seconds", func() {
			Consistently(func() bool {
				return unix.Kill(pid, unix.Signal(0)) == nil
			}, time.Second*5, time.Second).Should(BeTrue())
		})
	})
})