Adds --network flag for run command (#131)

docker.go

@@ -113,12 +113,13 @@ type DockerContainerRun struct {
 	inspect    DockerContainerInspect
 
 	command      string
+	entrypoint   string
 	env          map[string]string
 	memory       string
-	tty          bool
-	entrypoint   string
-	publishPorts []string
+	network      string
 	publishAll   bool
+	publishPorts []string
+	tty          bool
 	volumes      []string
 }
 
@@ -168,6 +169,11 @@ func (r DockerContainerRun) WithVolumes(volumes ...string) DockerContainerRun {
 	return r
 }
 
+func (r DockerContainerRun) WithNetwork(network string) DockerContainerRun {
+	r.network = network
+	return r
+}
+
 func (r DockerContainerRun) Execute(imageID string) (Container, error) {
 	args := []string{"container", "run", "--detach"}
 
@@ -206,6 +212,10 @@ func (r DockerContainerRun) Execute(imageID string) (Container, error) {
 		args = append(args, "--entrypoint", r.entrypoint)
 	}
 
+	if r.network != "" {
+		args = append(args, "--network", r.network)
+	}
+
 	for _, volume := range r.volumes {
 		args = append(args, "--volume", volume)
 	}

docker_test.go

@@ -441,6 +441,27 @@ func testDocker(t *testing.T, context spec.G, it spec.S) {
 				})
 			})
 
+			context("when given optional entrypoint setting", func() {
+				it("sets the entrypoint flag on the run command", func() {
+					container, err := docker.Container.Run.
+						WithNetwork("host").
+						Execute("some-image-id")
+
+					Expect(err).NotTo(HaveOccurred())
+					Expect(container).To(Equal(occam.Container{
+						ID: "some-container-id",
+					}))
+
+					Expect(executeArgs).To(HaveLen(2))
+					Expect(executeArgs[0]).To(Equal([]string{
+						"container", "run",
+						"--detach",
+						"--network", "host",
+						"some-image-id",
+					}))
+				})
+			})
+
 			// TODO: remove this when WithVolume is deprecated.
 			context("when given optionial volume setting", func() {
 				it("sets the volume flag on the run command", func() {