ifix(manager): test for create deployments

This is a first pass at using the new test stub to test HTTP services.

cmd/manager/deployments_test.go

 package main
 
 import (
+	"bytes"
+	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -28,6 +30,25 @@ func TestHealthz(t *testing.T) {
 	// TODO: Get the body and check on the content type and the body.
 }
 
+func TestCreateDeployments(t *testing.T) {
+	c := stubContext()
+	tpl := &common.Template{Name: "foo"}
+	s := httpHarness(c, "POST /deployments", createDeploymentHandlerFunc)
+	defer s.Close()
+
+	var b bytes.Buffer
+	if err := json.NewEncoder(&b).Encode(tpl); err != nil {
+		t.Fatal(err)
+	}
+
+	res, err := http.Post(s.URL+"/deployments", "application/json", &b)
+	if err != nil {
+		t.Errorf("Failed POST: %s", err)
+	} else if res.StatusCode != http.StatusCreated {
+		t.Errorf("Expected status %d, got %d", http.StatusCreated, res.StatusCode)
+	}
+}
+
 // httpHarness is a simple test server fixture.
 // Simple fixture for standing up a test server with a single route.
 //