Adding JSON format validation API tests

test/fn-api-tests/formats_test.go

@@ -0,0 +1,72 @@
+package tests
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/url"
+	"path"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+type JSONResponse struct {
+	Message string `json:"message"`
+}
+
+func TestFnFormats(t *testing.T) {
+
+	t.Run("test-json-format", func(t *testing.T) {
+		t.Parallel()
+		s := SetupDefaultSuite()
+
+		// TODO(treeder): put image in fnproject @ dockerhub
+		image := "denismakogon/test-hot-json-go:0.0.1"
+		format := "json"
+		route := "/test-hot-json-go"
+
+		CreateApp(t, s.Context, s.Client, s.AppName, map[string]string{})
+		CreateRoute(t, s.Context, s.Client, s.AppName, route, image, "sync",
+			format, s.RouteConfig, s.RouteHeaders)
+
+		u := url.URL{
+			Scheme: "http",
+			Host:   Host(),
+		}
+		u.Path = path.Join(u.Path, "r", s.AppName, s.RoutePath)
+
+		b, _ := json.Marshal(&struct {
+			Name string `json:"name"`
+		}{
+			Name: "Jimmy",
+		})
+		content := bytes.NewBuffer(b)
+		output := &bytes.Buffer{}
+		headers, err := CallFN(u.String(), content, output, "POST", []string{})
+		if err != nil {
+			t.Errorf("Got unexpected error: %v", err)
+		}
+
+		msg := &JSONResponse{}
+		json.Unmarshal(output.Bytes(), msg)
+		expectedOutput := "Hello Jimmy"
+		if !strings.Contains(expectedOutput, msg.Message) {
+			t.Errorf("Assertion error.\n\tExpected: %v\n\tActual: %v", expectedOutput, output.String())
+		}
+
+		expectedHeaderNames := []string{"Content-Type", "Content-Length"}
+		expectedHeaderValues := []string{"application/json; charset=utf-8", strconv.Itoa(output.Len())}
+		for i, name := range expectedHeaderNames {
+			actual := headers.Get(name)
+			expected := expectedHeaderValues[i]
+			if !strings.Contains(expected, actual) {
+				t.Errorf("HTTP header assertion error for %v."+
+					"\n\tExpected: %v\n\tActual: %v", name, expected, actual)
+			}
+		}
+
+		DeleteApp(t, s.Context, s.Client, s.AppName)
+
+	})
+
+}