Timestamps on apps / routes (#614)

* route updated_at

* add app created at, fix some route updated_at bugs

* add app updated_at

TODO need to add tests through front end
TODO for validation we don't really want to use the validate wrapper since
it's a programmer error and not a user error, hopefully tests block this.

* add tests for timestamps to exist / change on apps&routes

* route equals at done, fix tests wit dis

* fix up the equals sugar

* add swagger

* fix rebase

* precisely allocate maps in clone

* vetted

* meh

* fix api tests

api/server/routes_test.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/fnproject/fn/api/datastore"
 	"github.com/fnproject/fn/api/logs"
@@ -49,6 +50,46 @@ func (test *routeTestCase) run(t *testing.T, i int, buf *bytes.Buffer) {
 				i, test.expectedError, resp.Error.Message)
 		}
 	}
+
+	if test.expectedCode == http.StatusOK {
+		var rwrap models.RouteWrapper
+		err := json.NewDecoder(rec.Body).Decode(&rwrap)
+		if err != nil {
+			t.Log(buf.String())
+			t.Errorf("Test %d: error decoding body for 'ok' json, it was a lie: %v", i, err)
+		}
+
+		route := rwrap.Route
+		if test.method == http.MethodPost {
+			// IsZero() doesn't really work, this ensures it's not unset as long as we're not in 1970
+			if time.Time(route.CreatedAt).Before(time.Now().Add(-1 * time.Hour)) {
+				t.Log(buf.String())
+				t.Errorf("Test %d: expected created_at to be set on route, it wasn't: %s", i, route.CreatedAt)
+			}
+			if !(time.Time(route.CreatedAt)).Equal(time.Time(route.UpdatedAt)) {
+				t.Log(buf.String())
+				t.Errorf("Test %d: expected updated_at to be set and same as created at, it wasn't: %s %s", i, route.CreatedAt, route.UpdatedAt)
+			}
+		}
+
+		if test.method == http.MethodPatch {
+			// IsZero() doesn't really work, this ensures it's not unset as long as we're not in 1970
+			if time.Time(route.UpdatedAt).Before(time.Now().Add(-1 * time.Hour)) {
+				t.Log(buf.String())
+				t.Errorf("Test %d: expected updated_at to be set on route, it wasn't: %s", i, route.UpdatedAt)
+			}
+
+			// this isn't perfect, since a PATCH could succeed without updating any
+			// fields (among other reasons), but just don't make a test for that or
+			// special case (the body or smth) to ignore it here!
+			// this is a decent approximation that the timestamp gets changed
+			if (time.Time(route.UpdatedAt)).Equal(time.Time(route.CreatedAt)) {
+				t.Log(buf.String())
+				t.Errorf("Test %d: expected updated_at to not be the same as created at, it wasn't: %s %s", i, route.CreatedAt, route.UpdatedAt)
+			}
+		}
+	}
+
 	cancel()
 	buf.Reset()
 }