chore(allsrv): adding test for update foo API

The key takeaway here is the response is a nothing burger. We can only ever
test the status code atm. These leaves a lot to be desired. As a service
evolves to cover a broader domain, these types tend to grow. We don't see
anything in an empty response however.

At the moment we're kind of stuck though. We don't have a means to add a
new API that is distinguished from the existing. We'll come back to this.

allsrv/server_test.go

@@ -72,6 +72,33 @@ func TestServer(t *testing.T) {
 			})
 		})
 	})
+
+	t.Run("foo update", func(t *testing.T) {
+		t.Run("when updating an existing foo with valid changes should pass", func(t *testing.T) {
+			db := new(allsrv.InmemDB)
+			err := db.CreateFoo(allsrv.Foo{
+				ID:   "id1",
+				Name: "first_name",
+				Note: "first note",
+			})
+			require.NoError(t, err)
+
+			svr := allsrv.NewServer(db, "dodgers@stink.com", "PaSsWoRd")
+
+			req := httptest.NewRequest("PUT", "/foo", newJSONBody(t, allsrv.Foo{
+				ID:   "id1",
+				Name: "second_name",
+				Note: "second note",
+			}))
+			req.SetBasicAuth("dodgers@stink.com", "PaSsWoRd")
+			rec := httptest.NewRecorder()
+
+			svr.ServeHTTP(rec, req)
+
+			// note: lame we don't get the updated foo back
+			assert.Equal(t, http.StatusOK, rec.Code)
+		})
+	})
 }
 
 func newJSONBody(t *testing.T, v any) *bytes.Buffer {