!1 Merge back to master

Merge pull request !1 from dev branch

client/components/composite/tests/uploader.test.jsx

@@ -0,0 +1,51 @@
+import React from "react";
+import { mount } from "enzyme";
+import { checkQueueCycle, Uploader } from "../uploader";
+
+const testTimeout = 4000;
+
+describe("Uploader", () => {
+  test(
+    "Uploader will upload files in uploadQueue by interval",
+    () => {
+      // TODO: could be refactored using timer mocks
+      // https://facebook.github.io/jest/docs/en/timer-mocks.html
+      const tests = [
+        {
+          input: { target: { files: ["task1", "task2", "task3"] } },
+          uploadCalled: 3
+        }
+      ];
+
+      let promises = [];
+
+      const uploader = mount(<Uploader />);
+      tests.forEach(testCase => {
+        // mock
+        const uploadSpy = jest.fn();
+        const uploadStub = () => {
+          uploadSpy();
+          return Promise.resolve();
+        };
+        uploader.instance().upload = uploadStub;
+        uploader.update();
+
+        // upload and verify
+        uploader.instance().onUpload(testCase.input);
+        const wait = testCase.input.target.files.length * 1000 + 100;
+        const promise = new Promise(resolve => {
+          setTimeout(() => {
+            expect(uploader.instance().state.uploadQueue.length).toBe(0);
+            expect(uploadSpy.mock.calls.length).toBe(testCase.uploadCalled);
+            resolve();
+          }, wait);
+        });
+
+        promises = [...promises, promise];
+      });
+
+      return Promise.all(promises);
+    },
+    testTimeout
+  );
+});