Merge pull request #65 from open-source-labs/test-utils

Test utils library

__tests__/frontend/lib/utils.spec.ts

@@ -0,0 +1,29 @@
+// overwrite window.require method to prevent errors when executing utils.ts without electron
+window.require = ((str: string) => str) as any
+
+// eslint-disable-next-line import/first
+import * as utils from '../../../frontend/lib/utils';
+
+describe('once', () => {
+  it('should only run once', () => {
+    let counter = 0;
+    const cb = () => {
+      counter += 1;
+    };
+    const limitedFunc = utils.once(cb);
+
+    expect(counter).toBe(0)
+    limitedFunc()
+    expect(counter).toBe(1)
+    limitedFunc()
+    expect(counter).toBe(1)
+    limitedFunc()
+    expect(counter).toBe(1)
+  });
+});
+
+describe('readingTime', () => {
+  it('should never be less than 3s',() => {
+    expect(utils.readingTime('short')).toBe(3000)
+  })
+})