Add unit tests for getISOLocalDateTime

Author: wojtekmaj

src/shared/__tests__/dates.js

@@ -0,0 +1,23 @@
+import { getISOLocalDateTime } from '../dates';
+
+describe('getISOLocalDateTime', () => {
+  it('returns proper ISO date', () => {
+    const date = new Date(Date.UTC(2017, 0, 1, 21, 41, 37));
+
+    const ISODate = getISOLocalDateTime(date);
+
+    expect(ISODate).toBe('2017-01-01T21:41:37');
+  });
+
+  it('returns nothing when given nothing', () => {
+    expect(getISOLocalDateTime()).toBeUndefined();
+  });
+
+  it('throws an error when given nonsense data', () => {
+    const text = 'wololo';
+    const fn = () => {};
+
+    expect(() => getISOLocalDateTime(text)).toThrow();
+    expect(() => getISOLocalDateTime(fn)).toThrow();
+  });
+});