[fix] add files

Author: Martijn Swaagman

src/utils.js

@@ -0,0 +1,13 @@
+/**
+ * Convert a Date to a timestamp.
+ */
+export function toMilliseconds(options: Options, ...keys: Array<string>) {
+  keys.forEach(function each(key) {
+    const value = options[key];
+
+    // Is it a Date object?
+    if (typeof value === 'object' && typeof value.getMonth === 'function') {
+      options[key] = value.getTime();
+    }
+  });
+}

test/constants.test.js

@@ -0,0 +1,16 @@
+import * as constants from '../src/constants.js';
+
+describe('constants', function (){
+  it('exports mode values', () => {
+    expect(constants).toHaveProperty('MODE_DATE', 'date');
+    expect(constants).toHaveProperty('MODE_TIME', 'time');
+    expect(constants).toHaveProperty('MODE_DATETIME', 'datetime');
+  });
+
+  it('exports display values', () => {
+    expect(constants).toHaveProperty('DISPLAY_DEFAULT', 'default');
+    expect(constants).toHaveProperty('DISPLAY_SPINNER', 'spinner');
+    expect(constants).toHaveProperty('DISPLAY_CLOCK', 'clock');
+    expect(constants).toHaveProperty('DISPLAY_CALENDAR', 'calendar');
+  });
+});

test/utils.test.js

@@ -0,0 +1,20 @@
+import { toMilliseconds} from '../src/utils.js';
+
+describe('utils', function (){
+  describe('toMilliseconds', () => {
+    it('converts Date values by key to milliseconds', () => {
+      const options = {
+        value: new Date('2020-12-12'),
+        minimumDate: new Date('1950-01-01'),
+        maximumDate: new Date('2050-12-31'),
+      };
+
+      toMilliseconds(options, 'value');
+      expect(options).toHaveProperty('value', 1607731200000);
+
+      toMilliseconds(options, 'minimumDate', 'maximumDate');
+      expect(options).toHaveProperty('minimumDate', -631152000000);
+      expect(options).toHaveProperty('maximumDate', 2556057600000);
+    });
+  });
+});