fix(date): Compare dates only using year, month, date

Closes #2484

src/params/paramTypes.ts

@@ -57,7 +57,10 @@ export class ParamTypes {
         return match ? new Date(match[1], match[2] - 1, match[3]) : undefined;
       },
       is: (val) => val instanceof Date && !isNaN(val.valueOf()),
-      equals(a, b) { return this.is(a) && this.is(b) && a.toISOString() === b.toISOString(); },
+      equals(l, r) {
+        return ['getFullYear', 'getMonth', 'getDate']
+            .reduce((acc, fn) => acc && l[fn]() === r[fn](), true)
+      },
       pattern: /[0-9]{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|[1-2][0-9]|3[0-1])/,
       capture: /([0-9]{4})-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])/
     },

test/paramSpec.ts

@@ -0,0 +1,35 @@
+import {ParamTypes} from "../src/core";
+
+describe('parameters', () => {
+  let types;
+
+  beforeEach(() => types = new ParamTypes());
+
+  describe('date type', () => {
+    let dateType;
+    beforeEach(() => dateType = types.type("date"));
+
+    it('should compare dates', () => {
+      let date1 = new Date('2010-01-01');
+      let date2 = new Date('2010-01-01');
+
+      let date3 = new Date('2010-02-01');
+
+      expect(dateType.equals(date1, date2)).toBeTruthy();
+      expect(dateType.equals(date1, date3)).toBeFalsy();
+    });
+
+    it('should compare year/month/day only', () => {
+      let date1 = new Date('2010-01-01');
+      date1.setHours(1);
+      let date2 = new Date('2010-01-01');
+      date2.setHours(2);
+      let date3 = new Date('2010-02-01');
+      date3.setHours(3);
+
+      // Failing test case for #2484
+      expect(dateType.equals(date1, date2)).toBeTruthy();
+      expect(dateType.equals(date1, date3)).toBeFalsy();
+    });
+  });
+});