test(Number): add.

src/test/number.spec.ts

@@ -0,0 +1,33 @@
+// @angular-package/testing.
+import { Testing, TestingToBeMatchers } from '@angular-package/testing';
+// Class.
+import { Number } from '../lib/number.class';
+
+// Initialize.
+const testing = new Testing(true, true);
+const toBe = new TestingToBeMatchers();
+
+testing.describe(`Number.`, () => {
+
+  let min = Math.floor(Math.random() * 10);
+  let max = Math.floor(Math.random() * 100) + 11;
+  let minimum = new Number(min);
+
+  beforeEach(() => {
+    min = Math.floor(Math.random() * 10);
+    max = Math.floor(Math.random() * 100) + 11;
+    minimum = new Number(min);
+  });
+
+  testing
+    .toBeClass(Number)
+    .toBeNumberType(new Number(min).valueOf())
+    .toEqual(`Must be equal to ${min}`, new Number(min).valueOf(), min)
+
+    .it(`.create()`, () => {
+      const customNumber = Number.create(min);
+      toBe
+        .instance(customNumber, Number)
+        .numberBetween(customNumber.valueOf(), min, max);
+    });
+});