refactor promise, geneerators, global object

1-js/06-advanced-functions/13-generators/01-pseudo-random-generator/_js.view/test.js

@@ -0,0 +1,21 @@
+describe("pseudoRandom", function() {
+
+  it("follows the formula", function() {
+    let generator = pseudoRandom(1);
+
+    assert.equal(generator.next().value, 16807);
+    assert.equal(generator.next().value, 282475249);
+    assert.equal(generator.next().value, 1622650073);
+  });
+
+
+  it("returns same value for the same seed", function() {
+    let generator1 = pseudoRandom(123);
+    let generator2 = pseudoRandom(123);
+
+    assert.deepEqual(generator1.next(), generator2.next());
+    assert.deepEqual(generator1.next(), generator2.next());
+    assert.deepEqual(generator1.next(), generator2.next());
+  });
+
+});