RUlist-test.js josecelano

josecelano

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+/*global describe, it, before */
+
+"use strict";
+
+var buster = require("buster");
+var RUList = require("../lib/RUList");
+
+buster.spec.expose();
+var expect = buster.expect;
+
+describe("Recently-Used List", function() {
+    before(function() {
+        this.list = new RUList();
+    });
+
+    it("is initially empty", function() {
+        expect(this.list.length).toEqual(0);
+    });
+
+    it("adds items in reverse order", function() {
+        this.list.add('one');
+        this.list.add('two');
+
+        expect(this.list.get(0)).toEqual('two');
+    });
+
+    it("an item exists only once", function() {
+        this.list.add('one');
+        this.list.add('one');
+
+        expect(this.list.length).toEqual(1);
+    });
+
+    it("items count always less than eleven", function() {
+        for(var i = 1; i < 12; i++) {
+            this.list.add(i);
+        }
+
+        expect(this.list.length).toEqual(10);
+    });
+
+    it("new element replaces last when list is full", function() {
+        for(var i = 1; i <= 11; i++) {
+            this.list.add(i);
+        }
+
+        expect(this.list.get(0)).toEqual(11);
+    });
+
+    it("last element disappears when list is full", function() {
+        for(var i = 1; i <= 11; i++) {
+            this.list.add(i);
+        }
+
+        expect(this.list.get(9)).toEqual(2);
+    });
+
+
+});