Squashed 'lib/vis/' content from commit 1d029ca

git-subtree-dir: lib/vis
git-subtree-split: 1d029cab7b527f3b292e95d550efbf784dac8699

test/Queue.test.js

@@ -0,0 +1,160 @@
+var assert = require('assert');
+var Queue = require('../lib/Queue');
+
+describe('Queue', function () {
+  it('queue actions', function () {
+    var queue = new Queue();
+
+    var count = 0;
+    function inc() {
+      count++;
+    }
+
+    queue.queue(inc);
+    assert.equal(count, 0);
+
+    queue.flush();
+    assert.equal(count, 1);
+  });
+
+  it('queue actions with a delay', function (done) {
+    var queue = new Queue({delay: 25});
+
+    var count = 0;
+    function inc() {
+      count++;
+    }
+
+    queue.queue(inc);
+    assert.equal(count, 0);
+
+    setTimeout(function () {
+      assert.equal(count, 1);
+
+      done();
+    }, 50);
+  });
+
+  it('queue multiple actions with a delay', function (done) {
+    var queue = new Queue({delay: 100});
+
+    var count = 0;
+    function inc() {
+      count++;
+    }
+
+    queue.queue(inc);
+    assert.equal(count, 0);
+
+    setTimeout(function () {
+      queue.queue(inc);
+      assert.equal(count, 0);
+
+      // flush should now occur after 100 ms from now, lets test after 75 and 125 ms
+      setTimeout(function () {
+        assert.equal(count, 0);
+
+        setTimeout(function () {
+          assert.equal(count, 2);
+
+          done();
+        }, 50);
+      }, 75);
+    }, 50);
+  });
+
+  it('flush when the configured maximum is exceeded', function () {
+    var queue = new Queue({max: 4});
+
+    var count = 0;
+    function inc() {
+      count++;
+    }
+
+    queue.queue(inc);
+    queue.queue(inc);
+    assert.equal(count, 0);
+
+    queue.queue(inc);
+    queue.queue(inc);
+    queue.queue(inc);
+    assert.equal(count, 5);
+  });
+
+  it('queue actions with args', function () {
+    var queue = new Queue();
+
+    var count = 0;
+    function add(value) {
+      count += value;
+    }
+
+    queue.queue({fn: add, args: [2]});
+    assert.equal(count, 0);
+
+    queue.flush();
+    assert.equal(count, 2);
+  });
+
+  it('queue actions with args and context', function () {
+    var queue = new Queue();
+
+    var obj = {
+      count: 0,
+      add: function (value) {
+        this.count += value;
+      }
+    };
+
+    queue.queue({context: obj, fn: obj.add, args: [2]});
+    assert.equal(obj.count, 0);
+
+    queue.flush();
+    assert.equal(obj.count, 2);
+  });
+
+  it('replace functions on an object', function () {
+    var queue = new Queue();
+
+    var obj = {
+      count: 0,
+      add: function (value) {
+        this.count += value;
+      }
+    };
+
+    queue.replace(obj, 'add');
+
+    obj.add(3);
+    assert.equal(obj.count, 0);
+
+    queue.flush();
+    assert.equal(obj.count, 3);
+  });
+
+  it('extend an object', function () {
+    var obj = {
+      count: 0,
+      add: function (value) {
+        this.count += value;
+      },
+      subtract: function (value) {
+        this.count -= value;
+      }
+    };
+
+    Queue.extend(obj, {replace: ['add', 'subtract']});
+
+    obj.add(3);
+    obj.subtract(1);
+    assert.equal(obj.count, 0);
+
+    obj.flush();
+    assert.equal(obj.count, 2);
+  });
+
+  // TODO: test Queue.setOptions
+
+  // TODO: test Queue.destroy
+
+});