(function(){

  var canvas = new fabric.Canvas();

  QUnit.module('iText click interaction', {
    afterEach: function() {
      canvas.clear();
      canvas.cancelRequestedRender();
    }
  });
  QUnit.test('_getNewSelectionStartFromOffset end of line', function(assert) {
    var iText = new fabric.IText('test need some word\nsecond line');
    var index = 10;
    var jlen = 20;
    var selection = iText._getNewSelectionStartFromOffset({ y: 1, x: 1000 }, 500, 520, index, jlen);
    assert.equal(selection, index, 'index value did not change');
  });
  QUnit.test('_getNewSelectionStartFromOffset middle of line', function(assert) {
    var iText = new fabric.IText('test need some word\nsecond line');
    var index = 10;
    var jlen = 20;
    var selection = iText._getNewSelectionStartFromOffset({ y: 1, x: 519 }, 500, 520, index, jlen);
    assert.equal(selection, index + 1, 'index value was moved to next char, since is very near');
  });
  QUnit.test('_getNewSelectionStartFromOffset middle of line', function(assert) {
    var iText = new fabric.IText('test need some word\nsecond line');
    var index = 10;
    var jlen = 20;
    var selection = iText._getNewSelectionStartFromOffset({ y: 1, x: 502 }, 500, 520, index, jlen);
    assert.equal(selection, index, 'index value was NOT moved to next char, since is very near to first one');
  });
  QUnit.test('_getNewSelectionStartFromOffset middle of line', function(assert) {
    var iText = new fabric.IText('test need some word\nsecond line');
    var index = 10;
    var jlen = 10;
    var selection = iText._getNewSelectionStartFromOffset({ y: 1, x: 1000 }, 500, 520, index, jlen);
    assert.equal(selection, index, 'index value was NOT moved to next char, since is already at end of text');
  });
  QUnit.test('_mouseDownHandlerBefore set up selected property', function(assert) {
    var iText = new fabric.IText('test need some word\nsecond line');
    assert.equal(iText.selected, undefined, 'iText has no selected property');
    canvas.setActiveObject(iText);
    iText.canvas = canvas;
    iText._mouseDownHandlerBefore({ e: {} });
    assert.equal(iText.selected, true, 'iText has selected property');
    assert.equal(iText.__lastSelected, undefined, 'iText has no __lastSelected property');
  });
  QUnit.test('_mouseUpHandler set selected as true', function(assert) {
    var iText = new fabric.IText('test');
    iText.initDelayedCursor = function() {};
    iText.renderCursorOrSelection = function() {};
    assert.equal(iText.selected, undefined, 'iText has no selected property');
    assert.equal(iText.__lastSelected, undefined, 'iText has no __lastSelected property');
    canvas.setActiveObject(iText);
    iText.canvas = canvas;
    iText.mouseUpHandler({ e: {} });
    assert.equal(iText.selected, true, 'iText has selected property');
  });
  QUnit.test('_mouseUpHandler on a selected object enter edit', function(assert) {
    var iText = new fabric.IText('test');
    iText.initDelayedCursor = function() {};
    iText.renderCursorOrSelection = function() {};
    assert.equal(iText.isEditing, false, 'iText not editing');
    iText.canvas = canvas;
    canvas._activeObject = null;
    iText.selected = true;
    iText.__lastSelected = true;
    iText.mouseUpHandler({ e: {} });
    assert.equal(iText.isEditing, true, 'iText entered editing');
    iText.exitEditing();
  });
  QUnit.test('_mouseUpHandler on a selected object does enter edit if there is an activeObject', function(assert) {
    var iText = new fabric.IText('test');
    iText.initDelayedCursor = function() {};
    iText.renderCursorOrSelection = function() {};
    assert.equal(iText.isEditing, false, 'iText not editing');
    iText.canvas = canvas;
    canvas._activeObject = new fabric.IText('test2');
    iText.selected = true;
    iText.__lastSelected = true;
    iText.mouseUpHandler({ e: {} });
    assert.equal(iText.isEditing, false, 'iText did not enter editing');
    iText.exitEditing();
  });
  QUnit.test('_mouseUpHandler on a selected text in a group DOES NOT enter edit', function(assert) {
    var iText = new fabric.IText('test');
    iText.initDelayedCursor = function() {};
    iText.renderCursorOrSelection = function() {};
    assert.equal(iText.isEditing, false, 'iText not editing');
    iText.canvas = canvas;
    iText.selected = true;
    iText.__lastSelected = true;
    iText.group = true;
    iText.mouseUpHandler({ e: {} });
    assert.equal(iText.isEditing, false, 'iText did not entered editing');
    iText.exitEditing();
  });
  QUnit.test('_mouseUpHandler on a corner of selected text DOES NOT enter edit', function(assert) {
    var iText = new fabric.IText('test');
    iText.initDelayedCursor = function() {};
    iText.renderCursorOrSelection = function() {};
    assert.equal(iText.isEditing, false, 'iText not editing');
    iText.canvas = canvas;
    iText.selected = true;
    iText.__lastSelected = true;
    iText.__corner = 'mt';
    iText.mouseUpHandler({ e: {} });
    assert.equal(iText.isEditing, false, 'iText did not entered editing');
    iText.exitEditing();
  });
  QUnit.test('click on editing itext make selection:changed fire', function(assert) {
    var done = assert.async();
    var eventData = {
      which: 1,
      target: canvas.upperCanvasEl,
      clientX: 30,
      clientY: 10
    };
    var count = 0;
    var countCanvas = 0;
    var iText = new fabric.IText('test test');
    canvas.on('text:selection:changed', function() {
      countCanvas++;
    });
    iText.on('selection:changed', function() {
      count++;
    });
    canvas.add(iText);
    assert.equal(canvas.getActiveObject(), null, 'no active object exist');
    assert.equal(count, 0, 'no selection:changed fired yet');
    assert.equal(countCanvas, 0, 'no text:selection:changed fired yet');
    canvas._onMouseDown(eventData);
    canvas._onMouseUp(eventData);
    assert.equal(canvas.getActiveObject(), iText, 'Itext got selected');
    assert.equal(iText.isEditing, false, 'Itext is not editing yet');
    assert.equal(count, 0, 'no selection:changed fired yet');
    assert.equal(countCanvas, 0, 'no text:selection:changed fired yet');
    assert.equal(iText.selectionStart, 0, 'Itext did not set the selectionStart');
    assert.equal(iText.selectionEnd, 0, 'Itext did not set the selectionend');
    // make a little delay or it will act as double click and select everything
    setTimeout(function() {
      canvas._onMouseDown(eventData);
      canvas._onMouseUp(eventData);
      assert.equal(iText.isEditing, true, 'Itext entered editing');
      assert.equal(iText.selectionStart, 2, 'Itext set the selectionStart');
      assert.equal(iText.selectionEnd, 2, 'Itext set the selectionend');
      assert.equal(count, 1, 'no selection:changed fired yet');
      assert.equal(countCanvas, 1, 'no text:selection:changed fired yet');
      done();
    }, 500);
  });
})();