From 847fe90c4bc055034e5e4581a417e97e2ccdfab9 Mon Sep 17 00:00:00 2001
From: Andrea Bogazzi <andreabogazzi79@gmail.com>
Date: Sun, 28 Oct 2018 21:46:32 +0100
Subject: [PATCH] added some tests for fabric.util (#5349)

* added some tests

* test
---
 src/util/misc.js  |  2 +-
 test/unit/util.js | 79 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+), 1 deletion(-)

diff --git a/src/util/misc.js b/src/util/misc.js
index 2f830e87..03902d58 100644
--- a/src/util/misc.js
+++ b/src/util/misc.js
@@ -588,7 +588,7 @@
      * @return {CanvasElement} initialized canvas element
      */
     copyCanvasElement: function(canvas) {
-      var newCanvas = fabric.document.createElement('canvas');
+      var newCanvas = fabric.util.createCanvasElement();
       newCanvas.width = canvas.width;
       newCanvas.height = canvas.height;
       newCanvas.getContext('2d').drawImage(canvas, 0, 0);
diff --git a/test/unit/util.js b/test/unit/util.js
index f8e497c1..bd1c21bb 100644
--- a/test/unit/util.js
+++ b/test/unit/util.js
@@ -993,4 +993,83 @@
     assert.equal(fabric.util.cos(Math.PI), -1, 'cos 180 correct');
     assert.equal(fabric.util.cos(3 * Math.PI / 2), 0,' cos 270 correct');
   });
+
+  QUnit.test('fabric.util.getSvgAttributes', function(assert) {
+    assert.ok(typeof fabric.util.getSvgAttributes === 'function');
+    assert.deepEqual(fabric.util.getSvgAttributes(''),
+      ['instantiated_by_use', 'style', 'id', 'class'], 'common attribs');
+    assert.deepEqual(fabric.util.getSvgAttributes('linearGradient'),
+      ['instantiated_by_use', 'style', 'id', 'class', 'x1', 'y1', 'x2', 'y2', 'gradientUnits', 'gradientTransform'],
+      'linearGradient attribs');
+    assert.deepEqual(fabric.util.getSvgAttributes('radialGradient'),
+      ['instantiated_by_use', 'style', 'id', 'class', 'gradientUnits', 'gradientTransform', 'cx', 'cy', 'r', 'fx', 'fy', 'fr'],
+      'radialGradient attribs');
+    assert.deepEqual(fabric.util.getSvgAttributes('stop'),
+      ['instantiated_by_use', 'style', 'id', 'class', 'offset', 'stop-color', 'stop-opacity'],
+      'stop attribs');
+  });
+
+  QUnit.test('fabric.util.enlivenPatterns', function(assert) {
+    assert.ok(typeof fabric.util.enlivenPatterns === 'function');
+    fabric.util.enlivenPatterns([], function() {
+      assert.ok(true, 'callBack is called when no patterns are available');
+    });
+  });
+
+  QUnit.test('fabric.util.copyCanvasElement', function(assert) {
+    assert.ok(typeof fabric.util.copyCanvasElement === 'function');
+    var c = fabric.util.createCanvasElement();
+    c.width = 10;
+    c.height = 20;
+    c.getContext('2d').fillStyle = 'red';
+    c.getContext('2d').fillRect(0, 0, 10, 10);
+    var b = fabric.util.copyCanvasElement(c);
+    assert.equal(b.width, 10, 'width has been copied');
+    assert.equal(b.height, 20, 'height has been copied');
+    var data = b.getContext('2d').getImageData(1,1,1,1).data;
+    assert.equal(data[0], 255, 'red color has been copied');
+    assert.equal(data[1], 0, 'red color has been copied');
+    assert.equal(data[2], 0, 'red color has been copied');
+    assert.equal(data[3], 255, 'red color has been copied');
+  });
+
+  QUnit.test('fabric.util.findScaleToCover', function(assert) {
+    assert.ok(typeof fabric.util.findScaleToCover === 'function');
+    var scale = fabric.util.findScaleToCover({
+      width: 100,
+      height: 200,
+    }, {
+      width: 50,
+      height: 50,
+    });
+    assert.equal(scale, 0.5, 'scaleToCover is 0.5');
+    var scale = fabric.util.findScaleToCover({
+      width: 10,
+      height: 25,
+    }, {
+      width: 50,
+      height: 50,
+    });
+    assert.equal(scale, 5, 'scaleToCover is 5');
+  });
+
+  QUnit.test('fabric.util.findScaleToFit', function(assert) {
+    assert.ok(typeof fabric.util.findScaleToFit === 'function');
+    var scale = fabric.util.findScaleToFit({
+      width: 100,
+      height: 200,
+    }, {
+      width: 50,
+      height: 50,
+    });
+    assert.equal(scale, 0.25, 'findScaleToFit is 0.25');
+    var scale = fabric.util.findScaleToFit({
+      width: 10,
+      height: 25,
+    }, {
+      width: 50,
+      height: 50,
+    });
+    assert.equal(scale, 2, 'findScaleToFit is 2');
+  });
 })();