Added some tests

Author: jabbany

dist/CommentCoreLibrary.js

@@ -265,6 +265,9 @@ var CommentUtils;
         Matrix3D.identity = function () {
             return new Matrix3D([1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]);
         };
+        Matrix3D.createScaleMatrix = function (xscale, yscale, zscale) {
+            return new Matrix3D([xscale, 0, 0, 0, 0, yscale, 0, 0, 0, 0, zscale, 0, 0, 0, 0, 1]);
+        };
         Matrix3D.createRotationMatrix = function (xrot, yrot, zrot) {
             var DEG2RAD = Math.PI / 180;
             var yr = yrot * DEG2RAD;
@@ -277,7 +280,9 @@ var CommentUtils;
                 (-SIN(yr) * COS(zr)), (-SIN(yr) * SIN(zr)), COS(yr), 0,
                 0, 0, 0, 1
             ];
-            return new Matrix3D(matrix);
+            return new Matrix3D(matrix.map(function (v) {
+                return Math.round(v * 1e10) * 1e-10;
+            }));
         };
         return Matrix3D;
     }());
@@ -805,6 +810,9 @@ var CommentUtils;
         Matrix3D.identity = function () {
             return new Matrix3D([1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]);
         };
+        Matrix3D.createScaleMatrix = function (xscale, yscale, zscale) {
+            return new Matrix3D([xscale, 0, 0, 0, 0, yscale, 0, 0, 0, 0, zscale, 0, 0, 0, 0, 1]);
+        };
         Matrix3D.createRotationMatrix = function (xrot, yrot, zrot) {
             var DEG2RAD = Math.PI / 180;
             var yr = yrot * DEG2RAD;
@@ -817,7 +825,9 @@ var CommentUtils;
                 (-SIN(yr) * COS(zr)), (-SIN(yr) * SIN(zr)), COS(yr), 0,
                 0, 0, 0, 1
             ];
-            return new Matrix3D(matrix);
+            return new Matrix3D(matrix.map(function (v) {
+                return Math.round(v * 1e10) * 1e-10;
+            }));
         };
         return Matrix3D;
     }());

dist/CommentCoreLibrary.min.js

@@ -0,0 +1,50 @@
+'use strict'
+describe 'CommentUtils', ->
+  describe 'Matrix3D', ->
+    describe 'identity', ->
+      it 'returns identity matrix', ->
+        expect(CommentUtils.Matrix3D.identity().isIdentity()).toBe true
+
+    describe 'createScaleMatrix', ->
+      it 'returns identity matrix', ->
+        expect(CommentUtils.Matrix3D.createScaleMatrix(1, 1, 1).isIdentity()).toBe true
+      
+      it 'returns proper scale matrix', ->
+        expect(CommentUtils.Matrix3D.createScaleMatrix(1, 2, 3).flatArray).toEqual [1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 3, 0, 0, 0, 0, 1]
+
+    describe 'createRotationMatrix', ->
+      it 'returns identity matrix if no rotation', ->
+        expect(CommentUtils.Matrix3D.createRotationMatrix(0, 0, 0).isIdentity()).toBe true
+
+      it 'returns identity matrix if rotating 360 degrees', ->
+        expect(CommentUtils.Matrix3D.createRotationMatrix(360, 0, 0).isIdentity()).toBe true
+        expect(CommentUtils.Matrix3D.createRotationMatrix(0, 360, 0).isIdentity()).toBe true
+        expect(CommentUtils.Matrix3D.createRotationMatrix(0, 0, 360).isIdentity()).toBe true
+
+    describe 'constructor', -> 
+      it 'throws error if constructed improper dimensions', ->
+        expect( => new CommentUtils.Matrix3D([1, 2, 3])).toThrow()
+
+    describe 'instance API', ->
+      m = null
+      n = null
+      mdotn = null
+      beforeEach ->
+        m = new CommentUtils.Matrix3D [1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6]
+        n = CommentUtils.Matrix3D.createScaleMatrix 6, 7, 8
+        mdotn = new CommentUtils.Matrix3D [6, 14, 24, 4, 30, 42, 56, 8, 54, 0, 8, 2, 18, 28, 40, 6]
+
+      it 'gets flatArray', ->
+        expect(m.flatArray).toEqual [1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6]
+
+      it 'cannot set flatArray', ->
+        expect( => m.flatArray = []).toThrow()
+
+      it 'checks identity', ->
+        expect(m.isIdentity()).toBe false
+
+      it 'dot product', ->
+        expect(m.dot(n).equals mdotn).toBe true
+
+      it 'toCss', ->
+        expect(n.toCss()).toBe 'matrix3d(6,0,0,0,0,7,0,0,0,0,8,0,0,0,0,1)'

spec/core/Utils_spec.coffee

@@ -13,6 +13,10 @@ module CommentUtils {
             return new Matrix3D([1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]);
         };
 
+        public static createScaleMatrix:Function = function (xscale:number, yscale:number, zscale:number):Matrix3D {
+            return new Matrix3D([xscale, 0, 0, 0, 0, yscale, 0, 0, 0, 0, zscale, 0, 0, 0, 0, 1]);
+        };
+
         public static createRotationMatrix:Function = function (xrot:number, yrot:number, zrot:number):Matrix3D {
             // Courtesy of @StarBrilliant, re-adapted for general case
             var DEG2RAD = Math.PI/180;
@@ -26,7 +30,10 @@ module CommentUtils {
                 (-SIN(yr) * COS(zr)) , (-SIN(yr) * SIN(zr))  , COS(yr)  , 0,
                 0                    , 0                     , 0        , 1
             ];
-            return new Matrix3D(matrix);
+            // Do some rounding
+            return new Matrix3D(matrix.map(function (v) {
+                return Math.round(v * 1e10) * 1e-10;
+            }));
         };
 
         /**