add toCloseTo2DArray custom matcher

Author: etpinard

test/jasmine/assets/custom_matchers.js

@@ -4,9 +4,7 @@ module.exports = {
     toBeCloseToArray: function() {
         return {
             compare: function(actual, expected, precision) {
-                if(precision !== 0) {
-                    precision = Math.pow(10, -precision) / 2 || 0.005;
-                }
+                precision = coercePosition(precision);
 
                 var tested = actual.map(function(element, i) {
                     return Math.abs(expected[i] - element) < precision;
@@ -23,5 +21,59 @@ module.exports = {
                 };
             }
         };
-    }
+    },
+
+    // toBeCloseTo... but for 2D arrays
+    toBeCloseTo2DArray: function() {
+        return {
+            compare: function(actual, expected, precision) {
+                precision = coercePosition(precision);
+
+                var passed = true;
+
+                if(expected.length !== actual.length) passed = false;
+                else {
+                    for(var i = 0; i < expected.length; ++i) {
+                        if(expected[i].length !== actual[i].length) {
+                            passed = false;
+                            break;
+                        }
+
+                        for(var j = 0; j < expected[i].length; ++j) {
+                            var isClose = Math.abs(expected[i][j] - actual[i][j]) < precision;
+
+                            if(!isClose) {
+                                passed = false;
+                                break;
+                            }
+                        }
+                    }
+                }
+
+                var message = [
+                    'Expected',
+                    arrayToStr(actual.map(arrayToStr)),
+                    'to be close to',
+                    arrayToStr(expected.map(arrayToStr))
+                ].join(' ');
+
+                return {
+                    pass: passed,
+                    message: message
+                };
+            }
+        };
+    },
 };
+
+function coercePosition(precision) {
+    if(precision !== 0) {
+        precision = Math.pow(10, -precision) / 2 || 0.005;
+    }
+
+    return precision;
+}
+
+function arrayToStr(array) {
+    return '[ ' + array.join(', ') + ' ]';
+}