Add unit tests.

cms/static/coffee/spec/main.coffee

@@ -34,6 +34,7 @@ requirejs.config({
         "sinon": "xmodule_js/common_static/js/vendor/sinon-1.7.1",
         "squire": "xmodule_js/common_static/js/vendor/Squire",
         "jasmine-jquery": "xmodule_js/common_static/js/vendor/jasmine-jquery",
+        "jasmine-imagediff": "xmodule_js/common_static/js/vendor/jasmine-imagediff",
         "jasmine-stealth": "xmodule_js/common_static/js/vendor/jasmine-stealth",
         "jasmine.async": "xmodule_js/common_static/js/vendor/jasmine.async",
         "draggabilly": "xmodule_js/common_static/js/vendor/draggabilly.pkgd",
@@ -151,6 +152,9 @@ requirejs.config({
         "jasmine-jquery": {
             deps: ["jasmine"]
         },
+        "jasmine-imagediff": {
+            deps: ["jasmine"]
+        },
         "jasmine-stealth": {
             deps: ["jasmine"]
         },

cms/static/js_test.yml

@@ -47,6 +47,7 @@ lib_paths:
     - xmodule_js/common_static/js/vendor/Squire.js
     - xmodule_js/common_static/js/vendor/jasmine-jquery.js
     - xmodule_js/common_static/js/vendor/jasmine-stealth.js
+    - xmodule_js/common_static/js/vendor/jasmine-imagediff.js
     - xmodule_js/common_static/js/vendor/jasmine.async.js
     - xmodule_js/common_static/js/vendor/jquery.maskedinput.min.js
     - xmodule_js/common_static/js/vendor/CodeMirror/codemirror.js

cms/static/js_test_squire.yml

@@ -46,6 +46,7 @@ lib_paths:
     - xmodule_js/common_static/js/vendor/Squire.js
     - xmodule_js/common_static/js/vendor/jasmine-jquery.js
     - xmodule_js/common_static/js/vendor/jasmine-stealth.js
+    - xmodule_js/common_static/js/vendor/jasmine-imagediff.js
     - xmodule_js/common_static/js/vendor/jasmine.async.js
     - xmodule_js/common_static/js/vendor/CodeMirror/codemirror.js
     - xmodule_js/src/xmodule.js

common/lib/xmodule/xmodule/js/js_test.yml

@@ -36,6 +36,7 @@ lib_paths:
     - common_static/coffee/src/ajax_prefix.js
     - common_static/coffee/src/logger.js
     - common_static/js/vendor/jasmine-jquery.js
+    - common_static/js/vendor/jasmine-imagediff.js
     - common_static/js/vendor/require.js
     - RequireJS-namespace-undefine.js
     - common_static/js/vendor/jquery.min.js

common/lib/xmodule/xmodule/js/spec/capa/display_spec.coffee

@@ -303,6 +303,114 @@ describe 'Problem', ->
           expect($('input#1_2_1_choiceinput_2bc').attr('disabled')).not.toEqual('disabled')
           expect($('input#1_2_1').attr('disabled')).not.toEqual('disabled')
 
+      describe 'imageinput', ->
+        imageinput_html='''
+  <section class="problem">
+    <div class="imageinput capa_inputtype" id="inputtype_1_2_1">
+      <input class="imageinput" type="hidden" name="input_1_2_1" id="input_1_2_1">
+      <div style="position:relative;">
+        <div id="imageinput_1_2_1">test</div>
+        <div id="answer_1_2_1" data-width="100" data-height="100"></div>
+      </div>
+    </div>
+  </section>
+  '''
+        states = [
+          {
+            desc: 'rectangle is drawn correctly',
+            data: {'rectangle': '(10,10)-(30,30)'}
+          },
+          {
+            desc: 'region is drawn correctly',
+            data: {'regions': '[[10,10],[30,30],[70,30],[20,30]]'}
+          },
+          {
+            desc: 'mixed shapes are drawn correctly',
+            data: {
+              'rectangle': '(10,10)-(30,30);(5,5)-(20,20)',
+              'regions': '''[
+                [[50,50],[40,40],[70,30],[50,70]],
+                [[90,95],[95,95],[90,70],[70,70]]
+              ]'''
+            }
+          },
+        ]
+
+        beforeEach ->
+          @problem = new Problem($('.xblock-student_view'))
+          @problem.el.prepend imageinput_html
+
+        stubRequest = (data) =>
+          spyOn($, 'postWithPrefix').andCallFake (url, callback) ->
+              callback answers: "1_2_1": data
+
+        getImage = (coords, c_width, c_height) =>
+          types =
+            rectangle: (coords) =>
+              reg = /^\(([0-9]+),([0-9]+)\)-\(([0-9]+),([0-9]+)\)$/
+              rects = coords.replace(/\s*/g, '').split(/;/)
+
+              $.each rects, (index, rect) =>
+                abs = Math.abs
+                points = reg.exec(rect)
+                if points
+                  # width
+                  width = abs(points[3] - points[1])
+                  # height
+                  height = abs(points[4] - points[2])
+
+                  ctx.rect(points[1], points[2], width, height)
+
+              ctx.stroke()
+              ctx.fill()
+
+            regions: (coords) =>
+              parseCoords = (coords) =>
+                reg = JSON.parse(coords)
+
+                if typeof reg[0][0][0] == "undefined"
+                  reg = [reg]
+
+                return reg
+
+              $.each parseCoords(coords), (index, region) =>
+                ctx.beginPath()
+                $.each region, (index, point) =>
+                  if index is 0
+                    ctx.moveTo(point[0], point[1])
+                  else
+                    ctx.lineTo(point[0], point[1]);
+
+                ctx.closePath()
+                ctx.stroke()
+                ctx.fill()
+
+          canvas = document.createElement('canvas')
+          canvas.width = c_width or 100
+          canvas.height = c_height or 100
+
+          if canvas.getContext
+            ctx = canvas.getContext('2d')
+          else
+            return console.log 'Canvas is not supported.'
+
+          ctx.fillStyle = 'rgba(255,255,255,.3)';
+          ctx.strokeStyle = "#FF0000";
+          ctx.lineWidth = "2";
+
+          $.each coords, (key, value) =>
+            types[key](value) if types[key]?
+
+          return canvas
+
+        $.each states, (index, state) =>
+          it state.desc, ->
+            stubRequest(state.data)
+            @problem.show()
+            img = getImage(state.data)
+
+            expect(img).toImageDiffEqual($('canvas')[0])
+
     describe 'when the answers are already shown', ->
       beforeEach ->
         @problem.el.addClass 'showed'
@@ -409,4 +517,3 @@ describe 'Problem', ->
       expect(@problem.answers).toEqual "input_1_1=one&input_1_2=two"
 
 
-

common/lib/xmodule/xmodule/js/spec/helper.coffee

@@ -162,6 +162,8 @@ beforeEach ->
     toBeInArray: (array) ->
       return $.inArray(@.actual, array) > -1
 
+  @addMatchers imagediff.jasmine
+
 # Stub jQuery.cookie
 $.cookie = jasmine.createSpy('jQuery.cookie').andReturn '1.0'
 

common/lib/xmodule/xmodule/js/src/capa/display.coffee

@@ -506,18 +506,18 @@ class @Problem
           parseCoords = (coords) =>
             reg = JSON.parse(coords)
 
-            if typeof reg[0][0] is undefined
+            if typeof reg[0][0][0] == "undefined"
               reg = [reg]
 
             return reg
 
-          $.each parseCoords(coords), (index, regions) =>
+          $.each parseCoords(coords), (index, region) =>
             ctx.beginPath()
-            $.each regions, (index, points) =>
+            $.each region, (index, point) =>
               if index is 0
-                ctx.moveTo(points[0], points[1])
+                ctx.moveTo(point[0], point[1])
               else
-                ctx.lineTo(points[0], points[1]);
+                ctx.lineTo(point[0], point[1]);
 
             ctx.closePath()
             ctx.stroke()

common/static/js/vendor/jasmine-imagediff.js

+// js-imagediff 1.0.3
+// (c) 2011-2012 Carl Sutherland, Humble Software
+// Distributed under the MIT License
+// For original source and documentation visit:
+// http://www.github.com/HumbleSoftware/js-imagediff
+
+(function (name, definition) {
+  var root = this;
+  if (typeof module !== 'undefined') {
+    var Canvas = require('canvas');
+    module.exports = definition(root, name, Canvas);
+  } else if (typeof define === 'function' && typeof define.amd === 'object') {
+    define(definition);
+  } else {
+    root[name] = definition(root, name);
+  }
+})('imagediff', function (root, name, Canvas) {
+
+  var
+    TYPE_ARRAY        = /\[object Array\]/i,
+    TYPE_CANVAS       = /\[object (Canvas|HTMLCanvasElement)\]/i,
+    TYPE_CONTEXT      = /\[object CanvasRenderingContext2D\]/i,
+    TYPE_IMAGE        = /\[object (Image|HTMLImageElement)\]/i,
+    TYPE_IMAGE_DATA   = /\[object ImageData\]/i,
+
+    UNDEFINED         = 'undefined',
+
+    canvas            = getCanvas(),
+    context           = canvas.getContext('2d'),
+    previous          = root[name],
+    imagediff, jasmine;
+
+  // Creation
+  function getCanvas (width, height) {
+    var
+      canvas = Canvas ?
+        new Canvas() :
+        document.createElement('canvas');
+    if (width) canvas.width = width;
+    if (height) canvas.height = height;
+    return canvas;
+  }
+  function getImageData (width, height) {
+    canvas.width = width;
+    canvas.height = height;
+    context.clearRect(0, 0, width, height);
+    return context.createImageData(width, height);
+  }
+
+
+  // Type Checking
+  function isImage (object) {
+    return isType(object, TYPE_IMAGE);
+  }
+  function isCanvas (object) {
+    return isType(object, TYPE_CANVAS);
+  }
+  function isContext (object) {
+    return isType(object, TYPE_CONTEXT);
+  }
+  function isImageData (object) {
+    return !!(object &&
+      isType(object, TYPE_IMAGE_DATA) &&
+      typeof(object.width) !== UNDEFINED &&
+      typeof(object.height) !== UNDEFINED &&
+      typeof(object.data) !== UNDEFINED);
+  }
+  function isImageType (object) {
+    return (
+      isImage(object) ||
+      isCanvas(object) ||
+      isContext(object) ||
+      isImageData(object)
+    );
+  }
+  function isType (object, type) {
+    return typeof (object) === 'object' && !!Object.prototype.toString.apply(object).match(type);
+  }
+
+
+  // Type Conversion
+  function copyImageData (imageData) {
+    var
+      height = imageData.height,
+      width = imageData.width,
+      data = imageData.data,
+      newImageData, newData, i;
+
+    canvas.width = width;
+    canvas.height = height;
+    newImageData = context.getImageData(0, 0, width, height);
+    newData = newImageData.data;
+
+    for (i = imageData.data.length; i--;) {
+        newData[i] = data[i];
+    }
+
+    return newImageData;
+  }
+  function toImageData (object) {
+    if (isImage(object)) { return toImageDataFromImage(object); }
+    if (isCanvas(object)) { return toImageDataFromCanvas(object); }
+    if (isContext(object)) { return toImageDataFromContext(object); }
+    if (isImageData(object)) { return object; }
+  }
+  function toImageDataFromImage (image) {
+    var
+      height = image.height,
+      width = image.width;
+    canvas.width = width;
+    canvas.height = height;
+    context.clearRect(0, 0, width, height);
+    context.drawImage(image, 0, 0);
+    return context.getImageData(0, 0, width, height);
+  }
+  function toImageDataFromCanvas (canvas) {
+    var
+      height = canvas.height,
+      width = canvas.width,
+      context = canvas.getContext('2d');
+    return context.getImageData(0, 0, width, height);
+  }
+  function toImageDataFromContext (context) {
+    var
+      canvas = context.canvas,
+      height = canvas.height,
+      width = canvas.width;
+    return context.getImageData(0, 0, width, height);
+  }
+  function toCanvas (object) {
+    var
+      data = toImageData(object),
+      canvas = getCanvas(data.width, data.height),
+      context = canvas.getContext('2d');
+
+    context.putImageData(data, 0, 0);
+    return canvas;
+  }
+
+
+  // ImageData Equality Operators
+  function equalWidth (a, b) {
+    return a.width === b.width;
+  }
+  function equalHeight (a, b) {
+    return a.height === b.height;
+  }
+  function equalDimensions (a, b) {
+    return equalHeight(a, b) && equalWidth(a, b);
+  }
+  function equal (a, b, tolerance) {
+
+    var
+      aData     = a.data,
+      bData     = b.data,
+      length    = aData.length,
+      i;
+
+    tolerance = tolerance || 0;
+
+    if (!equalDimensions(a, b)) return false;
+    for (i = length; i--;) if (aData[i] !== bData[i] && Math.abs(aData[i] - bData[i]) > tolerance) return false;
+
+    return true;
+  }
+
+
+  // Diff
+  function diff (a, b) {
+    return (equalDimensions(a, b) ? diffEqual : diffUnequal)(a, b);
+  }
+  function diffEqual (a, b) {
+
+    var
+      height  = a.height,
+      width   = a.width,
+      c       = getImageData(width, height), // c = a - b
+      aData   = a.data,
+      bData   = b.data,
+      cData   = c.data,
+      length  = cData.length,
+      row, column,
+      i, j, k, v;
+
+    for (i = 0; i < length; i += 4) {
+      cData[i] = Math.abs(aData[i] - bData[i]);
+      cData[i+1] = Math.abs(aData[i+1] - bData[i+1]);
+      cData[i+2] = Math.abs(aData[i+2] - bData[i+2]);
+      cData[i+3] = Math.abs(255 - Math.abs(aData[i+3] - bData[i+3]));
+    }
+
+    return c;
+  }
+  function diffUnequal (a, b) {
+
+    var
+      height  = Math.max(a.height, b.height),
+      width   = Math.max(a.width, b.width),
+      c       = getImageData(width, height), // c = a - b
+      aData   = a.data,
+      bData   = b.data,
+      cData   = c.data,
+      rowOffset,
+      columnOffset,
+      row, column,
+      i, j, k, v;
+
+
+    for (i = cData.length - 1; i > 0; i = i - 4) {
+      cData[i] = 255;
+    }
+
+    // Add First Image
+    offsets(a);
+    for (row = a.height; row--;){
+      for (column = a.width; column--;) {
+        i = 4 * ((row + rowOffset) * width + (column + columnOffset));
+        j = 4 * (row * a.width + column);
+        cData[i+0] = aData[j+0]; // r
+        cData[i+1] = aData[j+1]; // g
+        cData[i+2] = aData[j+2]; // b
+        // cData[i+3] = aData[j+3]; // a
+      }
+    }
+
+    // Subtract Second Image
+    offsets(b);
+    for (row = b.height; row--;){
+      for (column = b.width; column--;) {
+        i = 4 * ((row + rowOffset) * width + (column + columnOffset));
+        j = 4 * (row * b.width + column);
+        cData[i+0] = Math.abs(cData[i+0] - bData[j+0]); // r
+        cData[i+1] = Math.abs(cData[i+1] - bData[j+1]); // g
+        cData[i+2] = Math.abs(cData[i+2] - bData[j+2]); // b
+      }
+    }
+
+    // Helpers
+    function offsets (imageData) {
+      rowOffset = Math.floor((height - imageData.height) / 2);
+      columnOffset = Math.floor((width - imageData.width) / 2);
+    }
+
+    return c;
+  }
+
+
+  // Validation
+  function checkType () {
+    var i;
+    for (i = 0; i < arguments.length; i++) {
+      if (!isImageType(arguments[i])) {
+        throw {
+          name : 'ImageTypeError',
+          message : 'Submitted object was not an image.'
+        };
+      }
+    }
+  }
+
+
+  // Jasmine Matchers
+  function get (element, content) {
+    element = document.createElement(element);
+    if (element && content) {
+      element.innerHTML = content;
+    }
+    return element;
+  }
+
+  jasmine = {
+
+    toBeImageData : function () {
+      return imagediff.isImageData(this.actual);
+    },
+
+    toImageDiffEqual : function (expected, tolerance) {
+
+      if (typeof (document) !== UNDEFINED) {
+        this.message = function () {
+          var
+            div     = get('div'),
+            a       = get('div', '<div>Actual:</div>'),
+            b       = get('div', '<div>Expected:</div>'),
+            c       = get('div', '<div>Diff:</div>'),
+            diff    = imagediff.diff(this.actual, expected),
+            canvas  = getCanvas(),
+            context;
+
+          canvas.height = diff.height;
+          canvas.width  = diff.width;
+
+          div.style.overflow = 'hidden';
+          a.style.float = 'left';
+          b.style.float = 'left';
+          c.style.float = 'left';
+
+          context = canvas.getContext('2d');
+          context.putImageData(diff, 0, 0);
+
+          a.appendChild(toCanvas(this.actual));
+          b.appendChild(toCanvas(expected));
+          c.appendChild(canvas);
+
+          div.appendChild(a);
+          div.appendChild(b);
+          div.appendChild(c);
+
+          return [
+            div,
+            "Expected not to be equal."
+          ];
+        };
+      }
+
+      return imagediff.equal(this.actual, expected, tolerance);
+    }
+  };
+
+
+  // Image Output
+  function imageDataToPNG (imageData, outputFile, callback) {
+
+    var
+      canvas = toCanvas(imageData),
+      base64Data,
+      decodedImage;
+
+    callback = callback || Function;
+
+    base64Data = canvas.toDataURL().replace(/^data:image\/\w+;base64,/,"");
+    decodedImage = new Buffer(base64Data, 'base64');
+    require('fs').writeFile(outputFile, decodedImage, callback);
+  }
+
+
+  // Definition
+  imagediff = {
+
+    createCanvas : getCanvas,
+    createImageData : getImageData,
+
+    isImage : isImage,
+    isCanvas : isCanvas,
+    isContext : isContext,
+    isImageData : isImageData,
+    isImageType : isImageType,
+
+    toImageData : function (object) {
+      checkType(object);
+      if (isImageData(object)) { return copyImageData(object); }
+      return toImageData(object);
+    },
+
+    equal : function (a, b, tolerance) {
+      checkType(a, b);
+      a = toImageData(a);
+      b = toImageData(b);
+      return equal(a, b, tolerance);
+    },
+    diff : function (a, b) {
+      checkType(a, b);
+      a = toImageData(a);
+      b = toImageData(b);
+      return diff(a, b);
+    },
+
+    jasmine : jasmine,
+
+    // Compatibility
+    noConflict : function () {
+      root[name] = previous;
+      return imagediff;
+    }
+  };
+
+  if (typeof module !== 'undefined') {
+    imagediff.imageDataToPNG = imageDataToPNG;
+  }
+
+  return imagediff;
+});

common/static/js_test.yml

@@ -30,6 +30,7 @@ prepend_path: common/static
 lib_paths:
     - js/vendor/jquery.min.js
     - js/vendor/jasmine-jquery.js
+    - js/vendor/jasmine-imagediff.js
     - js/vendor/underscore-min.js
     - js/vendor/backbone-min.js
     - js/vendor/jquery.timeago.js

lms/static/js_test.yml

@@ -31,6 +31,7 @@ lib_paths:
     - xmodule_js/common_static/coffee/src/ajax_prefix.js
     - xmodule_js/common_static/coffee/src/logger.js
     - xmodule_js/common_static/js/vendor/jasmine-jquery.js
+    - xmodule_js/common_static/js/vendor/jasmine-imagediff.js
     - xmodule_js/common_static/js/vendor/require.js
     - js/RequireJS-namespace-undefine.js
     - xmodule_js/common_static/js/vendor/jquery.min.js