Break tests out into individual cases

tests/jsunit/metrics_test.js

@@ -40,7 +40,7 @@ function makeMockWs(scale, x, y, width, height) {
         y: y
       }
     },
-    scale: 1
+    scale: scale
   };
 }
 
@@ -49,17 +49,19 @@ var test_GetContentDimensionsExact_empty = function() {
   var ws = makeMockWs(1, 0, 0, 0, 0)
   var defaultZoom = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   assertDimensionsMatch(defaultZoom, 0, 0, 0, 0);
+}
 
-  // zoom in.
-  ws.scale = 2;
+var test_GetContentDimensionsExact_emptyZoomIn = function() {
+  var ws = makeMockWs(2, 0, 0, 0, 0)
   var zoomIn = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   assertDimensionsMatch(zoomIn, 0, 0, 0, 0);
+}
 
-  // zoom out.
-  ws.scale = .5;
+var test_GetContentDimensionsExact_emptyZoomOut = function() {
+  var ws = makeMockWs(.5, 0, 0, 0, 0)
   var zoomOut = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   assertDimensionsMatch(zoomOut, 0, 0, 0, 0);
-};
+}
 
 // Non-empty workspace, with top-left corner at ws origin.
 var test_GetContentDimensionsExact_nonEmptyAtOrigin = function() {
@@ -67,19 +69,21 @@ var test_GetContentDimensionsExact_nonEmptyAtOrigin = function() {
   var defaultZoom = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // Pixel and ws units are the same at default zoom.
   assertDimensionsMatch(defaultZoom, 0, 0, 100, 100);
+}
 
-  // zoom in.
-  ws.scale = 2;
+var test_GetContentDimensionsExact_nonEmptyAtOriginZoomIn = function() {
+  var ws = makeMockWs(2, 0, 0, 100, 100)
   var zoomIn = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // 1 ws unit = 2 pixels at this zoom level.
   assertDimensionsMatch(zoomIn, 0, 0, 200, 200);
+}
 
-  // zoom out.
-  ws.scale = .5;
+var test_GetContentDimensionsExact_nonEmptyAtOriginZoomOut = function() {
+  var ws = makeMockWs(.5, 0, 0, 100, 100)
   var zoomOut = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // 1 ws unit = 0.5 pixels at this zoom level.
   assertDimensionsMatch(zoomOut, 0, 0, 50, 50);
-};
+}
 
 // Non-empty workspace, with top-left corner in positive ws coordinates.
 var test_GetContentDimensionsExact_nonEmptyPositiveOrigin = function() {
@@ -87,21 +91,22 @@ var test_GetContentDimensionsExact_nonEmptyPositiveOrigin = function() {
   var defaultZoom = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // Pixel and ws units are the same at default zoom.
   assertDimensionsMatch(defaultZoom, 10, 10, 100, 100);
+}
 
-  // Changing zoom will change both width/height and origin location in pixels.
-
-  // zoom in.
-  ws.scale = 2;
+// Changing zoom will change both width/height and origin location in pixels.
+var test_GetContentDimensionsExact_nonEmptyPositiveOriginZoomIn = function() {
+  var ws = makeMockWs(2, 10, 10, 100, 100)
   var zoomIn = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // 1 ws unit = 2 pixels at this zoom level.
   assertDimensionsMatch(zoomIn, 20, 20, 200, 200);
+}
 
-  // zoom out.
-  ws.scale = .5;
+var test_GetContentDimensionsExact_nonEmptyPositiveOriginZoomOut = function() {
+  var ws = makeMockWs(.5, 10, 10, 100, 100)
   var zoomOut = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // 1 ws unit = 0.5 pixels at this zoom level.
   assertDimensionsMatch(zoomOut, 5, 5, 50, 50);
-};
+}
 
 // Non-empty workspace, with top-left corner in negative ws coordinates.
 var test_GetContentDimensionsExact_nonEmptyNegativeOrigin = function() {
@@ -109,19 +114,19 @@ var test_GetContentDimensionsExact_nonEmptyNegativeOrigin = function() {
   var defaultZoom = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // Pixel and ws units are the same at default zoom.
   assertDimensionsMatch(defaultZoom, -10, -10, 100, 100);
+}
 
-  // Changing zoom will change both width/height and origin location in pixels.
-
-  // zoom in.
-  ws.scale = 2;
+// Changing zoom will change both width/height and origin location in pixels.
+var test_GetContentDimensionsExact_nonEmptyNegativeOriginZoomIn = function() {
+  var ws = makeMockWs(2, -10, -10, 100, 100)
   var zoomIn = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // 1 ws unit = 2 pixels at this zoom level.
   assertDimensionsMatch(zoomIn, -20, -20, 200, 200);
+}
 
-  // zoom out.
-  ws.scale = .5;
+var test_GetContentDimensionsExact_nonEmptyNegativeOriginZoomOut = function() {
+  var ws = makeMockWs(.5, -10, -10, 100, 100)
   var zoomOut = Blockly.WorkspaceSvg.getContentDimensionsExact_(ws);
   // 1 ws unit = 0.5 pixels at this zoom level.
   assertDimensionsMatch(zoomOut, -5, -5, 50, 50);
-};
-
+}