add tests

src/containers/selection-hoc.jsx

@@ -65,7 +65,7 @@ const SelectionHOC = function (WrappedComponent) {
             if (selectedItems.length === 0) {
                 return;
             }
-            const colorState = getColorsFromSelection();
+            const colorState = getColorsFromSelection(selectedItems);
             dispatch(changeFillColor(colorState.fillColor));
             dispatch(changeStrokeColor(colorState.strokeColor));
             dispatch(changeStrokeWidth(colorState.strokeWidth));

src/helper/style-path.js

@@ -82,12 +82,12 @@ const applyStrokeWidthToSelection = function (value) {
 
 /**
  * Get state of colors and stroke width for selection
+ * @param {!Array<paper.Item>} selectedItems Selected paper items
  * @return {object} Object of strokeColor, strokeWidth, fillColor of the selection.
  *     Gives MIXED when there are mixed values for a color, and null for transparent.
  *     Gives null when there are mixed values for stroke width.
  */
-const getColorsFromSelection = function () {
+const getColorsFromSelection = function (selectedItems) {
-    const selectedItems = getSelectedItems(true /* recursive */);
     let selectionFillColorString;
     let selectionStrokeColorString;
     let selectionStrokeWidth;

src/reducers/fill-color.js

@@ -21,7 +21,7 @@ const reducer = function (state, action) {
         if (!action.selectedItems || !action.selectedItems.length) {
             return state;
         }
-        return getColorsFromSelection().fillColor;
+        return getColorsFromSelection(action.selectedItems).fillColor;
     default:
         return state;
     }

src/reducers/selected-items.js

@@ -1,3 +1,4 @@
+import log from '../log/log';
 const CHANGE_SELECTED_ITEMS = 'scratch-paint/select/CHANGE_SELECTED_ITEMS';
 const initialState = [];
 
@@ -5,11 +6,15 @@ const reducer = function (state, action) {
     if (typeof state === 'undefined') state = initialState;
     switch (action.type) {
     case CHANGE_SELECTED_ITEMS:
+        if (!action.selectedItems || !(action.selectedItems instanceof Array)) {
+            log.warn(`No selected items or wrong format provided: ${action.selectedItems}`);
+            return state;
+        }
         // If they are not equal, return the new list of items. Else return old list
         if (action.selectedItems.length !== state.length) {
             return action.selectedItems;
         }
-        // Shallow equality check
+        // Shallow equality check (we may need to update this later for more granularity)
         for (let i = 0; i < action.selectedItems.length; i++) {
             if (action.selectedItems[i] !== state[i]) {
                 return action.selectedItems;

src/reducers/stroke-color.js

@@ -21,7 +21,7 @@ const reducer = function (state, action) {
         if (!action.selectedItems || !action.selectedItems.length) {
             return state;
         }
-        return getColorsFromSelection().strokeColor;
+        return getColorsFromSelection(action.selectedItems).strokeColor;
     default:
         return state;
     }

src/reducers/stroke-width.js

@@ -20,7 +20,7 @@ const reducer = function (state, action) {
         if (!action.selectedItems || !action.selectedItems.length) {
             return state;
         }
-        return getColorsFromSelection().strokeWidth;
+        return getColorsFromSelection(action.selectedItems).strokeWidth;
     default:
         return state;
     }

test/__mocks__/paperMocks.js

@@ -0,0 +1,23 @@
+/**
+ * Pretend paper.Item whose parent is a layer.
+ * @param {object} options Item params
+ * @param {string} options.strokeColor Value to return for the item's stroke color
+ * @param {string} options.fillColor Value to return for the item's fill color
+ * @param {string} options.strokeWidth Value to return for the item's stroke width
+ * @return {object} mock item
+ */
+const mockPaperRootItem = function (options) {
+    return {
+        strokeColor: {toCSS: function () {
+            return options.strokeColor;
+        }},
+        fillColor: {toCSS: function () {
+            return options.fillColor;
+        }},
+        strokeWidth: options.strokeWidth,
+        parent: {className: 'Layer'},
+        data: {}
+    };
+};
+
+export {mockPaperRootItem};

test/unit/fill-color-reducer.test.js

@@ -1,6 +1,9 @@
 /* eslint-env jest */
 import fillColorReducer from '../../src/reducers/fill-color';
 import {changeFillColor} from '../../src/reducers/fill-color';
+import {setSelectedItems} from '../../src/reducers/selected-items';
+import {MIXED} from '../../src/helper/style-path';
+import {mockPaperRootItem} from '../__mocks__/paperMocks';
 
 test('initialState', () => {
     let defaultState;
@@ -26,6 +29,22 @@ test('changeFillColor', () => {
         .toEqual(newFillColor);
 });
 
+test('changefillColorViaSelectedItems', () => {
+    let defaultState;
+
+    const fillColor1 = 6;
+    const fillColor2 = null; // transparent
+    let selectedItems = [mockPaperRootItem({fillColor: fillColor1})];
+    expect(fillColorReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(fillColor1);
+    selectedItems = [mockPaperRootItem({fillColor: fillColor2})];
+    expect(fillColorReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(fillColor2);
+    selectedItems = [mockPaperRootItem({fillColor: fillColor1}), mockPaperRootItem({fillColor: fillColor2})];
+    expect(fillColorReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(MIXED);
+});
+
 test('invalidChangeFillColor', () => {
     const origState = '#fff';
 

test/unit/selected-items-reducer.test.js

@@ -0,0 +1,47 @@
+/* eslint-env jest */
+import selectedItemsReducer from '../../src/reducers/selected-items';
+import {setSelectedItems, clearSelectedItems} from '../../src/reducers/selected-items';
+
+test('initialState', () => {
+    let defaultState;
+
+    expect(selectedItemsReducer(defaultState /* state */, {type: 'anything'} /* action */)).toBeDefined();
+});
+
+test('setSelectedItems', () => {
+    let defaultState;
+
+    const newSelected1 = ['selected1', 'selected2'];
+    const newSelected2 = ['selected1', 'selected3'];
+    const unselected = [];
+    expect(selectedItemsReducer(defaultState /* state */, setSelectedItems(newSelected1) /* action */))
+        .toEqual(newSelected1);
+    expect(selectedItemsReducer(newSelected1, setSelectedItems(newSelected2) /* action */))
+        .toEqual(newSelected2);
+    expect(selectedItemsReducer(newSelected1, setSelectedItems(unselected) /* action */))
+        .toEqual(unselected);
+    expect(selectedItemsReducer(defaultState, setSelectedItems(unselected) /* action */))
+        .toEqual(unselected);
+});
+
+test('clearSelectedItems', () => {
+    let defaultState;
+
+    const selectedState = ['selected1', 'selected2'];
+    const unselectedState = [];
+    expect(selectedItemsReducer(defaultState /* state */, clearSelectedItems() /* action */))
+        .toHaveLength(0);
+    expect(selectedItemsReducer(selectedState /* state */, clearSelectedItems() /* action */))
+        .toHaveLength(0);
+    expect(selectedItemsReducer(unselectedState /* state */, clearSelectedItems() /* action */))
+        .toHaveLength(0);
+});
+
+test('invalidsetSelectedItems', () => {
+    const origState = ['selected1', 'selected2'];
+
+    expect(selectedItemsReducer(origState /* state */, setSelectedItems() /* action */))
+        .toBe(origState);
+    expect(selectedItemsReducer(origState /* state */, setSelectedItems('notAnArray') /* action */))
+        .toBe(origState);
+});

test/unit/stroke-color-reducer.test.js

@@ -1,6 +1,9 @@
 /* eslint-env jest */
 import strokeColorReducer from '../../src/reducers/stroke-color';
 import {changeStrokeColor} from '../../src/reducers/stroke-color';
+import {setSelectedItems} from '../../src/reducers/selected-items';
+import {MIXED} from '../../src/helper/style-path';
+import {mockPaperRootItem} from '../__mocks__/paperMocks';
 
 test('initialState', () => {
     let defaultState;
@@ -26,6 +29,22 @@ test('changeStrokeColor', () => {
         .toEqual(newStrokeColor);
 });
 
+test('changeStrokeColorViaSelectedItems', () => {
+    let defaultState;
+
+    const strokeColor1 = 6;
+    const strokeColor2 = null; // transparent
+    let selectedItems = [mockPaperRootItem({strokeColor: strokeColor1})];
+    expect(strokeColorReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(strokeColor1);
+    selectedItems = [mockPaperRootItem({strokeColor: strokeColor2})];
+    expect(strokeColorReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(strokeColor2);
+    selectedItems = [mockPaperRootItem({strokeColor: strokeColor1}), mockPaperRootItem({strokeColor: strokeColor2})];
+    expect(strokeColorReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(MIXED);
+});
+
 test('invalidChangeStrokeColor', () => {
     const origState = '#fff';
 

test/unit/stroke-width-reducer.test.js

@@ -1,6 +1,8 @@
 /* eslint-env jest */
 import strokeWidthReducer from '../../src/reducers/stroke-width';
 import {MAX_STROKE_WIDTH, changeStrokeWidth} from '../../src/reducers/stroke-width';
+import {setSelectedItems} from '../../src/reducers/selected-items';
+import {mockPaperRootItem} from '../__mocks__/paperMocks';
 
 test('initialState', () => {
     let defaultState;
@@ -23,6 +25,22 @@ test('changestrokeWidth', () => {
         .toEqual(MAX_STROKE_WIDTH);
 });
 
+test('changeStrokeWidthViaSelectedItems', () => {
+    let defaultState;
+
+    const strokeWidth1 = 6;
+    let strokeWidth2; // no outline
+    let selectedItems = [mockPaperRootItem({strokeWidth: strokeWidth1})];
+    expect(strokeWidthReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(strokeWidth1);
+    selectedItems = [mockPaperRootItem({strokeWidth: strokeWidth2})];
+    expect(strokeWidthReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(0); // Convert no outline to stroke width 0
+    selectedItems = [mockPaperRootItem({strokeWidth: strokeWidth1}), mockPaperRootItem({strokeWidth: strokeWidth2})];
+    expect(strokeWidthReducer(defaultState /* state */, setSelectedItems(selectedItems) /* action */))
+        .toEqual(null); // null indicates mixed for stroke width
+});
+
 test('invalidChangestrokeWidth', () => {
     const origState = {strokeWidth: 1};