feat(text-editor): add tests for the table plugin

- Create tests using the new testing utilities

This completes the implementation of core editor plugins and demonstrates
the effectiveness of the new testing utilities.

Author: john-traas

src/components/text-editor/prosemirror-adapter/plugins/table-plugin.spec.ts

@@ -0,0 +1,170 @@
+import { Schema, NodeType } from 'prosemirror-model';
+import { Plugin } from 'prosemirror-state';
+import { createCustomTestSchema } from '../../test-setup/schema-builder';
+import { createEditorState } from '../../test-setup/editor-state-builder';
+import {
+    createEditorView,
+    createDispatchSpy,
+    cleanupEditorView,
+} from '../../test-setup/editor-view-builder';
+import {
+    getTableEditingPlugins,
+    getTableNodes,
+    createStyleAttribute,
+} from './table-plugin';
+
+describe('Table Plugin', () => {
+    let view;
+    let container;
+
+    afterEach(() => {
+        if (view) {
+            cleanupEditorView(view, container);
+            view = null;
+            container = null;
+        }
+    });
+
+    describe('getTableEditingPlugins', () => {
+        it('should return an array with table editing plugin when tables are enabled', () => {
+            const plugins = getTableEditingPlugins(true);
+
+            expect(plugins).toBeInstanceOf(Array);
+            expect(plugins.length).toBe(1);
+            expect(plugins[0]).toBeInstanceOf(Plugin);
+        });
+
+        it('should return an empty array when tables are disabled', () => {
+            const plugins = getTableEditingPlugins(false);
+
+            expect(plugins).toBeInstanceOf(Array);
+            expect(plugins.length).toBe(0);
+        });
+
+        it('should create a working plugin that can be added to an editor state', () => {
+            const baseSchema = createCustomTestSchema({});
+            const tableNodes = getTableNodes();
+            let nodes = baseSchema.spec.nodes;
+
+            Object.entries(tableNodes).forEach(([name, spec]) => {
+                nodes = nodes.addToEnd(name, spec);
+            });
+
+            const schema = new Schema({
+                nodes: nodes,
+                marks: baseSchema.spec.marks,
+            });
+
+            const content = '<p>Text with table support</p>';
+            const plugins = getTableEditingPlugins(true);
+            const state = createEditorState(content, schema, plugins);
+
+            const dispatchSpy = createDispatchSpy();
+            const result = createEditorView(state, dispatchSpy);
+            view = result.view;
+            container = result.container;
+
+            expect(plugins.length).toBe(1);
+            expect(view.state.plugins).toContain(plugins[0]);
+        });
+    });
+
+    describe('getTableNodes', () => {
+        it('should return an object with table node specs', () => {
+            const tableNodes = getTableNodes();
+
+            expect(tableNodes).toBeDefined();
+            expect(typeof tableNodes).toBe('object');
+
+            expect(tableNodes.table).toBeDefined();
+            expect(tableNodes.table_row).toBeDefined();
+            expect(tableNodes.table_cell).toBeDefined();
+            expect(tableNodes.table_header).toBeDefined();
+        });
+
+        it('should create node specs that can be added to a schema', () => {
+            const baseSchema = createCustomTestSchema({});
+            const tableNodes = getTableNodes();
+            let nodes = baseSchema.spec.nodes;
+
+            Object.entries(tableNodes).forEach(([name, spec]) => {
+                nodes = nodes.addToEnd(name, spec);
+            });
+
+            const schema = new Schema({
+                nodes: nodes,
+                marks: baseSchema.spec.marks,
+            });
+
+            expect(schema.nodes.table instanceof NodeType).toBe(true);
+            expect(schema.nodes.table_row instanceof NodeType).toBe(true);
+            expect(schema.nodes.table_cell instanceof NodeType).toBe(true);
+            expect(schema.nodes.table_header instanceof NodeType).toBe(true);
+        });
+
+        it('should include custom cell attributes for styling', () => {
+            const tableNodes = getTableNodes();
+
+            expect(tableNodes.table_cell).toBeDefined();
+            expect(tableNodes.table_cell.attrs).toBeDefined();
+            expect(tableNodes.table_cell.attrs.background).toBeDefined();
+            expect(tableNodes.table_cell.attrs.color).toBeDefined();
+
+            expect(tableNodes.table_cell.attrs.background.default).toBe(null);
+            expect(tableNodes.table_cell.attrs.color.default).toBe(null);
+        });
+    });
+
+    describe('Style attribute helper', () => {
+        it('should get style values from DOM elements', () => {
+            const backgroundAttr = createStyleAttribute('backgroundColor');
+
+            const element = document.createElement('td');
+            element.style.backgroundColor = 'red';
+
+            expect(backgroundAttr.getFromDOM(element)).toBe('red');
+        });
+
+        it('should set style values on attributes object', () => {
+            const backgroundAttr = createStyleAttribute('backgroundColor');
+            const attrs: Record<string, any> = {};
+
+            backgroundAttr.setDOMAttr('blue', attrs);
+
+            expect(attrs.style).toBe('backgroundColor: blue;');
+        });
+
+        it('should append to existing style attribute when setting multiple styles', () => {
+            const backgroundAttr = createStyleAttribute('backgroundColor');
+            const colorAttr = createStyleAttribute('color');
+            const attrs: Record<string, any> = {};
+
+            backgroundAttr.setDOMAttr('blue', attrs);
+            colorAttr.setDOMAttr('white', attrs);
+
+            expect(attrs.style).toBe('backgroundColor: blue;color: white;');
+        });
+
+        it('should not modify the style attribute when value is falsy', () => {
+            const backgroundAttr = createStyleAttribute('backgroundColor');
+            const attrs: Record<string, any> = {};
+
+            // Test with empty string
+            backgroundAttr.setDOMAttr('', attrs);
+            expect(attrs.style).toBeUndefined();
+
+            // Test with null
+            backgroundAttr.setDOMAttr(null, attrs);
+            expect(attrs.style).toBeUndefined();
+
+            // Test with undefined
+            backgroundAttr.setDOMAttr(undefined, attrs);
+            expect(attrs.style).toBeUndefined();
+
+            // Test that existing style is preserved when falsy value is passed
+            attrs.style = 'color: red;';
+            backgroundAttr.setDOMAttr('', attrs);
+            expect(attrs.style).toBe('color: red;');
+        });
+    });
+});

src/components/text-editor/prosemirror-adapter/plugins/table-plugin.ts

@@ -9,7 +9,7 @@ export const getTableEditingPlugins = (tablesEnabled: boolean): Plugin[] => {
     return [];
 };
 
-const createStyleAttribute = (cssProperty: string) => ({
+export const createStyleAttribute = (cssProperty: string) => ({
     default: null,
     getFromDOM: (dom: HTMLElement) => dom.style[cssProperty] || null,
     setDOMAttr: (value: string, attrs: Record<string, any>) => {