✨ Import text-editor code into the repository

frontend/text-editor/editor/content/dom/TextNodeIterator.test.js

@@ -0,0 +1,70 @@
+import { describe, test, expect } from "vitest";
+import TextNodeIterator from "./TextNodeIterator";
+import { createInline } from "./Inline";
+import { createParagraph } from "./Paragraph";
+import { createRoot } from "./Root";
+import { createLineBreak } from "./LineBreak";
+
+/* @vitest-environment jsdom */
+describe("TextNodeIterator", () => {
+  test("Create a new TextNodeIterator with an invalid root should throw", () => {
+    expect(() => new TextNodeIterator(null)).toThrowError("Invalid root node");
+    expect(() => new TextNodeIterator(Infinity)).toThrowError(
+      "Invalid root node"
+    );
+    expect(() => new TextNodeIterator(1)).toThrowError("Invalid root node");
+    expect(() => new TextNodeIterator("hola")).toThrowError(
+      "Invalid root node"
+    );
+  });
+
+  test("Create a new TextNodeIterator and iterate only over text nodes", () => {
+    const rootNode = createRoot([
+      createParagraph([
+        createInline(new Text("Hello, ")),
+        createInline(new Text("World!")),
+        createInline(new Text("Whatever")),
+      ]),
+      createParagraph([createInline(createLineBreak())]),
+      createParagraph([createInline(new Text("This is a ")), createInline(new Text("test"))]),
+      createParagraph([createInline(new Text("Hi!"))]),
+    ]);
+
+    const textNodeIterator = new TextNodeIterator(rootNode);
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Hello, ");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("World!");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Whatever");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeType).toBe(Node.ELEMENT_NODE);
+    expect(textNodeIterator.currentNode.nodeName).toBe("BR");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("This is a ");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("test");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Hi!");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("test");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("This is a ");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeType).toBe(Node.ELEMENT_NODE);
+    expect(textNodeIterator.currentNode.nodeName).toBe("BR");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Whatever");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("World!");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Hello, ");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("World!");
+    textNodeIterator.previousNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Hello, ");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("World!");
+    textNodeIterator.nextNode();
+    expect(textNodeIterator.currentNode.nodeValue).toBe("Whatever");
+  });
+});