Test ghost text in simple unit test

Author: Tyriar

src/vs/platform/terminal/common/capabilities/commandDetection/promptInputModel.ts

@@ -217,16 +217,18 @@ export class PromptInputModel extends Disposable implements IPromptInputModel {
 		// Check to the end of the line for possible ghost text. For example pwsh's ghost text
 		// can look like this `Get-|Ch[ildItem]`
 		if (proceedWithGhostTextCheck) {
+			let potentialGhostIndexOffset = 0;
 			let x = buffer.cursorX;
 			while (x < line.length) {
 				const cell = line.getCell(x++);
 				if (!cell || cell.getCode() === 0) {
 					break;
 				}
 				if (this._isCellStyledLikeGhostText(cell)) {
-					ghostTextIndex = this._cursorIndex;
+					ghostTextIndex = this._cursorIndex + potentialGhostIndexOffset;
 					break;
 				}
+				potentialGhostIndexOffset += cell.getChars().length;
 			}
 		}
 

src/vs/platform/terminal/test/common/capabilities/commandDetection/promptInputModel.test.ts

@@ -48,7 +48,7 @@ suite('PromptInputModel', () => {
 
 		const actualValueWithCursor = promptInputModel.getCombinedString();
 		strictEqual(
-			actualValueWithCursor.replaceAll('\n', '\u23CE'),
+			actualValueWithCursor,
 			valueWithCursor.replaceAll('\n', '\u23CE')
 		);
 
@@ -110,6 +110,18 @@ suite('PromptInputModel', () => {
 		assertPromptInput('foo bar|');
 	});
 
+	test('ghost text', async () => {
+		await writePromise('$ ');
+		fireCommandStart();
+		assertPromptInput('|');
+
+		await writePromise('foo\x1b[2m bar\x1b[0m\x1b[4D');
+		assertPromptInput('foo|[ bar]');
+
+		await writePromise('\x1b[2D');
+		assertPromptInput('f|oo[ bar]');
+	});
+
 	test('wide input (Korean)', async () => {
 		await writePromise('$ ');
 		fireCommandStart();