feat: add support for <C-u> to clear line in prompt

jestjs · Apr 28, 2021 · ad78494 · ad78494
1 parent c5e2a59
commit ad78494
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diff --git a/packages/jest-watcher/src/constants.ts b/packages/jest-watcher/src/constants.ts
@@ -15,6 +15,7 @@ export const KEYS = {
   BACKSPACE: Buffer.from(isWindows ? '08' : '7f', 'hex').toString(),
   CONTROL_C: '\u0003',
   CONTROL_D: '\u0004',
+  CONTROL_U: '\u0015',
   ENTER: '\r',
   ESCAPE: '\u001b',
 };
diff --git a/packages/jest-watcher/src/lib/Prompt.ts b/packages/jest-watcher/src/lib/Prompt.ts
@@ -89,6 +89,12 @@ export default class Prompt {
       case KEYS.ARROW_LEFT:
       case KEYS.ARROW_RIGHT:
         break;
+      case KEYS.CONTROL_U:
+        this._value = '';
+        this._offset = -1;
+        this._selection = null;
+        this._onChange();
+        break;
       default:
         this._value =
           key === KEYS.BACKSPACE ? this._value.slice(0, -1) : this._value + key;

diff --git a/packages/jest-watcher/src/lib/__tests__/prompt.test.ts b/packages/jest-watcher/src/lib/__tests__/prompt.test.ts
@@ -62,3 +62,20 @@ it('calls handler on cancel prompt', () => {
 
   expect(onCancel).toHaveBeenCalled();
 });
+
+it('clears the line when CONTROL_U is pressed', () => {
+  const prompt = new Prompt();
+  const onChange = jest.fn();
+  const options = {max: 10, offset: -1};
+
+  prompt.enter(onChange, jest.fn(), jest.fn());
+
+  prompt.put('t');
+  prompt.put('e');
+  prompt.put('s');
+  prompt.put('t');
+  expect(onChange).toHaveBeenLastCalledWith('test', options);
+
+  prompt.put(KEYS.CONTROL_U);
+  expect(onChange).toHaveBeenLastCalledWith('', options);
+});