test(terminal): cover live macOS Korean syllable flush (#12284)

tests/e2e/terminal-macos-2set-korean-native.spec.ts

@@ -32,13 +32,47 @@ function typeNativeTwoSetKorean(processId: number, keyCodes: readonly number[]):
   ])
 }
 
+function typeNativeTwoSetKoreanPreedit(processId: number, keyCodes: readonly number[]): void {
+  execFileSync('osascript', [
+    '-e',
+    `tell application "System Events" to set frontmost of first application process whose unix id is ${processId} to true`,
+    '-e',
+    'tell application "System Events"',
+    '-e',
+    `repeat with currentKeyCode in {${keyCodes.join(', ')}}`,
+    '-e',
+    'key code (currentKeyCode as integer)',
+    '-e',
+    'delay 0.1',
+    '-e',
+    'end repeat',
+    '-e',
+    'end tell'
+  ])
+}
+
+function commitNativeComposition(): void {
+  execFileSync('osascript', ['-e', 'tell application "System Events" to key code 36'])
+}
+
+async function readActiveComposition(page: Page): Promise<string | null> {
+  return page.evaluate(() => {
+    const textarea = document.querySelector<HTMLTextAreaElement>('.xterm-helper-textarea:focus')
+    const composition = textarea?.parentElement?.querySelector<HTMLElement>(
+      '.composition-view.active'
+    )
+    return composition?.textContent?.replaceAll('\u200e', '') ?? null
+  })
+}
+
 async function runNativeScenario(
   page: Page,
   testInfo: TestInfo,
   testRepoPath: string,
   processId: number,
   keyCodes: readonly number[],
-  expectedText: string
+  expectedText: string,
+  preCommit?: { committedText: string; preeditText: string }
 ): Promise<void> {
   await waitForSessionReady(page)
   await waitForActiveWorktree(page)
@@ -55,7 +89,16 @@ async function runNativeScenario(
     await startTerminalImeByteReader(page, ptyId, reader)
     await focusActiveTerminalInput(page)
     await installTerminalImeBoundaryProbe(page)
-    typeNativeTwoSetKorean(processId, keyCodes)
+    if (preCommit) {
+      typeNativeTwoSetKoreanPreedit(processId, keyCodes)
+      await expect.poll(() => readActiveComposition(page)).toBe(preCommit.preeditText)
+      await expect
+        .poll(async () => (await readTerminalImeBoundaryTrace(page)).onData.join(''))
+        .toBe(preCommit.committedText)
+      commitNativeComposition()
+    } else {
+      typeNativeTwoSetKorean(processId, keyCodes)
+    }
 
     const receivedBytes = await waitForTerminalImeBytes(page, reader)
     expect(receivedBytes).toEqual([Buffer.from(`${expectedText}\n`).toString('hex')])
@@ -109,4 +152,20 @@ test.describe('Native macOS 2-Set Korean terminal input @headful', () => {
       'ㅐㅏ묘'
     )
   })
+
+  test('flushes each syllable while the next remains in preedit', async ({
+    electronApp,
+    orcaPage,
+    testRepoPath
+  }, testInfo) => {
+    await runNativeScenario(
+      orcaPage,
+      testInfo,
+      testRepoPath,
+      electronApp.process().pid!,
+      [15, 40, 1, 40, 14, 40],
+      '가나다',
+      { committedText: '가나', preeditText: '다' }
+    )
+  })
 })