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test(android-e2e): read the logcat tail for rotation evidence #2359

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Merged
thymikee merged 1 commit into from
Sep 7, 2026
+5 −1
Merged

test(android-e2e): read the logcat tail for rotation evidence #2359

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6 changes: 5 additions & 1 deletion test/integration/android-emulator-e2e/live-harness.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,8 @@ export function createContext(): LiveContext {
const execFileAsync = promisify(execFile);

const ROTATION_PROBE_TIMEOUT_MS = 5_000;
/** Lines read back from logcat; the rotation decisions of the last few minutes fit comfortably. */
const ROTATION_LOG_TAIL = 4_000;
const ROTATION_LOG_LINES = 60;
const ROTATION_LOG_LINE_LENGTH = 240;

Expand All @@ -56,7 +58,9 @@ async function readAndroidRotationEvidence(context: LiveContext): Promise<string
['accelerometer_rotation', ['shell', 'settings', 'get', 'system', 'accelerometer_rotation']],
['user_rotation', ['shell', 'settings', 'get', 'system', 'user_rotation']],
['display rotation', ['shell', 'dumpsys', 'display']],
['logcat rotation decisions', ['logcat', '-d', '-v', 'time']],
// The tail, not the whole buffer: the emulator keeps 2MB and a loaded one takes seconds to
// dump it, which is what the group bound is for, not this read.
['logcat rotation decisions', ['logcat', '-d', '-v', 'time', '-t', String(ROTATION_LOG_TAIL)]],
];
const sections: string[] = [];
for (const [title, args] of probes) {
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