waitForOnResume for JUnit

waitForOnResume.java

/** These codes are licensed under CC0. */
/** Fragmentが画面上に表示されてonResumeが呼ばれるまで待つ */
    private void waitForOnResume(final Fragment fragment, int timeout) throws Throwable {
        waitForTrue(this, new TestUtils.BooleanFunc() {
            @Override
            public boolean run() {
                Rect r = new Rect();
                View view = fragment.getView();
                if (view != null) {
                    view.getGlobalVisibleRect(r);
                }
                return r.width() >0 && r.height() > 0 && fragment.isResumed();
            }
        }, timeout);
    }

    /** UIスレッド上でtrueになるまで待つ */
    public static void waitForTrue(InstrumentationTestCase testCase, final BooleanFunc func, int timeout) throws Throwable {
        long l = SystemClock.elapsedRealtime();
        do {
            final AtomicBoolean flag = new AtomicBoolean();
            testCase.runTestOnUiThread(new Runnable() {
                @Override
                public void run() {
                    flag.set(func.run());
                }
            });
            if (flag.get()) {
                break;
            }
            SystemClock.sleep(20);
        } while (SystemClock.elapsedRealtime() - l < timeout);
    }

    public interface BooleanFunc {
        public boolean run();
    }