ListOfItemsTallerThanScreenTestpublic class ListOfItemsTallerThanScreenTest extends android.test.ActivityInstrumentationTestCase2
| Fields Summary |
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| private android.widget.ListView | mListView | | private android.widget.listview.ListOfItemsTallerThanScreen | mActivity |
| Constructors Summary |
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public ListOfItemsTallerThanScreenTest()
super(ListOfItemsTallerThanScreen.class);
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| Methods Summary |
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| private int | getNumDownPressesToScrollDownAcrossSelected()Assuming the selected view is overlapping the bottom edge, how many times
do I have to press down to get beyond it so that either:
a) the next view is peeking in
b) the selected view is the last item in the list, and we are scrolled to the bottom
View selected = mListView.getSelectedView();
int realBottom = mListView.getBottom() - mListView.getListPaddingBottom();
assertTrue("view should be overlapping bottom",
selected.getBottom() > realBottom);
assertTrue("view should be overlapping bottom",
selected.getTop() < realBottom);
int pixelsOffScreen = selected.getBottom() - realBottom;
return (pixelsOffScreen / mListView.getMaxScrollAmount()) + 1;
| | protected void | setUp()
super.setUp();
mActivity = getActivity();
mListView = getActivity().getListView();
| | public void | testPreconditions()
assertNotNull(mListView);
assertEquals("should only be one visible child", 1, mListView.getChildCount());
final int amountOffScreen = mListView.getChildAt(0).getBottom() - (mListView.getBottom() - mListView.getListPaddingBottom());
assertTrue("must be more than max scroll off screen for this test to work",
amountOffScreen > mListView.getMaxScrollAmount());
| | public void | testScrollDownAcrossItem()
final View view = mListView.getSelectedView();
assertTrue(view.isSelected());
assertEquals(mListView.getListPaddingTop(),
view.getTop());
assertTrue("view must be taller than screen for this test to be worth anything",
view.getBottom() > mListView.getBottom());
// scroll down until next view is peeking ahead
int numScrollsUntilNextViewVisible = getNumDownPressesToScrollDownAcrossSelected();
for (int i = 0; i < numScrollsUntilNextViewVisible; i++) {
assertEquals("after " + i + " down scrolls across tall item",
mListView.getListPaddingTop() - mListView.getMaxScrollAmount() * i,
view.getTop());
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
}
// at this point, next view should be on screen peeking ahead, but we haven't given
// it selection yet
assertEquals("child count", 2, mListView.getChildCount());
assertEquals("selected position", 0, mListView.getSelectedItemPosition());
assertTrue("same view should be selected", view.isSelected());
final View peekingView = mListView.getChildAt(1);
assertEquals(view.getBottom(), peekingView.getTop());
| | public void | testScrollDownToLastItem()
final int numItems = mListView.getAdapter().getCount();
int maxDowns = 20;
while (mListView.getSelectedItemPosition() < (numItems - 1)) {
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
if (--maxDowns <= 0) {
fail("couldn't get to last item within 20 down arrows");
}
}
getInstrumentation().waitForIdleSync();
// press down enough times to get to bottom of last item
final int numDownsLeft = getNumDownPressesToScrollDownAcrossSelected();
assertTrue(numDownsLeft > 0);
for (int i = 0; i < numDownsLeft; i++) {
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
}
// one more time to get across last item
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
getInstrumentation().waitForIdleSync();
assertEquals(numItems - 1, mListView.getSelectedItemPosition());
final int realBottom = mListView.getHeight() - mListView.getListPaddingBottom();
assertEquals(realBottom, mListView.getSelectedView().getBottom());
assertEquals("views scrolled off screen should be removed from view group",
1, mListView.getChildCount());
| | public void | testScrollDownToNextItem()
final int numPresses = getNumDownPressesToScrollDownAcrossSelected();
assertEquals(1, mListView.getChildCount());
for (int i = 0; i < numPresses; i++) {
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
}
// remember top of peeking child
final int topOfPeekingNext = mListView.getChildAt(1).getTop();
// next view is peeking, now press one more time
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
// old view should not have selection
assertFalse(mListView.getChildAt(0).isSelected());
// next view should now have selection, and be scrolled another a third of the list
// height
assertEquals(2, mListView.getChildCount());
final View next = mListView.getChildAt(1);
assertTrue("has selection", next.isSelected());
assertEquals(topOfPeekingNext - (mListView.getMaxScrollAmount()), next.getTop());
| | public void | testScrollFirstItemOffScreen()
int numDownsToGetFirstItemOffScreen =
(mListView.getSelectedView().getHeight() / mListView.getMaxScrollAmount()) + 1;
for (int i = 0; i < numDownsToGetFirstItemOffScreen; i++) {
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
}
getInstrumentation().waitForIdleSync();
assertEquals("should be at next item",
1, mListView.getSelectedItemPosition());
final int listTop = mListView.getTop() + mListView.getListPaddingTop();
assertTrue("top of selected view should be above top of list",
mListView.getSelectedView().getTop() < listTop);
assertEquals("off screen item shouldn't be a child of list view",
1, mListView.getChildCount());
| | public void | testScrollUpAcrossFirstItem()
final int listTop = mListView.getListPaddingTop();
assertEquals(listTop, mListView.getSelectedView().getTop());
final int numPresses = getNumDownPressesToScrollDownAcrossSelected();
for (int i = 0; i < numPresses; i++) {
sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
}
assertEquals(2, mListView.getChildCount());
for (int i = 0; i < numPresses; i++) {
sendKeys(KeyEvent.KEYCODE_DPAD_UP);
assertEquals(1, mListView.getChildCount());
}
assertEquals(listTop, mListView.getSelectedView().getTop());
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