public void testNext() {
String[] columnNames = new String[] {"number"};
Cursor cursor1 = getCursor(TABLE_NAME_1, null, columnNames);
Cursor cursor2 = getCursor(TABLE_NAME_2, null, columnNames);
// For cursor1 , values are '01'~'07' and 'EQUAL_START'~'MAX_VALUE'
assertEquals(TEST_ITEM_COUNT, cursor1.getCount());
// For cursor2 , values are '11'~'17' and 'EQUAL_START'~'MAX_VALUE'
assertEquals(TEST_ITEM_COUNT, cursor2.getCount());
CursorJoiner cursorJoiner =
new CursorJoiner(cursor1, cursor1.getColumnNames(), cursor2, cursor2.getColumnNames());
for (int i = 0; i < UNIQUE_COUNT; i++) {
// For cursor1, value 1~7 result value as LEFT to cursor2 value '11'
assertTrue(cursorJoiner.hasNext());
assertEquals(Result.LEFT, cursorJoiner.next());
assertEquals(
getOrderNumberString(DEFAULT_TABLE1_VALUE_BEGINS + i, MAX_VALUE), cursor1.getString(0));
assertEquals(
getOrderNumberString(DEFAULT_TABLE2_VALUE_BEGINS, MAX_VALUE), cursor2.getString(0));
}
for (int i = 0; i < UNIQUE_COUNT; i++) {
// For cursor2, value 11~17 result a value as LEFT to cursor1 value '18'
assertTrue(cursorJoiner.hasNext());
assertEquals(Result.RIGHT, cursorJoiner.next());
assertEquals(getOrderNumberString(EQUAL_START, MAX_VALUE), cursor1.getString(0));
assertEquals(
getOrderNumberString(DEFAULT_TABLE2_VALUE_BEGINS + i, MAX_VALUE), cursor2.getString(0));
}
for (int i = 0; i < EQUAL_VALUE_COUNT; i++) {
// For cursor1 and cursor2, value 18~20 result a value as BOTH
assertTrue(cursorJoiner.hasNext());
assertEquals(Result.BOTH, cursorJoiner.next());
assertEquals(getOrderNumberString(EQUAL_START + i, MAX_VALUE), cursor1.getString(0));
assertEquals(getOrderNumberString(EQUAL_START + i, MAX_VALUE), cursor2.getString(0));
}
closeCursor(cursor1);
closeCursor(cursor2);
}
public void testCursorJoinerAndIterator() {
Cursor cursor1 = getCursor(TABLE_NAME_1, null, null);
Cursor cursor2 = getCursor(TABLE_NAME_2, null, null);
// Test with different length ColumenNAmes
try {
new CursorJoiner(cursor1, cursor1.getColumnNames(), cursor2, cursor2.getColumnNames());
fail("CursorJoiner's constructor should throws IllegalArgumentException here.");
} catch (IllegalArgumentException e) {
// expected
}
closeCursor(cursor1);
closeCursor(cursor2);
String[] columnNames = new String[] {"number"};
cursor1 = getCursor(TABLE_NAME_1, null, columnNames);
cursor2 = getCursor(TABLE_NAME_2, null, columnNames);
CursorJoiner cursorJoiner =
new CursorJoiner(cursor1, cursor1.getColumnNames(), cursor2, cursor2.getColumnNames());
// Test remove()
try {
cursorJoiner.remove();
fail("remove() should throws UnsupportedOperationException here");
} catch (UnsupportedOperationException e) {
// expected
}
assertEquals(TEST_ITEM_COUNT, cursor1.getCount());
assertEquals(TEST_ITEM_COUNT, cursor2.getCount());
// Test iterator
for (CursorJoiner.Result joinResult : cursorJoiner) {
switch (joinResult) {
case LEFT:
// Add the values into table test1 which table test1 possess and table test2 don't.
assertTrue(cursor1.getString(0).compareTo(cursor2.getString(0)) < 0);
addValueIntoTable(TABLE_NAME_2, cursor1.getString(0));
break;
case RIGHT:
// Add the values into table test2 which table test2 possess and table test1 don't.
assertTrue(cursor1.getString(0).compareTo(cursor2.getString(0)) > 0);
addValueIntoTable(TABLE_NAME_1, cursor2.getString(0));
break;
case BOTH:
// Delete the values table test1 and test2 both possess.
assertEquals(cursor1.getString(0), cursor2.getString(0));
deleteValueFromTable(TABLE_NAME_1, cursor1.getString(0));
deleteValueFromTable(TABLE_NAME_2, cursor2.getString(0));
break;
}
}
cursor1.requery();
cursor2.requery();
// Finally, two tables's number columns have the same contents
assertEquals(UNIQUE_COUNT * 2, cursor1.getCount());
assertEquals(UNIQUE_COUNT * 2, cursor2.getCount());
// For every table, merged with the other one's unique numbers, and deleted the originally
// mutual same numbers(EQUAL_START~MAX_VALUE);
cursor1.moveToFirst();
cursor2.moveToFirst();
for (int i = 0; i < UNIQUE_COUNT; i++) {
assertEquals(
getOrderNumberString(DEFAULT_TABLE1_VALUE_BEGINS + i, MAX_VALUE), cursor1.getString(0));
assertEquals(cursor1.getString(0), cursor2.getString(0));
cursor1.moveToNext();
cursor2.moveToNext();
}
closeCursor(cursor2);
closeCursor(cursor1);
}