SQLiteCursorTestpublic class SQLiteCursorTest extends android.test.AndroidTestCase
| Fields Summary |
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| private SQLiteDatabase | mDatabase | | private File | mDatabaseFile | | private static final String | TABLE_NAME |
| Methods Summary |
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| protected void | setUp()
super.setUp();
File dbDir = getContext().getDir(this.getClass().getName(), Context.MODE_PRIVATE);
mDatabaseFile = new File(dbDir, "sqlitecursor_test.db");
if (mDatabaseFile.exists()) {
mDatabaseFile.delete();
}
mDatabase = SQLiteDatabase.openOrCreateDatabase(mDatabaseFile.getPath(), null);
assertNotNull(mDatabase);
// create a test table
mDatabase.execSQL("CREATE TABLE " + TABLE_NAME + " (i int, j int);");
| | protected void | tearDown()
mDatabase.close();
mDatabaseFile.delete();
super.tearDown();
| | public void | testFillWindow()this test could take a while to execute. so, designate it as LargeTest
// create schema
final String testTable = "testV";
mDatabase.beginTransaction();
mDatabase.execSQL("CREATE TABLE " + testTable + " (col1 int, desc text not null);");
mDatabase.setTransactionSuccessful();
mDatabase.endTransaction();
// populate the table with data
// create a big string that will almost fit a page but not quite.
// since sqlite wants to make sure each row is in a page, this string will allocate
// a new database page for each row.
StringBuilder buff = new StringBuilder();
for (int i = 0; i < 500; i++) {
buff.append(i % 10 + "");
}
ContentValues values = new ContentValues();
values.put("desc", buff.toString());
// insert more than 1MB of data in the table. this should ensure that the entire tabledata
// will need more than one CursorWindow
int N = 5000;
Set<Integer> rows = new HashSet<Integer>();
mDatabase.beginTransaction();
for (int j = 0; j < N; j++) {
values.put("col1", j);
mDatabase.insert(testTable, null, values);
rows.add(j); // store in a hashtable so we can verify the results from cursor later on
}
mDatabase.setTransactionSuccessful();
mDatabase.endTransaction();
assertEquals(N, rows.size());
Cursor c1 = mDatabase.rawQuery("select * from " + testTable, null);
assertEquals(N, c1.getCount());
c1.close();
// scroll through ALL data in the table using a cursor. should cause multiple calls to
// native_fill_window (and re-fills of the CursorWindow object)
Cursor c = mDatabase.query(testTable, new String[]{"col1", "desc"},
null, null, null, null, null);
int i = 0;
while (c.moveToNext()) {
int val = c.getInt(0);
assertTrue(rows.contains(val));
assertTrue(rows.remove(val));
}
// did I see all the rows in the table?
assertTrue(rows.isEmpty());
// change data and make sure the cursor picks up new data & count
rows = new HashSet<Integer>();
mDatabase.beginTransaction();
int M = N + 1000;
for (int j = 0; j < M; j++) {
rows.add(j);
if (j < N) {
continue;
}
values.put("col1", j);
mDatabase.insert(testTable, null, values);
}
mDatabase.setTransactionSuccessful();
mDatabase.endTransaction();
assertEquals(M, rows.size());
c.requery();
i = 0;
while (c.moveToNext()) {
int val = c.getInt(0);
assertTrue(rows.contains(val));
assertTrue(rows.remove(val));
}
// did I see all data from the modified table
assertTrue(rows.isEmpty());
// move cursor back to 1st row and scroll to about halfway in the result set
// and then delete 75% of data - and then do requery
c.moveToFirst();
int K = N / 2;
for (int p = 0; p < K && c.moveToNext(); p++) {
// nothing to do - just scrolling to about half-point in the resultset
}
mDatabase.beginTransaction();
mDatabase.delete(testTable, "col1 < ?", new String[]{ (3 * M / 4) + ""});
mDatabase.setTransactionSuccessful();
mDatabase.endTransaction();
c.requery();
assertEquals(M / 4, c.getCount());
while (c.moveToNext()) {
// just move the cursor to next row - to make sure it can go through the entire
// resultset without any problems
}
c.close();
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