public void testGetCarthesianProductNoRows() throws Exception {
DataSet dataSet =
MetaModelHelper.getCarthesianProduct(createDataSet4(), createDataSet2(), createDataSet3());
assertEquals(4, dataSet.getSelectItems().length);
assertFalse(dataSet.next());
dataSet =
MetaModelHelper.getCarthesianProduct(createDataSet1(), createDataSet4(), createDataSet3());
assertEquals(4, dataSet.getSelectItems().length);
assertFalse(dataSet.next());
dataSet =
MetaModelHelper.getCarthesianProduct(createDataSet1(), createDataSet2(), createDataSet4());
assertEquals(3, dataSet.getSelectItems().length);
assertFalse(dataSet.next());
}
public void testTripleCarthesianProduct() throws Exception {
DataSet dataSet =
MetaModelHelper.getCarthesianProduct(createDataSet1(), createDataSet2(), createDataSet3());
assertEquals(4, dataSet.getSelectItems().length);
for (int i = 0; i < 3 * 3 * 2; i++) {
assertTrue("Assertion failed at i=" + i, dataSet.next());
}
assertFalse(dataSet.next());
}
public void testTripleCarthesianProductWithWhereItems() throws Exception {
DataSet ds1 = createDataSet1();
DataSet ds2 = createDataSet2();
DataSet[] dataSets =
new DataSet[] {
ds1, ds2,
};
FilterItem w1 = new FilterItem(ds1.getSelectItems()[0], OperatorType.EQUALS_TO, "f");
DataSet dataSet = MetaModelHelper.getCarthesianProduct(dataSets, w1);
assertEquals(2, dataSet.getSelectItems().length);
for (int i = 0; i < 1 * 3; i++) {
assertTrue("Assertion failed at i=" + i, dataSet.next());
assertEquals("f", dataSet.getRow().getValue(0));
}
assertFalse(dataSet.next());
}
public void testSimpleCarthesianProduct() throws Exception {
DataSet dataSet = MetaModelHelper.getCarthesianProduct(createDataSet1(), createDataSet2());
assertEquals(2, dataSet.getSelectItems().length);
assertTrue(dataSet.next());
assertEquals("Row[values=[f, b]]", dataSet.getRow().toString());
assertTrue(dataSet.next());
assertEquals("Row[values=[f, a]]", dataSet.getRow().toString());
assertTrue(dataSet.next());
assertTrue(dataSet.next());
assertTrue(dataSet.next());
assertTrue(dataSet.next());
assertTrue(dataSet.next());
assertTrue(dataSet.next());
assertTrue(dataSet.next());
assertEquals("Row[values=[o, r]]", dataSet.getRow().toString());
assertFalse(dataSet.next());
}
