edits to loader test

tests/unit/test_data_loaders.py

@@ -31,13 +31,18 @@ def csv_file(tmpdir):
 
 def test_dask_csv_loader(csv_file):
     num_batches = 500
-    batch_size = 10
+    batch_size = 12
+    num_partitions = 4
+
+    loader = DaskCSVLoader(
+        csv_file, header=None, block_size=5 * int(UNIF1["n"] / num_partitions)
+    )
 
-    loader = DaskCSVLoader(csv_file, header=None)
     sample = []
     for batch in loader.get_random_batches(num_batches, batch_size):
         sample.append(list(batch.iloc[:, 1]))
     sample = np.concatenate(sample)
-    print(sample.mean())
+
+    assert loader.df.npartitions == num_partitions
     assert sample.mean().round() == UNIF1["a"] + UNIF1["b"] / 2
-    assert len(sample) == num_batches * batch_size
+    assert len(sample) <= num_batches * batch_size