Added the actual files for test_data....

id3/data/test.csv

@@ -0,0 +1,11 @@
+10,2,class_0,class_1
+0,1,0
+2,3,1
+4,5,2
+6,7,3
+8,9,4
+10,11,5
+12,13,6
+14,15,7
+16,17,8
+18,19,9

id3/tests/test_data.py

@@ -0,0 +1,14 @@
+from numpy.testing import assert_almost_equal, assert_raises
+import numpy as np
+from id3.data import load_data
+import uuid
+
+X = np.arange(20).reshape(10, 2)
+y = np.arange(10).reshape(10, 1)
+
+
+def test_load_data():
+    assert_raises(IOError, load_data.load_data, str(uuid.uuid4()))
+    X_, y_, _ = load_data.load_data("test.csv", nominal=False)
+    assert_almost_equal(X, X_)
+    assert_almost_equal(y, y_)