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+# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import six
+
+import numpy as np
+from tensorflow.python.platform import test
+from tensorflow.contrib.learn.python.learn import datasets
+from tensorflow.contrib.learn.python.learn.datasets import synthetic
+
+class SyntheticTest(test.TestCase):
+ """Test synthetic dataset generation"""
+
+ def test_make_dataset(self):
+ """Test if the synthetic routine wrapper complains about the name"""
+ self.assertRaises(ValueError, datasets.make_dataset, name='_non_existing_name')
+
+ def test_all_datasets_callable(self):
+ """Test if all methods inside the `SYNTHETIC` are callable"""
+ self.assertIsInstance(datasets.SYNTHETIC, dict)
+ if len(datasets.SYNTHETIC) > 0:
+ for name, method in six.iteritems(datasets.SYNTHETIC):
+ self.assertTrue(callable(method))
+
+ def test_circles(self):
+ """Test if the circles are generated correctly
+
+ Tests:
+ - return type is `Dataset`
+ - returned `data` shape is (n_samples, n_features)
+ - returned `target` shape is (n_samples,)
+ - set of unique classes range is [0, n_classes)
+
+ TODO:
+ - all points have the same radius, if no `noise` specified
+ """
+ n_samples = 100
+ n_classes = 2
+ circ = synthetic.circles(n_samples = n_samples, noise = None, n_classes = n_classes)
+ self.assertIsInstance(circ, datasets.base.Dataset)
+ self.assertTupleEqual(circ.data.shape, (n_samples,2))
+ self.assertTupleEqual(circ.target.shape, (n_samples,))
+ self.assertSetEqual(set(circ.target), set(range(n_classes)))
+
+ def test_circles_replicable(self):
+ """Test if the data generation is replicable with a specified `seed`
+
+ Tests:
+ - return the same value if raised with the same seed
+ - return different values if noise or seed is different
+ """
+ seed = 42
+ noise = 0.1
+ circ0 = synthetic.circles(n_samples = 100, noise = noise, n_classes = 2, seed = seed)
+ circ1 = synthetic.circles(n_samples = 100, noise = noise, n_classes = 2, seed = seed)
+ np.testing.assert_array_equal(circ0.data, circ1.data)
+ np.testing.assert_array_equal(circ0.target, circ1.target)
+
+ circ1 = synthetic.circles(n_samples = 100, noise = noise, n_classes = 2, seed = seed+1)
+ self.assertRaises(AssertionError, np.testing.assert_array_equal, circ0.data, circ1.data)
+ self.assertRaises(AssertionError, np.testing.assert_array_equal, circ0.target, circ1.target)
+
+ circ1 = synthetic.circles(n_samples = 100, noise = noise/2., n_classes = 2, seed = seed)
+ self.assertRaises(AssertionError, np.testing.assert_array_equal, circ0.data, circ1.data)
+
+ def test_spirals(self):
+ """Test if the circles are generated correctly
+
+ Tests:
+ - if mode is unknown, ValueError is raised
+ - return type is `Dataset`
+ - returned `data` shape is (n_samples, n_features)
+ - returned `target` shape is (n_samples,)
+ - set of unique classes range is [0, n_classes)
+ """
+ self.assertRaises(ValueError, synthetic.spirals, mode='_unknown_mode_spiral_')
+ n_samples = 100
+ modes = ('archimedes', 'bernoulli', 'fermat')
+ for mode in modes:
+ spir = synthetic.spirals(n_samples = n_samples, noise = None, mode = mode)
+ self.assertIsInstance(spir, datasets.base.Dataset)
+ self.assertTupleEqual(spir.data.shape, (n_samples,2))
+ self.assertTupleEqual(spir.target.shape, (n_samples,))
+ self.assertSetEqual(set(spir.target), set(range(2)))
+
+ def test_spirals_replicable(self):
+ """Test if the data generation is replicable with a specified `seed`
+
+ Tests:
+ - return the same value if raised with the same seed
+ - return different values if noise or seed is different
+ """
+ seed = 42
+ noise = 0.1
+ modes = ('archimedes', 'bernoulli', 'fermat')
+ for mode in modes:
+ spir0 = synthetic.spirals(n_samples = 1000, noise = noise, seed = seed)
+ spir1 = synthetic.spirals(n_samples = 1000, noise = noise, seed = seed)
+ np.testing.assert_array_equal(spir0.data, spir1.data)
+ np.testing.assert_array_equal(spir0.target, spir1.target)
+
+ spir1 = synthetic.spirals(n_samples = 1000, noise = noise, seed = seed+1)
+ self.assertRaises(AssertionError, np.testing.assert_array_equal, spir0.data, spir1.data)
+ self.assertRaises(AssertionError, np.testing.assert_array_equal, spir0.target, spir1.target)
+
+ spir1 = synthetic.spirals(n_samples = 1000, noise = noise/2., seed = seed)
+ self.assertRaises(AssertionError, np.testing.assert_array_equal, spir0.data, spir1.data)
+
+
+if __name__ == "__main__":
+ test.main()