Improve basic stats coverage

Author: astaric

Orange/tests/test_basic_stats.py

@@ -0,0 +1,35 @@
+# Test methods with long descriptive names can omit docstrings
+# pylint: disable=missing-docstring
+from unittest import TestCase
+
+from Orange.data import Table
+from Orange.statistics.basic_stats import DomainBasicStats, BasicStats
+
+
+class TestDomainBasicStats(TestCase):
+    def setUp(self):
+        self.zoo = Table("zoo")
+
+    def test_domain_basic_stats(self):
+        domain = self.zoo.domain
+        attr_stats = [BasicStats(self.zoo, a) for a in domain.attributes]
+        class_var_stats = [BasicStats(self.zoo, a) for a in domain.class_vars]
+        meta_stats = [BasicStats(self.zoo, a) for a in domain.metas]
+
+        domain_stats = DomainBasicStats(self.zoo)
+        self.assertStatsEqual(domain_stats.stats,
+                              attr_stats + class_var_stats)
+
+        domain_stats = DomainBasicStats(self.zoo, include_metas=True)
+        self.assertStatsEqual(domain_stats.stats,
+                              attr_stats + class_var_stats + meta_stats)
+
+    def assertStatsEqual(self, stats1, stats2):
+        self.assertEqual(len(stats1), len(stats2))
+        for stat1, stat2 in zip(stats1, stats2):
+            self.assertAlmostEqual(stat1.min, stat2.min)
+            self.assertAlmostEqual(stat1.max, stat2.max)
+            self.assertAlmostEqual(stat1.mean, stat2.mean)
+            self.assertAlmostEqual(stat1.var, stat2.var)
+            self.assertAlmostEqual(stat1.nans, stat2.nans)
+            self.assertAlmostEqual(stat1.non_nans, stat2.non_nans)