Added n-stacks challenge.

stacks_queues/n_stacks/test_n_stacks.py

@@ -0,0 +1,46 @@
+from nose.tools import assert_equal
+from nose.tools import raises
+
+
+class TestStacks(object):
+    
+    @raises(Exception)
+    def test_pop_on_empty(self, num_stacks, stack_size):
+        print('Test: Pop on empty stack')
+        stacks = Stacks(num_stacks, stack_size)
+        stacks.pop(0)
+
+    @raises(Exception)
+    def test_push_on_full(self, num_stacks, stack_size):
+        print('Test: Push to full stack')
+        stacks = Stacks(num_stacks, stack_size)
+        for i in xrange(0, stack_size):
+            stacks.push(2, i)
+        stacks.push(2, stack_size)
+
+    def test_stacks(self, num_stacks, stack_size):
+        print('Test: Push to non-full stack')
+        stacks = Stacks(num_stacks, stack_size)
+        stacks.push(0, 1)
+        stacks.push(0, 2)
+        stacks.push(1, 3)
+        stacks.push(2, 4)
+
+        print('Test: Pop on non-empty stack')
+        assert_equal(stacks.pop(0), 2)
+        assert_equal(stacks.pop(0), 1)
+        assert_equal(stacks.pop(1), 3)
+        assert_equal(stacks.pop(2), 4)
+
+        print('Success: test_stacks\n')
+
+def main():
+    num_stacks = 3
+    stack_size = 100    
+    test = TestStacks()
+    test.test_pop_on_empty(num_stacks, stack_size)
+    test.test_push_on_full(num_stacks, stack_size)
+    test.test_stacks(num_stacks, stack_size)
+    
+if __name__ == '__main__':
+    main()