update client tests

Author: tsolakoua

specs/client_spec.py

@@ -1,12 +1,10 @@
-from mamba import description, it
-from expects import expect, be_none, equal
-
 from amadeus import Client, Location
 
-with description('Client') as self:
-    with it('should exist'):
-        expect(Client).not_to(be_none)
 
-    with it('should have helper locations'):
-        expect(Location).not_to(be_none)
-        expect(Location.ANY).to(equal('AIRPORT,CITY'))
+def test_client_exists():
+    assert Client is not None
+
+
+def test_client_has_helper_locations():
+    assert Location is not None
+    assert Location.ANY == 'AIRPORT,CITY'