add test cases for ipapi

test/test_ipapi.py

@@ -0,0 +1,30 b''
+import IPython.ipapi
+
+IPython.ipapi.make_session()
+ip = IPython.ipapi.get()
+
+def test_runlines():
+    ip.runlines(['a = 10', 'a+=1'])
+    ip.runlines('assert a == 11')
+    assert ip.user_ns['a'] == 11
+
+def test_db():
+    ip.db['__unittest_'] = 12
+    assert ip.db['__unittest_'] == 12
+    del ip.db['__unittest_']
+    assert '__unittest_' not in ip.db
+
+def test_defalias():
+    slot = [None]
+    # test callable alias
+    def cb(s):
+        slot[0] = s
+    
+    ip.defalias('testalias', cb)
+    ip.runlines('testalias foo bar')
+    assert slot[0] == 'testalias foo bar'
+        
+
+test_runlines()
+test_db()
+test_defalias