separate %reset tests for finer granularity

IPython/core/tests/test_magic.py

@@ -193,9 +193,8 b' def test_numpy_reset_array_undec():'
     _ip.magic('reset -f array')
     yield (nt.assert_false, 'a' in _ip.user_ns)
 
-def test_reset_args():
-    "Test '%reset' magic with args which used to be extensions.clearcmd"
-    _ip = get_ipython()
+def test_reset_out():
+    "Test '%reset out' magic"
     _ip.run_cell("parrot = 'dead'", store_history=True)
     # test '%reset -f out', make an Out prompt
     _ip.run_cell("parrot", store_history=True)
@@ -204,6 +203,8 b' def test_reset_args():'
     nt.assert_false('dead' in [_ip.user_ns[x] for x in '_','__','___'])
     nt.assert_true(len(_ip.user_ns['Out']) == 0)
 
+def test_reset_in():
+    "Test '%reset in' magic"
     # test '%reset -f in'
     _ip.run_cell("parrot", store_history=True)
     nt.assert_true('parrot' in [_ip.user_ns[x] for x in '_i','_ii','_iii'])
@@ -211,16 +212,18 b' def test_reset_args():'
     nt.assert_false('parrot' in [_ip.user_ns[x] for x in '_i','_ii','_iii'])
     nt.assert_true(len(set(_ip.user_ns['In'])) == 1)
 
-    # test '%reset -f dhist'
+def test_reset_dhist():
+    "Test '%reset dhist' magic"
     _ip.run_cell("tmp = [d for d in _dh]") # copy before clearing
-    _ip.magic('cd')
+    _ip.magic('cd ' + os.path.dirname(nt.__file__))
     _ip.magic('cd -')
     nt.assert_true(len(_ip.user_ns['_dh']) > 0)
     _ip.magic('reset -f dhist')
     nt.assert_true(len(_ip.user_ns['_dh']) == 0)
     _ip.run_cell("_dh = [d for d in tmp]") #restore
 
-    # test that In length is preserved for %macro
+def test_reset_in_length():
+    "Test that '%reset in' preserves In[] length"
     _ip.run_cell("print 'foo'")
     _ip.run_cell("reset -f in")
     nt.assert_true(len(_ip.user_ns['In']) == _ip.displayhook.prompt_count+1)