Add extra tests for checking decorator logic with __wrapped__.

IPython/core/tests/test_oinspect.py

@@ -25,8 +25,10 b' from IPython.core.magic import (Magics, magics_class, line_magic,'
                                 cell_magic, line_cell_magic,
                                 register_line_magic, register_cell_magic,
                                 register_line_cell_magic)
+from IPython.external.decorator import decorator
 from IPython.utils import py3compat
 
+
 #-----------------------------------------------------------------------------
 # Globals and constants
 #-----------------------------------------------------------------------------
@@ -42,7 +44,7 b' ip = get_ipython()'
 # defined, if any code is inserted above, the following line will need to be
 # updated.  Do NOT insert any whitespace between the next line and the function
 # definition below.
-THIS_LINE_NUMBER = 45  # Put here the actual number of this line
+THIS_LINE_NUMBER = 47  # Put here the actual number of this line
 def test_find_source_lines():
     nt.assert_equal(oinspect.find_source_lines(test_find_source_lines), 
                     THIS_LINE_NUMBER+1)
@@ -53,6 +55,38 b' def test_find_file():'
                     os.path.abspath(__file__))
 
 
+def test_find_file_decorated1():
+
+    @decorator
+    def noop1(f):
+        def wrapper():
+            return f(*a, **kw)
+        return wrapper
+
+    @noop1
+    def f(x):
+        "My docstring"
+    
+    nt.assert_equal(oinspect.find_file(f),
+                    os.path.abspath(__file__))
+    nt.assert_equal(f.__doc__, "My docstring")
+
+
+def test_find_file_decorated2():
+
+    @decorator
+    def noop2(f, *a, **kw):
+        return f(*a, **kw)
+
+    @noop2
+    def f(x):
+        "My docstring 2"
+    
+    nt.assert_equal(oinspect.find_file(f),
+                    os.path.abspath(__file__))
+    nt.assert_equal(f.__doc__, "My docstring 2")
+    
+
 def test_find_file_magic():
     run = ip.find_line_magic('run')
     nt.assert_not_equal(oinspect.find_file(run), None)