Fixed unused %cpaste test and moved into proper test suite.

IPython/core/tests/test_magic.py

@@ -1,301 +1,357
 """Tests for various magic functions.
 
 Needs to be run by nose (to make ipython session available).
 """
 from __future__ import absolute_import
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import os
 import sys
 import tempfile
 import types
 from cStringIO import StringIO
 
 import nose.tools as nt
 
 from IPython.utils.path import get_long_path_name
 from IPython.testing import decorators as dec
 from IPython.testing import tools as tt
 
 #-----------------------------------------------------------------------------
 # Test functions begin
 #-----------------------------------------------------------------------------
 def test_rehashx():
     # clear up everything
     _ip = get_ipython()
     _ip.alias_manager.alias_table.clear()
     del _ip.db['syscmdlist']
     
     _ip.magic('rehashx')
     # Practically ALL ipython development systems will have more than 10 aliases
 
     yield (nt.assert_true, len(_ip.alias_manager.alias_table) > 10)
     for key, val in _ip.alias_manager.alias_table.items():
         # we must strip dots from alias names
         nt.assert_true('.' not in key)
 
     # rehashx must fill up syscmdlist
     scoms = _ip.db['syscmdlist']
     yield (nt.assert_true, len(scoms) > 10)
 
 
 def test_magic_parse_options():
     """Test that we don't mangle paths when parsing magic options."""
     ip = get_ipython()
     path = 'c:\\x'
     opts = ip.parse_options('-f %s' % path,'f:')[0]
     # argv splitting is os-dependent
     if os.name == 'posix':
         expected = 'c:x'
     else:
         expected = path
     nt.assert_equals(opts['f'], expected)
 
     
 def doctest_hist_f():
     """Test %hist -f with temporary filename.
 
     In [9]: import tempfile
 
     In [10]: tfile = tempfile.mktemp('.py','tmp-ipython-')
 
     In [11]: %hist -n -f $tfile 3
 
     In [13]: import os; os.unlink(tfile)
     """
 
 
 def doctest_hist_r():
     """Test %hist -r
 
     XXX - This test is not recording the output correctly.  For some reason, in
     testing mode the raw history isn't getting populated.  No idea why.
     Disabling the output checking for now, though at least we do run it.
 
     In [1]: 'hist' in _ip.lsmagic()
     Out[1]: True
 
     In [2]: x=1
 
     In [3]: %hist -r 2
     x=1 # random
     %hist -r 2
     """
 
 def doctest_hist_op():
     """Test %hist -op
 
     In [1]: class b:
        ...:         pass
        ...: 
 
     In [2]: class s(b):
        ...:         def __str__(self):
        ...:             return 's'
        ...: 
 
     In [3]: 
 
     In [4]: class r(b):
        ...:         def __repr__(self):
        ...:             return 'r'
        ...: 
 
     In [5]: class sr(s,r): pass
        ...: 
 
     In [6]: 
 
     In [7]: bb=b()
 
     In [8]: ss=s()
 
     In [9]: rr=r()
 
     In [10]: ssrr=sr()
 
     In [11]: bb
     Out[11]: <...b instance at ...>
 
     In [12]: ss
     Out[12]: <...s instance at ...>
 
     In [13]: 
 
     In [14]: %hist -op
     >>> class b:
     ...     pass
     ... 
     >>> class s(b):
     ...     def __str__(self):
     ...         return 's'
     ... 
     >>> 
     >>> class r(b):
     ...     def __repr__(self):
     ...         return 'r'
     ... 
     >>> class sr(s,r): pass
     >>> 
     >>> bb=b()
     >>> ss=s()
     >>> rr=r()
     >>> ssrr=sr()
     >>> bb
     <...b instance at ...>
     >>> ss
     <...s instance at ...>
     >>> 
     """
 
 def test_shist():
     # Simple tests of ShadowHist class - test generator.
     import os, shutil, tempfile
 
     from IPython.utils import pickleshare
     from IPython.core.history import ShadowHist
     
     tfile = tempfile.mktemp('','tmp-ipython-')
     
     db = pickleshare.PickleShareDB(tfile)
     s = ShadowHist(db)
     s.add('hello')
     s.add('world')
     s.add('hello')
     s.add('hello')
     s.add('karhu')
 
     yield nt.assert_equals,s.all(),[(1, 'hello'), (2, 'world'), (3, 'karhu')]
     
     yield nt.assert_equal,s.get(2),'world'
     
     shutil.rmtree(tfile)
 
     
 # XXX failing for now, until we get clearcmd out of quarantine.  But we should
 # fix this and revert the skip to happen only if numpy is not around.
 #@dec.skipif_not_numpy
 @dec.skipknownfailure
 def test_numpy_clear_array_undec():
     from IPython.extensions import clearcmd
 
     _ip.ex('import numpy as np')
     _ip.ex('a = np.empty(2)')
     yield (nt.assert_true, 'a' in _ip.user_ns)
     _ip.magic('clear array')
     yield (nt.assert_false, 'a' in _ip.user_ns)
     
 
 # Multiple tests for clipboard pasting
 @dec.parametric
 def test_paste():
     _ip = get_ipython()
     def paste(txt, flags='-q'):
         """Paste input text, by default in quiet mode"""
         hooks.clipboard_get = lambda : txt
         _ip.magic('paste '+flags)
 
     # Inject fake clipboard hook but save original so we can restore it later
     hooks = _ip.hooks
     user_ns = _ip.user_ns
     original_clip = hooks.clipboard_get
 
     try:
         # This try/except with an emtpy except clause is here only because
         # try/yield/finally is invalid syntax in Python 2.4.  This will be
         # removed when we drop 2.4-compatibility, and the emtpy except below
         # will be changed to a finally.
 
         # Run tests with fake clipboard function
         user_ns.pop('x', None)
         paste('x=1')
         yield nt.assert_equal(user_ns['x'], 1)
 
         user_ns.pop('x', None)
         paste('>>> x=2')
         yield nt.assert_equal(user_ns['x'], 2)
 
         paste("""
         >>> x = [1,2,3]
         >>> y = []
         >>> for i in x:
         ...     y.append(i**2)
         ...
         """)
         yield nt.assert_equal(user_ns['x'], [1,2,3])
         yield nt.assert_equal(user_ns['y'], [1,4,9])
 
         # Now, test that paste -r works
         user_ns.pop('x', None)
         yield nt.assert_false('x' in user_ns)
         _ip.magic('paste -r')
         yield nt.assert_equal(user_ns['x'], [1,2,3])
 
         # Also test paste echoing, by temporarily faking the writer
         w = StringIO()
         writer = _ip.write
         _ip.write = w.write
         code = """
         a = 100
         b = 200"""
         try:
             paste(code,'')
             out = w.getvalue()
         finally:
             _ip.write = writer
         yield nt.assert_equal(user_ns['a'], 100)
         yield nt.assert_equal(user_ns['b'], 200)
         yield nt.assert_equal(out, code+"\n## -- End pasted text --\n")
         
     finally:
         # This should be in a finally clause, instead of the bare except above.
         # Restore original hook
         hooks.clipboard_get = original_clip
 
 
 def test_time():
     _ip.magic('time None')
 
 
 def doctest_time():
     """
     In [10]: %time None
     CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
     Wall time: 0.00 s
     """
 
 
 def test_doctest_mode():
     "Toggle doctest_mode twice, it should be a no-op and run without error"
     _ip.magic('doctest_mode')
     _ip.magic('doctest_mode')
 
 
 def test_parse_options():
     """Tests for basic options parsing in magics."""
     # These are only the most minimal of tests, more should be added later.  At
     # the very least we check that basic text/unicode calls work OK.
     nt.assert_equal(_ip.parse_options('foo', '')[1], 'foo')
     nt.assert_equal(_ip.parse_options(u'foo', '')[1], u'foo')
 
     
 def test_dirops():
     """Test various directory handling operations."""
     curpath = lambda :os.path.splitdrive(os.getcwd())[1].replace('\\','/')
 
     startdir = os.getcwd()
     ipdir = _ip.ipython_dir
     try:
         _ip.magic('cd "%s"' % ipdir)
         nt.assert_equal(curpath(), ipdir)
         _ip.magic('cd -')
         nt.assert_equal(curpath(), startdir)
         _ip.magic('pushd "%s"' % ipdir)
         nt.assert_equal(curpath(), ipdir)
         _ip.magic('popd')
         nt.assert_equal(curpath(), startdir)
     finally:
         os.chdir(startdir)
+
+
+def check_cpaste(code, should_fail=False):
+    """Execute code via 'cpaste' and ensure it was executed, unless
+    should_fail is set.
+    """
+    _ip.user_ns['code_ran'] = False
+
+    src = StringIO()
+    src.write('\n')
+    src.write(code)
+    src.write('\n--\n')
+    src.seek(0)
+
+    stdin_save = sys.stdin
+    sys.stdin = src
+    
+    try:
+        _ip.magic('cpaste')
+    except:
+        if not should_fail:
+            raise AssertionError("Failure not expected : '%s'" %
+                                 code)
+    else:
+        assert _ip.user_ns['code_ran']
+        if should_fail:
+            raise AssertionError("Failure expected : '%s'" % code)
+    finally:
+        sys.stdin = stdin_save
+
+
+def test_cpaste():
+    """Test cpaste magic"""
+
+    def run():
+        """Marker function: sets a flag when executed.
+        """
+        _ip.user_ns['code_ran'] = True
+        return 'run' # return string so '+ run()' doesn't result in success
+
+    tests = {'pass': ["> > > run()",
+                      ">>> > run()",
+                      "+++ run()",
+                      "++ run()",
+                      "  >>> run()"],
+
+             'fail': ["+ + run()",
+                      " ++ run()"]}
+
+    _ip.user_ns['run'] = run
+
+    for code in tests['pass']:
+        check_cpaste(code)
+
+    for code in tests['fail']:
+        check_cpaste(code, should_fail=True)