upstream/ipython Files · IPython/core/tests/test_alias.py

Remove EventManager reset methods, because they violate encapsulation....

Remove EventManager reset methods, because they violate encapsulation. The whole idea of the EventManager is that you can register hooks without worrying about what hooks other pieces of code might be registering. The reset methods violate this separation of concerns, since they will blow away everyone else's hooks too. (See gh-6680 for an example of this breaking things.) Since there is never any safe way to use them, we simply remove them entirely.

Thomas Kluyver - - Load All Authors

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             test_alias.py
        
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      from IPython.utils.capture import capture_output

      import nose.tools as nt

      def test_alias_lifecycle():

          name = 'test_alias1'

          cmd = 'echo "Hello"'

          am = _ip.alias_manager

          am.clear_aliases()

          am.define_alias(name, cmd)

          assert am.is_alias(name)

          nt.assert_equal(am.retrieve_alias(name), cmd)

          nt.assert_in((name, cmd), am.aliases)

          # Test running the alias

          orig_system = _ip.system

          result = []

          _ip.system = result.append

          try:

              _ip.run_cell('%{}'.format(name))

              result = [c.strip() for c in result]

              nt.assert_equal(result, [cmd])

          finally:

              _ip.system = orig_system

          # Test removing the alias

          am.undefine_alias(name)

          assert not am.is_alias(name)

          with nt.assert_raises(ValueError):

              am.retrieve_alias(name)

          nt.assert_not_in((name, cmd), am.aliases)

      def test_alias_args_error():

          """Error expanding with wrong number of arguments"""

          _ip.alias_manager.define_alias('parts', 'echo first %s second %s')

          # capture stderr:

          with capture_output() as cap:

              _ip.run_cell('parts 1')

          nt.assert_equal(cap.stderr.split(':')[0], 'UsageError')

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				from IPython.utils.capture import capture_output

				import nose.tools as nt

				def test_alias_lifecycle():
				name = 'test_alias1'
				cmd = 'echo "Hello"'
				am = _ip.alias_manager
				am.clear_aliases()
				am.define_alias(name, cmd)
				assert am.is_alias(name)
				nt.assert_equal(am.retrieve_alias(name), cmd)
				nt.assert_in((name, cmd), am.aliases)

				# Test running the alias
				orig_system = _ip.system
				result = []
				_ip.system = result.append
				try:
				_ip.run_cell('%{}'.format(name))
				result = [c.strip() for c in result]
				nt.assert_equal(result, [cmd])
				finally:
				_ip.system = orig_system

				# Test removing the alias
				am.undefine_alias(name)
				assert not am.is_alias(name)
				with nt.assert_raises(ValueError):
				am.retrieve_alias(name)
				nt.assert_not_in((name, cmd), am.aliases)


				def test_alias_args_error():
				"""Error expanding with wrong number of arguments"""
				_ip.alias_manager.define_alias('parts', 'echo first %s second %s')
				# capture stderr:
				with capture_output() as cap:
				_ip.run_cell('parts 1')

				nt.assert_equal(cap.stderr.split(':')[0], 'UsageError')