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import os.path
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import nose.tools as nt
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import IPython.testing.tools as tt
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from IPython.utils.syspathcontext import prepended_to_syspath
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from IPython.utils.tempdir import TemporaryDirectory
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ext1_content = """
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def load_ipython_extension(ip):
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print("Running ext1 load")
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def unload_ipython_extension(ip):
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print("Running ext1 unload")
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"""
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ext2_content = """
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def load_ipython_extension(ip):
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print("Running ext2 load")
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"""
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def test_extension_loading():
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em = get_ipython().extension_manager
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with TemporaryDirectory() as td:
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ext1 = os.path.join(td, 'ext1.py')
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with open(ext1, 'w') as f:
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f.write(ext1_content)
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ext2 = os.path.join(td, 'ext2.py')
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with open(ext2, 'w') as f:
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f.write(ext2_content)
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with prepended_to_syspath(td):
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assert 'ext1' not in em.loaded
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assert 'ext2' not in em.loaded
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# Load extension
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with tt.AssertPrints("Running ext1 load"):
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assert em.load_extension('ext1') is None
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assert 'ext1' in em.loaded
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# Should refuse to load it again
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with tt.AssertNotPrints("Running ext1 load"):
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assert em.load_extension('ext1') == 'already loaded'
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# Reload
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with tt.AssertPrints("Running ext1 unload"):
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with tt.AssertPrints("Running ext1 load", suppress=False):
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em.reload_extension('ext1')
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# Unload
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with tt.AssertPrints("Running ext1 unload"):
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assert em.unload_extension('ext1') is None
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# Can't unload again
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with tt.AssertNotPrints("Running ext1 unload"):
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assert em.unload_extension('ext1') == 'not loaded'
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assert em.unload_extension('ext2') == 'not loaded'
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# Load extension 2
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with tt.AssertPrints("Running ext2 load"):
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assert em.load_extension('ext2') is None
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# Can't unload this
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assert em.unload_extension('ext2') == 'no unload function'
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# But can reload it
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with tt.AssertPrints("Running ext2 load"):
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em.reload_extension('ext2')
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