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

Refuse to install event loop hooks when not using `prompt_toolkit` (#14132)...

Refuse to install event loop hooks when not using `prompt_toolkit` (#14132) Without this, `%gui` is effectively a no-op but the user thinks it works. For example. If running `ipython`: ``` In [1]: import matplotlib; matplotlib.use('QtAgg'); from matplotlib import pyplot; pyplot.ion(); pyplot.plot([1, 2, 3, 4]) Installed qt6 event loop hook. Out[1]: [<matplotlib.lines.Line2D at 0x1ba2f59d2a0>] ``` The window appears and responds as expected. If running `ipython --simple-prompt`, the user would see the same output, when in fact no event loop hook was installed since it's not supported without `prompt_toolkit`. The resulting Qt window is unresponsive because the event loop is not running, i.e. with `--simple-prompt`, Qt windows should block (but `pyplot` doesn't/can't know to do that) With this PR, the user will see: ``` In [1]: import matplotlib; matplotlib.use('QtAgg'); from matplotlib import pyplot; pyplot.ion(); pyplot.plot([1, 2, 3, 4]) Cannot install event loop hook for "qt" when running with `--simple-prompt`. NOTE: Tk is supported natively; use Tk apps and Tk backends with `--simple-prompt`. Out[1]: [<matplotlib.lines.Line2D at 0x170be0c0310>] ``` They'll still get an unresponsive Qt window, but they'll at least be told this can't work (while anything using Tk will work just fine).

Matthias Bussonnier - - Load All Authors

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      # coding: utf-8

      """Tests for the compilerop module.

      """

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2010-2011 The IPython Development Team.

      #

      #  Distributed under the terms of the BSD License.

      #

      #  The full license is in the file COPYING.txt, distributed with this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Imports

      #-----------------------------------------------------------------------------

      # Stdlib imports

      import linecache

      import sys

      # Our own imports

      from IPython.core import compilerop

      #-----------------------------------------------------------------------------

      # Test functions

      #-----------------------------------------------------------------------------

      def test_code_name():

          code = 'x=1'

          name = compilerop.code_name(code)

          assert name.startswith("<ipython-input-0")

      def test_code_name2():

          code = 'x=1'

          name = compilerop.code_name(code, 9)

          assert name.startswith("<ipython-input-9")

      def test_cache():

          """Test the compiler correctly compiles and caches inputs

          """

          cp = compilerop.CachingCompiler()

          ncache = len(linecache.cache)

          cp.cache('x=1')

          assert len(linecache.cache) > ncache

      def test_proper_default_encoding():

          # Check we're in a proper Python 2 environment (some imports, such

          # as GTK, can change the default encoding, which can hide bugs.)

          assert sys.getdefaultencoding() == "utf-8"

      def test_cache_unicode():

          cp = compilerop.CachingCompiler()

          ncache = len(linecache.cache)

          cp.cache(u"t = 'žćčšđ'")

          assert len(linecache.cache) > ncache

      def test_compiler_check_cache():

          """Test the compiler properly manages the cache.

          """

          # Rather simple-minded tests that just exercise the API

          cp = compilerop.CachingCompiler()

          cp.cache('x=1', 99)

          # Ensure now that after clearing the cache, our entries survive

          linecache.checkcache()

          assert any(

              k.startswith("<ipython-input-99") for k in linecache.cache

          ), "Entry for input-99 missing from linecache"

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				# coding: utf-8
				"""Tests for the compilerop module.
				"""
				#-----------------------------------------------------------------------------
				# Copyright (C) 2010-2011 The IPython Development Team.
				#
				# Distributed under the terms of the BSD License.
				#
				# The full license is in the file COPYING.txt, distributed with this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------

				# Stdlib imports
				import linecache
				import sys

				# Our own imports
				from IPython.core import compilerop

				#-----------------------------------------------------------------------------
				# Test functions
				#-----------------------------------------------------------------------------

				def test_code_name():
				code = 'x=1'
				name = compilerop.code_name(code)
				assert name.startswith("<ipython-input-0")


				def test_code_name2():
				code = 'x=1'
				name = compilerop.code_name(code, 9)
				assert name.startswith("<ipython-input-9")


				def test_cache():
				"""Test the compiler correctly compiles and caches inputs
				"""
				cp = compilerop.CachingCompiler()
				ncache = len(linecache.cache)
				cp.cache('x=1')
				assert len(linecache.cache) > ncache

				def test_proper_default_encoding():
				# Check we're in a proper Python 2 environment (some imports, such
				# as GTK, can change the default encoding, which can hide bugs.)
				assert sys.getdefaultencoding() == "utf-8"

				def test_cache_unicode():
				cp = compilerop.CachingCompiler()
				ncache = len(linecache.cache)
				cp.cache(u"t = 'žćčšđ'")
				assert len(linecache.cache) > ncache

				def test_compiler_check_cache():
				"""Test the compiler properly manages the cache.
				"""
				# Rather simple-minded tests that just exercise the API
				cp = compilerop.CachingCompiler()
				cp.cache('x=1', 99)
				# Ensure now that after clearing the cache, our entries survive
				linecache.checkcache()
				assert any(
				k.startswith("<ipython-input-99") for k in linecache.cache
				), "Entry for input-99 missing from linecache"