Added tests from trio's multierror test suite

.travis.yml

@@ -1,6 +1,5 @@
 language: python
-sudo: false
-dist: trusty
+dist: xenial
 
 matrix:
   include:
@@ -11,30 +10,12 @@ matrix:
       env: CHECK_FORMATTING=1
     # The pypy tests are slow, so list them early
     - python: pypy3.5
-    # Uncomment if you want to test on pypy nightly:
-    # - language: generic
-    #   env: USE_PYPY_NIGHTLY=1
-    - python: 3.5.0
     - python: 3.5.2
     - python: 3.6
-    # As of 2018-07-05, Travis's 3.7 and 3.8 builds only work if you
-    # use dist: xenial AND sudo: required
-    # See: https://github.com/python-trio/trio/pull/556#issuecomment-402879391
     - python: 3.7
-      dist: xenial
-      sudo: required
     - python: 3.8-dev
-      dist: xenial
-      sudo: required
-    - os: osx
-      language: generic
-      env: MACPYTHON=3.5.4
-    - os: osx
-      language: generic
-      env: MACPYTHON=3.6.6
-    - os: osx
-      language: generic
-      env: MACPYTHON=3.7.0
+  allow_failures:
+    - python: 3.8-dev
 
 script:
   - ci/travis.sh

README.rst

@@ -8,7 +8,7 @@ Python.
 
 This project is currently maintained by the `Trio project
 <https://trio.readthedocs.io>`__, but the goal is for some version of
-it to be merged into Python 3.8, so it can be used in both Trio and
+it to be merged into Python 3.9, so it can be used in both Trio and
 asyncio. For more information, see:
 https://github.com/python-trio/trio/issues/611
 

ci/travis.sh

@@ -2,55 +2,6 @@
 
 set -ex
 
-if [ "$TRAVIS_OS_NAME" = "osx" ]; then
-    curl -Lo macpython.pkg https://www.python.org/ftp/python/${MACPYTHON}/python-${MACPYTHON}-macosx10.6.pkg
-    sudo installer -pkg macpython.pkg -target /
-    ls /Library/Frameworks/Python.framework/Versions/*/bin/
-    PYTHON_EXE=/Library/Frameworks/Python.framework/Versions/*/bin/python3
-    # The pip in older MacPython releases doesn't support a new enough TLS
-    curl https://bootstrap.pypa.io/get-pip.py | sudo $PYTHON_EXE
-    sudo $PYTHON_EXE -m pip install virtualenv
-    $PYTHON_EXE -m virtualenv testenv
-    source testenv/bin/activate
-fi
-
-if [ "$USE_PYPY_NIGHTLY" = "1" ]; then
-    curl -fLo pypy.tar.bz2 http://buildbot.pypy.org/nightly/py3.5/pypy-c-jit-latest-linux64.tar.bz2
-    if [ ! -s pypy.tar.bz2 ]; then
-        # We know:
-        # - curl succeeded (200 response code; -f means "exit with error if
-        # server returns 4xx or 5xx")
-        # - nonetheless, pypy.tar.bz2 does not exist, or contains no data
-        # This isn't going to work, and the failure is not informative of
-        # anything involving this package.
-        ls -l
-        echo "PyPy3 nightly build failed to download – something is wrong on their end."
-        echo "Skipping testing against the nightly build for right now."
-        exit 0
-    fi
-    tar xaf pypy.tar.bz2
-    # something like "pypy-c-jit-89963-748aa3022295-linux64"
-    PYPY_DIR=$(echo pypy-c-jit-*)
-    PYTHON_EXE=$PYPY_DIR/bin/pypy3
-    ($PYTHON_EXE -m ensurepip \
-     && $PYTHON_EXE -m pip install virtualenv \
-     && $PYTHON_EXE -m virtualenv testenv) \
-        || (echo "pypy nightly is broken; skipping tests"; exit 0)
-    source testenv/bin/activate
-fi
-
-if [ "$USE_PYPY_RELEASE_VERSION" != "" ]; then
-    curl -fLo pypy.tar.bz2 https://bitbucket.org/squeaky/portable-pypy/downloads/pypy3.5-${USE_PYPY_RELEASE_VERSION}-linux_x86_64-portable.tar.bz2
-    tar xaf pypy.tar.bz2
-    # something like "pypy3.5-5.7.1-beta-linux_x86_64-portable"
-    PYPY_DIR=$(echo pypy3.5-*)
-    PYTHON_EXE=$PYPY_DIR/bin/pypy3
-    $PYTHON_EXE -m ensurepip
-    $PYTHON_EXE -m pip install virtualenv
-    $PYTHON_EXE -m virtualenv testenv
-    source testenv/bin/activate
-fi
-
 pip install -U pip setuptools wheel
 
 if [ "$CHECK_FORMATTING" = "1" ]; then

exceptiongroup/tests/conftest.py

@@ -0,0 +1,20 @@
+import pytest
+
+
+def pytest_addoption(parser):
+    parser.addoption("--run-slow", action="store_true", help="run slow tests")
+
+
+def pytest_configure(config):
+    config.addinivalue_line("markers", "slow: mark a time consuming test")
+
+
+def pytest_collection_modifyitems(config, items):
+    if config.getoption("--run-slow", True):
+        # --runslow given in cli: do not skip slow tests
+        return
+
+    skip_slow = pytest.mark.skip(reason="need --run-slow option to run")
+    for item in items:
+        if "slow" in item.keywords:
+            item.add_marker(skip_slow)