Try harder

.travis.yml

@@ -24,14 +24,15 @@ env:
 matrix:
   fast_finish: true
   include:
-  - os: osx
-    language: generic
-    env:
-      - USE_PIP=true
   - python: 3.7
     env:
       - PYTHON=3.7
       - ARCH_CYTHON_COVERAGE=true
+  - os: osx
+    osx_image:  xcode11.3
+    language: generic
+    env:
+      - USE_PIP=true
   - python: 3.8
     env:
       - PYTHON=3.8
@@ -82,6 +83,8 @@ matrix:
       - PYTEST_PATTERN="(slow or not slow)"
 
 before_install:
+  - source ci/travis-osx-setup.sh
+  - python --version
   - git fetch --tags
   # Avoid noise from matplotlib
   - mkdir -p $HOME/.config/matplotlib
@@ -101,20 +104,19 @@ before_install:
 install:
   - |
     if [[ "$COVERAGE" == true ]]; then
-      pip install -e .
+      pip install -e . --no-build-isolation
     else
       pip install .
     fi
 
 script:
   - set -e
   - python ci/performance.py
-  - echo pytest -r a -m "$PYTEST_PATTERN" ${COVERAGE_OPTS} --durations=25 arch
   - |
     if [[ "$COVERAGE" == true ]]; then
+      echo pytest -r a -m "$PYTEST_PATTERN" ${COVERAGE_OPTS} --durations=25 arch/tests/univariate/test_rescale.py
       pytest -r a -m "$PYTEST_PATTERN" ${COVERAGE_OPTS} --durations=25 arch
     else
-      pip install .
       mkdir arch_test
       cd arch_test
       python -c "import arch; arch.test(['-r a','-m (not slow)'])"

arch/tests/univariate/test_rescale.py

@@ -1,5 +1,3 @@
-import sys
-
 import numpy as np
 from numpy.testing import assert_allclose
 import pandas as pd
@@ -36,12 +34,11 @@ def test_reproducibility(small_data, small_data2):
     pd.testing.assert_series_equal(small_data, small_data2)
 
 
-@pytest.mark.skipif(sys.platform == "darwin", reason="Buggy on OSX/pip NumPy")
 def test_blank(small_data, std_data):
     small_mod = ZeroMean(small_data, volatility=GARCH(), rescale=False)
-    small_res = small_mod.fit(disp="off")
+    small_res = small_mod.fit()
     mod = ZeroMean(std_data, volatility=GARCH(), rescale=False)
-    res = mod.fit(disp="off")
+    res = mod.fit()
     assert_allclose(1e3 * small_res.params[0], res.params[0], rtol=5e-3)
 
 

ci/travis-osx-setup.sh

@@ -0,0 +1,14 @@
+if [ "$TRAVIS_OS_NAME" = "osx" ]; then
+  echo "OSX Python Information"
+  python3 --version
+  which python3
+  which pip3
+  echo unlink /usr/local/bin/python
+  unlink /usr/local/bin/python
+  echo ln -s /usr/local/bin/python3 /usr/local/bin/python
+  ln -s /usr/local/bin/python3 /usr/local/bin/python
+  echo unlink /usr/local/bin/pip
+  unlink /usr/local/bin/pip
+  echo ln -s /usr/local/bin/pip3 /usr/local/bin/pip
+  ln -s /usr/local/bin/pip3 /usr/local/bin/pip
+fi