Merge pull request qutip#1696 from hodgestar/fix/test-numpy-versions

Add support for specifying the numpy version in the CI test matrix and pin numpy to the latest 1.20.X by default.

.github/workflows/tests.yml

@@ -27,6 +27,7 @@ jobs:
         # matrix size; make sure to test all supported versions in some form.
         python-version: [3.9]
         case-name: [defaults]
+        numpy-requirement: [">=1.20,<1.21"]
         # Extra special cases.  In these, the new variable defined should always
         # be a truth-y value (hence 'nomkl: 1' rather than 'mkl: 0'), because
         # the lack of a variable is _always_ false-y, and the defaults lack all
@@ -38,6 +39,8 @@ jobs:
             os: ubuntu-latest
             python-version: 3.6
             scipy-requirement: ">=1.4,<1.5"
+            # let the old SciPy version select an appropriate numpy version:
+            numpy-requirement: ""
 
           # No MKL runs.  MKL is now the default for conda installations, but
           # not necessarily for pip.
@@ -51,6 +54,7 @@ jobs:
           - case-name: OpenMP
             os: ubuntu-latest
             python-version: 3.9
+            numpy-requirement: ">=1.20,<1.21"
             openmp: 1
 
           # Builds without Cython at runtime.  This is a core feature;
@@ -79,13 +83,13 @@ jobs:
           fi
           export CI_QUTIP_WITH_OPENMP=${{ matrix.openmp }}
           if [[ -z "${{ matrix.nomkl }}" ]]; then
-            conda install blas=*=mkl numpy "scipy${{ matrix.scipy-requirement }}"
+            conda install blas=*=mkl "numpy${{ matrix.numpy-requirement }}" "scipy${{ matrix.scipy-requirement }}"
           elif [[ "${{ matrix.os }}" =~ ^windows.*$ ]]; then
             # Conda doesn't supply forced nomkl builds on Windows, so we rely on
             # pip not automatically linking to MKL.
-            pip install numpy "scipy${{ matrix.scipy-requirement }}"
+            pip install "numpy${{ matrix.numpy-requirement }}" "scipy${{ matrix.scipy-requirement }}"
           else
-            conda install nomkl numpy "scipy${{ matrix.scipy-requirement }}"
+            conda install nomkl "numpy${{ matrix.numpy-requirement }}" "scipy${{ matrix.scipy-requirement }}"
           fi
           python -m pip install -e .[$QUTIP_TARGET]
           python -m pip install pytest-cov coveralls
@@ -95,6 +99,15 @@ jobs:
           conda list
           python -c "import qutip; qutip.about()"
 
+      - name: Environment information
+        run: |
+          uname -a
+          if [[ "ubuntu-latest" == "${{ matrix.os }}" ]]; then
+              hostnamectl
+              lscpu
+              free -h
+          fi
+
       - name: Run tests
         # If our tests are running for longer than an hour, _something_ is wrong
         # somewhere.  The GitHub default is 6 hours, which is a bit long to wait