Merge pull request #664 from evalf/unittests

evalf · Dec 29, 2021 · 6b3f450 · 6b3f450
2 parents 48a0348 + 45a5141
commit 6b3f450
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diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
@@ -33,35 +33,30 @@ jobs:
           if-no-files-found: error
   test:
     needs: build-python-package
-    name: 'Test os: ${{ matrix.os }}, py: ${{ matrix.python-version }}, matrix: ${{ matrix.matrix-backend }}, nprocs: ${{ matrix.nprocs }}, numpy: ${{ matrix.numpy-version }}, tensorial: ${{ matrix.tensorial }}'
+    name: 'Test ${{ matrix.name }}'
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         include:
-          # base
-          - {os: ubuntu-latest , python-version: 3.9, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          # os
-          - {os: windows-latest, python-version: 3.9, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          - {os: macos-latest  , python-version: 3.9, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          # python-version
-          - {os: ubuntu-latest , python-version: 3.5, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          - {os: ubuntu-latest , python-version: 3.6, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          - {os: ubuntu-latest , python-version: 3.7, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          - {os: ubuntu-latest , python-version: 3.8, matrix-backend: numpy, nprocs: 1, numpy-version: latest}
-          # matrix-backend
-          - {os: ubuntu-latest , python-version: 3.9, matrix-backend: scipy, nprocs: 1, numpy-version: latest}
-          - {os: ubuntu-latest , python-version: 3.9, matrix-backend: mkl  , nprocs: 1, numpy-version: latest}
-          - {os: ubuntu-latest , python-version: 3.9, matrix-backend: mkl  , nprocs: 2, numpy-version: latest}
-          # nprocs
-          - {os: ubuntu-latest , python-version: 3.9, matrix-backend: numpy, nprocs: 2, numpy-version: latest}
-          # numpy-version
-          - {os: ubuntu-latest , python-version: 3.6, matrix-backend: numpy, nprocs: 1, numpy-version: 1.17  }
-          # tensorial
-          - {os: ubuntu-latest , python-version: 3.9, matrix-backend: numpy, nprocs: 1, numpy-version: latest, tensorial: test}
+          - {name: "baseline", os: ubuntu-latest, python-version: "3.10", matrix-backend: numpy, nprocs: 1}
+          - {name: "windows", os: windows-latest, python-version: "3.10", matrix-backend: numpy, nprocs: 1}
+          - {name: "macos", os: macos-latest, python-version: "3.10", matrix-backend: numpy, nprocs: 1}
+          - {name: "python 3.5", os: ubuntu-latest, python-version: "3.5", matrix-backend: numpy, nprocs: 1}
+          - {name: "python 3.6", os: ubuntu-latest, python-version: "3.6", matrix-backend: numpy, nprocs: 1}
+          - {name: "python 3.7", os: ubuntu-latest, python-version: "3.7", matrix-backend: numpy, nprocs: 1}
+          - {name: "python 3.8", os: ubuntu-latest, python-version: "3.8", matrix-backend: numpy, nprocs: 1}
+          - {name: "python 3.9", os: ubuntu-latest, python-version: "3.9", matrix-backend: numpy, nprocs: 1}
+          - {name: "scipy matrix", os: ubuntu-latest, python-version: "3.10", matrix-backend: scipy, nprocs: 1}
+          - {name: "mkl matrix", os: ubuntu-latest, python-version: "3.10", matrix-backend: mkl, nprocs: 1}
+          - {name: "mkl matrix parallel", os: ubuntu-latest, python-version: "3.10", matrix-backend: mkl, nprocs: 2}
+          - {name: "parallel", os: ubuntu-latest, python-version: "3.10", matrix-backend: numpy, nprocs: 2}
+          - {name: "numpy 1.17", os: ubuntu-latest, python-version: "3.6", matrix-backend: numpy, nprocs: 1, numpy-version: ==1.17}
+          - {name: "tensorial", os: ubuntu-latest, python-version: "3.10", matrix-backend: numpy, nprocs: 1, tensorial: test}
       fail-fast: false
     env:
       NUTILS_MATRIX: ${{ matrix.matrix-backend }}
       NUTILS_NPROCS: ${{ matrix.nprocs }}
+      NUTILS_DEBUG: all
       OMP_NUM_THREADS: 1
       VECLIB_MAXIMUM_THREADS: 1
       MKL_DYNAMIC: FALSE
@@ -71,6 +66,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+      - name: Move nutils directory
+        run: mv nutils _nutils
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v1
         with:
@@ -86,45 +83,62 @@ jobs:
       - name: Install Nutils and dependencies
         id: install
         env:
-          _os: ${{ matrix.os }}
-          _matrix: ${{ matrix.matrix-backend }}
-          _numpy: ${{ matrix.numpy-version }}
+          _numpy_version: ${{ matrix.numpy-version }}
         run: |
-          _deps="coverage treelog stringly matplotlib pillow meshio"
-          case "$_os" in
-            windows-latest) _deps="$_deps psutil";;
-          esac
-          case "$_matrix" in
-            scipy) _deps="$_deps scipy";;
-            mkl) _deps="$_deps mkl";;
-          esac
-          case "$_numpy" in
-            latest) _deps="$_deps numpy Sphinx scipy";;
-            *) _deps="$_deps numpy==$_numpy";;
-          esac
           python -um pip install --upgrade wheel
-          python -um pip install --upgrade $_deps
-          # Install Nutils from `dist` dir created in job
-          # `build-python-package`.
+          python -um pip install --upgrade coverage treelog stringly meshio numpy$_numpy_version
+          # Install Nutils from `dist` dir created in job `build-python-package`.
           python -um pip install --no-index --find-links ./dist nutils
+      - name: Install Scipy
+        if: ${{ matrix.matrix-backend == 'scipy' }}
+        run: python -um pip install --upgrade scipy
       - name: Configure MKL
-        id: configure-mkl
         if: ${{ matrix.matrix-backend == 'mkl' }}
-        run: python -um devtools.gha.configure_mkl
-      - name: Test
-        env:
-          NUTILS_DEBUG: all
         run: |
-          mkdir testenv
-          cp -r examples docs tests .coveragerc testenv
-          cd testenv
-          python -um coverage run -m unittest -bq
+          python -um pip install --upgrade mkl
+          python -um devtools.gha.configure_mkl
+      - name: Test
+        run: python -um coverage run -m unittest discover -b -q -t . -s tests
       - name: Post-process coverage
-        run: |
-          mv testenv/.coverage .
-          python -um devtools.gha.coverage_report_xml
+        run: python -um devtools.gha.coverage_report_xml
       - name: Upload coverage
         uses: codecov/codecov-action@v1
+  test-examples:
+    needs: build-python-package
+    name: 'Test examples ${{ matrix.os }}'
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      matrix:
+        os: [ubuntu, macos, windows]
+      fail-fast: false
+    env:
+      NUTILS_MATRIX: scipy
+      NUTILS_NPROCS: 1
+      NUTILS_DEBUG: all
+      OMP_NUM_THREADS: 1
+      VECLIB_MAXIMUM_THREADS: 1
+      PYTHONHASHSEED: 0
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Move nutils directory
+        run: mv nutils _nutils
+      - name: Set up Python
+        uses: actions/setup-python@v1
+      - name: Download Python package artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: python-package
+          path: dist/
+      - name: Install Nutils and dependencies
+        id: install
+        run: |
+          python -um pip install --upgrade wheel
+          python -um pip install --upgrade treelog stringly matplotlib scipy pillow numpy
+          # Install Nutils from `dist` dir created in job `build-python-package`.
+          python -um pip install --no-index --find-links ./dist nutils
+      - name: Test
+        run: python -um unittest discover -b -q -t . -s examples
   test-sphinx:
     name: Test building docs
     runs-on: ubuntu-20.04

diff --git a/examples/adaptivity.py b/examples/adaptivity.py
@@ -96,7 +96,6 @@ def main(etype:str, btype:str, degree:int, nrefine:int):
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_square_quadratic(self):
     ndofs, error, lhs = main(nrefine=2, btype='h-std', etype='square', degree=2)
     with self.subTest('degrees of freedom'):
@@ -112,7 +111,6 @@ def test_square_quadratic(self):
       7AYLvMPpsqGkCTPumzWf+qV92kKevjK36ozDP/FSnh1iteWiqWuf+oMaKuyKaC1i52rKPokiF2WLA/20
       bya+ZCPbWKRPpvgFaedebw==''')
 
-  @testing.requires('matplotlib')
   def test_triangle_quadratic(self):
     ndofs, error, lhs = main(nrefine=2, btype='h-std', etype='triangle', degree=2)
     with self.subTest('degrees of freedom'):
@@ -126,7 +124,6 @@ def test_triangle_quadratic(self):
       bQbyXYEiQWbKZjNM7wJVzjBlYICoPW8CMiXH+LXRR9NwoPkg82xN5IB2MZu2mGabSBnnAbGscYEJj3GV
       YQAQg/TVGfaA7RI0BsErRjeNeowDgDQPmF9gkmciaJxtArGjzrAKCGWNpYAQAL0kOBE=''')
 
-  @testing.requires('matplotlib')
   def test_mixed_linear(self):
     ndofs, error, lhs = main(nrefine=2, btype='h-std', etype='mixed', degree=1)
     with self.subTest('degrees of freedom'):

diff --git a/examples/burgers.py b/examples/burgers.py
@@ -75,39 +75,33 @@ def main(nelems:int, ndims:int, btype:str, degree:int, timescale:float, newtonto
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_1d_p0(self):
     lhs = main(ndims=1, nelems=10, timescale=.1, btype='discont', degree=0, endtime=.01, newtontol=1e-5)
     self.assertAlmostEqual64(lhs, '''
       eNrz1ttqGGOiZSZlrmbuZdZgcsEwUg8AOqwFug==''')
 
-  @testing.requires('matplotlib')
   def test_1d_p1(self):
     lhs = main(ndims=1, nelems=10, timescale=.1, btype='discont', degree=1, endtime=.01, newtontol=1e-5)
     self.assertAlmostEqual64(lhs, '''
       eNrbocann6u3yqjTyMLUwfSw2TWzKPNM8+9mH8wyTMNNZxptMirW49ffpwYAI6cOVA==''')
 
-  @testing.requires('matplotlib')
   def test_1d_p2(self):
     lhs = main(ndims=1, nelems=10, timescale=.1, btype='discont', degree=2, endtime=.01, newtontol=1e-5)
     self.assertAlmostEqual64(lhs, '''
       eNrr0c7SrtWfrD/d4JHRE6Ofxj6mnqaKZofNDpjZmQeYB5pHmL8we23mb5ZvWmjKY/LV6KPRFIMZ+o36
       8dp92gCxZxZG''')
 
-  @testing.requires('matplotlib')
   def test_1d_p1_legendre(self):
     lhs = main(ndims=1, nelems=10, timescale=.1, btype='legendre', degree=1, endtime=.01, newtontol=1e-5)
     self.assertAlmostEqual64(lhs, '''
       eNrbpbtGt9VQyNDfxMdYzczERNZczdjYnOdsoNmc01kmE870Gj49t0c36BIAAhsO1g==''')
 
-  @testing.requires('matplotlib')
   def test_1d_p2_legendre(self):
     lhs = main(ndims=1, nelems=10, timescale=.1, btype='legendre', degree=2, endtime=.01, newtontol=1e-5)
     self.assertAlmostEqual64(lhs, '''
       eNoBPADD/8ot2y2/K4UxITFFLk00RTNNLyY2KzTTKx43QjOOzzM3Ss0pz1A2qsvhKGk0jsyXL48xzc5j
       LswtIdLIK5SlF78=''')
 
-  @testing.requires('matplotlib')
   def test_2d_p1(self):
     lhs = main(ndims=2, nelems=4, timescale=.1, btype='discont', degree=1, endtime=.01, newtontol=1e-5)
     import os

diff --git a/examples/cahnhilliard.py b/examples/cahnhilliard.py
@@ -113,7 +113,6 @@ def main(nelems:int, etype:str, btype:str, degree:int, epsilon:typing.Optional[f
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_initial(self):
     state = main(nelems=3, etype='square', btype='std', degree=2, epsilon=None, contactangle=90, timestep=1, mtol=float('inf'), seed=0, circle=False, stab=stab.linear)
     with self.subTest('concentration'): self.assertAlmostEqual64(state['c'], '''
@@ -123,7 +122,6 @@ def test_initial(self):
       eNoBYgCd/w7NQModNFjLtckB0VA0rDCiM+zKBMzPygjMcMr4yJcy0MsUyXY0OcoxMFo19zE5Np/JMDTG
       yk7KGstQzFgwvMnDNXk0Msm+Njc3SjZizebJEjbPy1w25zLsNfQzSjURLRk3Qt4uBQ==''')
 
-  @testing.requires('matplotlib')
   def test_square(self):
     state = main(nelems=3, etype='square', btype='std', degree=2, epsilon=None, contactangle=90, timestep=1, mtol=.1, seed=0, circle=False, stab=stab.linear)
     with self.subTest('concentration'): self.assertAlmostEqual64(state['c'], '''
@@ -133,7 +131,6 @@ def test_square(self):
       eNpVyU0KgCAABeGrK9SiQCiQCsrwB8GjzLF8uJNvNYzBsuP5yGKmWlhxXKMSmxzchPGceF4iVU55+Ck0
       masD28JDNQ==''')
 
-  @testing.requires('matplotlib')
   def test_contactangle(self):
     state = main(nelems=3, etype='square', btype='std', degree=2, epsilon=None, contactangle=45, timestep=1, mtol=.1, seed=0, circle=False, stab=stab.linear)
     with self.subTest('concentration'): self.assertAlmostEqual64(state['c'], '''
@@ -143,7 +140,6 @@ def test_contactangle(self):
       eNoNzCEOggAYgNFLvbPguILeQRpWgyQPoAYCuBGhWHVzGshOLegMSvffS1/5EqmF2sUnTKJylbO3l6mZ
       pb2TZ5jLrDWObmGlUDroDWFjq43H3dcvaqdz9TCGP1tYLVU=''')
 
-  @testing.requires('matplotlib')
   def test_mixedcircle(self):
     state = main(nelems=3, etype='mixed', btype='std', degree=2, epsilon=None, contactangle=90, timestep=1, mtol=.1, seed=0, circle=True, stab=stab.linear)
     with self.subTest('concentration'): self.assertAlmostEqual64(state['c'], '''

diff --git a/examples/coil.py b/examples/coil.py
@@ -184,7 +184,6 @@ def main(nelems: int = 50, degree: int = 3, freq: float = 0., nturns: int = 1, r
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_dc(self):
     state = main(nelems=16, degree=2)
     with self.subTest('A.real'): self.assertAlmostEqual64(state['A'].real, '''
@@ -197,7 +196,6 @@ def test_dc(self):
       5JDUS01ILmEYOWzEJB/nKGep1y22j/AYD3AH3chjD6oRxRu+yDVcpN3U49K2wAV+xqP8kPu5i9u4jjfw
       HI1Ta9ihya2zLdRCh+kg7adGqqMtlKZVFKNpN+JyboFL2f8Z6oV2''')
 
-  @testing.requires('matplotlib')
   def test_ac_5(self):
     state = main(nelems=16, degree=2, freq=1000, nturns=5)
     with self.subTest('A.imag'): self.assertAlmostEqual64(state['A'].imag, '''

diff --git a/examples/cylinderflow.py b/examples/cylinderflow.py
@@ -129,7 +129,6 @@ def main(nelems:int, degree:int, reynolds:float, rotation:float, timestep:float,
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib', 'scipy')
   def test_rot0(self):
     state0, state = main(nelems=6, degree=3, reynolds=100, rotation=0, timestep=.1, maxradius=25, seed=0, endtime=.05)
     with self.subTest('initial condition'): self.assertAlmostEqual64(state0['u'], '''
@@ -144,7 +143,6 @@ def test_rot0(self):
       eNoBSAC3/4zF18aozR866DpHNSk8JDonOdw4k8VzNaHBk8PFOyI+Gj9vPPRA/T/LQDtBIECaP0i5yLsA
       wL9FwkabQsJJTbc2ubJHw7ZvRq/qITA=''')
 
-  @testing.requires('matplotlib', 'scipy')
   def test_rot1(self):
     state0, state = main(nelems=6, degree=3, reynolds=100, rotation=1, timestep=.1, maxradius=25, seed=0, endtime=.05)
     with self.subTest('initial condition'): self.assertAlmostEqual64(state0['u'], '''

diff --git a/examples/drivencavity-compatible.py b/examples/drivencavity-compatible.py
@@ -111,7 +111,6 @@ def postprocess(domain, ns, every=.05, spacing=.01, **arguments):
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_p2(self):
     state0, state1 = main(nelems=3, reynolds=100, degree=2)
     with self.subTest('stokes-velocity'): self.assertAlmostEqual64(state0['u'], '''
@@ -125,7 +124,6 @@ def test_p2(self):
       eNpbqpasrWa46TSTfoT+krO/de/pntA3Pnf2zFNtn2u2hglmAOKVDlE=''')
     with self.subTest('navier-stokes-multiplier'): self.assertAlmostEqual(state1['lm'], 0)
 
-  @testing.requires('matplotlib')
   def test_p3(self):
     state0, state1 = main(nelems=3, reynolds=100, degree=3)
     with self.subTest('stokes-velocity'): self.assertAlmostEqual64(state0['u'], '''

diff --git a/examples/drivencavity.py b/examples/drivencavity.py
@@ -106,7 +106,6 @@ def postprocess(domain, ns, every=.05, spacing=.01, **arguments):
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_square(self):
     state0, state1 = main(nelems=3, etype='square', reynolds=100, degree=3)
     with self.subTest('stokes-velocity'): self.assertAlmostEqual64(state0['u'], '''
@@ -129,7 +128,6 @@ def test_square(self):
       eNoNiT0OQEAYBdd5xD1cSOIMiIJGVJuIiliS9VNYKolkNG6j9BUvmZlnmJnoSAnx6RmFNSUVjgErRVOQ
       iFtWKTUZMQ2n/BuGnJaFi52bl48D73Fis+wjCpT6AWgsRHE=''')
 
-  @testing.requires('matplotlib')
   def test_mixed(self):
     state0, state1 = main(nelems=3, etype='mixed', reynolds=100, degree=2)
     with self.subTest('stokes-velocity'): self.assertAlmostEqual64(state0['u'], '''

diff --git a/examples/elasticity.py b/examples/elasticity.py
@@ -70,7 +70,6 @@ def main(nelems:int, etype:str, btype:str, degree:int, poisson:float):
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_default(self):
     cons, lhs = main(nelems=4, etype='square', btype='std', degree=1, poisson=.25)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''
@@ -79,7 +78,6 @@ def test_default(self):
       eNpjYMAEKcaiRmLGQQZCxgwMYsbrzqcYvz672KTMaIKJimG7CQPDBJM75xabdJ3NMO0xSjG1MUw0Beox
       PXIuw7Tk7A/TXqMfQLEfQLEfQLEfpsVnAUzzHtI=''')
 
-  @testing.requires('matplotlib')
   def test_mixed(self):
     cons, lhs = main(nelems=4, etype='mixed', btype='std', degree=1, poisson=.25)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''
@@ -88,7 +86,6 @@ def test_mixed(self):
       eNpjYICAJGMOI3ljcQMwx3i/JohSMr51HkQnGP8422eiYrjcJM+o3aToWq/Jy3PLTKafzTDtM0oxtTRM
       MF2okmJ67lyGacnZH6aOhj9Mu41+mMZq/DA9dO6HaflZAAMdIls=''')
 
-  @testing.requires('matplotlib')
   def test_quadratic(self):
     cons, lhs = main(nelems=4, etype='square', btype='std', degree=2, poisson=.25)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''
@@ -100,7 +97,6 @@ def test_quadratic(self):
       PjER/0DIDAE/6ICVCjh2Id/ZiBdslY+LrpiOmLaYhJ90IibhNdcW0xHTFTPhUzPhX8h5W3rRuZicV1zO
       N3bCgXRUeDFedjxvSc/ai/G86jzfWi87Xswfg5Nx3Q==''')
 
-  @testing.requires('matplotlib')
   def test_poisson(self):
     cons, lhs = main(nelems=4, etype='square', btype='std', degree=1, poisson=.4)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''

diff --git a/examples/finitestrain.py b/examples/finitestrain.py
@@ -87,7 +87,6 @@ def main(nelems:int, etype:str, btype:str, degree:int, poisson:float, angle:floa
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_default(self):
     lhs0, lhs1 = main(nelems=4, etype='square', btype='std', degree=1, poisson=.25, angle=10, restol=1e-8, trim=False)
     with self.subTest('linear'): self.assertAlmostEqual64(lhs0, '''
@@ -97,7 +96,6 @@ def test_default(self):
       eNpjYMAEZdrKl2/p37soY1h84aKh2/lmI4Zz7loq5y0MD55rNtI652Rcefa48aUzzZcjzj4ylDjrYnz6
       jIBJ8Zl2E9Yzty9InlE2+nB6o/HJ090my04rm7acBgAKcSdV''')
 
-  @testing.requires('matplotlib')
   def test_mixed(self):
     lhs0, lhs1 = main(nelems=4, etype='mixed', btype='std', degree=1, poisson=.25, angle=10, restol=1e-8, trim=False)
     with self.subTest('linear'): self.assertAlmostEqual64(lhs0, '''
@@ -107,7 +105,6 @@ def test_mixed(self):
       eNpjYIAA7fv2l6UMEi6C2H8N7l0A0VcMzc+D6H4jznPyhpfOdelwnm80EjznYTz57CnjG2eWX0o/+9VQ
       +KyT8cUzzCbZZ2abiJ9RNvpw+vYFyTMbjU+e7jZZdlrZtOU0AJN4KHY=''')
 
-  @testing.requires('matplotlib')
   def test_spline(self):
     lhs0, lhs1 = main(nelems=4, etype='square', btype='spline', degree=2, poisson=.25, angle=10, restol=1e-8, trim=False)
     with self.subTest('linear'): self.assertAlmostEqual64(lhs0, '''

diff --git a/examples/laplace.py b/examples/laplace.py
@@ -130,7 +130,6 @@ def main(nelems:int, etype:str, btype:str, degree:int):
 
 class test(testing.TestCase):
 
-  @testing.requires('matplotlib')
   def test_default(self):
     cons, lhs, err = main(nelems=4, etype='square', btype='std', degree=1)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''
@@ -141,7 +140,6 @@ def test_default(self):
     with self.subTest('L2-error'):
       self.assertAlmostEqual(err, 1.63e-3, places=5)
 
-  @testing.requires('matplotlib')
   def test_spline(self):
     cons, lhs, err = main(nelems=4, etype='square', btype='spline', degree=2)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''
@@ -152,7 +150,6 @@ def test_spline(self):
     with self.subTest('L2-error'):
       self.assertAlmostEqual(err, 8.04e-5, places=7)
 
-  @testing.requires('matplotlib')
   def test_mixed(self):
     cons, lhs, err = main(nelems=4, etype='mixed', btype='std', degree=2)
     with self.subTest('constraints'): self.assertAlmostEqual64(cons, '''