move tests for arm64v8, ppc64le, s390x from Travis CI to GHA using Do…

…cker and aptman/qus

.github/workflows/test-docker.yml

@@ -10,6 +10,11 @@ jobs:
       fail-fast: false
       matrix:
         docker: [
+          # Run slower jobs first to give them a headstart and reduce waiting time
+          ubuntu-20.04-focal-arm64v8,
+          ubuntu-20.04-focal-ppc64le,
+          ubuntu-20.04-focal-s390x,
+          # Then run the remainder
           alpine,
           amazon-2-amd64,
           arch,
@@ -22,6 +27,13 @@ jobs:
           ubuntu-20.04-focal-amd64,
         ]
         dockerTag: [master]
+        include:
+          - docker: "ubuntu-20.04-focal-arm64v8"
+            qemu-arch: "aarch64"
+          - docker: "ubuntu-20.04-focal-ppc64le"
+            qemu-arch: "ppc64le"
+          - docker: "ubuntu-20.04-focal-s390x"
+            qemu-arch: "s390x"
 
     name: ${{ matrix.docker }}
 
@@ -31,6 +43,11 @@ jobs:
     - name: Build system information
       run: python .github/workflows/system-info.py
 
+    - name: Set up QEMU
+      if: "matrix.qemu-arch"
+      run: |
+        docker run --rm --privileged aptman/qus -s -- -p ${{ matrix.qemu-arch }}
+
     - name: Docker pull
       run: |
         docker pull pythonpillow/${{ matrix.docker }}:${{ matrix.dockerTag }}