Add test for perl-tester images

Author: atoomic

.github/workflows/check.yml

@@ -37,7 +37,9 @@ jobs:
         run: |
           cpm --version
 
+  ### ------------------------------------------------
   ### Install a single module
+  ### ------------------------------------------------
 
   one_module:
     runs-on: ubuntu-latest
@@ -49,7 +51,9 @@ jobs:
         with:
           install: "Simple::Accessor"
 
+  ### ------------------------------------------------
   ### Install multiple modules
+  ### ------------------------------------------------
 
   multiple_modules:
     runs-on: ubuntu-latest
@@ -63,7 +67,9 @@ jobs:
             Simple::Accessor
             Test::Parallel
 
+  ### ------------------------------------------------
   ### Install modules from a cpanfile
+  ### ------------------------------------------------
 
   cpanfile_root:
     runs-on: ubuntu-latest
@@ -94,7 +100,9 @@ jobs:
           global: false
           path: "cpm"
 
+  ### ------------------------------------------------
   ### Install a module and enable tests
+  ### ------------------------------------------------
 
   with_tests:
     runs-on: ubuntu-latest
@@ -107,7 +115,9 @@ jobs:
           install: "Simple::Accessor"
           tests: true
 
+  ### ------------------------------------------------
   ### check perl-tester
+  ### ------------------------------------------------
 
   perl_tester:
     runs-on: ubuntu-latest
@@ -133,7 +143,9 @@ jobs:
           global: true
           sudo: false
 
+  ### ------------------------------------------------
   ### Use some custom args to install
+  ### ------------------------------------------------
 
   with_args:
     runs-on: ubuntu-latest
@@ -148,3 +160,38 @@ jobs:
         with:
           cpanfile: "cpanfile.test"
           args: "--with-recommends --with-suggests"
+
+  ## ------------------------------------------------
+  ## testing with Perl from perl-tester
+  ## ------------------------------------------------
+  perl:
+    runs-on: ubuntu-latest
+    name: "perl v${{ matrix.perl-version }}"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        perl-version:
+          - "5.30"
+          - "5.28"
+          # ...
+
+    container:
+      image: perldocker/perl-tester:${{ matrix.perl-version }}
+
+    steps:
+      - name: perl -V
+        run: perl -V
+
+      - uses: actions/checkout@v2
+      - name: "install-with-cpm"
+
+        uses: ./
+        with:
+          sudo: false
+          install: |
+            abbreviation
+            ACH
+      # checking that both modules are installed
+      - run: perl -Mabbreviation -e1
+      - run: perl -MACH -e1

README.md

@@ -25,10 +25,11 @@ This action installs 'cpm' as root so you can then use it in your workflow.
 #     perl: 'perl'
 ```
 
-## Using it in a GitHub workflow
+## Using install-with-cpm in a GitHub workflow
 
 Here is a sample integration using install-with-cpm action
-to test your Perl Module using multiple Perl versions.
+to test your Perl Modules using multiple Perl versions via the
+perl-tester images.
 
 ```yaml
 # .github/workflows/linux.yml