Run ci tests with multiple sets of extra dependencies.

This adds a matrix that runs the tests once with `packaging`, `yaml` and both.

* .github/workflows/ci.yml

* tests/test_req2flatpak.py : Skip yaml tests when pyyaml isn't installed.

.github/workflows/ci.yml

@@ -25,6 +25,9 @@ jobs:
 
   test:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        extras: ["packaging", "yaml", "packaging yaml"]
     steps:
       - name: Checkout
         uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v3.1.0
@@ -33,7 +36,7 @@ jobs:
         id: setup
         uses: ./.github/actions/setup
         with:
-          install-options: --without lint
+          install-options: --without lint --extras ${{matrix.extras}}
 
       - name: Run Tests
         run: make test

tests/test_req2flatpak.py

@@ -7,9 +7,13 @@
 from itertools import product
 from pathlib import Path
 from typing import List
+from unittest import skipUnless
 from unittest.mock import patch
 
-import yaml
+try:
+    import yaml
+except ImportError:
+    yaml = None  # type: ignore
 
 from req2flatpak import (
     DownloadChooser,
@@ -97,6 +101,7 @@ def test_cli_with_reqs_as_args(self):
         build_module = json.loads(result.stdout)
         self.validate_build_module(build_module)
 
+    @skipUnless(yaml, "The yaml extra dependency is needed for this feature.")
     def test_cli_with_reqs_as_args_yaml(self):
         """Runs req2flatpak in yaml mode by passing requirements as cmdline arg."""
         args = ["--requirements"] + self.requirements
@@ -118,6 +123,7 @@ def test_cli_with_reqs_as_file(self):
             build_module = json.loads(result.stdout)
             self.validate_build_module(build_module)
 
+    @skipUnless(yaml, "The yaml extra dependency is needed for this feature.")
     def test_cli_with_reqs_as_file_yaml(self):
         """Runs req2flatpak by passing requirements as requirements.txt file."""
         with tempfile.NamedTemporaryFile(mode="w+", encoding="utf-8") as req_file: