Minor polish unit tests

This PR (re-)names the unit test starter properly and improves for some unit tests the phrasing and formatting.

.github/workflows/unit_tests.yml

@@ -0,0 +1,41 @@
+name: testssl.sh CI
+
+on:
+  pull_request:
+    paths-ignore:
+      - 'utils/**'
+      - 'doc/**'
+      - 'bin/**'
+      - '**.md'
+      - '**.pem'
+      - '**.pdf'
+      - '**.html'
+      - 'LICENSE'
+      - 'Dockerfile'
+      - 'Dockerfile.git'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: ['ubuntu-22.04']
+        perl: ['5.26']
+    name: Perl ${{ matrix.perl }} on ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up perl
+        uses: shogo82148/actions-setup-perl@v1
+        with:
+          perl-version: ${{ matrix.perl }}
+      - run: perl -V
+      - name: Install deps
+        run: sudo apt install dnsutils jsonlint
+      - run: cpanm --notest Test::More
+      - run: cpanm --notest Data::Dumper
+      - run: cpanm --notest JSON
+      - run: cpanm --notest Text::Diff
+      - run: prove -v