Add tmt testcase for CI

.fmf/version

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+1

plans/itstool.fmf

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+summary: Basic smoke test for itstool
+discover:
+    how: fmf
+execute:
+    how: tmt
+prepare:
+    - name: ensure-test-xml
+      how: shell
+      script: |
+          echo "Current directory: $(pwd)"
+          echo "Listing files in the current directory:"
+          ls -l
+          echo "Checking if test.xml is available in the VM..."
+          if [ ! -f /usr/share/doc/itstool/examples/test.xml ]; then
+              echo "test.xml not found, copying it..."
+              mkdir -p /usr/share/doc/itstool/examples/
+              cp tests/test.xml /usr/share/doc/itstool/examples/
+          else
+              echo "test.xml found!"
+          fi

tests/main.fmf

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+require:
+- itstool
+test: bash ./run_tests.sh
+framework: shell

tests/run_tests.sh

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+#!/bin/bash -e
+
+# Debugging: Ensure the file exists
+echo "Checking for /usr/share/doc/itstool/examples/test.xml..."
+ls -l /usr/share/doc/itstool/examples/test.xml || exit 1
+
+# Proceed with the test
+cp /usr/share/doc/itstool/examples/test.xml /tmp/itstool_test/
+itstool /tmp/itstool_test/test.xml -o /tmp/itstool_test/test.generated.po
+diff /tmp/itstool_test/test.expected.po /tmp/itstool_test/test.generated.po
+
+# Define directories for output
+OUTPUT_DIR="/tmp/itstool_test"
+mkdir -p "$OUTPUT_DIR"
+
+# Test data
+TEST_XML="/usr/share/doc/itstool/examples/test.xml"
+EXPECTED_PO="$OUTPUT_DIR/test.expected.po"
+GENERATED_PO="$OUTPUT_DIR/test.generated.po"
+NORMALIZED_PO="$OUTPUT_DIR/test.normalized.po"
+
+# Create expected output
+cat > "$EXPECTED_PO" <<EOF
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\\n"
+"POT-Creation-Date: DATE_PLACEHOLDER"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\\n"
+"Language-Team: LANGUAGE <LL@li.org>\\n"
+"MIME-Version: 1.0\\n"
+"Content-Type: text/plain; charset=UTF-8\\n"
+"Content-Transfer-Encoding: 8bit\\n"
+
+#. (itstool) path: root/greeting
+#: test.xml:2
+msgid "Hello, World!"
+msgstr ""
+
+EOF
+
+# Copy test XML file
+cp "$TEST_XML" "$OUTPUT_DIR/test.xml"
+
+# Run itstool to generate PO file
+itstool -o "$GENERATED_PO" "$OUTPUT_DIR/test.xml"
+
+# Normalize the generated PO file
+sed -e "s|POT-Creation-Date: .*|POT-Creation-Date: DATE_PLACEHOLDER\"|" \
+    -e "s|#: .*test.xml|#: test.xml|g" \
+    "$GENERATED_PO" > "$NORMALIZED_PO"
+
+# Compare normalized PO file with expected output
+if diff -u "$EXPECTED_PO" "$NORMALIZED_PO"; then
+    echo "PASS: itstool successfully generated the expected PO file."
+else
+    echo "FAIL: The generated PO file does not match the expected output."
+    echo "Expected: $EXPECTED_PO"
+    echo "Generated: $NORMALIZED_PO"
+    exit 1
+fi
+

tests/test.xml

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+<root>
+  <greeting>Hello, World!</greeting>
+</root>