Fix summary for test examples job (#3095)

### Changes

Fix summary for `test examples` job

### Reason for changes

Broken summary table
https://github.com/openvinotoolkit/nncf/actions/runs/11858028774

### Tests

https://github.com/openvinotoolkit/nncf/actions/runs/11900534660

Author: AlexanderDokuchaev

.github/scripts/pytest_md_summary.py

@@ -9,51 +9,66 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""
-This script generates a summary table in Markdown format from an XML report generated by pytest.
-
-Usage in GitHub workflow:
-    - name: Test Summary
-    if: ${{ !cancelled() }}
-    run: |
-        python .github/scripts/generate_examples_summary.py pytest-results.xml >> $GITHUB_STEP_SUMMARY
-"""
-
 import sys
 import xml.etree.ElementTree as ET
 
-# Load the XML report generated by pytest
-xml_file = sys.argv[1]
-
-try:
-    tree = ET.parse(xml_file)
-except FileNotFoundError:
-    sys.exit(1)
-
-root = tree.getroot()
-
-# Build the summary table in Markdown format
-table_lines = []
-table_lines.append("| Test Name | Status | Time | Message |")
-table_lines.append("|:----------|:------:|-----:|:--------|")
-
-# Iterate over test cases
-for testcase in root.findall(".//testcase"):
-    test_name = testcase.get("name")
-    time_duration = float(testcase.get("time", "0"))
-    message = ""
-    if testcase.find("failure") is not None:
-        status = "$${\color{red}Failed}$$"
-        message = testcase.find("failure").get("message", "")
-    elif testcase.find("error") is not None:
-        status = "$${\color{red}Error}$$"
-    elif testcase.find("skipped") is not None:
-        status = "$${\color{orange}Skipped}$$"
-        message = testcase.find("skipped").get("message", "")
-    else:
-        status = "$${\color{green}Ok}$$"
-
-    # Append each row to the table
-    table_lines.append(f"| {test_name} | {status} | {time_duration:.0f} | {message} |")
-
-print("\n".join(table_lines))
+
+def parse_xml_report(xml_file) -> None:
+    """
+    Parse the XML report generated by pytest.
+
+    :param xml_file: Path to the XML report file
+    :return: None
+    """
+    try:
+        tree = ET.parse(xml_file)
+    except FileNotFoundError:
+        sys.exit(1)
+
+    root = tree.getroot()
+
+    # Build the summary table in Markdown format
+    table_lines = []
+    table_lines.append("| Test Name | Status | Time | Message |")
+    table_lines.append("|:----------|:------:|-----:|:--------|")
+
+    # Iterate over test cases
+    for testcase in root.findall(".//testcase"):
+        test_name = testcase.get("name")
+        time_duration = float(testcase.get("time", "0"))
+        message = ""
+        if testcase.find("failure") is not None:
+            status = "$${\color{red}Failed}$$"
+            message = testcase.find("failure").get("message", "")
+        elif testcase.find("error") is not None:
+            status = "$${\color{red}Error}$$"
+        elif testcase.find("skipped") is not None:
+            status = "$${\color{orange}Skipped}$$"
+            message = testcase.find("skipped").get("message", "")
+        else:
+            status = "$${\color{green}Ok}$$"
+
+        # Append each row to the table
+        if message:
+            message = message.splitlines()[0][:60]
+        table_lines.append(f"| {test_name} | {status} | {time_duration:.0f} | {message} |")
+
+    if len(table_lines) > 2:
+        # Print the summary table only if there are test cases
+        print("\n".join(table_lines))
+
+
+if __name__ == "__main__":
+    """
+    This script generates a summary table in Markdown format from an XML report generated by pytest.
+
+    Usage in GitHub workflow:
+        - name: Test Summary
+        if: ${{ !cancelled() }}
+        run: |
+            python .github/scripts/generate_examples_summary.py pytest-results.xml >> $GITHUB_STEP_SUMMARY
+    """
+    try:
+        parse_xml_report(sys.argv[1])
+    except Exception as e:
+        print(f"Error: {e}")