Add a method for validating flow rules to the testpmd shell class.
Implement test case skipping for flow rules that do not pass
validation.

Signed-off-by: Dean Marx <dmarx@iol.unh.edu>
---
 dts/framework/remote_session/testpmd_shell.py | 15 ++++
 dts/framework/test_run.py                     |  3 +
 dts/framework/test_suite.py                   | 21 ++++-
 dts/tests/TestSuite_flow.py                   | 90 +++++++++++++------
 4 files changed, 102 insertions(+), 27 deletions(-)

diff --git a/dts/framework/remote_session/testpmd_shell.py b/dts/framework/remote_session/testpmd_shell.py
index bd5f2659bd..c2c7ade60a 100644
--- a/dts/framework/remote_session/testpmd_shell.py
+++ b/dts/framework/remote_session/testpmd_shell.py
@@ -1961,6 +1961,21 @@ def flow_create(self, flow_rule: FlowRule, port_id: int) -> int:
             self._logger.debug(f"Failed to create flow rule:\n{flow_output}")
             raise InteractiveCommandExecutionError(f"Failed to create flow rule:\n{flow_output}")

+    def flow_validate(self, flow_rule: FlowRule, port_id: int) -> bool:
+        """Validates a flow rule in the testpmd session.
+
+        Args:
+            flow_rule: :class:`FlowRule` object used for validating testpmd flow rule.
+            port_id: Integer representing the port to use.
+
+        Returns:
+            Boolean representing whether rule is valid or not.
+        """
+        flow_output = self.send_command(f"flow validate {port_id} {flow_rule}")
+        if "Flow rule validated" in flow_output:
+            return True
+        return False
+
     def flow_delete(self, flow_id: int, port_id: int, verify: bool = True) -> None:
         """Deletes the specified flow rule from the testpmd session.

diff --git a/dts/framework/test_run.py b/dts/framework/test_run.py
index 0fdc57ea9c..cf4af19e8f 100644
--- a/dts/framework/test_run.py
+++ b/dts/framework/test_run.py
@@ -644,6 +644,9 @@ def next(self) -> State | None:
                 return self

             self.result.update(Result.FAIL, e)
+        except SkippedTestException as e:
+            self.logger.info(f"Test case execution SKIPPED: {e}")
+            self.result.update(Result.SKIP, e)
         else:
             self.result.update(Result.PASS)
             self.logger.info(f"{self.description.capitalize()} PASSED.")
diff --git a/dts/framework/test_suite.py b/dts/framework/test_suite.py
index e07c327b77..34e9eb54ea 100644
--- a/dts/framework/test_suite.py
+++ b/dts/framework/test_suite.py
@@ -39,7 +39,7 @@
     PacketFilteringConfig,
 )

-from .exception import ConfigurationError, InternalError, TestCaseVerifyError
+from .exception import ConfigurationError, InternalError, SkippedTestException, TestCaseVerifyError
 from .logger import DTSLogger, get_dts_logger
 from .utils import get_packet_summaries, to_pascal_case

@@ -411,6 +411,25 @@ def _fail_test_case_verify(self, failure_description: str) -> None:
             self._logger.debug(command_res.command)
         raise TestCaseVerifyError(failure_description)

+    def verify_skip(self, condition: bool, skip_reason: str) -> None: