[PATCH v1] dts: add default values for queue info

[Andrew Bailey]

Currently, an error is raised on some environments when running the
queue start stop test suite due to fields failing to populate with no
default. These fields are not accessed by the test suite and this commit
handles this case gracefully by setting the default to None instead of
crashing.

Bugzilla ID: 1901

Signed-off-by: Andrew Bailey <abailey at iol.unh.edu>
---
 dts/api/testpmd/__init__.py |  8 +++++++-
 dts/api/testpmd/types.py    | 28 +++++++++++++++++++++-------
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/dts/api/testpmd/__init__.py b/dts/api/testpmd/__init__.py
index 703cae487e..a9724df7e4 100644
--- a/dts/api/testpmd/__init__.py
+++ b/dts/api/testpmd/__init__.py
@@ -1293,9 +1293,15 @@ def start_port_queue(
                 )
 
     def get_queue_ring_size(self, port_id: int, queue_id: int, is_rx_queue: bool) -> int:
-        """Returns the current size of the ring on the specified queue."""
+        """Returns the current size of the ring on the specified queue.
+
+        Raises:
+            ValueError: If ring size could not be parsed from test pmd.
+        """
         command = f"show {'rxq' if is_rx_queue else 'txq'} info {port_id} {queue_id}"
         queue_info = TestPmdQueueInfo.parse(self.send_command(command))
+        if queue_info.ring_size is None:
+            raise ValueError("Ring size could not be gathered from test pmd.")
         return queue_info.ring_size
 
     def set_queue_ring_size(
diff --git a/dts/api/testpmd/types.py b/dts/api/testpmd/types.py
index 0d322aece2..a6cfcccfa0 100644
--- a/dts/api/testpmd/types.py
+++ b/dts/api/testpmd/types.py
@@ -400,19 +400,33 @@ class TestPmdQueueInfo(TextParser):
     """Dataclass representation of the common parts of the testpmd `show rxq/txq info` commands."""
 
     #:
-    prefetch_threshold: int = field(metadata=TextParser.find_int(r"prefetch threshold: (\d+)"))
+    prefetch_threshold: int | None = field(
+        default=None, metadata=TextParser.find_int(r"prefetch threshold: (\d+)")
+    )
     #:
-    host_threshold: int = field(metadata=TextParser.find_int(r"host threshold: (\d+)"))
+    host_threshold: int | None = field(
+        default=None, metadata=TextParser.find_int(r"host threshold: (\d+)")
+    )
     #:
-    writeback_threshold: int = field(metadata=TextParser.find_int(r"writeback threshold: (\d+)"))
+    writeback_threshold: int | None = field(
+        default=None, metadata=TextParser.find_int(r"writeback threshold: (\d+)")
+    )
     #:
-    free_threshold: int = field(metadata=TextParser.find_int(r"free threshold: (\d+)"))
+    free_threshold: int | None = field(
+        default=None, metadata=TextParser.find_int(r"free threshold: (\d+)")
+    )
     #:
-    deferred_start: bool = field(metadata=TextParser.find("deferred start: on"))
+    deferred_start: bool | None = field(
+        default=None, metadata=TextParser.find("deferred start: on")
+    )
     #: The number of RXD/TXDs is just the ring size of the queue.
-    ring_size: int = field(metadata=TextParser.find_int(r"Number of (?:RXDs|TXDs): (\d+)"))
+    ring_size: int | None = field(
+        default=None, metadata=TextParser.find_int(r"Number of (?:RXDs|TXDs): (\d+)")
+    )
     #:
-    is_queue_started: bool = field(metadata=TextParser.find("queue state: started"))
+    is_queue_started: bool | None = field(
+        default=None, metadata=TextParser.find("queue state: started")
+    )
     #:
     burst_mode: str | None = field(
         default=None, metadata=TextParser.find(r"Burst mode: ([^\r\n]+)")
-- 
2.50.1