scripts: twister: harness: pytest: add support for custom cmd line args

Add support for passing custom command line arguments to a pytest
harness in twister.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

doc/guides/test/twister.rst

@@ -369,11 +369,14 @@ harness_config: <harness configuration options>
 
         Only one fixture can be defined per testcase.
 
-    pytest_root: <pytest dirctory> (default pytest)
+    pytest_root: <pytest directory> (default pytest)
         Specify a pytest directory which need to excute when test case begin to running,
         default pytest directory name is pytest, after pytest finished, twister will
         check if this case pass or fail according the pytest report.
 
+    pytest_args: <list of arguments> (default empty)
+        Specify a list of additional arguments to pass to ``pytest``.
+
     The following is an example yaml file with a few harness_config options.
 
     ::

scripts/pylib/twister/harness.py

@@ -131,11 +131,13 @@ class Pytest(Harness):
         self.running_dir = instance.build_dir
         self.source_dir = instance.testcase.source_dir
         self.pytest_root = 'pytest'
+        self.pytest_args = []
         self.is_pytest = True
         config = instance.testcase.harness_config
 
         if config:
             self.pytest_root = config.get('pytest_root', 'pytest')
+            self.pytest_args = config.get('pytest_args', [])
 
     def handle(self, line):
         ''' Test cases that make use of pytest more care about results given
@@ -164,6 +166,9 @@ class Pytest(Harness):
 			'-q'
         ]
 
+        for arg in self.pytest_args:
+            cmd.append(arg)
+
         log = open(log_file, "a")
         outs = []
         errs = []

scripts/schemas/twister/testcase-schema.yaml

@@ -65,6 +65,11 @@ mapping:
           "pytest_root":
             type: str
             required: false
+          "pytest_args":
+            type: seq
+            required: false
+            sequence:
+              - type: str
           "regex":
             type: seq
             required: false
@@ -193,6 +198,11 @@ mapping:
               "pytest_root":
                 type: str
                 required: false
+              "pytest_args":
+                type: seq
+                required: false
+                sequence:
+                  - type: str
               "regex":
                 type: seq
                 required: false