Add helper script to run tests

run_tests.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+"""Run novelWriter Tests."""
+
+import argparse
+import os
+import subprocess
+import sys
+
+if __name__ == "__main__":
+    """Parse command line options and run the commands."""
+    parser = argparse.ArgumentParser(usage="run_tests.py [--flags]")
+    parser.add_argument("-o", action="store_true", help="Run off screen")
+    parser.add_argument("-r", action="store_true", help="Generate reports")
+    parser.add_argument("-t", action="store_true", help="Generate terminal report")
+    parser.add_argument("-m", help="Test modules")
+    parser.add_argument("-k", help="Test filters")
+
+    args = parser.parse_args()
+
+    env = os.environ.copy()
+    cmd = [sys.executable, "-m", "pytest", "-vv"]
+
+    if args.o:
+        env["QT_QPA_PLATFORM"] = "offscreen"
+    if args.r or args.t:
+        cmd += ["--cov=novelwriter"]
+    if args.r:
+        cmd += ["--cov-report=xml", "--cov-report=html"]
+    if args.t:
+        cmd += ["--cov-report=term"]
+    if args.m:
+        cmd += ["-m", args.m]
+    if args.k:
+        cmd += ["-k", args.k]
+
+    subprocess.call(cmd, env=env)