Improve template path handling. Add synthesis tests

test/lib/synth_testcase.py

@@ -0,0 +1,36 @@
+from typing import List
+import subprocess
+import os
+
+import pytest
+
+from .base_testcase import BaseTestCase
+
+@pytest.mark.skipif(os.environ.get("SKIP_SYNTH_TESTS", False), reason="user skipped")
+class SynthTestCase(BaseTestCase):
+
+    def _get_synth_files(self) -> List[str]:
+        files = []
+        files.extend(self.cpuif.get_synth_files())
+        files.append("regblock_pkg.sv")
+        files.append("regblock.sv")
+
+        return files
+
+
+    def run_synth(self) -> None:
+        script = os.path.join(
+            os.path.dirname(__file__),
+            "synthesis/vivado/run.tcl"
+        )
+
+        cmd = [
+            "vivado", "-nojournal", "-notrace",
+            "-mode", "batch",
+            "-log", "out.log",
+            "-source", script,
+            "-tclargs"
+        ]
+        cmd.extend(self._get_synth_files())
+
+        subprocess.run(cmd, check=True)