Add tests to confirm constant routing import.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>

python/check_arch_api.py

@@ -18,6 +18,11 @@ pin connectivity tests. Example test_data.yaml:
 pip_test:
     - src_wire: CLBLM_R_X11Y93/CLBLM_L_D3
       dst_wire: SLICE_X15Y93.SLICEL/D3
+pip_chain_test:
+    - wires:
+        - $CONSTANTS_X0Y0.$CONSTANTS/$GND_SOURCE
+        - $CONSTANTS_X0Y0/$GND_NODE
+        - TIEOFF_X3Y145.TIEOFF/$GND_SITE_WIRE
 bel_pin_test:
     - bel: SLICE_X15Y93.SLICEL/D6LUT
       pin: A3
@@ -25,25 +30,48 @@ bel_pin_test:
 
 """
 import yaml
+import sys
+
+
 
 
 def check_arch_api(ctx):
+    success = True
     pips_tested = 0
+    pips_failed = 0
+
+    def test_pip(src_wire_name, dst_wire_name):
+        nonlocal success
+        nonlocal pips_tested
+        nonlocal pips_failed
+
+        pip = None
+        for pip_name in ctx.getPipsDownhill(src_wire_name):
+            if ctx.getPipDstWire(pip_name) == dst_wire_name:
+                pip = pip_name
+                src_wire = ctx.getPipSrcWire(pip_name)
+                assert src_wire == src_wire_name, (
+                        src_wire, src_wire_name)
+
+
+        if pip is None:
+            success = False
+            pips_failed += 1
+            print('Pip from {} to {} failed'.format(src_wire_name, dst_wire_name))
+        else:
+            pips_tested += 1
     bel_pins_tested = 0
     with open('test_data.yaml', 'r') as f:
         test_data = yaml.safe_load(f.read())
         if 'pip_test' in test_data:
             for pip_test in test_data['pip_test']:
-                pip = None
-                for pip_name in ctx.getPipsDownhill(pip_test['src_wire']):
-                    if ctx.getPipDstWire(pip_name) == pip_test['dst_wire']:
-                        pip = pip_name
-                        src_wire = ctx.getPipSrcWire(pip_name)
-                        assert src_wire == pip_test['src_wire'], (
-                                src_wire, pip_test['src_wire'])
+                test_pip(pip_test['src_wire'], pip_test['dst_wire'])
 
-                assert pip is not None
-                pips_tested += 1
+        if 'pip_chain_test' in test_data:
+            for chain_test in test_data['pip_chain_test']:
+                wires = chain_test['wires']
+                for src_wire, dst_wire in zip(wires, wires[1:]):
+                    test_pip(src_wire, dst_wire)
 
         if 'bel_pin_test' in test_data:
             for bel_pin_test in test_data['bel_pin_test']:
@@ -54,4 +82,9 @@ def check_arch_api(ctx):
 
     print('Tested {} pips and {} bel pins'.format(pips_tested, bel_pins_tested))
 
+    if not success:
+        print('{} pips failed'.format(pips_failed))
+        sys.exit(-1)
+
+
 check_arch_api(ctx)