Run pydot/graphviz tests in CI

Closes #151

environment.yml

@@ -50,4 +50,5 @@ dependencies:
   - typing_extensions
   # optional
   - cython
-
+  - graphviz
+  - pydot

tests/d3viz/test_d3viz.py

@@ -9,7 +9,7 @@
 from pytensor import compile
 from pytensor.compile.function import function
 from pytensor.configdefaults import config
-from pytensor.d3viz.formatting import pydot_imported, pydot_imported_msg
+from pytensor.printing import pydot_imported, pydot_imported_msg
 from tests.d3viz import models
 
 

tests/d3viz/test_formatting.py

@@ -2,7 +2,8 @@
 import pytest
 
 from pytensor import config, function
-from pytensor.d3viz.formatting import PyDotFormatter, pydot_imported, pydot_imported_msg
+from pytensor.d3viz.formatting import PyDotFormatter
+from pytensor.printing import pydot_imported, pydot_imported_msg
 
 
 if not pydot_imported:
@@ -21,21 +22,23 @@ def node_counts(self, graph):
         nc = dict(zip(a, b))
         return nc
 
-    def test_mlp(self):
+    @pytest.mark.parametrize("mode", ["FAST_RUN", "FAST_COMPILE"])
+    def test_mlp(self, mode):
         m = models.Mlp()
-        f = function(m.inputs, m.outputs)
+        f = function(m.inputs, m.outputs, mode=mode)
         pdf = PyDotFormatter()
         graph = pdf(f)
-        expected = 11
-        if config.mode == "FAST_COMPILE":
-            expected = 12
+        if mode == "FAST_RUN":
+            expected = 13
+        elif mode == "FAST_COMPILE":
+            expected = 14
         assert len(graph.get_nodes()) == expected
         nc = self.node_counts(graph)
 
-        if config.mode == "FAST_COMPILE":
-            assert nc["apply"] == 6
-        else:
-            assert nc["apply"] == 5
+        if mode == "FAST_RUN":
+            assert nc["apply"] == 7
+        elif mode == "FAST_COMPILE":
+            assert nc["apply"] == 8
         assert nc["output"] == 1
 
     def test_ofg(self):