Add back missing `DEPOT_PATH` setting within Julia

test/test_env.py

@@ -14,20 +14,29 @@ class TestJuliaProject(unittest.TestCase):
         with TemporaryDirectory() as tmpdir:
             # Create a temp depot to store julia packages (and our custom env)
             Main = julia_helpers.init_julia()
+
+            # Set up env:
             if "JULIA_DEPOT_PATH" not in os.environ:
                 old_env = None
                 os.environ["JULIA_DEPOT_PATH"] = tmpdir
             else:
                 old_env = os.environ["JULIA_DEPOT_PATH"]
                 os.environ["JULIA_DEPOT_PATH"] = f"{tmpdir}:{os.environ['JULIA_DEPOT_PATH']}"
+            Main.eval(f'pushfirst!(DEPOT_PATH, "{julia_helpers._escape_filename(tmpdir)}")')
             test_env_name = "@pysr_test_env"
             julia_helpers.install(julia_project=test_env_name)
             Main = julia_helpers.init_julia(julia_project=test_env_name)
+
+            # Try to use env:
             Main.eval("using SymbolicRegression")
             Main.eval("using Pkg")
+            
+            # Assert we actually loaded it:
             cur_project_dir = Main.eval("splitdir(dirname(Base.active_project()))[1]")
             potential_shared_project_dirs = Main.eval("Pkg.envdir(DEPOT_PATH[1])")
             self.assertEqual(cur_project_dir, potential_shared_project_dirs)
+
+            # Clean up:
             Main.eval("pop!(DEPOT_PATH)")
             if old_env is None:
                 del os.environ["JULIA_DEPOT_PATH"]