Handle non-200 code when fetch py-script src (#940)

pyscriptjs/tests/integration/test_01_basic.py

@@ -1,4 +1,6 @@
-from .support import PyScriptTest
+import pytest
+
+from .support import JsErrors, PyScriptTest
 
 
 class TestBasic(PyScriptTest):
@@ -126,3 +128,22 @@ class TestBasic(PyScriptTest):
             self.PY_COMPLETE,
             "hello from foo",
         ]
+
+    def test_py_script_src_not_found(self):
+        self.pyscript_run(
+            """
+            <py-script src="foo.py"></py-script>
+            """
+        )
+        assert self.console.log.lines == [
+            self.PY_COMPLETE,
+        ]
+        assert "Failed to load resource" in self.console.error.lines[0]
+        with pytest.raises(JsErrors) as exc:
+            self.check_js_errors()
+
+        error_msg = str(exc.value)
+        assert "Failed to fetch" in error_msg
+
+        pyscript_tag = self.page.locator("py-script")
+        assert pyscript_tag.inner_html() == ""