Re-enable CI tests (#1760)

This re-enables CI tests on every PR 🎉.
This uses make test-integration, which runs tests sequentially.

In theory, we also have test-integration-parallel but it seems to be very flaky: many tests randomly timeout. I didn't spend too much time investigating this, it's probably worth its own investigation in a separate PR, but for now it's important to re-enable CI tests, even if they are a bit slower.

pyscript.core/tests/integration/test_01_basic.py

@@ -11,26 +11,22 @@ class TestBasic(PyScriptTest):
             """
             <script type="py">
                 import js
-                js.console.log('1. hello from script py')
+                js.console.log('hello from script py')
             </script>
+            """
+        )
+        assert self.console.log.lines == ["hello from script py"]
 
+    def test_py_script_hello(self):
+        self.pyscript_run(
+            """
             <py-script>
                 import js
-                js.console.log('2. hello from py-script')
+                js.console.log('hello from py-script')
             </py-script>
             """
         )
-        if self.execution_thread == "main":
-            # in main, the order of execution is guaranteed
-            assert self.console.log.lines == [
-                "1. hello from script py",
-                "2. hello from py-script",
-            ]
-        else:
-            # in workers, each tag is executed by its own worker, so they can
-            # come out of order
-            lines = sorted(self.console.log.lines)
-            assert lines == ["1. hello from script py", "2. hello from py-script"]
+        assert self.console.log.lines == ["hello from py-script"]
 
     def test_execution_thread(self):
         self.pyscript_run(
@@ -47,20 +43,25 @@ class TestBasic(PyScriptTest):
         in_worker = str(in_worker).lower()
         assert self.console.log.lines[-1] == f"worker? {in_worker}"
 
-    # TODO: if there's no py-script there are surely no plugins neither
-    #       this test must be discussed or rewritten to make sense now
-    @pytest.mark.skip(reason="NEXT: No banner and should also add a WARNING about CORS")
+    @skip_worker('NEXT: it should show a nice error on the page')
     def test_no_cors_headers(self):
         self.disable_cors_headers()
         self.pyscript_run(
             """
-            <!-- we don't really need anything here, we just want to check that
-                 pyscript starts -->
+            <script type="py">
+                import js
+                js.console.log("hello")
+            </script>
             """,
             wait_for_pyscript=False,
         )
         assert self.headers == {}
-        if self.execution_thread == "worker":
+        if self.execution_thread == "main":
+            self.wait_for_pyscript()
+            assert self.console.log.lines == ['hello']
+            self.assert_no_banners()
+        else:
+            # XXX adapt and fix the test
             expected_alert_banner_msg = (
                 '(PY1000): When execution_thread is "worker", the site must be cross origin '
                 "isolated, but crossOriginIsolated is false. To be cross origin isolated, "
@@ -71,8 +72,7 @@ class TestBasic(PyScriptTest):
             )
             alert_banner = self.page.wait_for_selector(".alert-banner")
             assert expected_alert_banner_msg in alert_banner.inner_text()
-        else:
-            self.assert_no_banners()
+
 
     def test_print(self):
         self.pyscript_run(