Introduce DeprecatedGlobal and show proper warnings (#1014)

* kill the PyScript class and the weird pyscript instance; from the user point of view its functionalities are still available as pyscript.*, but pyscript is not the module, not the instance of PyScript

* simplify the code in _set_version_info, while I'm at it

* start to implement DeprecatedGlobal

* DeprecatedGlobal.__getattr__

* don't show the same warning twice

* DeprecatedGlobal.__call__

* make it possible to specify a different warning message for every global

* WIP: carefully use DeprecatedGlobal to show reasonable warning messages depending on which name you are accessing to. More names to follow

* deprecate more names

* deprecate private names

* depreacte direct usage of console and document

* deprecate the PyScript class

* use a better error message

* fix test_pyscript.py

* introduce a __repr__ for DeprecatedGlobal

* add an helper to ensure that we don't show any error or warning on the page

* WIP: ensure that examples don't use depreacted features. Many tests are failing

* don't deprecate Element

* don't use the global micropip to install packages, else we trigger a warning

* use a better error message for micropip

* fix test_todo_pylist to avoid using deprecated globals

* fix test_webgl_raycaster

* fix tests

* make HTML globally available

* add MIME_RENDERERS and MIME_METHODS

* fix the typing of Micropip, thanks to @FabioRosado

examples/pylist.py

@@ -1,7 +1,9 @@
 from datetime import datetime as dt
 
+import pyscript
 
-class PyItem(PyItemTemplate):
+
+class PyItem(pyscript.PyItemTemplate):
     def on_click(self, evt=None):
         self.data["done"] = not self.data["done"]
         self.strike(self.data["done"])
@@ -9,7 +11,7 @@ class PyItem(PyItemTemplate):
         self.select("input").element.checked = self.data["done"]
 
 
-class PyList(PyListTemplate):
+class PyList(pyscript.PyListTemplate):
     item_class = PyItem
 
     def add(self, item):

examples/todo-pylist.html

@@ -124,16 +124,17 @@
         <p>pylist.py</p>
         <pre class="prism-code language-python">
           <code class="language-python">
+            import pyscript
             from datetime import datetime as dt
 
-            class PyItem(PyItemTemplate):
+            class PyItem(pyscript.PyItemTemplate):
                 def on_click(self, evt=None):
                     self.data["done"] = not self.data["done"]
                     self.strike(self.data["done"])
 
                     self.select("input").element.checked = self.data["done"]
 
-            class PyList(PyListTemplate):
+            class PyList(pyscript.PyListTemplate):
                 item_class = PyItem
 
                 def add(self, item):

examples/webgl/raycaster/index.html

@@ -31,6 +31,7 @@ from js import Math
 from js import THREE
 from js import performance
 from js import Object
+from js import document
 import asyncio
 
 

pyscriptjs/src/main.ts

@@ -210,22 +210,21 @@ export class PyScriptApp {
         //Refresh the module cache so Python consistently finds pyscript module
         runtime.invalidate_module_path_cache()
 
-        // inject `define_custom_element` it into the PyScript module scope
+        // inject `define_custom_element` and showWarning it into the PyScript
+        // module scope
         const pyscript_module = runtime.interpreter.pyimport('pyscript');
         pyscript_module.define_custom_element = define_custom_element;
-        pyscript_module.PyScript.set_version_info(version);
+        pyscript_module.showWarning = showWarning;
+        pyscript_module._set_version_info(version);
         pyscript_module.destroy();
 
-        // TODO: Currently adding the imports for backwards compatibility, we should
+        // import some carefully selected names into the global namespace
-        //       remove it
         await runtime.run(`
-        from pyscript import *
+        import js
-        `);
+        import pyscript
-        logger.warn(`DEPRECATION WARNING: 'micropip', 'Element', 'console', 'document' and several other \
+        from pyscript import Element, display, HTML
-objects form the pyscript module (with the exception of 'display') will be \
+        pyscript._install_deprecated_globals_2022_12_1(globals())
-be removed from the Python global namespace in the following release. \
+        `)
-To avoid errors in future releases use import from pyscript instead. For instance: \
-from pyscript import micropip, Element, console, document`);
 
         if (this.config.packages) {
             logger.info('Packages to install: ', this.config.packages);

pyscriptjs/src/pyexec.ts

@@ -6,15 +6,14 @@ import type { Runtime } from './runtime';
 const logger = getLogger('pyexec');
 
 export function pyExec(runtime: Runtime, pysrc: string, outElem: HTMLElement) {
-    // this is the python function defined in pyscript.py
+    //This is pyscript.py
-    const set_current_display_target = runtime.globals.get('set_current_display_target');
+    const pyscript_py = runtime.interpreter.pyimport('pyscript');
+
     ensureUniqueId(outElem);
-    set_current_display_target(outElem.id);
+    pyscript_py.set_current_display_target(outElem.id);
-    //This is the python function defined in pyscript.py
-    const usesTopLevelAwait = runtime.globals.get('uses_top_level_await');
     try {
         try {
-            if (usesTopLevelAwait(pysrc)) {
+            if (pyscript_py.uses_top_level_await(pysrc)) {
                 throw new UserError(
                     ErrorCode.TOP_LEVEL_AWAIT,
                     'The use of top-level "await", "async for", and ' +
@@ -33,7 +32,8 @@ export function pyExec(runtime: Runtime, pysrc: string, outElem: HTMLElement) {
             displayPyException(err, outElem);
         }
     } finally {
-        set_current_display_target(undefined);
+        pyscript_py.set_current_display_target(undefined);
+        pyscript_py.destroy();
     }
 }
 

pyscriptjs/src/pyodide.ts

@@ -10,7 +10,7 @@ declare const loadPyodide: typeof loadPyodideDeclaration;
 
 const logger = getLogger('pyscript/pyodide');
 
-interface Micropip {
+interface Micropip extends PyProxy {
     install: (packageName: string | string[]) => Promise<void>;
     destroy: () => void;
 }
@@ -91,7 +91,8 @@ export class PyodideRuntime extends Runtime {
     async installPackage(package_name: string | string[]): Promise<void> {
         if (package_name.length > 0) {
             logger.info(`micropip install ${package_name.toString()}`);
-            const micropip = this.globals.get('micropip') as Micropip;
+
+            const micropip = this.interpreter.pyimport('micropip') as Micropip;
             try {
                 await micropip.install(package_name);
                 micropip.destroy();

pyscriptjs/src/python/pyscript.py

@@ -8,8 +8,7 @@ import time
 from collections import namedtuple
 from textwrap import dedent
 
-import micropip  # noqa: F401
+import js
-from js import console, document
 
 try:
     from pyodide import create_proxy
@@ -68,6 +67,41 @@ MIME_RENDERERS = {
 }
 
 
+# these are set by _set_version_info
+__version__ = None
+version_info = None
+
+
+def _set_version_info(version_from_runtime: str):
+    """Sets the __version__ and version_info properties from provided JSON data
+    Args:
+        version_from_runtime (str): A "dotted" representation of the version:
+            YYYY.MM.m(m).releaselevel
+            Year, Month, and Minor should be integers; releaselevel can be any string
+    """
+    global __version__
+    global version_info
+
+    __version__ = version_from_runtime
+
+    version_parts = version_from_runtime.split(".")
+    year = int(version_parts[0])
+    month = int(version_parts[1])
+    minor = int(version_parts[2])
+    if len(version_parts) > 3:
+        releaselevel = version_parts[3]
+    else:
+        releaselevel = ""
+
+    VersionInfo = namedtuple("version_info", ("year", "month", "minor", "releaselevel"))
+    version_info = VersionInfo(year, month, minor, releaselevel)
+
+    # we ALSO set PyScript.__version__ and version_info for backwards
+    # compatibility. Should be killed eventually.
+    PyScript.__version__ = __version__
+    PyScript.version_info = version_info
+
+
 class HTML:
     """
     Wrap a string so that display() can render it as plain HTML
@@ -126,7 +160,7 @@ def format_mime(obj):
         break
     if output is None:
         if not_available:
-            console.warn(
+            js.console.warn(
                 f"Rendered object requested unavailable MIME renderers: {not_available}"
             )
         output = repr(output)
@@ -138,18 +172,16 @@ def format_mime(obj):
     return MIME_RENDERERS[mime_type](output, meta), mime_type
 
 
-class PyScript:
+@staticmethod
-    loop = loop
+def run_until_complete(f):
-
-    @staticmethod
-    def run_until_complete(f):
     _ = loop.run_until_complete(f)
 
-    @staticmethod
+
-    def write(element_id, value, append=False, exec_id=0):
+@staticmethod
+def write(element_id, value, append=False, exec_id=0):
     """Writes value to the element with id "element_id"""
     Element(element_id).write(value=value, append=append)
-        console.warn(
+    js.console.warn(
         dedent(
             """PyScript Deprecation Warning: PyScript.write is
     marked as deprecated and will be removed sometime soon. Please, use
@@ -157,39 +189,6 @@ class PyScript:
         )
     )
 
-    @classmethod
-    def set_version_info(cls, version_from_runtime: str):
-        """Sets the __version__ and version_info properties from provided JSON data
-        Args:
-            version_from_runtime (str): A "dotted" representation of the version:
-                YYYY.MM.m(m).releaselevel
-                Year, Month, and Minor should be integers; releaselevel can be any string
-        """
-
-        # __version__ is the same string from runtime.ts
-        cls.__version__ = version_from_runtime
-
-        # version_info is namedtuple: (year, month, minor, releaselevel)
-        version_parts = version_from_runtime.split(".")
-        version_dict = {
-            "year": int(version_parts[0]),
-            "month": int(version_parts[1]),
-            "minor": int(version_parts[2]),
-        }
-
-        # If the version only has three parts (e.g. 2022.09.1), let the releaselevel be ""
-        try:
-            version_dict["releaselevel"] = version_parts[3]
-        except IndexError:
-            version_dict["releaselevel"] = ""
-
-        # Format mimics sys.version_info
-        _VersionInfo = namedtuple("version_info", version_dict.keys())
-        cls.version_info = _VersionInfo(**version_dict)
-
-        # tidy up class namespace
-        del cls.set_version_info
-
 
 def set_current_display_target(target_id):
     get_current_display_target._id = target_id
@@ -231,7 +230,7 @@ class Element:
     def element(self):
         """Return the dom element"""
         if not self._element:
-            self._element = document.querySelector(f"#{self._id}")
+            self._element = js.document.querySelector(f"#{self._id}")
         return self._element
 
     @property
@@ -248,7 +247,7 @@ class Element:
             return
 
         if append:
-            child = document.createElement("div")
+            child = js.document.createElement("div")
             self.element.appendChild(child)
 
         if self.element.children:
@@ -257,7 +256,7 @@ class Element:
             out_element = self.element
 
         if mime_type in ("application/javascript", "text/html"):
-            script_element = document.createRange().createContextualFragment(html)
+            script_element = js.document.createRange().createContextualFragment(html)
             out_element.appendChild(script_element)
         else:
             out_element.innerHTML = html
@@ -278,7 +277,7 @@ class Element:
         if _el:
             return Element(_el.id, _el)
         else:
-            console.warn(f"WARNING: can't find element matching query {query}")
+            js.console.warn(f"WARNING: can't find element matching query {query}")
 
     def clone(self, new_id=None, to=None):
         if new_id is None:
@@ -318,7 +317,7 @@ def add_classes(element, class_list):
 
 
 def create(what, id_=None, classes=""):
-    element = document.createElement(what)
+    element = js.document.createElement(what)
     if id_:
         element.id = id_
     add_classes(element, classes)
@@ -432,7 +431,7 @@ class PyListTemplate:
             Element(new_id).element.onclick = foo
 
     def connect(self):
-        self.md = main_div = document.createElement("div")
+        self.md = main_div = js.document.createElement("div")
         main_div.id = self._id + "-list-tasks-container"
 
         if self.theme:
@@ -502,7 +501,7 @@ class Plugin:
 
     def register_custom_element(self, tag):
         # TODO: Ideally would be better to use the logger.
-        console.info(f"Defining new custom element {tag}")
+        js.console.info(f"Defining new custom element {tag}")
 
         def wrapper(class_):
             # TODO: this is very pyodide specific but will have to do
@@ -512,4 +511,158 @@ class Plugin:
         return create_proxy(wrapper)
 
 
-pyscript = PyScript()
+class DeprecatedGlobal:
+    """
+    Proxy for globals which are deprecated.
+
+    The intendend usage is as follows:
+
+        # in the global namespace
+        Element = pyscript.DeprecatedGlobal('Element', pyscript.Element, "...")
+        console = pyscript.DeprecatedGlobal('console', js.console, "...")
+        ...
+
+    The proxy forwards __getattr__ and __call__ to the underlying object, and
+    emit a warning on the first usage.
+
+    This way users see a warning only if they actually access the top-level
+    name.
+    """
+
+    def __init__(self, name, obj, message):
+        self.__name = name
+        self.__obj = obj
+        self.__message = message
+        self.__warning_already_shown = False
+
+    def __repr__(self):
+        return f"<DeprecatedGlobal({self.__name!r})>"
+
+    def _show_warning(self, message):
+        """
+        NOTE: this is overridden by unit tests
+        """
+        # this showWarning is implemented in js and injected into this
+        # namespace by main.ts
+        showWarning(message, "html")  # noqa: F821
+
+    def _show_warning_maybe(self):
+        if self.__warning_already_shown:
+            return
+        self._show_warning(self.__message)
+        self.__warning_already_shown = True
+
+    def __getattr__(self, attr):
+        self._show_warning_maybe()
+        return getattr(self.__obj, attr)
+
+    def __call__(self, *args, **kwargs):
+        self._show_warning_maybe()
+        return self.__obj(*args, **kwargs)
+
+    def __iter__(self):
+        self._show_warning_maybe()
+        return iter(self.__obj)
+
+    def __getitem__(self, key):
+        self._show_warning_maybe()
+        return self.__obj[key]
+
+    def __setitem__(self, key, value):
+        self._show_warning_maybe()
+        self.__obj[key] = value
+
+
+class PyScript:
+    """
+    This class is deprecated since 2022.12.1.
+
+    All its old functionalities are available as module-level functions. This
+    class should be killed eventually.
+    """
+
+    loop = loop
+
+    @staticmethod
+    def run_until_complete(f):
+        run_until_complete(f)
+
+    @staticmethod
+    def write(element_id, value, append=False, exec_id=0):
+        write(element_id, value, append, exec_id)
+
+
+def _install_deprecated_globals_2022_12_1(ns):
+    """
+    Install into the given namespace all the globals which have been
+    deprecated since the 2022.12.1 release. Eventually they should be killed.
+    """
+
+    def deprecate(name, obj, instead):
+        message = f"Direct usage of <code>{name}</code> is deprecated. " + instead
+        ns[name] = DeprecatedGlobal(name, obj, message)
+
+    # function/classes defined in pyscript.py ===> pyscript.XXX
+    pyscript_names = [
+        "PyItemTemplate",
+        "PyListTemplate",
+        "PyWidgetTheme",
+        "add_classes",
+        "create",
+        "loop",
+    ]
+    for name in pyscript_names:
+        deprecate(
+            name, globals()[name], f"Please use <code>pyscript.{name}</code> instead."
+        )
+
+    # stdlib modules ===> import XXX
+    stdlib_names = [
+        "asyncio",
+        "base64",
+        "io",
+        "sys",
+        "time",
+        "datetime",
+        "pyodide",
+        "micropip",
+    ]
+    for name in stdlib_names:
+        obj = __import__(name)
+        deprecate(name, obj, f"Please use <code>import {name}</code> instead.")
+
+    # special case
+    deprecate(
+        "dedent", dedent, "Please use <code>from textwrap import dedent</code> instead."
+    )
+
+    # these are names that used to leak in the globals but they are just
+    # implementation details. People should not use them.
+    private_names = [
+        "eval_formatter",
+        "format_mime",
+        "identity",
+        "render_image",
+        "MIME_RENDERERS",
+        "MIME_METHODS",
+    ]
+    for name in private_names:
+        obj = globals()[name]
+        message = (
+            f"<code>{name}</code> is deprecated. "
+            "This is a private implementation detail of pyscript. "
+            "You should not use it."
+        )
+        ns[name] = DeprecatedGlobal(name, obj, message)
+
+    # these names are available as js.XXX
+    for name in ["document", "console"]:
+        obj = getattr(js, name)
+        deprecate(name, obj, f"Please use <code>js.{name}</code> instead.")
+
+    # PyScript is special, use a different message
+    message = (
+        "The <code>PyScript</code> object is deprecated. "
+        "Please use <code>pyscript</code> instead."
+    )
+    ns["PyScript"] = DeprecatedGlobal("PyScript", PyScript, message)

pyscriptjs/tests/integration/support.py

@@ -292,6 +292,17 @@ class PyScriptTest:
         elems = [loc.nth(i) for i in range(n)]
         return iter(elems)
 
+    def assert_no_banners(self):
+        """
+        Ensure that there are no alert banners on the page, which are used for
+        errors and warnings. Raise AssertionError if any if found.
+        """
+        loc = self.page.locator(".alert-banner")
+        n = loc.count()
+        if n > 0:
+            text = "\n".join(loc.all_inner_texts())
+            raise AssertionError(f"Found {n} alert banners:\n" + text)
+
 
 # ============== Helpers and utility functions ==============
 

pyscriptjs/tests/integration/test_01_basic.py

@@ -214,8 +214,8 @@ class TestBasic(PyScriptTest):
             """
         <py-script>
             import js
-            js.console.log(PyScript.__version__)
+            js.console.log(pyscript.__version__)
-            js.console.log(str(PyScript.version_info))
+            js.console.log(str(pyscript.version_info))
         </py-script>
         """
         )
@@ -232,27 +232,47 @@ class TestBasic(PyScriptTest):
             is not None
         )
 
-    def test_python_modules_deprecated(self):
+    def test_assert_no_banners(self):
-        # GIVEN a py-script tag
+        """
+        Test that the DOM doesn't contain error/warning banners
+        """
         self.pyscript_run(
             """
             <py-script>
-                print('hello pyscript')
+                import pyscript
-                raise Exception('this is an error')
+                pyscript.showWarning("hello")
+                pyscript.showWarning("world")
             </py-script>
             """
         )
-        # TODO: Adding a quick check that the deprecation warning is logged. Not spending
+        with pytest.raises(AssertionError, match="Found 2 alert banners"):
-        #       to much time to make it perfect since we'll remove this right after the
+            self.assert_no_banners()
-        #       release. (Anyone wanting to improve it, please feel free to)
+
-        warning_msg = (
+    def test_deprecated_globals(self):
-            "[pyscript/main] DEPRECATION WARNING: 'micropip', 'Element', 'console', 'document' "
+        self.pyscript_run(
-            "and several other objects form the pyscript module (with the exception of 'display') "
+            """
-            "will be be removed from the Python global namespace in the following release. "
+            <py-script>
-            "To avoid errors in future releases use import from pyscript "
+                # trigger various warnings
-            "instead. For instance: from pyscript import micropip, Element, "
+                create("div", classes="a b c")
-            "console, document"
+                assert sys.__name__ == 'sys'
+                dedent("")
+                format_mime("")
+                assert MIME_RENDERERS['text/html'] is not None
+                console.log("hello")
+                PyScript.loop
+            </py-script>
+
+            <div id="mydiv"></div>
+            """
         )
-        # we EXPECTED to find a deprecation warning about what will be removed from the Python
+        banner = self.page.locator(".py-warning")
-        # global namespace in the next releases
+        messages = banner.all_inner_texts()
-        assert warning_msg in self.console.warning.lines
+        assert messages == [
+            "The PyScript object is deprecated. Please use pyscript instead.",
+            "Direct usage of console is deprecated. Please use js.console instead.",
+            "MIME_RENDERERS is deprecated. This is a private implementation detail of pyscript. You should not use it.",  # noqa: E501
+            "format_mime is deprecated. This is a private implementation detail of pyscript. You should not use it.",  # noqa: E501
+            "Direct usage of dedent is deprecated. Please use from textwrap import dedent instead.",
+            "Direct usage of sys is deprecated. Please use import sys instead.",
+            "Direct usage of create is deprecated. Please use pyscript.create instead.",
+        ]

pyscriptjs/tests/integration/test_plugins.py

@@ -2,7 +2,8 @@ from .support import PyScriptTest
 
 # Source code of a simple plugin that creates a Custom Element for testing purposes
 CE_PLUGIN_CODE = """
-from pyscript import Plugin, console
+from pyscript import Plugin
+from js import console
 
 plugin = Plugin('py-upper')
 
@@ -20,7 +21,8 @@ class Upper:
 
 # Source of a plugin hooks into the PyScript App lifecycle events
 HOOKS_PLUGIN_CODE = """
-from pyscript import Plugin, console
+from pyscript import Plugin
+from js import console
 
 class TestLogger(Plugin):
     def configure(self, config):
@@ -44,7 +46,8 @@ plugin = TestLogger()
 
 # Source of a script that doesn't call define a `plugin` attribute
 NO_PLUGIN_CODE = """
-from pyscript import Plugin, console
+from pyscript import Plugin
+from js import console
 
 class TestLogger(Plugin):
     pass
@@ -52,7 +55,8 @@ class TestLogger(Plugin):
 
 # Source code of a simple plugin that creates a Custom Element for testing purposes
 CODE_CE_PLUGIN_BAD_RETURNS = """
-from pyscript import Plugin, console
+from pyscript import Plugin
+from js import console
 
 plugin = Plugin('py-broken')
 

pyscriptjs/tests/integration/test_zz_examples.py

@@ -60,6 +60,7 @@ class TestExamples(PyScriptTest):
         content = self.page.content()
         pattern = "\\d+/\\d+/\\d+, \\d+:\\d+:\\d+"  # e.g. 08/09/2022 15:57:32
         assert re.search(pattern, content)
+        self.assert_no_banners()
 
     def test_simple_clock(self):
         self.goto("examples/simple_clock.html")
@@ -77,6 +78,7 @@ class TestExamples(PyScriptTest):
                 time.sleep(1)
         else:
             assert False, "Espresso time not found :("
+        self.assert_no_banners()
 
     def test_altair(self):
         self.goto("examples/altair.html")
@@ -94,6 +96,7 @@ class TestExamples(PyScriptTest):
         # Let's confirm that the links are visible now after clicking the menu
         assert save_as_png_link.is_visible()
         assert see_source_link.is_visible()
+        self.assert_no_banners()
 
     def test_bokeh(self):
         # XXX improve this test
@@ -101,6 +104,7 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "Bokeh Example"
         wait_for_render(self.page, "*", '<div.*class=\\"bk\\".*>')
+        self.assert_no_banners()
 
     def test_bokeh_interactive(self):
         # XXX improve this test
@@ -108,6 +112,7 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "Bokeh Example"
         wait_for_render(self.page, "*", '<div.*?class=\\"bk\\".*?>')
+        self.assert_no_banners()
 
     @pytest.mark.skip("flaky, see issue 759")
     def test_d3(self):
@@ -123,6 +128,7 @@ class TestExamples(PyScriptTest):
         # Let's simply assert that the text of the chart is as expected which
         # means that the chart rendered successfully and with the right text
         assert "🍊21\n🍇13\n🍏8\n🍌5\n🍐3\n🍋2\n🍎1\n🍉1" in pyscript_chart.inner_text()
+        self.assert_no_banners()
 
     def test_folium(self):
         self.goto("examples/folium.html")
@@ -145,6 +151,7 @@ class TestExamples(PyScriptTest):
         zoom_out = iframe.locator("[aria-label='Zoom out']")
         assert "−" in zoom_out.inner_text()
         zoom_out.click()
+        self.assert_no_banners()
 
     def test_matplotlib(self):
         self.goto("examples/matplotlib.html")
@@ -171,6 +178,7 @@ class TestExamples(PyScriptTest):
         # let's confirm that they are the same
         deviation = np.mean(np.abs(img_data - ref_data))
         assert deviation == 0.0
+        self.assert_no_banners()
 
     def test_numpy_canvas_fractals(self):
         self.goto("examples/numpy_canvas_fractals.html")
@@ -217,6 +225,7 @@ class TestExamples(PyScriptTest):
         assert self.console.log.lines[-2] == "Computing Newton set ..."
         # Confirm that changing the input values, triggered a new computation
         assert self.console.log.lines[-1] == "Computing Newton set ..."
+        self.assert_no_banners()
 
     def test_panel(self):
         self.goto("examples/panel.html")
@@ -234,6 +243,7 @@ class TestExamples(PyScriptTest):
 
         # Let's confirm that slider title changed
         assert slider_title.inner_text() == "Amplitude: 5"
+        self.assert_no_banners()
 
     def test_panel_deckgl(self):
         # XXX improve this test
@@ -241,6 +251,7 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "PyScript/Panel DeckGL Demo"
         wait_for_render(self.page, "*", "<div.*?class=['\"]bk-root['\"].*?>")
+        self.assert_no_banners()
 
     def test_panel_kmeans(self):
         # XXX improve this test
@@ -248,6 +259,7 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "Pyscript/Panel KMeans Demo"
         wait_for_render(self.page, "*", "<div.*?class=['\"]bk-root['\"].*?>")
+        self.assert_no_banners()
 
     def test_panel_stream(self):
         # XXX improve this test
@@ -255,6 +267,7 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "PyScript/Panel Streaming Demo"
         wait_for_render(self.page, "*", "<div.*?class=['\"]bk-root['\"].*?>")
+        self.assert_no_banners()
 
     def test_repl(self):
         self.goto("examples/repl.html")
@@ -274,6 +287,7 @@ class TestExamples(PyScriptTest):
         # before looking into the text_content
         assert self.page.wait_for_selector("#my-repl-2-2", state="attached")
         assert self.page.locator("#my-repl-2-2").text_content() == "4"
+        self.assert_no_banners()
 
     def test_repl2(self):
         self.goto("examples/repl2.html")
@@ -289,6 +303,7 @@ class TestExamples(PyScriptTest):
         content = self.page.content()
         pattern = "\\d+/\\d+/\\d+, \\d+:\\d+:\\d+"  # e.g. 08/09/2022 15:57:32
         assert re.search(pattern, content)
+        self.assert_no_banners()
 
     def test_todo(self):
         self.goto("examples/todo.html")
@@ -316,6 +331,7 @@ class TestExamples(PyScriptTest):
             '<p class="m-0 inline line-through">Fold laundry</p>'
             in first_task.inner_html()
         )
+        self.assert_no_banners()
 
     def test_todo_pylist(self):
         # XXX improve this test
@@ -323,6 +339,7 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "Todo App"
         wait_for_render(self.page, "*", "<input.*?id=['\"]new-task-content['\"].*?>")
+        self.assert_no_banners()
 
     @pytest.mark.xfail(reason="To be moved to collective and updated, see issue #686")
     def test_toga_freedom(self):
@@ -340,6 +357,7 @@ class TestExamples(PyScriptTest):
         self.page.locator("button#toga_calculate").click()
         result = self.page.locator("#toga_c_input")
         assert "40.555" in result.input_value()
+        self.assert_no_banners()
 
     def test_webgl_raycaster_index(self):
         # XXX improve this test
@@ -347,3 +365,4 @@ class TestExamples(PyScriptTest):
         self.wait_for_pyscript()
         assert self.page.title() == "Raycaster"
         wait_for_render(self.page, "*", "<canvas.*?>")
+        self.assert_no_banners()

pyscriptjs/tests/py-unit/test_pyscript.py

@@ -12,15 +12,16 @@ class TestElement:
 
     def test_element(self, monkeypatch):
         el = pyscript.Element("something")
-        document_mock = Mock()
+        js_mock = Mock()
+        js_mock.document = Mock()
         call_result = "some_result"
-        document_mock.querySelector = Mock(return_value=call_result)
+        js_mock.document.querySelector = Mock(return_value=call_result)
-        monkeypatch.setattr(pyscript, "document", document_mock)
+        monkeypatch.setattr(pyscript, "js", js_mock)
         assert not el._element
         real_element = el.element
         assert real_element
-        assert pyscript.document.querySelector.call_count == 1
+        assert js_mock.document.querySelector.call_count == 1
-        pyscript.document.querySelector.assert_called_with("#something")
+        js_mock.document.querySelector.assert_called_with("#something")
         assert real_element == call_result
 
 
@@ -121,6 +122,86 @@ def test_uses_top_level_await():
 
 def test_set_version_info():
     version_string = "1234.56.78.ABCD"
-    pyscript.PyScript.set_version_info(version_string)
+    pyscript._set_version_info(version_string)
-    assert pyscript.PyScript.__version__ == version_string
+    assert pyscript.__version__ == version_string
-    assert pyscript.PyScript.version_info == (1234, 56, 78, "ABCD")
+    assert pyscript.version_info == (1234, 56, 78, "ABCD")
+    #
+    # for backwards compatibility, should be killed eventually
+    assert pyscript.PyScript.__version__ == pyscript.__version__
+    assert pyscript.PyScript.version_info == pyscript.version_info
+
+
+class MyDeprecatedGlobal(pyscript.DeprecatedGlobal):
+    """
+    A subclass of DeprecatedGlobal, for tests.
+
+    Instead of showing warnings into the DOM (which we don't have inside unit
+    tests), we record the warnings into a field.
+    """
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.warnings = []
+
+    def _show_warning(self, message):
+        self.warnings.append(message)
+
+
+class TestDeprecatedGlobal:
+    def test_repr(self):
+        glob = MyDeprecatedGlobal("foo", None, "my message")
+        assert repr(glob) == "<DeprecatedGlobal('foo')>"
+
+    def test_show_warning_override(self):
+        """
+        Test that our overriding of _show_warning actually works.
+        """
+        glob = MyDeprecatedGlobal("foo", None, "my message")
+        glob._show_warning("foo")
+        glob._show_warning("bar")
+        assert glob.warnings == ["foo", "bar"]
+
+    def test_getattr(self):
+        class MyFakeObject:
+            name = "FooBar"
+
+        glob = MyDeprecatedGlobal("MyFakeObject", MyFakeObject, "this is my warning")
+        assert glob.name == "FooBar"
+        assert glob.warnings == ["this is my warning"]
+
+    def test_dont_show_warning_twice(self):
+        class MyFakeObject:
+            name = "foo"
+            surname = "bar"
+
+        glob = MyDeprecatedGlobal("MyFakeObject", MyFakeObject, "this is my warning")
+        assert glob.name == "foo"
+        assert glob.surname == "bar"
+        assert len(glob.warnings) == 1
+
+    def test_call(self):
+        def foo(x, y):
+            return x + y
+
+        glob = MyDeprecatedGlobal("foo", foo, "this is my warning")
+        assert glob(1, y=2) == 3
+        assert glob.warnings == ["this is my warning"]
+
+    def test_iter(self):
+        d = {"a": 1, "b": 2, "c": 3}
+        glob = MyDeprecatedGlobal("d", d, "this is my warning")
+        assert list(glob) == ["a", "b", "c"]
+        assert glob.warnings == ["this is my warning"]
+
+    def test_getitem(self):
+        d = {"a": 1, "b": 2, "c": 3}
+        glob = MyDeprecatedGlobal("d", d, "this is my warning")
+        assert glob["a"] == 1
+        assert glob.warnings == ["this is my warning"]
+
+    def test_setitem(self):
+        d = {"a": 1, "b": 2, "c": 3}
+        glob = MyDeprecatedGlobal("d", d, "this is my warning")
+        glob["a"] = 100
+        assert glob.warnings == ["this is my warning"]
+        assert glob["a"] == 100