Add a playwright test

Author: cpsievert

tests/playwright/shiny/session/clientdata/app.py

@@ -0,0 +1,31 @@
+import matplotlib.pyplot as plt
+import numpy as np
+
+from shiny import App, Inputs, Outputs, Session, render, ui
+
+app_ui = ui.page_sidebar(
+    ui.sidebar(
+        ui.input_slider("obs", "Number of observations:", min=0, max=1000, value=500),
+        open="closed",
+    ),
+    ui.h3("clientData values"),
+    ui.output_text_verbatim("clientdatatext"),
+    ui.output_plot("myplot"),
+    title="Shiny Client Data",
+)
+
+
+def server(input: Inputs, output: Outputs, session: Session):
+    @render.text
+    def clientdatatext():
+        cdata = session.clientdata
+        return "\n".join([f"{name} = {cdata[name]()}" for name in reversed(dir(cdata))])
+
+    @render.plot
+    def myplot():
+        plt.figure()
+        plt.hist(np.random.normal(size=input.obs()))
+        plt.title("This is myplot")
+
+
+app = App(app_ui, server)

tests/playwright/shiny/session/clientdata/test_clientdata.py

@@ -0,0 +1,25 @@
+import re
+
+from playwright.sync_api import Page
+
+from shiny.playwright import controller
+from shiny.run import ShinyAppProc
+
+
+def test_output_image_kitchen(page: Page, local_app: ShinyAppProc) -> None:
+
+    page.goto(local_app.url)
+
+    text = controller.OutputTextVerbatim(page, "clientdatatext")
+
+    # This doesn't cover all the clientdata values since some of them
+    # are environment-dependent. However, this at least checks that the
+    # clientdata object is available and that some values are present.
+    text.expect.to_contain_text("url_protocol = http")
+    text.expect.to_contain_text("url_pathname = /")
+    text.expect.to_contain_text(
+        re.compile("url_hostname = (localhost|127\\.0\\.0\\.1)")
+    )
+    text.expect.to_contain_text("output_myplot_hidden = False")
+    text.expect.to_contain_text("output_myplot_bg = rgb(255, 255, 255)")
+    text.expect.to_contain_text("output_clientdatatext_hidden = False")