Add some playwright tests

Author: cpsievert

tests/playwright/shiny/inputs/input_selectize_update_options/app.py

@@ -0,0 +1,48 @@
+from shiny import reactive
+from shiny.express import input, render, ui
+
+ui.input_selectize(
+    "single",
+    "Single choice",
+    choices=["Option 1", "Option 2", "Option 3"],
+    multiple=False,
+)
+
+ui.input_selectize(
+    "multiple",
+    "Multiple choice",
+    choices=["Option 1", "Option 2", "Option 3"],
+    selected=["Option 1", "Option 2"],
+    multiple=True,
+)
+
+
+# Default plugins should be retained on options update
+@reactive.effect
+def _():
+    with reactive.isolate():
+        selected = input.single()
+    ui.update_selectize(
+        "single",
+        selected=selected,  # Workaround for https://github.com/rstudio/shiny/issues/4278
+        options={"placeholder": "Select an option"},
+    )
+
+
+# Default plugins should be retained on options update
+@reactive.effect
+def _():
+    ui.update_selectize(
+        "multiple",
+        options={"placeholder": "Select an option"},
+    )
+
+
+@render.code
+def single_out():
+    return input.single()
+
+
+@render.code
+def multiple_out():
+    return ", ".join(input.multiple())

tests/playwright/shiny/inputs/input_selectize_update_options/test_input_selectize_update_options.py

@@ -0,0 +1,48 @@
+from playwright.sync_api import Page, expect
+
+from shiny.playwright import controller
+from shiny.run import ShinyAppProc
+
+
+def test_input_selectize_update_options(page: Page, local_app: ShinyAppProc) -> None:
+    page.goto(local_app.url)
+
+    single = controller.InputSelectize(page, "single")
+    multiple = controller.InputSelectize(page, "multiple")
+
+    single_out = controller.OutputCode(page, "single_out")
+    multiple_out = controller.OutputCode(page, "multiple_out")
+
+    # Confirm starting state
+    single.expect_selected(["Option 1"])
+    multiple.expect_selected(["Option 1", "Option 2"])
+
+    def click_clear_button(x: controller.InputSelectize):
+        x.loc.locator("..").locator("> div.plugin-clear_button > a.clear").click()
+
+    # Can clear single selection via clear_button (after options have been updated)
+    click_clear_button(single)
+    single.expect_selected([""])
+    single_out.expect_value("")
+
+    # Can clear multiple selection via clear_button (after options have been updated)
+    click_clear_button(multiple)
+    multiple.expect_selected([])
+    multiple_out.expect_value("")
+
+    multiple.set(["Option 2", "Option 3"])
+
+    # Can remove individual options
+    def click_remove_button(x: controller.InputSelectize, option: str):
+        x.loc.locator(
+            f"+ div.plugin-remove_button > .has-options > .item[data-value='{option}'] > .remove:first-child"
+        ).click()
+        page.keyboard.press("Escape")
+
+    click_remove_button(multiple, "Option 2")
+    multiple.expect_selected(["Option 3"])
+    multiple_out.expect_value("Option 3")
+
+    click_remove_button(multiple, "Option 3")
+    multiple.expect_selected([])
+    multiple_out.expect_value("")