Test clipboard to respond to new content directly

Author: Lxstr

components/dash-core-components/tests/integration/clipboard/test_clipboard.py

@@ -1,4 +1,4 @@
-from dash import Dash, html, dcc
+from dash import Dash, html, dcc, callback, Output, Input
 
 import dash.testing.wait as wait
 import time
@@ -54,3 +54,32 @@ def test_clp002_clipboard_text(dash_dcc_headed):
         == copy_text,
         timeout=3,
     )
+
+def test_clp003_clipboard_text(dash_dcc_headed):
+    copy_text = "Copy this text to the clipboard using a separate button"
+    app = Dash(__name__, prevent_initial_callbacks=True)
+    app.layout = html.Div(
+        [dcc.Clipboard(id="copy_icon", content=copy_text), dcc.Textarea(id="paste"), html.Button("Copy", id="copy_button")]
+    )
+    @callback(
+        Output("copy_icon", "content"),
+        Input("copy_button", "n_clicks"),
+        prevent_initial_call=True,
+    )
+    def selected(clicks):
+        return f"{clicks}"
+    
+    dash_dcc_headed.start_server(app)
+
+    dash_dcc_headed.find_element("#copy_button").click()
+    time.sleep(1)
+    dash_dcc_headed.find_element("#paste").click()
+    ActionChains(dash_dcc_headed.driver).key_down(Keys.CONTROL).send_keys("v").key_up(
+        Keys.CONTROL
+    ).perform()
+
+    wait.until(
+        lambda: dash_dcc_headed.find_element("#paste").get_attribute("value")
+        == copy_text,
+        timeout=3,
+    )