Uploaded Test files

venv/Lib/site-packages/notebook/tests/selenium/test_dualmode_insertcell.py

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+from selenium.webdriver.common.keys import Keys
+from .utils import shift
+
+INITIAL_CELLS = ['print("a")', 'print("b")', 'print("c")']
+
+def test_insert_cell(prefill_notebook):
+    notebook = prefill_notebook(INITIAL_CELLS)
+
+    notebook.to_command_mode()
+    notebook.focus_cell(2)
+    notebook.convert_cell_type(2, "markdown")
+    
+    # insert code cell above
+    notebook.current_cell.send_keys("a")
+    assert notebook.get_cell_contents(2) == ""
+    assert notebook.get_cell_type(2) == "code"
+    assert len(notebook.cells) == 4
+    
+    # insert code cell below
+    notebook.current_cell.send_keys("b")
+    assert notebook.get_cell_contents(2) == ""
+    assert notebook.get_cell_contents(3) == ""
+    assert notebook.get_cell_type(3) == "code"
+    assert len(notebook.cells) == 5
+
+    notebook.edit_cell(index=1, content="cell1")
+    notebook.focus_cell(1)
+    notebook.current_cell.send_keys("a")
+    assert notebook.get_cell_contents(1) == ""
+    assert notebook.get_cell_contents(2) == "cell1"
+
+    notebook.edit_cell(index=1, content='cell1')
+    notebook.edit_cell(index=2, content='cell2')
+    notebook.edit_cell(index=3, content='cell3')
+    notebook.focus_cell(2)
+    notebook.current_cell.send_keys("b")
+    assert notebook.get_cell_contents(1) == "cell1"
+    assert notebook.get_cell_contents(2) == "cell2"
+    assert notebook.get_cell_contents(3) == ""
+    assert notebook.get_cell_contents(4) == "cell3"
+
+    # insert above multiple selected cells
+    notebook.focus_cell(1)
+    shift(notebook.browser, Keys.DOWN)
+    notebook.current_cell.send_keys('a')
+    
+    # insert below multiple selected cells
+    notebook.focus_cell(2)
+    shift(notebook.browser, Keys.DOWN)
+    notebook.current_cell.send_keys('b')
+    assert notebook.get_cells_contents()[1:5] == ["", "cell1", "cell2", ""]