From 4f1a3b5f9ad05aa7b08715d48909a2b06ee2fcb1 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 15 Apr 2024 18:35:31 +0200
Subject: Adding upstream version 3.0.43.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/test_cli.py | 941 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 941 insertions(+)
 create mode 100644 tests/test_cli.py

(limited to 'tests/test_cli.py')

diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..3a16e9f
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,941 @@
+"""
+These are almost end-to-end tests. They create a Prompt, feed it with some
+input and check the result.
+"""
+from __future__ import annotations
+
+from functools import partial
+
+import pytest
+
+from prompt_toolkit.clipboard import ClipboardData, InMemoryClipboard
+from prompt_toolkit.enums import EditingMode
+from prompt_toolkit.filters import ViInsertMode
+from prompt_toolkit.history import InMemoryHistory
+from prompt_toolkit.input.defaults import create_pipe_input
+from prompt_toolkit.input.vt100_parser import ANSI_SEQUENCES
+from prompt_toolkit.key_binding.bindings.named_commands import prefix_meta
+from prompt_toolkit.key_binding.key_bindings import KeyBindings
+from prompt_toolkit.output import DummyOutput
+from prompt_toolkit.shortcuts import PromptSession
+
+
+def _history():
+    h = InMemoryHistory()
+    h.append_string("line1 first input")
+    h.append_string("line2 second input")
+    h.append_string("line3 third input")
+    return h
+
+
+def _feed_cli_with_input(
+    text,
+    editing_mode=EditingMode.EMACS,
+    clipboard=None,
+    history=None,
+    multiline=False,
+    check_line_ending=True,
+    key_bindings=None,
+):
+    """
+    Create a Prompt, feed it with the given user input and return the CLI
+    object.
+
+    This returns a (result, Application) tuple.
+    """
+    # If the given text doesn't end with a newline, the interface won't finish.
+    if check_line_ending:
+        assert text.endswith("\r")
+
+    with create_pipe_input() as inp:
+        inp.send_text(text)
+        session = PromptSession(
+            input=inp,
+            output=DummyOutput(),
+            editing_mode=editing_mode,
+            history=history,
+            multiline=multiline,
+            clipboard=clipboard,
+            key_bindings=key_bindings,
+        )
+
+        _ = session.prompt()
+        return session.default_buffer.document, session.app
+
+
+def test_simple_text_input():
+    # Simple text input, followed by enter.
+    result, cli = _feed_cli_with_input("hello\r")
+    assert result.text == "hello"
+    assert cli.current_buffer.text == "hello"
+
+
+def test_emacs_cursor_movements():
+    """
+    Test cursor movements with Emacs key bindings.
+    """
+    # ControlA (beginning-of-line)
+    result, cli = _feed_cli_with_input("hello\x01X\r")
+    assert result.text == "Xhello"
+
+    # ControlE (end-of-line)
+    result, cli = _feed_cli_with_input("hello\x01X\x05Y\r")
+    assert result.text == "XhelloY"
+
+    # ControlH or \b
+    result, cli = _feed_cli_with_input("hello\x08X\r")
+    assert result.text == "hellX"
+
+    # Delete.  (Left, left, delete)
+    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x1b[3~\r")
+    assert result.text == "helo"
+
+    # Left.
+    result, cli = _feed_cli_with_input("hello\x1b[DX\r")
+    assert result.text == "hellXo"
+
+    # ControlA, right
+    result, cli = _feed_cli_with_input("hello\x01\x1b[CX\r")
+    assert result.text == "hXello"
+
+    # ControlB (backward-char)
+    result, cli = _feed_cli_with_input("hello\x02X\r")
+    assert result.text == "hellXo"
+
+    # ControlF (forward-char)
+    result, cli = _feed_cli_with_input("hello\x01\x06X\r")
+    assert result.text == "hXello"
+
+    # ControlD: delete after cursor.
+    result, cli = _feed_cli_with_input("hello\x01\x04\r")
+    assert result.text == "ello"
+
+    # ControlD at the end of the input ssshould not do anything.
+    result, cli = _feed_cli_with_input("hello\x04\r")
+    assert result.text == "hello"
+
+    # Left, Left, ControlK  (kill-line)
+    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x0b\r")
+    assert result.text == "hel"
+
+    # Left, Left Esc- ControlK (kill-line, but negative)
+    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x1b-\x0b\r")
+    assert result.text == "lo"
+
+    # ControlL: should not influence the result.
+    result, cli = _feed_cli_with_input("hello\x0c\r")
+    assert result.text == "hello"
+
+    # ControlRight (forward-word)
+    result, cli = _feed_cli_with_input("hello world\x01X\x1b[1;5CY\r")
+    assert result.text == "XhelloY world"
+
+    # ContrlolLeft (backward-word)
+    result, cli = _feed_cli_with_input("hello world\x1b[1;5DY\r")
+    assert result.text == "hello Yworld"
+
+    # <esc>-f with argument. (forward-word)
+    result, cli = _feed_cli_with_input("hello world abc def\x01\x1b3\x1bfX\r")
+    assert result.text == "hello world abcX def"
+
+    # <esc>-f with negative argument. (forward-word)
+    result, cli = _feed_cli_with_input("hello world abc def\x1b-\x1b3\x1bfX\r")
+    assert result.text == "hello Xworld abc def"
+
+    # <esc>-b with argument. (backward-word)
+    result, cli = _feed_cli_with_input("hello world abc def\x1b3\x1bbX\r")
+    assert result.text == "hello Xworld abc def"
+
+    # <esc>-b with negative argument. (backward-word)
+    result, cli = _feed_cli_with_input("hello world abc def\x01\x1b-\x1b3\x1bbX\r")
+    assert result.text == "hello world abc Xdef"
+
+    # ControlW (kill-word / unix-word-rubout)
+    result, cli = _feed_cli_with_input("hello world\x17\r")
+    assert result.text == "hello "
+    assert cli.clipboard.get_data().text == "world"
+
+    result, cli = _feed_cli_with_input("test hello world\x1b2\x17\r")
+    assert result.text == "test "
+
+    # Escape Backspace (unix-word-rubout)
+    result, cli = _feed_cli_with_input("hello world\x1b\x7f\r")
+    assert result.text == "hello "
+    assert cli.clipboard.get_data().text == "world"
+
+    result, cli = _feed_cli_with_input("hello world\x1b\x08\r")
+    assert result.text == "hello "
+    assert cli.clipboard.get_data().text == "world"
+
+    # Backspace (backward-delete-char)
+    result, cli = _feed_cli_with_input("hello world\x7f\r")
+    assert result.text == "hello worl"
+    assert result.cursor_position == len("hello worl")
+
+    result, cli = _feed_cli_with_input("hello world\x08\r")
+    assert result.text == "hello worl"
+    assert result.cursor_position == len("hello worl")
+
+    # Delete (delete-char)
+    result, cli = _feed_cli_with_input("hello world\x01\x1b[3~\r")
+    assert result.text == "ello world"
+    assert result.cursor_position == 0
+
+    # Escape-\\ (delete-horizontal-space)
+    result, cli = _feed_cli_with_input("hello     world\x1b8\x02\x1b\\\r")
+    assert result.text == "helloworld"
+    assert result.cursor_position == len("hello")
+
+
+def test_emacs_kill_multiple_words_and_paste():
+    # Using control-w twice should place both words on the clipboard.
+    result, cli = _feed_cli_with_input(
+        "hello world test\x17\x17--\x19\x19\r"  # Twice c-w.  Twice c-y.
+    )
+    assert result.text == "hello --world testworld test"
+    assert cli.clipboard.get_data().text == "world test"
+
+    # Using alt-d twice should place both words on the clipboard.
+    result, cli = _feed_cli_with_input(
+        "hello world test"
+        "\x1bb\x1bb"  # Twice left.
+        "\x1bd\x1bd"  # Twice kill-word.
+        "abc"
+        "\x19"  # Paste.
+        "\r"
+    )
+    assert result.text == "hello abcworld test"
+    assert cli.clipboard.get_data().text == "world test"
+
+
+def test_interrupts():
+    # ControlC: raise KeyboardInterrupt.
+    with pytest.raises(KeyboardInterrupt):
+        result, cli = _feed_cli_with_input("hello\x03\r")
+
+    with pytest.raises(KeyboardInterrupt):
+        result, cli = _feed_cli_with_input("hello\x03\r")
+
+    # ControlD without any input: raises EOFError.
+    with pytest.raises(EOFError):
+        result, cli = _feed_cli_with_input("\x04\r")
+
+
+def test_emacs_yank():
+    # ControlY (yank)
+    c = InMemoryClipboard(ClipboardData("XYZ"))
+    result, cli = _feed_cli_with_input("hello\x02\x19\r", clipboard=c)
+    assert result.text == "hellXYZo"
+    assert result.cursor_position == len("hellXYZ")
+
+
+def test_quoted_insert():
+    # ControlQ - ControlB (quoted-insert)
+    result, cli = _feed_cli_with_input("hello\x11\x02\r")
+    assert result.text == "hello\x02"
+
+
+def test_transformations():
+    # Meta-c (capitalize-word)
+    result, cli = _feed_cli_with_input("hello world\01\x1bc\r")
+    assert result.text == "Hello world"
+    assert result.cursor_position == len("Hello")
+
+    # Meta-u (uppercase-word)
+    result, cli = _feed_cli_with_input("hello world\01\x1bu\r")
+    assert result.text == "HELLO world"
+    assert result.cursor_position == len("Hello")
+
+    # Meta-u (downcase-word)
+    result, cli = _feed_cli_with_input("HELLO WORLD\01\x1bl\r")
+    assert result.text == "hello WORLD"
+    assert result.cursor_position == len("Hello")
+
+    # ControlT (transpose-chars)
+    result, cli = _feed_cli_with_input("hello\x14\r")
+    assert result.text == "helol"
+    assert result.cursor_position == len("hello")
+
+    # Left, Left, Control-T (transpose-chars)
+    result, cli = _feed_cli_with_input("abcde\x1b[D\x1b[D\x14\r")
+    assert result.text == "abdce"
+    assert result.cursor_position == len("abcd")
+
+
+def test_emacs_other_bindings():
+    # Transpose characters.
+    result, cli = _feed_cli_with_input("abcde\x14X\r")  # Ctrl-T
+    assert result.text == "abcedX"
+
+    # Left, Left, Transpose. (This is slightly different.)
+    result, cli = _feed_cli_with_input("abcde\x1b[D\x1b[D\x14X\r")
+    assert result.text == "abdcXe"
+
+    # Clear before cursor.
+    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x15X\r")
+    assert result.text == "Xlo"
+
+    # unix-word-rubout: delete word before the cursor.
+    # (ControlW).
+    result, cli = _feed_cli_with_input("hello world test\x17X\r")
+    assert result.text == "hello world X"
+
+    result, cli = _feed_cli_with_input("hello world /some/very/long/path\x17X\r")
+    assert result.text == "hello world X"
+
+    # (with argument.)
+    result, cli = _feed_cli_with_input("hello world test\x1b2\x17X\r")
+    assert result.text == "hello X"
+
+    result, cli = _feed_cli_with_input("hello world /some/very/long/path\x1b2\x17X\r")
+    assert result.text == "hello X"
+
+    # backward-kill-word: delete word before the cursor.
+    # (Esc-ControlH).
+    result, cli = _feed_cli_with_input("hello world /some/very/long/path\x1b\x08X\r")
+    assert result.text == "hello world /some/very/long/X"
+
+    # (with arguments.)
+    result, cli = _feed_cli_with_input(
+        "hello world /some/very/long/path\x1b3\x1b\x08X\r"
+    )
+    assert result.text == "hello world /some/very/X"
+
+
+def test_controlx_controlx():
+    # At the end: go to the start of the line.
+    result, cli = _feed_cli_with_input("hello world\x18\x18X\r")
+    assert result.text == "Xhello world"
+    assert result.cursor_position == 1
+
+    # At the start: go to the end of the line.
+    result, cli = _feed_cli_with_input("hello world\x01\x18\x18X\r")
+    assert result.text == "hello worldX"
+
+    # Left, Left Control-X Control-X: go to the end of the line.
+    result, cli = _feed_cli_with_input("hello world\x1b[D\x1b[D\x18\x18X\r")
+    assert result.text == "hello worldX"
+
+
+def test_emacs_history_bindings():
+    # Adding a new item to the history.
+    history = _history()
+    result, cli = _feed_cli_with_input("new input\r", history=history)
+    assert result.text == "new input"
+    history.get_strings()[-1] == "new input"
+
+    # Go up in history, and accept the last item.
+    result, cli = _feed_cli_with_input("hello\x1b[A\r", history=history)
+    assert result.text == "new input"
+
+    # Esc< (beginning-of-history)
+    result, cli = _feed_cli_with_input("hello\x1b<\r", history=history)
+    assert result.text == "line1 first input"
+
+    # Esc> (end-of-history)
+    result, cli = _feed_cli_with_input(
+        "another item\x1b[A\x1b[a\x1b>\r", history=history
+    )
+    assert result.text == "another item"
+
+    # ControlUp (previous-history)
+    result, cli = _feed_cli_with_input("\x1b[1;5A\r", history=history)
+    assert result.text == "another item"
+
+    # Esc< ControlDown (beginning-of-history, next-history)
+    result, cli = _feed_cli_with_input("\x1b<\x1b[1;5B\r", history=history)
+    assert result.text == "line2 second input"
+
+
+def test_emacs_reverse_search():
+    history = _history()
+
+    # ControlR  (reverse-search-history)
+    result, cli = _feed_cli_with_input("\x12input\r\r", history=history)
+    assert result.text == "line3 third input"
+
+    # Hitting ControlR twice.
+    result, cli = _feed_cli_with_input("\x12input\x12\r\r", history=history)
+    assert result.text == "line2 second input"
+
+
+def test_emacs_arguments():
+    """
+    Test various combinations of arguments in Emacs mode.
+    """
+    # esc 4
+    result, cli = _feed_cli_with_input("\x1b4x\r")
+    assert result.text == "xxxx"
+
+    # esc 4 4
+    result, cli = _feed_cli_with_input("\x1b44x\r")
+    assert result.text == "x" * 44
+
+    # esc 4 esc 4
+    result, cli = _feed_cli_with_input("\x1b4\x1b4x\r")
+    assert result.text == "x" * 44
+
+    # esc - right (-1 position to the right, equals 1 to the left.)
+    result, cli = _feed_cli_with_input("aaaa\x1b-\x1b[Cbbbb\r")
+    assert result.text == "aaabbbba"
+
+    # esc - 3 right
+    result, cli = _feed_cli_with_input("aaaa\x1b-3\x1b[Cbbbb\r")
+    assert result.text == "abbbbaaa"
+
+    # esc - - - 3 right
+    result, cli = _feed_cli_with_input("aaaa\x1b---3\x1b[Cbbbb\r")
+    assert result.text == "abbbbaaa"
+
+
+def test_emacs_arguments_for_all_commands():
+    """
+    Test all Emacs commands with Meta-[0-9] arguments (both positive and
+    negative). No one should crash.
+    """
+    for key in ANSI_SEQUENCES:
+        # Ignore BracketedPaste. This would hang forever, because it waits for
+        # the end sequence.
+        if key != "\x1b[200~":
+            try:
+                # Note: we add an 'X' after the key, because Ctrl-Q (quoted-insert)
+                # expects something to follow. We add an additional \r, because
+                # Ctrl-R and Ctrl-S (reverse-search) expect that.
+                result, cli = _feed_cli_with_input("hello\x1b4" + key + "X\r\r")
+
+                result, cli = _feed_cli_with_input("hello\x1b-" + key + "X\r\r")
+            except KeyboardInterrupt:
+                # This exception should only be raised for Ctrl-C
+                assert key == "\x03"
+
+
+def test_emacs_kill_ring():
+    operations = (
+        # abc ControlA ControlK
+        "abc\x01\x0b"
+        # def ControlA ControlK
+        "def\x01\x0b"
+        # ghi ControlA ControlK
+        "ghi\x01\x0b"
+        # ControlY (yank)
+        "\x19"
+    )
+
+    result, cli = _feed_cli_with_input(operations + "\r")
+    assert result.text == "ghi"
+
+    result, cli = _feed_cli_with_input(operations + "\x1by\r")
+    assert result.text == "def"
+
+    result, cli = _feed_cli_with_input(operations + "\x1by\x1by\r")
+    assert result.text == "abc"
+
+    result, cli = _feed_cli_with_input(operations + "\x1by\x1by\x1by\r")
+    assert result.text == "ghi"
+
+
+def test_emacs_selection():
+    # Copy/paste empty selection should not do anything.
+    operations = (
+        "hello"
+        # Twice left.
+        "\x1b[D\x1b[D"
+        # Control-Space
+        "\x00"
+        # ControlW (cut)
+        "\x17"
+        # ControlY twice. (paste twice)
+        "\x19\x19\r"
+    )
+
+    result, cli = _feed_cli_with_input(operations)
+    assert result.text == "hello"
+
+    # Copy/paste one character.
+    operations = (
+        "hello"
+        # Twice left.
+        "\x1b[D\x1b[D"
+        # Control-Space
+        "\x00"
+        # Right.
+        "\x1b[C"
+        # ControlW (cut)
+        "\x17"
+        # ControlA (Home).
+        "\x01"
+        # ControlY (paste)
+        "\x19\r"
+    )
+
+    result, cli = _feed_cli_with_input(operations)
+    assert result.text == "lhelo"
+
+
+def test_emacs_insert_comment():
+    # Test insert-comment (M-#) binding.
+    result, cli = _feed_cli_with_input("hello\x1b#", check_line_ending=False)
+    assert result.text == "#hello"
+
+    result, cli = _feed_cli_with_input(
+        "hello\rworld\x1b#", check_line_ending=False, multiline=True
+    )
+    assert result.text == "#hello\n#world"
+
+
+def test_emacs_record_macro():
+    operations = (
+        "  "
+        "\x18("  # Start recording macro. C-X(
+        "hello"
+        "\x18)"  # Stop recording macro.
+        "  "
+        "\x18e"  # Execute macro.
+        "\x18e"  # Execute macro.
+        "\r"
+    )
+
+    result, cli = _feed_cli_with_input(operations)
+    assert result.text == "  hello  hellohello"
+
+
+def test_emacs_nested_macro():
+    "Test calling the macro within a macro."
+    # Calling a macro within a macro should take the previous recording (if one
+    # exists), not the one that is in progress.
+    operations = (
+        "\x18("  # Start recording macro. C-X(
+        "hello"
+        "\x18e"  # Execute macro.
+        "\x18)"  # Stop recording macro.
+        "\x18e"  # Execute macro.
+        "\r"
+    )
+
+    result, cli = _feed_cli_with_input(operations)
+    assert result.text == "hellohello"
+
+    operations = (
+        "\x18("  # Start recording macro. C-X(
+        "hello"
+        "\x18)"  # Stop recording macro.
+        "\x18("  # Start recording macro. C-X(
+        "\x18e"  # Execute macro.
+        "world"
+        "\x18)"  # Stop recording macro.
+        "\x01\x0b"  # Delete all (c-a c-k).
+        "\x18e"  # Execute macro.
+        "\r"
+    )
+
+    result, cli = _feed_cli_with_input(operations)
+    assert result.text == "helloworld"
+
+
+def test_prefix_meta():
+    # Test the prefix-meta command.
+    b = KeyBindings()
+    b.add("j", "j", filter=ViInsertMode())(prefix_meta)
+
+    result, cli = _feed_cli_with_input(
+        "hellojjIX\r", key_bindings=b, editing_mode=EditingMode.VI
+    )
+    assert result.text == "Xhello"
+
+
+def test_bracketed_paste():
+    result, cli = _feed_cli_with_input("\x1b[200~hello world\x1b[201~\r")
+    assert result.text == "hello world"
+
+    result, cli = _feed_cli_with_input("\x1b[200~hello\rworld\x1b[201~\x1b\r")
+    assert result.text == "hello\nworld"
+
+    # With \r\n endings.
+    result, cli = _feed_cli_with_input("\x1b[200~hello\r\nworld\x1b[201~\x1b\r")
+    assert result.text == "hello\nworld"
+
+    # With \n endings.
+    result, cli = _feed_cli_with_input("\x1b[200~hello\nworld\x1b[201~\x1b\r")
+    assert result.text == "hello\nworld"
+
+
+def test_vi_cursor_movements():
+    """
+    Test cursor movements with Vi key bindings.
+    """
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    result, cli = feed("\x1b\r")
+    assert result.text == ""
+    assert cli.editing_mode == EditingMode.VI
+
+    # Esc h a X
+    result, cli = feed("hello\x1bhaX\r")
+    assert result.text == "hellXo"
+
+    # Esc I X
+    result, cli = feed("hello\x1bIX\r")
+    assert result.text == "Xhello"
+
+    # Esc I X
+    result, cli = feed("hello\x1bIX\r")
+    assert result.text == "Xhello"
+
+    # Esc 2hiX
+    result, cli = feed("hello\x1b2hiX\r")
+    assert result.text == "heXllo"
+
+    # Esc 2h2liX
+    result, cli = feed("hello\x1b2h2liX\r")
+    assert result.text == "hellXo"
+
+    # Esc \b\b
+    result, cli = feed("hello\b\b\r")
+    assert result.text == "hel"
+
+    # Esc \b\b
+    result, cli = feed("hello\b\b\r")
+    assert result.text == "hel"
+
+    # Esc 2h D
+    result, cli = feed("hello\x1b2hD\r")
+    assert result.text == "he"
+
+    # Esc 2h rX \r
+    result, cli = feed("hello\x1b2hrX\r")
+    assert result.text == "heXlo"
+
+
+def test_vi_operators():
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    # Esc g~0
+    result, cli = feed("hello\x1bg~0\r")
+    assert result.text == "HELLo"
+
+    # Esc gU0
+    result, cli = feed("hello\x1bgU0\r")
+    assert result.text == "HELLo"
+
+    # Esc d0
+    result, cli = feed("hello\x1bd0\r")
+    assert result.text == "o"
+
+
+def test_vi_text_objects():
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    # Esc gUgg
+    result, cli = feed("hello\x1bgUgg\r")
+    assert result.text == "HELLO"
+
+    # Esc gUU
+    result, cli = feed("hello\x1bgUU\r")
+    assert result.text == "HELLO"
+
+    # Esc di(
+    result, cli = feed("before(inside)after\x1b8hdi(\r")
+    assert result.text == "before()after"
+
+    # Esc di[
+    result, cli = feed("before[inside]after\x1b8hdi[\r")
+    assert result.text == "before[]after"
+
+    # Esc da(
+    result, cli = feed("before(inside)after\x1b8hda(\r")
+    assert result.text == "beforeafter"
+
+
+def test_vi_digraphs():
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    # C-K o/
+    result, cli = feed("hello\x0bo/\r")
+    assert result.text == "helloø"
+
+    # C-K /o  (reversed input.)
+    result, cli = feed("hello\x0b/o\r")
+    assert result.text == "helloø"
+
+    # C-K e:
+    result, cli = feed("hello\x0be:\r")
+    assert result.text == "helloë"
+
+    # C-K xxy (Unknown digraph.)
+    result, cli = feed("hello\x0bxxy\r")
+    assert result.text == "helloy"
+
+
+def test_vi_block_editing():
+    "Test Vi Control-V style block insertion."
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)
+
+    operations = (
+        # Six lines of text.
+        "-line1\r-line2\r-line3\r-line4\r-line5\r-line6"
+        # Go to the second character of the second line.
+        "\x1bkkkkkkkj0l"
+        # Enter Visual block mode.
+        "\x16"
+        # Go down two more lines.
+        "jj"
+        # Go 3 characters to the right.
+        "lll"
+        # Go to insert mode.
+        "insert"  # (Will be replaced.)
+        # Insert stars.
+        "***"
+        # Escape again.
+        "\x1b\r"
+    )
+
+    # Control-I
+    result, cli = feed(operations.replace("insert", "I"))
+
+    assert result.text == "-line1\n-***line2\n-***line3\n-***line4\n-line5\n-line6"
+
+    # Control-A
+    result, cli = feed(operations.replace("insert", "A"))
+
+    assert result.text == "-line1\n-line***2\n-line***3\n-line***4\n-line5\n-line6"
+
+
+def test_vi_block_editing_empty_lines():
+    "Test block editing on empty lines."
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)
+
+    operations = (
+        # Six empty lines.
+        "\r\r\r\r\r"
+        # Go to beginning of the document.
+        "\x1bgg"
+        # Enter Visual block mode.
+        "\x16"
+        # Go down two more lines.
+        "jj"
+        # Go 3 characters to the right.
+        "lll"
+        # Go to insert mode.
+        "insert"  # (Will be replaced.)
+        # Insert stars.
+        "***"
+        # Escape again.
+        "\x1b\r"
+    )
+
+    # Control-I
+    result, cli = feed(operations.replace("insert", "I"))
+
+    assert result.text == "***\n***\n***\n\n\n"
+
+    # Control-A
+    result, cli = feed(operations.replace("insert", "A"))
+
+    assert result.text == "***\n***\n***\n\n\n"
+
+
+def test_vi_visual_line_copy():
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)
+
+    operations = (
+        # Three lines of text.
+        "-line1\r-line2\r-line3\r-line4\r-line5\r-line6"
+        # Go to the second character of the second line.
+        "\x1bkkkkkkkj0l"
+        # Enter Visual linemode.
+        "V"
+        # Go down one line.
+        "j"
+        # Go 3 characters to the right (should not do much).
+        "lll"
+        # Copy this block.
+        "y"
+        # Go down one line.
+        "j"
+        # Insert block twice.
+        "2p"
+        # Escape again.
+        "\x1b\r"
+    )
+
+    result, cli = feed(operations)
+
+    assert (
+        result.text
+        == "-line1\n-line2\n-line3\n-line4\n-line2\n-line3\n-line2\n-line3\n-line5\n-line6"
+    )
+
+
+def test_vi_visual_empty_line():
+    """
+    Test edge case with an empty line in Visual-line mode.
+    """
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)
+
+    # 1. Delete first two lines.
+    operations = (
+        # Three lines of text. The middle one is empty.
+        "hello\r\rworld"
+        # Go to the start.
+        "\x1bgg"
+        # Visual line and move down.
+        "Vj"
+        # Delete.
+        "d\r"
+    )
+    result, cli = feed(operations)
+    assert result.text == "world"
+
+    # 1. Delete middle line.
+    operations = (
+        # Three lines of text. The middle one is empty.
+        "hello\r\rworld"
+        # Go to middle line.
+        "\x1bggj"
+        # Delete line
+        "Vd\r"
+    )
+
+    result, cli = feed(operations)
+    assert result.text == "hello\nworld"
+
+
+def test_vi_character_delete_after_cursor():
+    "Test 'x' keypress."
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)
+
+    # Delete one character.
+    result, cli = feed("abcd\x1bHx\r")
+    assert result.text == "bcd"
+
+    # Delete multiple character.s
+    result, cli = feed("abcd\x1bH3x\r")
+    assert result.text == "d"
+
+    # Delete on empty line.
+    result, cli = feed("\x1bo\x1bo\x1bggx\r")
+    assert result.text == "\n\n"
+
+    # Delete multiple on empty line.
+    result, cli = feed("\x1bo\x1bo\x1bgg10x\r")
+    assert result.text == "\n\n"
+
+    # Delete multiple on empty line.
+    result, cli = feed("hello\x1bo\x1bo\x1bgg3x\r")
+    assert result.text == "lo\n\n"
+
+
+def test_vi_character_delete_before_cursor():
+    "Test 'X' keypress."
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)
+
+    # Delete one character.
+    result, cli = feed("abcd\x1bX\r")
+    assert result.text == "abd"
+
+    # Delete multiple character.
+    result, cli = feed("hello world\x1b3X\r")
+    assert result.text == "hello wd"
+
+    # Delete multiple character on multiple lines.
+    result, cli = feed("hello\x1boworld\x1bgg$3X\r")
+    assert result.text == "ho\nworld"
+
+    result, cli = feed("hello\x1boworld\x1b100X\r")
+    assert result.text == "hello\nd"
+
+    # Delete on empty line.
+    result, cli = feed("\x1bo\x1bo\x1b10X\r")
+    assert result.text == "\n\n"
+
+
+def test_vi_character_paste():
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    # Test 'p' character paste.
+    result, cli = feed("abcde\x1bhhxp\r")
+    assert result.text == "abdce"
+    assert result.cursor_position == 3
+
+    # Test 'P' character paste.
+    result, cli = feed("abcde\x1bhhxP\r")
+    assert result.text == "abcde"
+    assert result.cursor_position == 2
+
+
+def test_vi_temp_navigation_mode():
+    """
+    Test c-o binding: go for one action into navigation mode.
+    """
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    result, cli = feed("abcde" "\x0f" "3h" "x\r")  # c-o  # 3 times to the left.
+    assert result.text == "axbcde"
+    assert result.cursor_position == 2
+
+    result, cli = feed("abcde" "\x0f" "b" "x\r")  # c-o  # One word backwards.
+    assert result.text == "xabcde"
+    assert result.cursor_position == 1
+
+    # In replace mode
+    result, cli = feed(
+        "abcdef"
+        "\x1b"  # Navigation mode.
+        "0l"  # Start of line, one character to the right.
+        "R"  # Replace mode
+        "78"
+        "\x0f"  # c-o
+        "l"  # One character forwards.
+        "9\r"
+    )
+    assert result.text == "a78d9f"
+    assert result.cursor_position == 5
+
+
+def test_vi_macros():
+    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
+
+    # Record and execute macro.
+    result, cli = feed("\x1bqcahello\x1bq@c\r")
+    assert result.text == "hellohello"
+    assert result.cursor_position == 9
+
+    # Running unknown macro.
+    result, cli = feed("\x1b@d\r")
+    assert result.text == ""
+    assert result.cursor_position == 0
+
+    # When a macro is called within a macro.
+    # It shouldn't result in eternal recursion.
+    result, cli = feed("\x1bqxahello\x1b@xq@x\r")
+    assert result.text == "hellohello"
+    assert result.cursor_position == 9
+
+    # Nested macros.
+    result, cli = feed(
+        # Define macro 'x'.
+        "\x1bqxahello\x1bq"
+        # Define macro 'y' which calls 'x'.
+        "qya\x1b@xaworld\x1bq"
+        # Delete line.
+        "2dd"
+        # Execute 'y'
+        "@y\r"
+    )
+
+    assert result.text == "helloworld"
+
+
+def test_accept_default():
+    """
+    Test `prompt(accept_default=True)`.
+    """
+    with create_pipe_input() as inp:
+        session = PromptSession(input=inp, output=DummyOutput())
+        result = session.prompt(default="hello", accept_default=True)
+        assert result == "hello"
+
+        # Test calling prompt() for a second time. (We had an issue where the
+        # prompt reset between calls happened at the wrong time, breaking this.)
+        result = session.prompt(default="world", accept_default=True)
+        assert result == "world"
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