def test_erase_in_line():
screen = update(Screen(5, 5),
["sam i", "s foo", "but a", "re yo", "u? "],
colored=[0])
screen.cursor_position(1, 3)
# a) erase from cursor to the end of line
screen.erase_in_line(0)
assert (screen.cursor.y, screen.cursor.x) == (0, 2)
assert screen.display == ["sa ", "s foo", "but a", "re yo", "u? "]
assert screen[0] == [
Char("s", fg="red"),
Char("a", fg="red"), screen.default_char, screen.default_char,
screen.default_char
]
# b) erase from the beginning of the line to the cursor
screen = update(screen, ["sam i", "s foo", "but a", "re yo", "u? "],
colored=[0])
screen.erase_in_line(1)
assert (screen.cursor.y, screen.cursor.x) == (0, 2)
assert screen.display == [" i", "s foo", "but a", "re yo", "u? "]
assert screen[0] == [
screen.default_char, screen.default_char, screen.default_char,
Char(" ", fg="red"),
Char("i", fg="red")
]
# c) erase the entire line
screen = update(screen, ["sam i", "s foo", "but a", "re yo", "u? "],
colored=[0])
screen.erase_in_line(2)
assert (screen.cursor.y, screen.cursor.x) == (0, 2)
assert screen.display == [" ", "s foo", "but a", "re yo", "u? "]
assert screen[0] == [screen.default_char] * 5
def test_erase_in_display():
screen = update(Screen(5, 5),
["sam i", "s foo", "but a", "re yo", "u? "],
colored=[2, 3])
screen.cursor_position(3, 3)
# a) erase from cursor to the end of the display, including
# the cursor
screen.erase_in_display(0)
assert (screen.cursor.y, screen.cursor.x) == (2, 2)
assert screen.display == ["sam i", "s foo", "bu ", " ", " "]
assert screen[2:] == [[
Char("b", fg="red"),
Char("u", fg="red"), screen.default_char, screen.default_char,
screen.default_char
], [screen.default_char] * 5, [screen.default_char] * 5]
# b) erase from the beginning of the display to the cursor,
# including it
screen = update(screen, ["sam i", "s foo", "but a", "re yo", "u? "],
colored=[2, 3])
screen.erase_in_display(1)
assert (screen.cursor.y, screen.cursor.x) == (2, 2)
assert screen.display == [" ", " ", " a", "re yo", "u? "]
assert screen[:3] == [
[screen.default_char] * 5,
[screen.default_char] * 5,
[
screen.default_char, screen.default_char, screen.default_char,
Char(" ", fg="red"),
Char("a", fg="red")
],
]
# c) erase the while display
screen.erase_in_display(2)
assert (screen.cursor.y, screen.cursor.x) == (2, 2)
assert screen.display == [" ", " ", " ", " ", " "]
assert screen == [[screen.default_char] * 5] * 5
def test_attributes():
screen = Screen(2, 2)
assert screen == [[screen.default_char, screen.default_char]] * 2
screen.select_graphic_rendition(1) # Bold
# Still default, since we haven't written anything.
assert screen == [[screen.default_char, screen.default_char]] * 2
assert screen.cursor.attrs.bold
screen.draw("f")
assert screen == [[
Char("f", "default", "default", bold=True), screen.default_char
], [screen.default_char, screen.default_char]]
def update(screen, lines, colored=[]):
"""Updates a given screen object with given lines, colors each line
from ``colored`` in "red" and returns the modified screen.
"""
for y, line in enumerate(lines):
for x, char in enumerate(line):
if y in colored:
attrs = {"fg": "red"}
else:
attrs = {}
screen[y][x] = Char(data=char, **attrs)
return screen
def test_erase_character():
screen = update(Screen(3, 3), ["sam", "is ", "foo"], colored=[0])
screen.erase_characters(2)
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen.display == [" m", "is ", "foo"]
assert screen[0] == [
screen.default_char, screen.default_char,
Char("m", fg="red")
]
screen.cursor.y, screen.cursor.x = 2, 2
screen.erase_characters()
assert (screen.cursor.y, screen.cursor.x) == (2, 2)
assert screen.display == [" m", "is ", "fo "]
screen.cursor.y, screen.cursor.x = 1, 1
screen.erase_characters(0)
assert (screen.cursor.y, screen.cursor.x) == (1, 1)
assert screen.display == [" m", "i ", "fo "]
# ! extreme cases.
screen = update(Screen(5, 1), ["12345"], colored=[0])
screen.cursor.x = 1
screen.erase_characters(3)
assert (screen.cursor.y, screen.cursor.x) == (0, 1)
assert screen.display == ["1 5"]
assert screen[0] == [
Char("1", fg="red"), screen.default_char, screen.default_char,
screen.default_char,
Char("5", "red")
]
screen = update(Screen(5, 1), ["12345"], colored=[0])
screen.cursor.x = 2
screen.erase_characters(10)
assert (screen.cursor.y, screen.cursor.x) == (0, 2)
assert screen.display == ["12 "]
assert screen[0] == [
Char("1", fg="red"),
Char("2", fg="red"), screen.default_char, screen.default_char,
screen.default_char
]
screen = update(Screen(5, 1), ["12345"], colored=[0])
screen.erase_characters(4)
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen.display == [" 5"]
assert screen[0] == [
screen.default_char, screen.default_char, screen.default_char,
screen.default_char,
Char("5", fg="red")
]
def test_insert_characters():
screen = update(Screen(3, 3), ["sam", "is ", "foo"], colored=[0])
# a) normal case
cursor = copy.copy(screen.cursor)
screen.insert_characters(2)
assert (screen.cursor.y, screen.cursor.x) == (cursor.y, cursor.x)
assert screen[0] == [
screen.default_char, screen.default_char,
Char("s", fg="red")
]
# b) now inserting from the middle of the line
screen.cursor.y, screen.cursor.x = 2, 1
screen.insert_characters(1)
assert screen[2] == [Char("f"), screen.default_char, Char("o")]
# c) inserting more than we have
screen.insert_characters(10)
assert screen[2] == [Char("f"), screen.default_char, screen.default_char]
# d) 0 is 1
screen = update(Screen(3, 3), ["sam", "is ", "foo"], colored=[0])
screen.cursor_position()
screen.insert_characters()
assert screen[0] == [
screen.default_char,
Char("s", fg="red"),
Char("a", fg="red")
]
screen = update(Screen(3, 3), ["sam", "is ", "foo"], colored=[0])
screen.cursor_position()
screen.insert_characters(1)
assert screen[0] == [
screen.default_char,
Char("s", fg="red"),
Char("a", fg="red")
]
def test_save_cursor():
# a) cursor position
screen = Screen(10, 10)
screen.save_cursor()
screen.cursor.x, screen.cursor.y = 3, 5
screen.save_cursor()
screen.cursor.x, screen.cursor.y = 4, 4
screen.restore_cursor()
assert screen.cursor.x == 3
assert screen.cursor.y == 5
screen.restore_cursor()
assert screen.cursor.x == 0
assert screen.cursor.y == 0
# b) modes
screen = Screen(10, 10)
screen.set_mode(mo.DECAWM, mo.DECOM)
screen.save_cursor()
screen.reset_mode(mo.DECAWM)
screen.restore_cursor()
assert mo.DECAWM in screen.mode
assert mo.DECOM in screen.mode
# c) attributes
screen = Screen(10, 10)
screen.select_graphic_rendition(4)
screen.save_cursor()
screen.select_graphic_rendition(24)
assert screen.cursor.attrs == screen.default_char
screen.restore_cursor()
assert screen.cursor.attrs != screen.default_char
assert screen.cursor.attrs == Char(" ", underscore=True)
def test_attributes_reset():
screen = Screen(2, 2)
assert screen == [[screen.default_char, screen.default_char]] * 2
screen.select_graphic_rendition(1)
screen.draw("f")
screen.draw("o")
screen.draw("o")
assert screen == [
[Char("f", bold=True), Char("o", bold=True)],
[Char("o", bold=True), screen.default_char],
]
screen.cursor_position()
screen.select_graphic_rendition(0) # Reset
screen.draw("f")
assert screen == [
[Char("f"), Char("o", bold=True)],
[Char("o", bold=True), screen.default_char],
]
def test_delete_lines():
# a) without margins
screen = update(Screen(3, 3), ["sam", "is ", "foo"], colored=[1])
screen.delete_lines()
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen.display == ["is ", "foo", " "]
assert screen == [
[Char("i", fg="red"),
Char("s", fg="red"),
Char(" ", fg="red")],
[Char("f"), Char("o"), Char("o")],
[screen.default_char] * 3,
]
screen.delete_lines(0)
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen.display == ["foo", " ", " "]
assert screen == [
[Char("f"), Char("o"), Char("o")],
[screen.default_char] * 3,
[screen.default_char] * 3,
]
# b) with margins
screen = update(Screen(3, 5), ["sam", "is ", "foo", "bar", "baz"],
colored=[2, 3])
screen.set_margins(1, 4)
screen.cursor.y = 1
screen.delete_lines(1)
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["sam", "foo", "bar", " ", "baz"]
assert screen == [
[Char("s"), Char("a"), Char("m")],
[Char("f", fg="red"),
Char("o", fg="red"),
Char("o", fg="red")],
[Char("b", fg="red"),
Char("a", fg="red"),
Char("r", fg="red")],
[screen.default_char] * 3,
[Char("b"), Char("a"), Char("z")],
]
screen = update(Screen(3, 5), ["sam", "is ", "foo", "bar", "baz"],
colored=[2, 3])
screen.set_margins(1, 4)
screen.cursor.y = 1
screen.delete_lines(2)
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["sam", "bar", " ", " ", "baz"]
assert screen == [
[Char("s"), Char("a"), Char("m")],
[Char("b", fg="red"),
Char("a", fg="red"),
Char("r", fg="red")],
[screen.default_char] * 3,
[screen.default_char] * 3,
[Char("b"), Char("a"), Char("z")],
]
# c) with margins -- trying to delete more than we have available
screen = update(
Screen(3, 5), ["sam", "is ", "foo", "bar", "baz"],
[None, None, [("red", "default")] * 3, [("red", "default")] * 3, None])
screen.set_margins(1, 4)
screen.cursor.y = 1
screen.delete_lines(5)
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["sam", " ", " ", " ", "baz"]
assert screen == [
[Char("s"), Char("a"), Char("m")],
[screen.default_char] * 3,
[screen.default_char] * 3,
[screen.default_char] * 3,
[Char("b"), Char("a"), Char("z")],
]
# d) with margins -- trying to delete outside scroll boundaries;
# expecting nothing to change
screen = update(Screen(3, 5), ["sam", "is ", "foo", "bar", "baz"],
colored=[2, 3])
screen.set_margins(2, 4)
screen.cursor.y = 0
screen.delete_lines(5)
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen.display == ["sam", "is ", "foo", "bar", "baz"]
assert screen == [
[Char("s"), Char("a"), Char("m")],
[Char("i"), Char("s"), Char(" ")],
[Char("f", fg="red"),
Char("o", fg="red"),
Char("o", fg="red")],
[Char("b", fg="red"),
Char("a", fg="red"),
Char("r", fg="red")],
[Char("b"), Char("a"), Char("z")],
]
def test_reverse_index():
screen = update(Screen(2, 2), ["wo", "ot"], colored=[0])
# a) reverse indexing on the first row should push rows down
# and create a new row at the top.
screen.reverse_index()
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen == [[screen.default_char, screen.default_char],
[Char("w", fg="red"),
Char("o", fg="red")]]
# b) once again ...
screen.reverse_index()
assert (screen.cursor.y, screen.cursor.x) == (0, 0)
assert screen == [
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
]
# c) same with margins
screen = update(Screen(2, 5), ["bo", "sh", "th", "er", "oh"],
colored=[2, 3])
screen.set_margins(2, 4)
screen.cursor.y = 1
# ... go!
screen.reverse_index()
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["bo", " ", "sh", "th", "oh"]
assert screen == [
[Char("b"), Char("o")],
[screen.default_char, screen.default_char],
[Char("s"), Char("h")],
[Char("t", fg="red"), Char("h", fg="red")],
[Char("o"), Char("h")],
]
# ... and again ...
screen.reverse_index()
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["bo", " ", " ", "sh", "oh"]
assert screen == [
[Char("b"), Char("o")],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[Char("s"), Char("h")],
[Char("o"), Char("h")],
]
# ... and again ...
screen.reverse_index()
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["bo", " ", " ", " ", "oh"]
assert screen == [
[Char("b"), Char("o")],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[Char("o"), Char("h")],
]
# look, nothing changes!
screen.reverse_index()
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen.display == ["bo", " ", " ", " ", "oh"]
assert screen == [
[Char("b"), Char("o")],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[Char("o"), Char("h")],
]
def test_index():
screen = update(Screen(2, 2), ["wo", "ot"], colored=[1])
# a) indexing on a row that isn't the last should just move
# the cursor down.
screen.index()
assert (screen.cursor.y, screen.cursor.x) == (1, 0)
assert screen == [[Char("w"), Char("o")],
[Char("o", fg="red"),
Char("t", fg="red")]]
# b) indexing on the last row should push everything up and
# create a new row at the bottom.
screen.index()
assert screen.cursor.y == 1
assert screen == [[Char("o", fg="red"),
Char("t", fg="red")],
[screen.default_char, screen.default_char]]
# c) same with margins
screen = update(Screen(2, 5), ["bo", "sh", "th", "er", "oh"],
colored=[1, 2])
screen.set_margins(2, 4)
screen.cursor.y = 3
# ... go!
screen.index()
assert (screen.cursor.y, screen.cursor.x) == (3, 0)
assert screen.display == ["bo", "th", "er", " ", "oh"]
assert screen == [
[Char("b"), Char("o", "default")],
[Char("t", "red"), Char("h", "red")],
[Char("e"), Char("r")],
[screen.default_char, screen.default_char],
[Char("o"), Char("h")],
]
# ... and again ...
screen.index()
assert (screen.cursor.y, screen.cursor.x) == (3, 0)
assert screen.display == ["bo", "er", " ", " ", "oh"]
assert screen == [
[Char("b"), Char("o")],
[Char("e"), Char("r")],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[Char("o"), Char("h")],
]
# ... and again ...
screen.index()
assert (screen.cursor.y, screen.cursor.x) == (3, 0)
assert screen.display == ["bo", " ", " ", " ", "oh"]
assert screen == [
[Char("b"), Char("o")],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[Char("o"), Char("h")],
]
# look, nothing changes!
screen.index()
assert (screen.cursor.y, screen.cursor.x) == (3, 0)
assert screen.display == ["bo", " ", " ", " ", "oh"]
assert screen == [
[Char("b"), Char("o")],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[screen.default_char, screen.default_char],
[Char("o"), Char("h")],
]