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godot-xterm/test/unit/buffer/test_buffer.gd
Leroy Hopson 0d4e10f5ab Add more features, bug fixes and bugs ;-) 
Most notably:
- Reflow is now working. Terminal size will fill the window and
cols/rows will be resized/calculated based on window and font size.
- Added support for different fonts (i.e. bold, italic, bolditalic).
- Enabled blinking characters.
- Adde more tests and caught a few subtle bugs.
- Removed renderer code (which was part of xterm.js) and just
doing naive rendering in terminal.gd, but it seems to perform
a lot faster.

Still not working completely:
- vim (some weirdness going on).
- vttest (more weirdness).

Todo:
- Fix the above.
- Draw the cursor!
- Improve performance. Performance is still not great. The terminal
becomes unusable when running `yes` or `cmatrix -r`.
2020-05-19 18:55:43 +07:00

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GDScript
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# Copyright (c) 2017 The xterm.js authors. All rights reserved.
# Ported to GDScript by the GodotXterm authors.
# License MIT
extends "res://addons/gut/test.gd"
const Buffer = preload("res://addons/godot_xterm/buffer/buffer.gd")
const CircularList = preload("res://addons/godot_xterm/circular_list.gd")
const CellData = preload("res://addons/godot_xterm/buffer/cell_data.gd")
const AttributeData = preload("res://addons/godot_xterm/buffer/attribute_data.gd")
const TestUtils = preload("res://test/test_utils.gd")
class BaseBufferTest:
extends "res://addons/gut/test.gd"
const INIT_COLS = 80
const INIT_ROWS = 24
const INIT_SCROLLBACK = 1000
var options_service
var buffer_service
var buffer
func before_each():
options_service = TestUtils.MockOptionsService.new({'scrollback': INIT_SCROLLBACK})
buffer_service = TestUtils.MockBufferService.new(INIT_COLS, INIT_ROWS)
buffer = Buffer.new(true, options_service, buffer_service)
class TestInit:
extends BaseBufferTest
func test_buffer_lines():
assert_eq(buffer.lines.get_script(), CircularList)
assert_eq(buffer.lines.max_length, buffer_service.rows + INIT_SCROLLBACK)
func test_buffer_scroll_bottom():
assert_eq(buffer.scroll_bottom, buffer_service.rows - 1)
func test_fill_viewport_rows():
# It should fill the buffer with blank lines based on the size of the viewport
var blank_line_char = buffer.get_blank_line(AttributeData.new()).load_cell(0, CellData.new()).get_as_char_data()
buffer.fill_viewport_rows()
assert_eq(buffer.lines.length, INIT_ROWS)
for y in range(INIT_ROWS):
assert_eq(buffer.lines.get_el(y).length, INIT_COLS)
for x in range(INIT_COLS):
assert_eq(buffer.lines.get_el(y).load_cell(x, CellData.new()).get_as_char_data(), blank_line_char)
class TestGetWrappedRangeForLine:
extends BaseBufferTest
func before_each():
.before_each()
buffer.fill_viewport_rows()
func test_non_wrapped_returns_a_single_row_for_the_first_row():
assert_eq(buffer.get_wrapped_range_for_line(0).first, 0)
assert_eq(buffer.get_wrapped_range_for_line(0).last, 0)
func test_non_wrapped_returns_a_single_row_for_a_middle_row():
assert_eq(buffer.get_wrapped_range_for_line(12).first, 12)
assert_eq(buffer.get_wrapped_range_for_line(12).last, 12)
func test_non_wrapped_returns_a_single_row_for_the_last_row():
assert_eq(buffer.get_wrapped_range_for_line(buffer.lines.length - 1).first, INIT_ROWS - 1)
assert_eq(buffer.get_wrapped_range_for_line(buffer.lines.length - 1).last, INIT_ROWS - 1)
func test_wrapped_returns_a_range_for_first_row():
buffer.lines.get_el(1).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(0).first, 0)
assert_eq(buffer.get_wrapped_range_for_line(0).last, 1)
func test_wrapped_range_for_middle_row_wrapping_upwards():
buffer.fill_viewport_rows()
buffer.lines.get_el(12).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(12).first, 11)
assert_eq(buffer.get_wrapped_range_for_line(12).last, 12)
func test_wrapped_range_for_middle_row_wrapping_downwards():
buffer.lines.get_el(13).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(12).first, 12)
assert_eq(buffer.get_wrapped_range_for_line(12).last, 13)
func test_wrapped_range_for_middle_row_wrapping_both_ways():
buffer.lines.get_el(11).is_wrapped = true
buffer.lines.get_el(12).is_wrapped = true
buffer.lines.get_el(13).is_wrapped = true
buffer.lines.get_el(14).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(12).first, 10)
assert_eq(buffer.get_wrapped_range_for_line(12).last, 14)
func test_wrapped_range_for_last_row():
buffer.lines.get_el(INIT_ROWS - 1).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(buffer.lines.length - 1).first, INIT_ROWS - 2)
assert_eq(buffer.get_wrapped_range_for_line(buffer.lines.length - 1).last, INIT_ROWS - 1)
func test_wrapped_range_for_row_that_wraps_upward_to_first_row():
buffer.lines.get_el(1).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(1).first, 0)
assert_eq(buffer.get_wrapped_range_for_line(1).last, 1)
func test_wrapped_range_for_row_that_wraps_downward_to_last_row():
buffer.lines.get_el(buffer.lines.length - 1).is_wrapped = true
assert_eq(buffer.get_wrapped_range_for_line(buffer.lines.length - 2).first, INIT_ROWS - 2)
assert_eq(buffer.get_wrapped_range_for_line(buffer.lines.length - 2).last, INIT_ROWS - 1)
class TestResize:
extends BaseBufferTest
func before_each():
.before_each()
buffer.fill_viewport_rows()
func test_column_size_reduction_trims_data_in_the_buffer():
buffer.resize(INIT_COLS / 2, INIT_ROWS)
assert_eq(buffer.lines.length, INIT_ROWS)
for i in range(INIT_ROWS):
assert_eq(buffer.lines.get_line(i).length, INIT_COLS / 2)
func test_column_size_increase_adds_pad_columns():
buffer.resize(INIT_COLS + 10, INIT_ROWS)
assert_eq(buffer.lines.length, INIT_ROWS)
for i in range(INIT_ROWS):
assert_eq(buffer.lines.get_line(i).length, INIT_COLS + 10)
func test_row_size_reduction_trims_blank_lines_from_the_end():
buffer.resize(INIT_COLS, INIT_ROWS - 10)
assert_eq(buffer.lines.length, INIT_ROWS - 10)
func test_row_size_reduction_moves_viewport_down_when_it_is_at_the_end():
# Set cursor y to have 5 blank lines below it
buffer.y = INIT_ROWS - 5 - 1
buffer.resize(INIT_COLS, INIT_ROWS - 10)
# Trim 5 rows
assert_eq(buffer.lines.length, INIT_ROWS - 5)
# Shift the viewport down 5 rows
assert_eq(buffer.ydisp, 5)
assert_eq(buffer.ybase, 5)
func test_no_scrollback_trims_from_the_top_of_the_buffer_when_the_cursor_reaches_the_bottom():
buffer = Buffer.new(true, TestUtils.MockOptionsService.new({"scrollback": 0}), buffer_service)
assert_eq(buffer.lines.max_length, INIT_ROWS)
buffer.y = INIT_ROWS - 1
buffer.fill_viewport_rows()
var ch_data = buffer.lines.get_line(5).load_cell(0, CellData.new()).get_as_char_data()
ch_data[1] = "a"
buffer.lines.get_line(5).set_cell(0, CellData.from_char_data(ch_data))
ch_data = buffer.lines.get_line(INIT_ROWS - 1).load_cell(0, CellData.new()).get_as_char_data()
ch_data[1] = "b"
buffer.lines.get_line(INIT_ROWS - 1).set_cell(0, CellData.from_char_data(ch_data))
buffer.resize(INIT_COLS, INIT_ROWS - 5)
assert_eq(buffer.lines.get_line(0).load_cell(0, CellData.new()).get_as_char_data()[1], "a")
assert_eq(buffer.lines.get_line(INIT_ROWS - 1 - 5).load_cell(0, CellData.new()).get_as_char_data()[1], "b")
func test_row_size_increase_adds_blank_lines_to_empty_buffer():
assert_eq(buffer.ydisp, 0)
buffer.resize(INIT_COLS, INIT_ROWS + 10)
assert_eq(buffer.ydisp, 0)
assert_eq(buffer.lines.length, INIT_ROWS + 10)
func test_row_size_increase_shows_more_of_the_buffer_above():
# Create 10 extra blank lines
for i in range(10):
buffer.lines.push(buffer.get_blank_line(AttributeData.new()))
# Set cursor to the bottom of the buffer
buffer.y = INIT_ROWS - 1
# Scroll down 10 lines
buffer.ybase = 10
buffer.ydisp = 10
assert_eq(buffer.lines.length, INIT_ROWS + 10)
buffer.resize(INIT_COLS, INIT_ROWS + 5)
# Should be 5 more lines
assert_eq(buffer.ydisp, 5)
assert_eq(buffer.ybase, 5)
# Should not trim the buffer
assert_eq(buffer.lines.length, INIT_ROWS + 10)
func test_row_size_increase_shows_more_of_the_buffer_below_when_the_viewort_is_at_the_top_of_the_buffer():
# Create 10 extra blank lines
for i in range(10):
buffer.lines.push(buffer.get_blank_line(AttributeData.new()))
# Set cursor to the bottom of the buffer
buffer.y = INIT_ROWS - 1
# Scroll down 10 lines
buffer.ybase = 10
buffer.ydisp = 0
assert_eq(buffer.lines.length, INIT_ROWS + 10)
buffer.resize(INIT_COLS, INIT_ROWS + 5)
# The viewport should remain at the top
assert_eq(buffer.ydisp, 0)
# The buffer ybase should move up 5 lines
assert_eq(buffer.ybase, 5)
# Should not trim the buffer
assert_eq(buffer.lines.length, INIT_ROWS + 10)
func test_row_and_column_increase_resizes_properly():
buffer.resize(INIT_COLS + 5, INIT_ROWS + 5)
assert_eq(buffer.lines.length, INIT_ROWS + 5)
buffer.resize(INIT_COLS - 5, INIT_ROWS)
assert_eq(buffer.lines.length, INIT_ROWS)
func test_reflow_does_not_wrap_empty_lines():
assert_eq(buffer.lines.length, INIT_ROWS)
buffer.resize(INIT_COLS - 5, INIT_ROWS)
assert_eq(buffer.lines.length, INIT_ROWS)
func test_reflow_shrinks_row_length():
buffer.resize(5, 10)
assert_eq(buffer.lines.length, 10)
for i in range(10):
assert_eq(buffer.lines.get_line(i).length, 5)
func test_reflow_wraps_and_unwraps_lines():
buffer.resize(5, 10)
var first_line = buffer.lines.get_line(0)
for i in range(5):
var code = "a".ord_at(0) + i
var ch = char(code)
first_line.set_cell(i, CellData.from_char_data([0, ch, 1, code]))
buffer.y = 1
assert_eq(buffer.lines.get_line(0).length, 5)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "abcde")
buffer.resize(1, 10)
assert_eq(buffer.lines.length, 10)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "a")
assert_eq(buffer.lines.get_line(1).translate_to_string(), "b")
assert_eq(buffer.lines.get_line(2).translate_to_string(), "c")
assert_eq(buffer.lines.get_line(3).translate_to_string(), "d")
assert_eq(buffer.lines.get_line(4).translate_to_string(), "e")
assert_eq(buffer.lines.get_line(5).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(6).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(7).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(8).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(9).translate_to_string(), " ")
buffer.resize(5, 10)
assert_eq(buffer.lines.length, 10)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "abcde")
assert_eq(buffer.lines.get_line(1).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(2).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(3).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(4).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(5).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(6).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(7).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(8).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(9).translate_to_string(), " ")
func test_discards_parts_of_wrapped_lines_that_go_out_of_the_scrollback():
options_service.options.scrollback = 1
buffer.resize(10, 5)
var last_line = buffer.lines.get_line(3)
for i in range(10):
var code = "a".ord_at(0) + i
var ch = char(code)
last_line.set_cell(i, CellData.from_char_data([0, ch, 1, code]))
assert_eq(buffer.lines.length, 5)
buffer.y = 4
buffer.resize(2, 5)
assert_eq(buffer.y, 4)
assert_eq(buffer.ybase, 1)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "ab")
assert_eq(buffer.lines.get_line(1).translate_to_string(), "cd")
assert_eq(buffer.lines.get_line(2).translate_to_string(), "ef")
assert_eq(buffer.lines.get_line(3).translate_to_string(), "gh")
assert_eq(buffer.lines.get_line(4).translate_to_string(), "ij")
assert_eq(buffer.lines.get_line(5).translate_to_string(), " ")
buffer.resize(1, 5)
assert_eq(buffer.y, 4)
assert_eq(buffer.ybase, 1)
assert_eq(buffer.lines.length, 6)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "f")
assert_eq(buffer.lines.get_line(1).translate_to_string(), "g")
assert_eq(buffer.lines.get_line(2).translate_to_string(), "h")
assert_eq(buffer.lines.get_line(3).translate_to_string(), "i")
assert_eq(buffer.lines.get_line(4).translate_to_string(), "j")
assert_eq(buffer.lines.get_line(5).translate_to_string(), " ")
buffer.resize(10, 5)
assert_eq(buffer.y, 1)
assert_eq(buffer.ybase, 0)
assert_eq(buffer.lines.length, 5)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "fghij ")
assert_eq(buffer.lines.get_line(1).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(2).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(3).translate_to_string(), " ")
assert_eq(buffer.lines.get_line(4).translate_to_string(), " ")
func test_removes_the_correct_amount_of_rows_when_reflowing_larger():
# This is a regression test to ensure that successive wrapped lines that are getting
# 3+ lines removed on a reflow actually remove the right lines
buffer.resize(10, 10)
buffer.y = 2
var first_line = buffer.lines.get_line(0)
var second_line = buffer.lines.get_line(1)
for i in range(10):
var code = "a".ord_at(0) + i
var ch = char(code)
first_line.set_cell(i, CellData.from_char_data([0, ch, 1, code]))
for i in range(10):
var code = "0".ord_at(0) + i
var ch = char(code)
second_line.set_cell(i, CellData.from_char_data([0, ch, 1, code]))
assert_eq(buffer.lines.length, 10)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "abcdefghij")
assert_eq(buffer.lines.get_line(1).translate_to_string(), "0123456789")
for i in range(2, 10):
assert_eq(buffer.lines.get_line(i).translate_to_string(), " ")
buffer.resize(2, 10)
assert_eq(buffer.ybase, 1)
assert_eq(buffer.lines.length, 11)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "ab")
assert_eq(buffer.lines.get_line(1).translate_to_string(), "cd")
assert_eq(buffer.lines.get_line(2).translate_to_string(), "ef")
assert_eq(buffer.lines.get_line(3).translate_to_string(), "gh")
assert_eq(buffer.lines.get_line(4).translate_to_string(), "ij")
assert_eq(buffer.lines.get_line(5).translate_to_string(), "01")
assert_eq(buffer.lines.get_line(6).translate_to_string(), "23")
assert_eq(buffer.lines.get_line(7).translate_to_string(), "45")
assert_eq(buffer.lines.get_line(8).translate_to_string(), "67")
assert_eq(buffer.lines.get_line(9).translate_to_string(), "89")
assert_eq(buffer.lines.get_line(10).translate_to_string(), " ")
buffer.resize(10, 10)
assert_eq(buffer.ybase, 0)
assert_eq(buffer.lines.length, 10)
assert_eq(buffer.lines.get_line(0).translate_to_string(), "abcdefghij")
assert_eq(buffer.lines.get_line(1).translate_to_string(), "0123456789")
for i in range(2, 10):
assert_eq(buffer.lines.get_line(i).translate_to_string(), " ",
"line %d is incorrect" % i)
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