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terminal: 'scrollback'

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Closes #2637
This commit is contained in:
Justin M. Keyes
2017-02-21 15:16:48 +01:00
parent 300eca3d30
commit e7bbd35c81
15 changed files with 282 additions and 208 deletions
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91
test/functional/terminal/scrollback_spec.lua
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@@ -3,7 +3,11 @@ local helpers = require('test.functional.helpers')(after_each)
local thelpers = require('test.functional.terminal.helpers')
local clear, eq, curbuf = helpers.clear, helpers.eq, helpers.curbuf
local feed, nvim_dir, execute = helpers.feed, helpers.nvim_dir, helpers.execute
local eval = helpers.eval
local command = helpers.command
local wait = helpers.wait
local retry = helpers.retry
local curbufmeths = helpers.curbufmeths
local feed_data = thelpers.feed_data
if helpers.pending_win32(pending) then return end
@@ -20,7 +24,7 @@ describe('terminal scrollback', function()
screen:detach()
end)
describe('when the limit is crossed', function()
describe('when the limit is exceeded', function()
before_each(function()
local lines = {}
for i = 1, 30 do
@@ -359,3 +363,88 @@ describe('terminal prints more lines than the screen height and exits', function
end)
end)
describe("'scrollback' option", function()
before_each(function()
clear()
end)
local function expect_lines(expected)
local actual = eval("line('$')")
if expected ~= actual then
error('expected: '..expected..', actual: '..tostring(actual))
end
end
it('set to 0 behaves as 1', function()
local screen = thelpers.screen_setup(nil, "['sh']", 30)
curbufmeths.set_option('scrollback', 0)
feed_data('for i in $(seq 1 30); do echo "line$i"; done\n')
screen:expect('line30 ', nil, nil, nil, true)
retry(nil, nil, function() expect_lines(7) end)
screen:detach()
end)
it('deletes lines (only) if necessary', function()
local screen = thelpers.screen_setup(nil, "['sh']", 30)
curbufmeths.set_option('scrollback', 200)
-- Wait for prompt.
screen:expect('$', nil, nil, nil, true)
wait()
feed_data('for i in $(seq 1 30); do echo "line$i"; done\n')
screen:expect('line30 ', nil, nil, nil, true)
retry(nil, nil, function() expect_lines(33) end)
curbufmeths.set_option('scrollback', 10)
wait()
retry(nil, nil, function() expect_lines(16) end)
curbufmeths.set_option('scrollback', 10000)
eq(16, eval("line('$')"))
-- Terminal job data is received asynchronously, may happen before the
-- 'scrollback' option is synchronized with the internal sb_buffer.
command('sleep 100m')
feed_data('for i in $(seq 1 40); do echo "line$i"; done\n')
screen:expect('line40 ', nil, nil, nil, true)
retry(nil, nil, function() expect_lines(58) end)
-- Verify off-screen state
eq('line35', eval("getline(line('w0') - 1)"))
eq('line26', eval("getline(line('w0') - 10)"))
screen:detach()
end)
it('defaults to 1000', function()
execute('terminal')
eq(1000, curbufmeths.get_option('scrollback'))
end)
it('error if set to invalid values', function()
local status, rv = pcall(command, 'set scrollback=-2')
eq(false, status) -- assert failure
eq('E474:', string.match(rv, "E%d*:"))
status, rv = pcall(command, 'set scrollback=100001')
eq(false, status) -- assert failure
eq('E474:', string.match(rv, "E%d*:"))
end)
it('defaults to -1 on normal buffers', function()
execute('new')
eq(-1, curbufmeths.get_option('scrollback'))
end)
it('error if set on a normal buffer', function()
command('new')
execute('set scrollback=42')
feed('<CR>')
eq('E474:', string.match(eval("v:errmsg"), "E%d*:"))
end)
end)