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functests: Add some more :echo tests which also check for regression

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Fixes #6954
This commit is contained in:
ZyX 2017-07-04 02:38:30 +03:00
parent d113d3d737
commit 480598dcda
1 changed files with 37 additions and 0 deletions
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37
test/functional/ex_cmds/echo_spec.lua
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@ -281,4 +281,41 @@ describe(':echo', function()
redir_exec('echo String({"out": d})'))
end)
end)
describe('used to represent special values', function()
local function chr(n)
return ('%c'):format(n)
end
local function ctrl(c)
return ('%c'):format(c:upper():byte() - 0x40)
end
it('displays hex as hex', function()
-- Regression: due to missing (uint8_t) cast \x80 was represented as
-- ~@<80>.
eq('<80>', funcs.String(chr(0x80)))
eq('<81>', funcs.String(chr(0x81)))
eq('<8e>', funcs.String(chr(0x8e)))
eq('<c2>', funcs.String(('«'):sub(1, 1)))
eq('«', funcs.String(('«'):sub(1, 2)))
end)
it('displays ASCII control characters using ^X notation', function()
eq('^C', funcs.String(ctrl('c')))
eq('^A', funcs.String(ctrl('a')))
eq('^F', funcs.String(ctrl('f')))
end)
it('prints CR, NL and tab as-is', function()
eq('\n', funcs.String('\n'))
eq('\r', funcs.String('\r'))
eq('\t', funcs.String('\t'))
end)
it('prints non-printable UTF-8 in <> notation', function()
-- SINGLE SHIFT TWO, unicode control
eq('<8e>', funcs.String(funcs.nr2char(0x8E)))
-- Surrogate pair: U+1F0A0 PLAYING CARD BACK is represented in UTF-16 as
-- 0xD83C 0xDCA0. This is not valid in UTF-8.
eq('<d83c>', funcs.String(funcs.nr2char(0xD83C)))
eq('<dca0>', funcs.String(funcs.nr2char(0xDCA0)))
eq('<d83c><dca0>', funcs.String(funcs.nr2char(0xD83C) .. funcs.nr2char(0xDCA0)))
end)
end)
end)