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local helpers = require('test.functional.helpers')(after_each)
local clear = helpers.clear
local exec_lua = helpers.exec_lua
local eq = helpers.eq
local pcall_err = helpers.pcall_err
describe('xdiff bindings', function()
before_each(function()
clear()
end)
describe('can diff text', function()
before_each(function()
exec_lua[[
a1 = 'Hello\n'
b1 = 'Helli\n'
a2 = 'Hello\nbye\nfoo\n'
b2 = 'Helli\nbye\nbar\nbaz\n'
]]
end)
it('with no callback', function()
eq(
table.concat({
'@@ -1 +1 @@',
'-Hello',
'+Helli',
''
}, '\n'),
exec_lua("return vim.diff(a1, b1)")
)
eq(
table.concat({
'@@ -1 +1 @@',
'-Hello',
'+Helli',
'@@ -3 +3,2 @@',
'-foo',
'+bar',
'+baz',
''
}, '\n'),
exec_lua("return vim.diff(a2, b2)")
)
end)
it('with callback', function()
exec_lua([[on_hunk = function(sa, ca, sb, cb)
exp[#exp+1] = {sa, ca, sb, cb}
end]])
eq({{1, 1, 1, 1}}, exec_lua[[
exp = {}
assert(vim.diff(a1, b1, {on_hunk = on_hunk}) == nil)
return exp
]])
eq({{1, 1, 1, 1}, {3, 1, 3, 2}}, exec_lua[[
exp = {}
assert(vim.diff(a2, b2, {on_hunk = on_hunk}) == nil)
return exp
]])
-- gives higher precedence to on_hunk over result_type
eq({{1, 1, 1, 1}, {3, 1, 3, 2}}, exec_lua[[
exp = {}
assert(vim.diff(a2, b2, {on_hunk = on_hunk, result_type='indices'}) == nil)
return exp
]])
end)
it('with error callback', function()
exec_lua([[on_hunk = function(sa, ca, sb, cb)
error('ERROR1')
end]])
eq([[Error executing lua: [string "<nvim>"]:0: error running function on_hunk: [string "<nvim>"]:0: ERROR1]],
pcall_err(exec_lua, [[vim.diff(a1, b1, {on_hunk = on_hunk})]]))
end)
it('with hunk_lines', function()
eq({{1, 1, 1, 1}},
exec_lua([[return vim.diff(a1, b1, {result_type = 'indices'})]]))
eq({{1, 1, 1, 1}, {3, 1, 3, 2}},
exec_lua([[return vim.diff(a2, b2, {result_type = 'indices'})]]))
end)
end)
it('can handle bad args', function()
eq([[Error executing lua: [string "<nvim>"]:0: Expected at least 2 arguments]],
pcall_err(exec_lua, [[vim.diff('a')]]))
eq([[Error executing lua: [string "<nvim>"]:0: bad argument #1 to 'diff' (expected string)]],
pcall_err(exec_lua, [[vim.diff(1, 2)]]))
eq([[Error executing lua: [string "<nvim>"]:0: bad argument #3 to 'diff' (expected table)]],
pcall_err(exec_lua, [[vim.diff('a', 'b', true)]]))
eq([[Error executing lua: [string "<nvim>"]:0: unexpected key: bad_key]],
pcall_err(exec_lua, [[vim.diff('a', 'b', { bad_key = true })]]))
eq([[Error executing lua: [string "<nvim>"]:0: on_hunk is not a function]],
pcall_err(exec_lua, [[vim.diff('a', 'b', { on_hunk = true })]]))
end)
end)
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