diffs.nvim/spec/highlight_spec.lua
Barrett Ruth 3d640c207b
feat: add neogit support (#117)
## TODO

1. docs (vimdoc + readme) - this is a non-trivial feature
2. push luarocks version

## Problem

diffs.nvim only activates on `fugitive`, `git`, and `gitcommit`
filetypes.
Neogit uses its own custom filetypes (`NeogitStatus`,
`NeogitCommitView`,
`NeogitDiffView`) and doesn't set `b:git_dir`, so the plugin never
attaches
and repo root resolution fails for filetype detection within diff hunks.

## Solution

Two changes:

1. **`lua/diffs/init.lua`** — Add the three Neogit filetypes to the
default
`filetypes` list. The `FileType` autocmd in `plugin/diffs.lua` already
handles them correctly since the `is_fugitive_buffer` guard only applies
   to the `git` filetype.

2. **`lua/diffs/parser.lua`** — Add a CWD-based fallback in
`get_repo_root()`.
After the existing `b:diffs_repo_root` and `b:git_dir` checks, fall back
to
`vim.fn.getcwd()` via `git.get_repo_root()` (already cached). Without
this,
   the parser can't resolve filetypes for files in Neogit buffers.

Neogit's expanded diffs use standard unified diff format, so the parser
handles
them without modification.

Closes #110.
2026-02-14 17:12:01 -05:00

1410 lines
39 KiB
Lua

require('spec.helpers')
local highlight = require('diffs.highlight')
describe('highlight', function()
describe('highlight_hunk', function()
local ns
before_each(function()
ns = vim.api.nvim_create_namespace('diffs_test')
local normal = vim.api.nvim_get_hl(0, { name = 'Normal' })
local diff_add = vim.api.nvim_get_hl(0, { name = 'DiffAdd' })
local diff_delete = vim.api.nvim_get_hl(0, { name = 'DiffDelete' })
vim.api.nvim_set_hl(0, 'DiffsClear', { fg = normal.fg or 0xc0c0c0 })
vim.api.nvim_set_hl(0, 'DiffsAdd', { bg = diff_add.bg })
vim.api.nvim_set_hl(0, 'DiffsDelete', { bg = diff_delete.bg })
vim.api.nvim_set_hl(0, 'DiffsConflictMarker', { fg = 0x808080, bold = true })
end)
local function create_buffer(lines)
local bufnr = vim.api.nvim_create_buf(false, true)
vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
return bufnr
end
local function delete_buffer(bufnr)
if vim.api.nvim_buf_is_valid(bufnr) then
vim.api.nvim_buf_delete(bufnr, { force = true })
end
end
local function get_extmarks(bufnr)
return vim.api.nvim_buf_get_extmarks(bufnr, ns, 0, -1, { details = true })
end
local function default_opts(overrides)
local opts = {
hide_prefix = false,
highlights = {
background = false,
gutter = false,
context = { enabled = false, lines = 0 },
treesitter = {
enabled = true,
max_lines = 500,
},
vim = {
enabled = false,
max_lines = 200,
},
intra = {
enabled = false,
algorithm = 'default',
max_lines = 500,
},
priorities = {
clear = 198,
syntax = 199,
line_bg = 200,
char_bg = 201,
},
},
}
if overrides then
if overrides.highlights then
opts.highlights = vim.tbl_deep_extend('force', opts.highlights, overrides.highlights)
end
if overrides.hide_prefix ~= nil then
opts.hide_prefix = overrides.hide_prefix
end
end
return opts
end
it('applies DiffsClear extmarks to clear diff colors', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local has_clear = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group == 'DiffsClear' then
has_clear = true
break
end
end
assert.is_true(has_clear)
delete_buffer(bufnr)
end)
it('produces treesitter captures on all lines with split parsing', function()
local bufnr = create_buffer({
'@@ -1,3 +1,3 @@',
' local x = 1',
'-local y = 2',
'+local y = 3',
' return x',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '-local y = 2', '+local y = 3', ' return x' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local lines_with_ts = {}
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group and mark[4].hl_group:match('^@.*%.lua$') then
lines_with_ts[mark[2]] = true
end
end
assert.is_true(lines_with_ts[1] ~= nil)
assert.is_true(lines_with_ts[2] ~= nil)
assert.is_true(lines_with_ts[3] ~= nil)
assert.is_true(lines_with_ts[4] ~= nil)
delete_buffer(bufnr)
end)
it('skips hunks larger than max_lines', function()
local lines = { '@@ -1,100 +1,101 @@' }
local hunk_lines = {}
for i = 1, 600 do
table.insert(lines, ' line ' .. i)
table.insert(hunk_lines, ' line ' .. i)
end
local bufnr = create_buffer(lines)
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = hunk_lines,
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
assert.are.equal(0, #extmarks)
delete_buffer(bufnr)
end)
it('does nothing for nil lang and nil ft', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' some content',
'+more content',
})
local hunk = {
filename = 'test.unknown',
ft = nil,
lang = nil,
start_line = 1,
lines = { ' some content', '+more content' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
assert.are.equal(0, #extmarks)
delete_buffer(bufnr)
end)
it('highlights function keyword in header context', function()
local bufnr = create_buffer({
'@@ -5,3 +5,4 @@ function M.setup()',
' local x = 1',
'+local y = 2',
' return x',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
header_context = 'function M.setup()',
header_context_col = 18,
lines = { ' local x = 1', '+local y = 2', ' return x' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local has_keyword_function = false
for _, mark in ipairs(extmarks) do
if mark[2] == 0 and mark[4] and mark[4].hl_group then
local hl = mark[4].hl_group
if hl == '@keyword.function.lua' or hl == '@keyword.lua' then
has_keyword_function = true
break
end
end
end
assert.is_true(has_keyword_function)
delete_buffer(bufnr)
end)
it('does not highlight header when no header_context', function()
local bufnr = create_buffer({
'@@ -10,3 +10,4 @@',
' local x = 1',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local header_extmarks = 0
for _, mark in ipairs(extmarks) do
if mark[2] == 0 then
header_extmarks = header_extmarks + 1
end
end
assert.are.equal(0, header_extmarks)
delete_buffer(bufnr)
end)
it('applies overlay extmarks when hide_prefix enabled', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts({ hide_prefix = true }))
local extmarks = get_extmarks(bufnr)
local overlay_count = 0
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].virt_text_pos == 'overlay' then
overlay_count = overlay_count + 1
end
end
assert.are.equal(2, overlay_count)
delete_buffer(bufnr)
end)
it('applies DiffAdd background to + lines when background enabled', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true } })
)
local extmarks = get_extmarks(bufnr)
local has_diff_add = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].line_hl_group == 'DiffsAdd' then
has_diff_add = true
break
end
end
assert.is_true(has_diff_add)
delete_buffer(bufnr)
end)
it('applies DiffDelete background to - lines when background enabled', function()
local bufnr = create_buffer({
'@@ -1,2 +1,1 @@',
' local x = 1',
'-local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '-local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true } })
)
local extmarks = get_extmarks(bufnr)
local has_diff_delete = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].line_hl_group == 'DiffsDelete' then
has_diff_delete = true
break
end
end
assert.is_true(has_diff_delete)
delete_buffer(bufnr)
end)
it('applies number_hl_group when gutter enabled', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true, gutter = true } })
)
local extmarks = get_extmarks(bufnr)
local has_number_hl = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].number_hl_group then
has_number_hl = true
break
end
end
assert.is_true(has_number_hl)
delete_buffer(bufnr)
end)
it('still applies background when treesitter disabled', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { treesitter = { enabled = false }, background = true } })
)
local extmarks = get_extmarks(bufnr)
local has_diff_add = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].line_hl_group == 'DiffsAdd' then
has_diff_add = true
break
end
end
assert.is_true(has_diff_add)
delete_buffer(bufnr)
end)
it('applies vim syntax extmarks when vim.enabled and no TS parser', function()
local orig_synID = vim.fn.synID
local orig_synIDtrans = vim.fn.synIDtrans
local orig_synIDattr = vim.fn.synIDattr
vim.fn.synID = function(_line, _col, _trans)
return 1
end
vim.fn.synIDtrans = function(id)
return id
end
vim.fn.synIDattr = function(_id, _what)
return 'Identifier'
end
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
ft = 'abap',
lang = nil,
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { vim = { enabled = true } } })
)
vim.fn.synID = orig_synID
vim.fn.synIDtrans = orig_synIDtrans
vim.fn.synIDattr = orig_synIDattr
local extmarks = get_extmarks(bufnr)
local has_syntax_hl = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group and mark[4].hl_group ~= 'DiffsClear' then
has_syntax_hl = true
break
end
end
assert.is_true(has_syntax_hl)
delete_buffer(bufnr)
end)
it('respects vim.max_lines', function()
local lines = { '@@ -1,100 +1,101 @@' }
local hunk_lines = {}
for i = 1, 250 do
table.insert(lines, ' line ' .. i)
table.insert(hunk_lines, ' line ' .. i)
end
local bufnr = create_buffer(lines)
local hunk = {
filename = 'test.lua',
ft = 'abap',
lang = nil,
start_line = 1,
lines = hunk_lines,
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { vim = { enabled = true, max_lines = 200 } } })
)
local extmarks = get_extmarks(bufnr)
assert.are.equal(0, #extmarks)
delete_buffer(bufnr)
end)
it('applies background for vim fallback hunks', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
ft = 'abap',
lang = nil,
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { vim = { enabled = true }, background = true } })
)
local extmarks = get_extmarks(bufnr)
local has_diff_add = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].line_hl_group == 'DiffsAdd' then
has_diff_add = true
break
end
end
assert.is_true(has_diff_add)
delete_buffer(bufnr)
end)
it('applies DiffsClear blanking for vim fallback hunks', function()
local orig_synID = vim.fn.synID
local orig_synIDtrans = vim.fn.synIDtrans
local orig_synIDattr = vim.fn.synIDattr
vim.fn.synID = function(_line, _col, _trans)
return 1
end
vim.fn.synIDtrans = function(id)
return id
end
vim.fn.synIDattr = function(_id, _what)
return 'Identifier'
end
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
ft = 'abap',
lang = nil,
start_line = 1,
lines = { ' local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { vim = { enabled = true } } })
)
vim.fn.synID = orig_synID
vim.fn.synIDtrans = orig_synIDtrans
vim.fn.synIDattr = orig_synIDattr
local extmarks = get_extmarks(bufnr)
local has_clear = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group == 'DiffsClear' then
has_clear = true
break
end
end
assert.is_true(has_clear)
delete_buffer(bufnr)
end)
it('uses line_hl_group for line backgrounds', function()
local bufnr = create_buffer({
'@@ -1,2 +1,1 @@',
'-local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { '-local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true } })
)
local extmarks = get_extmarks(bufnr)
local found = false
for _, mark in ipairs(extmarks) do
local d = mark[4]
if d and (d.line_hl_group == 'DiffsAdd' or d.line_hl_group == 'DiffsDelete') then
found = true
assert.is_nil(d.hl_eol)
end
end
assert.is_true(found)
delete_buffer(bufnr)
end)
it('line_hl_group background extmarks are single-line', function()
local bufnr = create_buffer({
'@@ -1,2 +1,1 @@',
'-local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { '-local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true } })
)
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
local d = mark[4]
if d and (d.line_hl_group == 'DiffsAdd' or d.line_hl_group == 'DiffsDelete') then
assert.is_nil(d.end_row)
end
end
delete_buffer(bufnr)
end)
it('number_hl_group does not bleed to adjacent lines', function()
local bufnr = create_buffer({
'@@ -1,3 +1,3 @@',
' local a = 0',
'-local x = 1',
'+local y = 2',
' local b = 3',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local a = 0', '-local x = 1', '+local y = 2', ' local b = 3' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true, gutter = true } })
)
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
local d = mark[4]
if d and d.number_hl_group then
local start_row = mark[2]
local end_row = d.end_row or start_row
assert.are.equal(start_row, end_row)
end
end
delete_buffer(bufnr)
end)
it('creates char-level extmarks for changed characters', function()
vim.api.nvim_set_hl(0, 'DiffsAddText', { bg = 0x00FF00 })
vim.api.nvim_set_hl(0, 'DiffsDeleteText', { bg = 0xFF0000 })
local bufnr = create_buffer({
'@@ -1,2 +1,2 @@',
'-local x = 1',
'+local x = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { '-local x = 1', '+local x = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({
highlights = { intra = { enabled = true, algorithm = 'default', max_lines = 500 } },
})
)
local extmarks = get_extmarks(bufnr)
local add_text_marks = {}
local del_text_marks = {}
for _, mark in ipairs(extmarks) do
local d = mark[4]
if d and d.hl_group == 'DiffsAddText' then
table.insert(add_text_marks, mark)
end
if d and d.hl_group == 'DiffsDeleteText' then
table.insert(del_text_marks, mark)
end
end
assert.is_true(#add_text_marks > 0)
assert.is_true(#del_text_marks > 0)
delete_buffer(bufnr)
end)
it('does not create char-level extmarks for pure additions', function()
vim.api.nvim_set_hl(0, 'DiffsAddText', { bg = 0x00FF00 })
local bufnr = create_buffer({
'@@ -1,0 +1,2 @@',
'+local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { '+local x = 1', '+local y = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({
highlights = { intra = { enabled = true, algorithm = 'default', max_lines = 500 } },
})
)
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
local d = mark[4]
assert.is_not_equal('DiffsAddText', d and d.hl_group)
assert.is_not_equal('DiffsDeleteText', d and d.hl_group)
end
delete_buffer(bufnr)
end)
it('enforces priority order: DiffsClear < syntax < line bg < char bg', function()
vim.api.nvim_set_hl(0, 'DiffsAddText', { bg = 0x00FF00 })
vim.api.nvim_set_hl(0, 'DiffsDeleteText', { bg = 0xFF0000 })
local bufnr = create_buffer({
'@@ -1,2 +1,2 @@',
'-local x = 1',
'+local x = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { '-local x = 1', '+local x = 2' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({
highlights = {
background = true,
intra = { enabled = true, algorithm = 'default', max_lines = 500 },
},
})
)
local extmarks = get_extmarks(bufnr)
local priorities = { clear = {}, line_bg = {}, syntax = {}, char_bg = {} }
for _, mark in ipairs(extmarks) do
local d = mark[4]
if d then
if d.hl_group == 'DiffsClear' then
table.insert(priorities.clear, d.priority)
elseif d.line_hl_group == 'DiffsAdd' or d.line_hl_group == 'DiffsDelete' then
table.insert(priorities.line_bg, d.priority)
elseif d.hl_group == 'DiffsAddText' or d.hl_group == 'DiffsDeleteText' then
table.insert(priorities.char_bg, d.priority)
elseif d.hl_group and d.hl_group:match('^@.*%.lua$') then
table.insert(priorities.syntax, d.priority)
end
end
end
assert.is_true(#priorities.clear > 0)
assert.is_true(#priorities.line_bg > 0)
assert.is_true(#priorities.syntax > 0)
assert.is_true(#priorities.char_bg > 0)
local max_clear = math.max(unpack(priorities.clear))
local min_line_bg = math.min(unpack(priorities.line_bg))
local min_syntax = math.min(unpack(priorities.syntax))
local min_char_bg = math.min(unpack(priorities.char_bg))
assert.is_true(max_clear < min_syntax)
assert.is_true(min_syntax < min_line_bg)
assert.is_true(min_line_bg < min_char_bg)
delete_buffer(bufnr)
end)
it('includes captures from both base and injected languages', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+vim.cmd([[ echo 1 ]])',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+vim.cmd([[ echo 1 ]])' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local has_lua = false
local has_vim = false
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group then
if mark[4].hl_group:match('^@.*%.lua$') then
has_lua = true
end
if mark[4].hl_group:match('^@.*%.vim$') then
has_vim = true
end
end
end
assert.is_true(has_lua)
assert.is_true(has_vim)
delete_buffer(bufnr)
end)
it('classifies all combined diff prefix types for background', function()
local bufnr = create_buffer({
'@@@ -1,5 -1,5 +1,9 @@@',
' local M = {}',
'++<<<<<<< HEAD',
' + return 1',
'+ local greeting = "hi"',
'++=======',
'+ return 2',
'++>>>>>>> feature',
' end',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
prefix_width = 2,
lines = {
' local M = {}',
'++<<<<<<< HEAD',
' + return 1',
'+ local greeting = "hi"',
'++=======',
'+ return 2',
'++>>>>>>> feature',
' end',
},
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true } })
)
local extmarks = get_extmarks(bufnr)
local line_bgs = {}
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].line_hl_group then
line_bgs[mark[2]] = mark[4].line_hl_group
end
end
assert.is_nil(line_bgs[1])
assert.are.equal('DiffsAdd', line_bgs[2])
assert.are.equal('DiffsAdd', line_bgs[3])
assert.are.equal('DiffsAdd', line_bgs[4])
assert.are.equal('DiffsAdd', line_bgs[5])
assert.are.equal('DiffsAdd', line_bgs[6])
assert.are.equal('DiffsAdd', line_bgs[7])
assert.is_nil(line_bgs[8])
delete_buffer(bufnr)
end)
it('conceals full 2-char prefix for all combined diff line types', function()
local bufnr = create_buffer({
'@@@ -1,3 -1,3 +1,5 @@@',
' local M = {}',
'++<<<<<<< HEAD',
' + return 1',
'+ local x = 2',
' end',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
prefix_width = 2,
lines = {
' local M = {}',
'++<<<<<<< HEAD',
' + return 1',
'+ local x = 2',
' end',
},
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts({ hide_prefix = true }))
local extmarks = get_extmarks(bufnr)
local overlays = {}
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].virt_text_pos == 'overlay' then
overlays[mark[2]] = mark[4].virt_text[1][1]
end
end
assert.are.equal(5, vim.tbl_count(overlays))
for _, text in pairs(overlays) do
assert.are.equal(' ', text)
end
delete_buffer(bufnr)
end)
it('places treesitter captures at col_offset 2 for combined diffs', function()
local bufnr = create_buffer({
'@@@ -1,2 -1,2 +1,2 @@@',
' local x = 1',
' +local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
prefix_width = 2,
lines = { ' local x = 1', ' +local y = 2' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local ts_marks = {}
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group and mark[4].hl_group:match('^@.*%.lua$') then
table.insert(ts_marks, mark)
end
end
assert.is_true(#ts_marks > 0)
for _, mark in ipairs(ts_marks) do
assert.is_true(mark[3] >= 2)
end
delete_buffer(bufnr)
end)
it('applies DiffsClear starting at col 2 for combined diffs', function()
local bufnr = create_buffer({
'@@@ -1,1 -1,1 +1,2 @@@',
' local x = 1',
' +local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
prefix_width = 2,
lines = { ' local x = 1', ' +local y = 2' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group == 'DiffsClear' then
assert.are.equal(2, mark[3])
end
end
delete_buffer(bufnr)
end)
it('skips intra-line diffing for combined diffs', function()
vim.api.nvim_set_hl(0, 'DiffsAddText', { bg = 0x00FF00 })
vim.api.nvim_set_hl(0, 'DiffsDeleteText', { bg = 0xFF0000 })
local bufnr = create_buffer({
'@@@ -1,2 -1,2 +1,3 @@@',
' local x = 1',
' +local y = 2',
'+ local y = 3',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
prefix_width = 2,
lines = { ' local x = 1', ' +local y = 2', '+ local y = 3' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({
highlights = { intra = { enabled = true, algorithm = 'default', max_lines = 500 } },
})
)
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
local d = mark[4]
assert.is_not_equal('DiffsAddText', d and d.hl_group)
assert.is_not_equal('DiffsDeleteText', d and d.hl_group)
end
delete_buffer(bufnr)
end)
it('applies DiffsConflictMarker text on markers with DiffsAdd bg', function()
local bufnr = create_buffer({
'@@@ -1,5 -1,5 +1,9 @@@',
' local M = {}',
'++<<<<<<< HEAD',
'+ local x = 1',
'++||||||| base',
'++=======',
' +local y = 2',
'++>>>>>>> feature',
' return M',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
prefix_width = 2,
lines = {
' local M = {}',
'++<<<<<<< HEAD',
'+ local x = 1',
'++||||||| base',
'++=======',
' +local y = 2',
'++>>>>>>> feature',
' return M',
},
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true, gutter = true } })
)
local extmarks = get_extmarks(bufnr)
local line_bgs = {}
local gutter_hls = {}
local marker_text = {}
for _, mark in ipairs(extmarks) do
local d = mark[4]
if d and d.line_hl_group then
line_bgs[mark[2]] = d.line_hl_group
end
if d and d.number_hl_group then
gutter_hls[mark[2]] = d.number_hl_group
end
if d and d.hl_group == 'DiffsConflictMarker' then
marker_text[mark[2]] = true
end
end
assert.is_nil(line_bgs[1])
assert.are.equal('DiffsAdd', line_bgs[2])
assert.are.equal('DiffsAdd', line_bgs[3])
assert.are.equal('DiffsAdd', line_bgs[4])
assert.are.equal('DiffsAdd', line_bgs[5])
assert.are.equal('DiffsAdd', line_bgs[6])
assert.are.equal('DiffsAdd', line_bgs[7])
assert.is_nil(line_bgs[8])
assert.is_nil(gutter_hls[1])
assert.are.equal('DiffsAddNr', gutter_hls[2])
assert.are.equal('DiffsAddNr', gutter_hls[3])
assert.are.equal('DiffsAddNr', gutter_hls[4])
assert.are.equal('DiffsAddNr', gutter_hls[5])
assert.are.equal('DiffsAddNr', gutter_hls[6])
assert.are.equal('DiffsAddNr', gutter_hls[7])
assert.is_nil(gutter_hls[8])
assert.is_true(marker_text[2] ~= nil)
assert.is_nil(marker_text[3])
assert.is_true(marker_text[4] ~= nil)
assert.is_true(marker_text[5] ~= nil)
assert.is_nil(marker_text[6])
assert.is_true(marker_text[7] ~= nil)
delete_buffer(bufnr)
end)
it('does not apply DiffsConflictMarker in unified diffs', function()
local bufnr = create_buffer({
'@@ -1,1 +1,4 @@',
' local M = {}',
'+<<<<<<< HEAD',
'+local x = 1',
'+=======',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local M = {}', '+<<<<<<< HEAD', '+local x = 1', '+=======' },
}
highlight.highlight_hunk(
bufnr,
ns,
hunk,
default_opts({ highlights = { background = true } })
)
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
local d = mark[4]
assert.is_not_equal('DiffsConflictMarker', d and d.hl_group)
end
delete_buffer(bufnr)
end)
it('filters @spell and @nospell captures from injections', function()
local bufnr = create_buffer({
'@@ -1,1 +1,2 @@',
' local x = 1',
'+vim.cmd([[ echo 1 ]])',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 1,
lines = { ' local x = 1', '+vim.cmd([[ echo 1 ]])' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group then
assert.is_falsy(mark[4].hl_group:match('@spell'))
assert.is_falsy(mark[4].hl_group:match('@nospell'))
end
end
delete_buffer(bufnr)
end)
end)
describe('diff header highlighting', function()
local ns
before_each(function()
ns = vim.api.nvim_create_namespace('diffs_test_header')
end)
local function create_buffer(lines)
local bufnr = vim.api.nvim_create_buf(false, true)
vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
return bufnr
end
local function delete_buffer(bufnr)
if vim.api.nvim_buf_is_valid(bufnr) then
vim.api.nvim_buf_delete(bufnr, { force = true })
end
end
local function get_extmarks(bufnr)
return vim.api.nvim_buf_get_extmarks(bufnr, ns, 0, -1, { details = true })
end
local function default_opts()
return {
hide_prefix = false,
highlights = {
background = false,
gutter = false,
context = { enabled = false, lines = 0 },
treesitter = { enabled = true, max_lines = 500 },
vim = { enabled = false, max_lines = 200 },
priorities = { clear = 198, syntax = 199, line_bg = 200, char_bg = 201 },
},
}
end
it('applies treesitter extmarks to diff header lines', function()
local bufnr = create_buffer({
'diff --git a/parser.lua b/parser.lua',
'index 3e8afa0..018159c 100644',
'--- a/parser.lua',
'+++ b/parser.lua',
'@@ -1,2 +1,3 @@',
' local M = {}',
'+local x = 1',
})
local hunk = {
filename = 'parser.lua',
lang = 'lua',
start_line = 5,
lines = { ' local M = {}', '+local x = 1' },
header_start_line = 1,
header_lines = {
'diff --git a/parser.lua b/parser.lua',
'index 3e8afa0..018159c 100644',
'--- a/parser.lua',
'+++ b/parser.lua',
},
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local header_extmarks = {}
for _, mark in ipairs(extmarks) do
if mark[2] < 4 and mark[4] and mark[4].hl_group then
table.insert(header_extmarks, mark)
end
end
assert.is_true(#header_extmarks > 0)
local has_function_hl = false
local has_keyword_hl = false
for _, mark in ipairs(header_extmarks) do
local hl = mark[4].hl_group
if hl == '@function' or hl == '@function.diff' then
has_function_hl = true
end
if hl == '@keyword' or hl == '@keyword.diff' then
has_keyword_hl = true
end
end
assert.is_true(has_function_hl or has_keyword_hl)
delete_buffer(bufnr)
end)
it('does not apply header highlights when header_lines missing', function()
local bufnr = create_buffer({
'@@ -1,2 +1,3 @@',
' local M = {}',
'+local x = 1',
})
local hunk = {
filename = 'parser.lua',
lang = 'lua',
start_line = 1,
lines = { ' local M = {}', '+local x = 1' },
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local header_extmarks = 0
for _, mark in ipairs(extmarks) do
if mark[2] < 0 and mark[4] and mark[4].hl_group then
header_extmarks = header_extmarks + 1
end
end
assert.are.equal(0, header_extmarks)
delete_buffer(bufnr)
end)
end)
describe('extmark priority', function()
local ns
before_each(function()
ns = vim.api.nvim_create_namespace('diffs_test_priority')
end)
local function create_buffer(lines)
local bufnr = vim.api.nvim_create_buf(false, true)
vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
return bufnr
end
local function delete_buffer(bufnr)
if vim.api.nvim_buf_is_valid(bufnr) then
vim.api.nvim_buf_delete(bufnr, { force = true })
end
end
local function get_extmarks(bufnr)
return vim.api.nvim_buf_get_extmarks(bufnr, ns, 0, -1, { details = true })
end
local function default_opts()
return {
hide_prefix = false,
highlights = {
background = false,
gutter = false,
context = { enabled = false, lines = 0 },
treesitter = { enabled = true, max_lines = 500 },
vim = { enabled = false, max_lines = 200 },
priorities = { clear = 198, syntax = 199, line_bg = 200, char_bg = 201 },
},
}
end
it('uses treesitter priority for diff language', function()
local bufnr = create_buffer({
'diff --git a/test.lua b/test.lua',
'--- a/test.lua',
'+++ b/test.lua',
'@@ -1,1 +1,2 @@',
' local x = 1',
'+local y = 2',
})
local hunk = {
filename = 'test.lua',
lang = 'lua',
start_line = 5,
lines = { ' local x = 1', '+local y = 2' },
header_start_line = 1,
header_lines = {
'diff --git a/test.lua b/test.lua',
'--- a/test.lua',
'+++ b/test.lua',
},
}
highlight.highlight_hunk(bufnr, ns, hunk, default_opts())
local extmarks = get_extmarks(bufnr)
local diff_extmark_priorities = {}
for _, mark in ipairs(extmarks) do
if mark[4] and mark[4].hl_group and mark[4].hl_group:match('^@.*%.diff$') then
table.insert(diff_extmark_priorities, mark[4].priority)
end
end
assert.is_true(#diff_extmark_priorities > 0)
for _, priority in ipairs(diff_extmark_priorities) do
assert.is_true(priority < 199)
end
delete_buffer(bufnr)
end)
end)
describe('coalesce_syntax_spans', function()
it('coalesces adjacent chars with same hl group', function()
local function query_fn(_line, _col)
return 1, 'Keyword'
end
local spans = highlight.coalesce_syntax_spans(query_fn, { 'hello' })
assert.are.equal(1, #spans)
assert.are.equal(1, spans[1].col_start)
assert.are.equal(6, spans[1].col_end)
assert.are.equal('Keyword', spans[1].hl_name)
end)
it('splits spans at hl group boundaries', function()
local function query_fn(_line, col)
if col <= 3 then
return 1, 'Keyword'
end
return 2, 'String'
end
local spans = highlight.coalesce_syntax_spans(query_fn, { 'abcdef' })
assert.are.equal(2, #spans)
assert.are.equal('Keyword', spans[1].hl_name)
assert.are.equal(1, spans[1].col_start)
assert.are.equal(4, spans[1].col_end)
assert.are.equal('String', spans[2].hl_name)
assert.are.equal(4, spans[2].col_start)
assert.are.equal(7, spans[2].col_end)
end)
it('skips syn_id 0 gaps', function()
local function query_fn(_line, col)
if col == 2 or col == 3 then
return 0, ''
end
return 1, 'Identifier'
end
local spans = highlight.coalesce_syntax_spans(query_fn, { 'abcd' })
assert.are.equal(2, #spans)
assert.are.equal(1, spans[1].col_start)
assert.are.equal(2, spans[1].col_end)
assert.are.equal(4, spans[2].col_start)
assert.are.equal(5, spans[2].col_end)
end)
it('skips empty hl_name spans', function()
local function query_fn(_line, _col)
return 1, ''
end
local spans = highlight.coalesce_syntax_spans(query_fn, { 'abc' })
assert.are.equal(0, #spans)
end)
end)
end)