Files
fzf/test/test_filter.rb
Junegunn Choi b9804f5873 Add change-header-lines action to dynamically change --header-lines
All input lines now enter the chunklist with sequential indices, and
header lines are excluded from matching via Pattern.startIndex and
PassMerger offset. This allows the number of header lines to be changed
at runtime with change-header-lines(N), transform-header-lines, and
bg-transform-header-lines actions.

- Remove EvtHeader event; header items are read directly from chunks
- Add startIndex to Pattern and PassMerger for skipping header items
- Add targetIndex field to Terminal for cursor repositioning across
  header-lines changes

Close #4659
2026-02-23 01:48:03 +09:00

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# frozen_string_literal: true
require_relative 'lib/common'
# Non-interactive tests
class TestFilter < TestBase
def test_default_extended
assert_equal '100', `seq 100 | #{FZF} -f "1 00$"`.chomp
assert_equal '', `seq 100 | #{FZF} -f "1 00$" +x`.chomp
end
def test_exact
assert_equal 4, `seq 123 | #{FZF} -f 13`.lines.length
assert_equal 2, `seq 123 | #{FZF} -f 13 -e`.lines.length
assert_equal 4, `seq 123 | #{FZF} -f 13 +e`.lines.length
end
def test_or_operator
assert_equal %w[1 5 10], `seq 10 | #{FZF} -f "1 | 5"`.lines(chomp: true)
assert_equal %w[1 10 2 3 4 5 6 7 8 9],
`seq 10 | #{FZF} -f '1 | !1'`.lines(chomp: true)
end
def test_smart_case_for_each_term
assert_equal 1, `echo Foo bar | #{FZF} -x -f "foo Fbar" | wc -l`.to_i
end
def test_filter_exitstatus
# filter / streaming filter
['', '--no-sort'].each do |opts|
assert_includes `echo foo | #{FZF} -f foo #{opts}`, 'foo'
assert_equal 0, $CHILD_STATUS.exitstatus
assert_empty `echo foo | #{FZF} -f bar #{opts}`
assert_equal 1, $CHILD_STATUS.exitstatus
end
end
def test_long_line
data = '.' * 256 * 1024
File.open(tempname, 'w') do |f|
f << data
end
assert_equal data, `#{FZF} -f . < #{tempname}`.chomp
end
def test_read0
lines = `find .`.lines(chomp: true)
assert_equal lines.last, `find . | #{FZF} -e -f "^#{lines.last}$"`.chomp
assert_equal \
lines.last,
`find . -print0 | #{FZF} --read0 -e -f "^#{lines.last}$"`.chomp
end
def test_nth_suffix_match
assert_equal \
'foo,bar,baz',
`echo foo,bar,baz | #{FZF} -d, -f'bar$' -n2`.chomp
end
def test_with_nth_basic
writelines(['hello world ', 'byebye'])
assert_equal \
'hello world ',
`#{FZF} -f"^he hehe" -x -n 2.. --with-nth 2,1,1 < #{tempname}`.chomp
end
def test_with_nth_template
writelines(['hello world ', 'byebye'])
assert_equal \
'hello world ',
`#{FZF} -f"^he he.he." -x -n 2.. --with-nth '{2} {1}. {1}.' < #{tempname}`.chomp
end
def test_with_nth_ansi
writelines(["\x1b[33mhello \x1b[34;1mworld\x1b[m ", 'byebye'])
assert_equal \
'hello world ',
`#{FZF} -f"^he hehe" -x -n 2.. --with-nth 2,1,1 --ansi < #{tempname}`.chomp
end
def test_with_nth_no_ansi
src = "\x1b[33mhello \x1b[34;1mworld\x1b[m "
writelines([src, 'byebye'])
assert_equal \
src,
`#{FZF} -fhehe -x -n 2.. --with-nth 2,1,1 --no-ansi < #{tempname}`.chomp
end
def test_escaped_meta_characters
input = [
'foo^bar',
'foo$bar',
'foo!bar',
"foo'bar",
'foo bar',
'bar foo'
]
writelines(input)
assert_equal input.length, `#{FZF} -f'foo bar' < #{tempname}`.lines.length
assert_equal input.length - 1, `#{FZF} -f'^foo bar$' < #{tempname}`.lines.length
assert_equal ['foo bar'], `#{FZF} -f'foo\\ bar' < #{tempname}`.lines(chomp: true)
assert_equal ['foo bar'], `#{FZF} -f'^foo\\ bar$' < #{tempname}`.lines(chomp: true)
assert_equal input.length - 1, `#{FZF} -f'!^foo\\ bar$' < #{tempname}`.lines.length
end
def test_normalized_match
echoes = '(echo a; echo á; echo A; echo Á;)'
assert_equal %w[a á A Á], `#{echoes} | #{FZF} -f a`.lines.map(&:chomp)
assert_equal %w[á Á], `#{echoes} | #{FZF} -f á`.lines.map(&:chomp)
assert_equal %w[A Á], `#{echoes} | #{FZF} -f A`.lines.map(&:chomp)
assert_equal %w[Á], `#{echoes} | #{FZF} -f Á`.lines.map(&:chomp)
end
def test_unicode_case
writelines(%w[строКА1 СТРОКА2 строка3 Строка4])
assert_equal %w[СТРОКА2 Строка4], `#{FZF} -fС < #{tempname}`.lines(chomp: true)
assert_equal %w[строКА1 СТРОКА2 строка3 Строка4], `#{FZF} -fс < #{tempname}`.lines(chomp: true)
end
def test_tiebreak
input = %w[
--foobar--------
-----foobar---
----foobar--
-------foobar-
]
writelines(input)
assert_equal input, `#{FZF} -ffoobar --tiebreak=index < #{tempname}`.lines(chomp: true)
by_length = %w[
----foobar--
-----foobar---
-------foobar-
--foobar--------
]
assert_equal by_length, `#{FZF} -ffoobar < #{tempname}`.lines(chomp: true)
assert_equal by_length, `#{FZF} -ffoobar --tiebreak=length < #{tempname}`.lines(chomp: true)
by_begin = %w[
--foobar--------
----foobar--
-----foobar---
-------foobar-
]
assert_equal by_begin, `#{FZF} -ffoobar --tiebreak=begin < #{tempname}`.lines(chomp: true)
assert_equal by_begin, `#{FZF} -f"!z foobar" -x --tiebreak begin < #{tempname}`.lines(chomp: true)
assert_equal %w[
-------foobar-
----foobar--
-----foobar---
--foobar--------
], `#{FZF} -ffoobar --tiebreak end < #{tempname}`.lines(chomp: true)
assert_equal input, `#{FZF} -f"!z" -x --tiebreak end < #{tempname}`.lines(chomp: true)
end
def test_tiebreak_index_begin
writelines([
'xoxxxxxoxx',
'xoxxxxxox',
'xxoxxxoxx',
'xxxoxoxxx',
'xxxxoxox',
' xxoxoxxx'
])
assert_equal [
'xxxxoxox',
' xxoxoxxx',
'xxxoxoxxx',
'xxoxxxoxx',
'xoxxxxxox',
'xoxxxxxoxx'
], `#{FZF} -foo < #{tempname}`.lines(chomp: true)
assert_equal [
'xxxoxoxxx',
'xxxxoxox',
' xxoxoxxx',
'xxoxxxoxx',
'xoxxxxxoxx',
'xoxxxxxox'
], `#{FZF} -foo --tiebreak=index < #{tempname}`.lines(chomp: true)
# Note that --tiebreak=begin is now based on the first occurrence of the
# first character on the pattern
assert_equal [
' xxoxoxxx',
'xxxoxoxxx',
'xxxxoxox',
'xxoxxxoxx',
'xoxxxxxoxx',
'xoxxxxxox'
], `#{FZF} -foo --tiebreak=begin < #{tempname}`.lines(chomp: true)
assert_equal [
' xxoxoxxx',
'xxxoxoxxx',
'xxxxoxox',
'xxoxxxoxx',
'xoxxxxxox',
'xoxxxxxoxx'
], `#{FZF} -foo --tiebreak=begin,length < #{tempname}`.lines(chomp: true)
end
def test_tiebreak_begin_algo_v2
writelines(['baz foo bar',
'foo bar baz'])
assert_equal [
'foo bar baz',
'baz foo bar'
], `#{FZF} -fbar --tiebreak=begin --algo=v2 < #{tempname}`.lines(chomp: true)
end
def test_tiebreak_end
writelines(['xoxxxxxxxx',
'xxoxxxxxxx',
'xxxoxxxxxx',
'xxxxoxxxx',
'xxxxxoxxx',
' xxxxoxxx'])
assert_equal [
' xxxxoxxx',
'xxxxoxxxx',
'xxxxxoxxx',
'xoxxxxxxxx',
'xxoxxxxxxx',
'xxxoxxxxxx'
], `#{FZF} -fo < #{tempname}`.lines(chomp: true)
assert_equal [
'xxxxxoxxx',
' xxxxoxxx',
'xxxxoxxxx',
'xxxoxxxxxx',
'xxoxxxxxxx',
'xoxxxxxxxx'
], `#{FZF} -fo --tiebreak=end < #{tempname}`.lines(chomp: true)
assert_equal [
'xxxxxoxxx',
' xxxxoxxx',
'xxxxoxxxx',
'xxxoxxxxxx',
'xxoxxxxxxx',
'xoxxxxxxxx'
], `#{FZF} -fo --tiebreak=end,length,begin < #{tempname}`.lines(chomp: true)
writelines(['/bar/baz', '/foo/bar/baz'])
assert_equal [
'/foo/bar/baz',
'/bar/baz'
], `#{FZF} -fbaz --tiebreak=end < #{tempname}`.lines(chomp: true)
end
def test_tiebreak_length_with_nth
input = %w[
1:hell
123:hello
12345:he
1234567:h
]
writelines(input)
output = %w[
1:hell
12345:he
123:hello
1234567:h
]
assert_equal output, `#{FZF} -fh < #{tempname}`.lines(chomp: true)
# Since 0.16.8, --nth doesn't affect --tiebreak
assert_equal output, `#{FZF} -fh -n2 -d: < #{tempname}`.lines(chomp: true)
end
def test_tiebreak_chunk
writelines(['1 foobarbaz ba',
'2 foobar baz',
'3 foo barbaz'])
assert_equal [
'3 foo barbaz',
'2 foobar baz',
'1 foobarbaz ba'
], `#{FZF} -fo --tiebreak=chunk < #{tempname}`.lines(chomp: true)
assert_equal [
'1 foobarbaz ba',
'2 foobar baz',
'3 foo barbaz'
], `#{FZF} -fba --tiebreak=chunk < #{tempname}`.lines(chomp: true)
assert_equal [
'3 foo barbaz'
], `#{FZF} -f'!foobar' --tiebreak=chunk < #{tempname}`.lines(chomp: true)
end
def test_boundary_match
# Underscore boundaries should be ranked lower
{
default: [' xyz '] + %w[/xyz/ [xyz] -xyz- -xyz_ _xyz- _xyz_],
path: ['/xyz/', ' xyz '] + %w[[xyz] -xyz- -xyz_ _xyz- _xyz_],
history: ['[xyz]', '-xyz-', ' xyz '] + %w[/xyz/ -xyz_ _xyz- _xyz_]
}.each do |scheme, expected|
result = `printf -- 'xxyzx\n-xxyz\nxyzx-\n_xyz_\n_xyz-\n-xyz_\n[xyz]\n-xyz-\n xyz \n/xyz/\n' | #{FZF} -f"'xyz'" --scheme=#{scheme}`.lines(chomp: true)
assert_equal expected, result
end
end
def test_accept_nth
# Single field selection
assert_equal 'three', `echo 'one two three' | #{FZF} -d' ' --with-nth 1 --accept-nth -1 -f one`.chomp
# Multiple field selection
writelines(['ID001:John:Developer', 'ID002:Jane:Manager', 'ID003:Bob:Designer'])
assert_equal 'ID001', `#{FZF} -d: --with-nth 2 --accept-nth 1 -f John < #{tempname}`.chomp
assert_equal 'ID002:Manager', `#{FZF} -d: --with-nth 2 --accept-nth 1,3 -f Jane < #{tempname}`.chomp
# Test with different delimiters
writelines(['emp001 Alice Engineering', 'emp002 Bob Marketing'])
assert_equal 'emp001', `#{FZF} -d' ' --with-nth 2 --accept-nth 1 -f Alice < #{tempname}`.chomp
end
def test_header_lines_filter
assert_equal %w[4 5 6 7 8 9 10],
`seq 10 | #{FZF} --header-lines 3 -f ""`.lines(chomp: true)
assert_equal %w[5],
`seq 10 | #{FZF} --header-lines 3 -f 5`.lines(chomp: true)
# Header items should not be matched
assert_empty `seq 10 | #{FZF} --header-lines 3 -f "^1$"`.lines(chomp: true)
end
def test_header_lines_filter_with_nth
writelines(%w[a:1 b:2 c:3 d:4 e:5])
assert_equal %w[c:3 d:4 e:5],
`#{FZF} --header-lines 2 -d: --with-nth 2 -f "" < #{tempname}`.lines(chomp: true)
assert_equal %w[d:4],
`#{FZF} --header-lines 2 -d: --with-nth 2 -f 4 < #{tempname}`.lines(chomp: true)
end
def test_header_lines_all_headers
# When all lines are header lines, no results
assert_empty `seq 3 | #{FZF} --header-lines 10 -f ""`.chomp
assert_equal 1, $CHILD_STATUS.exitstatus
end
end