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wrap_test.go
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package ansi_test
import (
"testing"
"github.com/charmbracelet/x/ansi"
)
var cases = []struct {
name string
input string
limit int
expected string
preserveSpace bool
}{
{"empty string", "", 0, "", true},
{"passthrough", "foobar\n ", 0, "foobar\n ", true},
{"pass", "foo", 4, "foo", true},
{"simple", "foobarfoo", 4, "foob\narfo\no", true},
{"lf", "f\no\nobar", 3, "f\no\noba\nr", true},
{"lf_space", "foo bar\n baz", 3, "foo\n ba\nr\n b\naz", true},
{"tab", "foo\tbar", 3, "foo\n\tba\nr", true},
{"unicode_space", "foo\xc2\xa0bar", 3, "foo\nbar", false},
{"style_nochange", "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", 7, "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", true},
{"style", "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mjust another test\x1B[38;2;249;38;114m)\x1B[0m", 3, "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mju\nst \nano\nthe\nr t\nest\x1B[38;2;249;38;114m\n)\x1B[0m", true},
{"style_lf", "I really \x1B[38;2;249;38;114mlove\x1B[0m Go!", 8, "I really\n\x1b[38;2;249;38;114mlove\x1b[0m Go!", false},
{"style_emoji", "I really \x1B[38;2;249;38;114mlove u🫧\x1B[0m", 8, "I really\n\x1b[38;2;249;38;114mlove u🫧\x1b[0m", false},
{"hyperlink", "I really \x1B]8;;https://example.com/\x1B\\love\x1B]8;;\x1B\\ Go!", 10, "I really \x1b]8;;https://example.com/\x1b\\l\nove\x1b]8;;\x1b\\ Go!", false},
{"dcs", "\x1BPq#0;2;0;0;0#1;2;100;100;0#2;2;0;100;0#1~~@@vv@@~~@@~~$#2??}}GG}}??}}??-#1!14@\x1B\\foobar", 3, "\x1BPq#0;2;0;0;0#1;2;100;100;0#2;2;0;100;0#1~~@@vv@@~~@@~~$#2??}}GG}}??}}??-#1!14@\x1B\\foo\nbar", false},
{"begin_with_space", " foo", 4, " foo", false},
{"style_dont_affect_wrap", "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", 7, "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", false},
{"preserve_style", "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mjust another test\x1B[38;2;249;38;114m)\x1B[0m", 3, "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mju\nst \nano\nthe\nr t\nest\x1B[38;2;249;38;114m\n)\x1B[0m", false},
{"emoji", "foo🫧foobar", 4, "foo\n🫧fo\nobar", false},
{"osc8_wrap", "สวัสดีสวัสดี\x1b]8;;https://example.com\x1b\\สวัสดีสวัสดี\x1b]8;;\x1b\\", 8, "สวัสดีสวัสดี\x1b]8;;https://example.com\x1b\\\nสวัสดีสวัสดี\x1b]8;;\x1b\\", false},
}
func TestHardwrap(t *testing.T) {
for i, tt := range cases {
t.Run(tt.name, func(t *testing.T) {
if got := ansi.Hardwrap(tt.input, tt.limit, tt.preserveSpace); got != tt.expected {
t.Errorf("case %d, expected %q, got %q", i+1, tt.expected, got)
}
})
}
}
var wwCases = []struct {
name string
input string
limit int
breakPoints string
expected string
}{
{"empty string", "", 0, "", ""},
{"passthrough", "foobar\n ", 0, "", "foobar\n "},
{"pass", "foo", 3, "", "foo"},
{"toolong", "foobarfoo", 4, "", "foobarfoo"},
{"white space", "foo bar foo", 4, "", "foo\nbar\nfoo"},
{"broken_at_spaces", "foo bars foobars", 4, "", "foo\nbars\nfoobars"},
{"hyphen", "foo-foobar", 4, "-", "foo-\nfoobar"},
{"emoji_breakpoint", "foo😃 foobar", 4, "😃", "foo😃\nfoobar"},
{"wide_emoji_breakpoint", "foo🫧 foobar", 4, "🫧", "foo🫧\nfoobar"},
{"space_breakpoint", "foo --bar", 9, "-", "foo --bar"},
{"simple", "foo bars foobars", 4, "", "foo\nbars\nfoobars"},
{"limit", "foo bar", 5, "", "foo\nbar"},
{"remove white spaces", "foo \nb ar ", 4, "", "foo\nb\nar"},
{"white space trail width", "foo\nb\t a\n bar", 4, "", "foo\nb\t a\n bar"},
{"explicit_line_break", "foo bar foo\n", 4, "", "foo\nbar\nfoo\n"},
{"explicit_breaks", "\nfoo bar\n\n\nfoo\n", 4, "", "\nfoo\nbar\n\n\nfoo\n"},
{"example", " This is a list: \n\n\t* foo\n\t* bar\n\n\n\t* foo \nbar ", 6, "", " This\nis a\nlist: \n\n\t* foo\n\t* bar\n\n\n\t* foo\nbar"},
{"style_code_dont_affect_length", "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", 7, "", "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m"},
{"style_code_dont_get_wrapped", "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mjust another test\x1B[38;2;249;38;114m)\x1B[0m", 3, "", "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mjust\nanother\ntest\x1B[38;2;249;38;114m)\x1B[0m"},
{"osc8_wrap", "สวัสดีสวัสดี\x1b]8;;https://example.com\x1b\\ สวัสดีสวัสดี\x1b]8;;\x1b\\", 8, "", "สวัสดีสวัสดี\x1b]8;;https://example.com\x1b\\\nสวัสดีสวัสดี\x1b]8;;\x1b\\"},
}
func TestWordwrap(t *testing.T) {
for i, tt := range wwCases {
t.Run(tt.name, func(t *testing.T) {
if got := ansi.Wordwrap(tt.input, tt.limit, tt.breakPoints); got != tt.expected {
t.Errorf("case %d, expected %q, got %q", i+1, tt.expected, got)
}
})
}
}
func TestWrapWordwrap(t *testing.T) {
input := "the quick brown foxxxxxxxxxxxxxxxx jumped over the lazy dog."
limit := 16
output := ansi.Wrap(input, limit, "")
if output != "the quick brown\nfoxxxxxxxxxxxxxx\nxx jumped over\nthe lazy dog." {
t.Errorf("expected %q, got %q", "the quick brown\nfoxxxxxxxxxxxxxx\nxx jumped over\nthe lazy dog.", output)
}
}
var wrapCases = []struct {
name string
input string
expected string
width int
}{
{
name: "simple",
input: "I really \x1B[38;2;249;38;114mlove\x1B[0m Go!",
expected: "I really\n\x1B[38;2;249;38;114mlove\x1B[0m Go!",
width: 8,
},
{
name: "passthrough",
input: "hello world",
expected: "hello world",
width: 11,
},
{
name: "asian",
input: "こんにち",
expected: "こんに\nち",
width: 7,
},
{
name: "emoji",
input: "😃👰🏻♀️🫧",
expected: "😃\n👰🏻♀️\n🫧",
width: 2,
},
{
name: "long style",
input: "\x1B[38;2;249;38;114ma really long string\x1B[0m",
expected: "\x1B[38;2;249;38;114ma really\nlong\nstring\x1B[0m",
width: 10,
},
{
name: "long style nbsp",
input: "\x1B[38;2;249;38;114ma really\u00a0long string\x1B[0m",
expected: "\x1b[38;2;249;38;114ma\nreally\u00a0lon\ng string\x1b[0m",
width: 10,
},
{
name: "longer",
input: "the quick brown foxxxxxxxxxxxxxxxx jumped over the lazy dog.",
expected: "the quick brown\nfoxxxxxxxxxxxxxx\nxx jumped over\nthe lazy dog.",
width: 16,
},
{
name: "longer asian",
input: "猴 猴 猴猴 猴猴猴猴猴猴猴猴猴 猴猴猴 猴猴 猴’ 猴猴 猴.",
expected: "猴 猴 猴猴\n猴猴猴猴猴猴猴猴\n猴 猴猴猴 猴猴\n猴’ 猴猴 猴.",
width: 16,
},
{
name: "long input",
input: "Rotated keys for a-good-offensive-cheat-code-incorporated/animal-like-law-on-the-rocks.",
expected: "Rotated keys for a-good-offensive-cheat-code-incorporated/animal-like-law-\non-the-rocks.",
width: 76,
},
{
name: "long input2",
input: "Rotated keys for a-good-offensive-cheat-code-incorporated/crypto-line-operating-system.",
expected: "Rotated keys for a-good-offensive-cheat-code-incorporated/crypto-line-\noperating-system.",
width: 76,
},
{
name: "hyphen breakpoint",
input: "a-good-offensive-cheat-code",
expected: "a-good-\noffensive-\ncheat-code",
width: 10,
},
{
name: "exact",
input: "\x1b[91mfoo\x1b[0",
expected: "\x1b[91mfoo\x1b[0",
width: 3,
},
{
// XXX: Should we preserve spaces on text wrapping?
name: "extra space",
input: "foo ",
expected: "foo",
width: 3,
},
{
name: "extra space style",
input: "\x1b[mfoo \x1b[m",
expected: "\x1b[mfoo\n \x1b[m",
width: 3,
},
{
name: "paragraph with styles",
input: "Lorem ipsum dolor \x1b[1msit\x1b[m amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. \x1b[31mUt enim\x1b[m ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea \x1b[38;5;200mcommodo consequat\x1b[m. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. \x1b[1;2;33mExcepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\x1b[m",
expected: "Lorem ipsum dolor \x1b[1msit\x1b[m amet,\nconsectetur adipiscing elit,\nsed do eiusmod tempor\nincididunt ut labore et dolore\nmagna aliqua. \x1b[31mUt enim\x1b[m ad minim\nveniam, quis nostrud\nexercitation ullamco laboris\nnisi ut aliquip ex ea \x1b[38;5;200mcommodo\nconsequat\x1b[m. Duis aute irure\ndolor in reprehenderit in\nvoluptate velit esse cillum\ndolore eu fugiat nulla\npariatur. \x1b[1;2;33mExcepteur sint\noccaecat cupidatat non\nproident, sunt in culpa qui\nofficia deserunt mollit anim\nid est laborum.\x1b[m",
width: 30,
},
{"hyphen break", "foo-bar", "foo-\nbar", 5},
{"double space", "f bar foobaz", "f bar\nfoobaz", 6},
{"passthrough", "foobar\n ", "foobar\n ", 0},
{"pass", "foo", "foo", 3},
{"toolong", "foobarfoo", "foob\narfo\no", 4},
{"white space", "foo bar foo", "foo\nbar\nfoo", 4},
{"broken_at_spaces", "foo bars foobars", "foo\nbars\nfoob\nars", 4},
{"hyphen", "foob-foobar", "foob\n-foo\nbar", 4},
{"wide_emoji_breakpoint", "foo🫧 foobar", "foo\n🫧\nfoob\nar", 4},
{"space_breakpoint", "foo --bar", "foo --bar", 9},
{"simple", "foo bars foobars", "foo\nbars\nfoob\nars", 4},
{"limit", "foo bar", "foo\nbar", 5},
{"remove white spaces", "foo \nb ar ", "foo\nb\nar", 4},
{"white space trail width", "foo\nb\t a\n bar", "foo\nb\t a\n bar", 4},
{"explicit_line_break", "foo bar foo\n", "foo\nbar\nfoo\n", 4},
{"explicit_breaks", "\nfoo bar\n\n\nfoo\n", "\nfoo\nbar\n\n\nfoo\n", 4},
{"example", " This is a list: \n\n\t* foo\n\t* bar\n\n\n\t* foo \nbar ", " This\nis a\nlist: \n\n\t* foo\n\t* bar\n\n\n\t* foo\nbar", 6},
{"style_code_dont_affect_length", "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m", 7},
{"style_code_dont_get_wrapped", "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mjust another test\x1B[38;2;249;38;114m)\x1B[0m", "\x1b[38;2;249;38;114m(\x1b[0m\x1b[38;2;248;248;242mjust\nanother\ntest\x1b[38;2;249;38;114m)\x1b[0m", 7},
{"osc8_wrap", "สวัสดีสวัสดี\x1b]8;;https://example.com\x1b\\ สวัสดีสวัสดี\x1b]8;;\x1b\\", "สวัสดีสวัสดี\x1b]8;;https://example.com\x1b\\\nสวัสดีสวัสดี\x1b]8;;\x1b\\", 8},
}
func TestWrap(t *testing.T) {
for i, tc := range wrapCases {
t.Run(tc.name, func(t *testing.T) {
output := ansi.Wrap(tc.input, tc.width, "")
if output != tc.expected {
t.Errorf("case %d, input %q, expected %q, got %q", i+1, tc.input, tc.expected, output)
}
})
}
}