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package wrap
import (
"testing"
)
func TestWrap(t *testing.T) {
tt := []struct {
Input string
Expected string
Limit int
KeepNewlines bool
PreserveSpace bool
TabWidth int
}{
// No-op, should pass through, including trailing whitespace:
{
Input: "foobar\n ",
Expected: "foobar\n ",
Limit: 0,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
// Nothing to wrap here, should pass through:
{
Input: "foo",
Expected: "foo",
Limit: 4,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
// In contrast to wordwrap we break a long word to obey the given limit
{
Input: "foobarfoo",
Expected: "foob\narfo\no",
Limit: 4,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
// Newlines in the input are respected if desired
{
Input: "f\no\nobar",
Expected: "f\no\noba\nr",
Limit: 3,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
// Newlines in the input can be ignored if desired
{
Input: "f\no\nobar",
Expected: "foo\nbar",
Limit: 3,
KeepNewlines: false,
PreserveSpace: false,
TabWidth: 0,
},
// Leading whitespaces after forceful line break can be preserved if desired
{
Input: "foo bar\n baz",
Expected: "foo\n ba\nr\n b\naz",
Limit: 3,
KeepNewlines: true,
PreserveSpace: true,
TabWidth: 0,
},
// Leading whitespaces after forceful line break can be removed if desired
{
Input: "foo bar\n baz",
Expected: "foo\nbar\n b\naz",
Limit: 3,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
// Tabs are broken up according to the configured TabWidth
{
Input: "foo\tbar",
Expected: "foo \n ba\nr",
Limit: 4,
KeepNewlines: true,
PreserveSpace: true,
TabWidth: 3,
},
// Remaining width of wrapped tab is ignored when space is not preserved
{
Input: "foo\tbar",
Expected: "foo \nbar",
Limit: 4,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 3,
},
// ANSI sequence codes don't affect length calculation:
{
Input: "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m",
Expected: "\x1B[38;2;249;38;114mfoo\x1B[0m\x1B[38;2;248;248;242m \x1B[0m\x1B[38;2;230;219;116mbar\x1B[0m",
Limit: 7,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
// ANSI control codes don't get wrapped:
{
Input: "\x1B[38;2;249;38;114m(\x1B[0m\x1B[38;2;248;248;242mjust another test\x1B[38;2;249;38;114m)\x1B[0m",
Expected: "\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",
Limit: 3,
KeepNewlines: true,
PreserveSpace: false,
TabWidth: 0,
},
}
for i, tc := range tt {
f := NewWriter(tc.Limit)
f.KeepNewlines = tc.KeepNewlines
f.PreserveSpace = tc.PreserveSpace
f.TabWidth = tc.TabWidth
_, err := f.Write([]byte(tc.Input))
if err != nil {
t.Error(err)
}
if f.String() != tc.Expected {
t.Errorf("Test %d, expected:\n\n`%s`\n\nActual Output:\n\n`%s`", i, tc.Expected, f.String())
}
}
}
func TestWrapString(t *testing.T) {
actual := String("foo bar", 3)
expected := "foo\nbar"
if actual != expected {
t.Errorf("expected:\n\n`%s`\n\nActual Output:\n\n`%s`", expected, actual)
}
}
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