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package ui
import (
"reflect"
"testing"
)
func TestWordWrapPreservesASCIIWrapping(t *testing.T) {
tests := []struct {
name string
text string
width int
want []string
}{
{
name: "wraps at word boundary",
text: "alpha beta gamma delta",
width: 12,
want: []string{"alpha beta", "gamma delta"},
},
{
name: "normalizes ascii whitespace",
text: "alpha beta\ngamma",
width: 10,
want: []string{"alpha beta", "gamma"},
},
{
name: "keeps over-width word intact",
text: "alphabetagamma delta",
width: 8,
want: []string{"alphabetagamma", "delta"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := wordWrap(tt.text, tt.width)
if !reflect.DeepEqual(got, tt.want) {
t.Fatalf("wordWrap(%q, %d) = %#v, want %#v", tt.text, tt.width, got, tt.want)
}
})
}
}
func TestWordWrapCountsUTF8Runes(t *testing.T) {
tests := []struct {
name string
text string
width int
want []string
}{
{
name: "accented text fits by rune count",
text: "café latte",
width: 10,
want: []string{"café latte"},
},
{
name: "cjk text fits by rune count",
text: "漢字 test",
width: 7,
want: []string{"漢字 test"},
},
{
name: "emoji text fits by rune count",
text: "fix 😀 bug",
width: 9,
want: []string{"fix 😀 bug"},
},
{
name: "wraps multibyte text when rune count exceeds width",
text: "café latte crème",
width: 10,
want: []string{"café latte", "crème"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := wordWrap(tt.text, tt.width)
if !reflect.DeepEqual(got, tt.want) {
t.Fatalf("wordWrap(%q, %d) = %#v, want %#v", tt.text, tt.width, got, tt.want)
}
})
}
}
|
