// formatDescr formats a given string (typically a snap description)
// in a user friendly way.
//
// The rules are (intentionally) very simple:
// - word wrap at "max" chars
// - keep \n intact and break here
// - ignore \r
func formatDescr(descr string, max int) string {
out := bytes.NewBuffer(nil)
for _, line := range strings.Split(descr, "\n") {
if len(line) > max {
for _, chunk := range strutil.WordWrap(line, max) {
fmt.Fprintf(out, " %s\n", chunk)
}
} else {
fmt.Fprintf(out, " %s\n", line)
}
}
return strings.TrimSuffix(out.String(), "\n")
}
func (ts *strutilSuite) TestWordWrap(c *check.C) {
for _, t := range []struct {
in string
out []string
n int
}{
// pathological
{"12345", []string{"12345"}, 3},
{"123 456789", []string{"123", "456789"}, 3},
// valid
{"abc def ghi", []string{"abc", "def", "ghi"}, 3},
{"a b c d e f", []string{"a b", "c d", "e f"}, 3},
{"ab cd ef", []string{"ab cd", "ef"}, 5},
// intentional (but slightly strange)
{"ab cd", []string{"ab", "cd"}, 2},
} {
c.Check(strutil.WordWrap(t.in, t.n), check.DeepEquals, t.out)
}
}