INNER CODE UNIT · Go

firstDifference

xo/usql · cli_test.go:236

func firstDifference(want, got string) string {
	wantLines, gotLines := splitLines(want), splitLines(got)
	for i := 0; i < len(wantLines) && i < len(gotLines); i++ {
		if wantLines[i] != gotLines[i] {
			return fmt.Sprintf("line %d:\n  want: %q\n  got:  %q", i+1, wantLines[i], gotLines[i])
		}
	}
	return fmt.Sprintf("the recordings agree for %d lines, then the lengths differ: want %d lines, got %d",
		min(len(wantLines), len(gotLines)), len(wantLines), len(gotLines))
}

// splitLines splits s on newlines without dropping a trailing empty line.
func splitLines(s string) []string {
	var out []string
	start := 0
	for i := 0; i < len(s); i++ {
		if s[i] == '\n' {
			out = append(out, s[start:i])

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