package utf8s_test import ( "github.com/reiver/go-utf8s" "strings" "testing" ) func TestRuneWriter(t *testing.T) { tests := []struct{ Runes []rune Expected string }{ { Runes: []rune{}, Expected: "", }, { Runes: []rune{'a','p','p','l','e'}, Expected: "apple", }, { Runes: []rune{'B','A','N','A','N','A'}, Expected: "BANANA", }, { Runes: []rune{'C','h','e','r','r','y'}, Expected: "Cherry", }, { Runes: []rune{'d','A','T','E'}, Expected: "dATE", }, { Runes: []rune{'😀','😁','😂','😃','😄','😅','😆','😇','😈','😉','😊','😋','😌','😍','😎','😏'}, Expected: "😀😁😂😃😄😅😆😇😈😉😊😋😌😍😎😏", }, { Runes: []rune{'H','i','!','\u2029','👾','\u2029','S','e','e',' ','y','a','\u2029'}, Expected: "Hi!\u2029👾\u2029See ya\u2029", }, } TestLoop: for testNumber, test := range tests { var buffer strings.Builder var total int runeWriter := utf8s.NewRuneWriter(&buffer) for runeNumber, r := range test.Runes { n, err := runeWriter.WriteRune(r) if nil != err { t.Errorf("For test #%d and rune #%d, did not expect an error, but actually got one.", testNumber, runeNumber) for i, rr := range test.Runes { t.Logf("\t[%d] %q (%d)", i, string(rr), rr) } t.Logf("ERROR TYPE: %T", err) t.Logf("ERROR: %q", err) continue TestLoop } if expected, actual := n, utf8s.Len(r); expected != actual { t.Errorf("For test #%d and rune #%d, expected a certain number of bytes to be written, but actually wasn't.", testNumber, runeNumber) for i, rr := range test.Runes { t.Logf("\t[%d] %q (%d)", i, string(rr), rr) } t.Logf("RUNE: %q (%d)", string(r), r) t.Logf("EXPECTED: %d", expected) t.Logf("ACTUAL: %d", actual) continue TestLoop } total += n } if expected, actual := len(test.Expected), total; expected != actual { t.Errorf("For test #%d, expected the total number of bytes to be written to be something, but actually wasn't.", testNumber) for i, rr := range test.Runes { t.Logf("\t[%d] %q (%d)", i, string(rr), rr) } t.Logf("EXPECTED: %d", expected) t.Logf("ACTUAL: %d", actual) continue TestLoop } if expected, actual := test.Expected, buffer.String(); expected != actual { t.Errorf("For test #%d, what what expected to be written, is not what was actually written.", testNumber) for i, rr := range test.Runes { t.Logf("\t[%d] %q (%d)", i, string(rr), rr) } t.Logf("EXPECTED: %q", expected) t.Logf("ACTUAL: %q", actual) continue TestLoop } } }