utf8s.RuneScanner

master
Charles Iliya Krempeaux 2018-07-10 21:33:46 -07:00
parent e0bbe43401
commit df63c8bd2e
1 changed files with 62 additions and 0 deletions

View File

@ -596,3 +596,65 @@ func TestRuneScanners(t *testing.T) {
}
}
}
func TestRuneScannerUnread(t *testing.T) {
tests := []struct{
Reader io.Reader
Instructions []rune
ExpectedRune []rune
ExpectedSize []int
}{
{
Reader: strings.NewReader("a ≡ b\r\n۰۱۲۳۴۵۶۷۸۹ \U00010001"),
Instructions: []rune{'r', 'u', 'r', 'u', 'u', 'r', 'r', 'u', 'r', 'r', 'u', 'r', 'u', 'u', 'r', 'r', 'r', 'r', 'r', 'r', 'r', 'r', 'r', 'r', 'r', 'u', 'u', 'u', 'r', 'r', 'r', 'r', 'r', 'r', 'r'},
ExpectedRune: []rune{'a', 'a', 'a', ' ', ' ', '≡', '≡', '≡', ' ', 'b', '\r', '\n', '۰', '۱', '۲', '۳', '۴', '۵', '۵', '۶', '۷', '۸', '۹', ' ', '\U00010001'},
ExpectedSize: []int{ 1, 1, 1, 1, 1, 3, 3, 3, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 4},
},
}
TestLoop: for testNumber, test := range tests {
runeScanner := NewRuneScanner(test.Reader)
var readCount int
for instructionNumber, instruction := range test.Instructions {
switch instruction {
case 'r': // = rea
actualRune, actualSize, err := runeScanner.ReadRune()
if nil != err {
t.Errorf("For test #%d and instruction #%d, did not expected an error, but actually got one: (%T) %q", testNumber, instructionNumber, err, err)
continue TestLoop
}
expectedRune := test.ExpectedRune[readCount]
expectedSize := test.ExpectedSize[readCount]
if expected, actual := expectedRune, actualRune; expected != actual {
t.Errorf("For test #%d and instruction #%d, expected rune %q / %d, but actually got %q / %d", testNumber, instructionNumber, expected, expected, actual, actual)
continue TestLoop
}
if expected, actual := expectedSize, actualSize; expected != actual {
t.Errorf("For test #%d and instruction #%d, for rune %q / %d expected size %d, but actually got size %d", testNumber, instructionNumber, expectedRune, expectedRune, expected, actual)
continue TestLoop
}
readCount++
case 'u': // = unread
if err := runeScanner.UnreadRune(); nil != err {
t.Errorf("For test #%d and instruction #%d, did not expected an error, but actually got one: (%T) %q", testNumber, instructionNumber, err, err)
continue TestLoop
}
default:
t.Errorf("For test #%d and instruction #%d, UNKNOWN INSTRUCTION!!!:... %q", testNumber, instructionNumber, instruction)
continue TestLoop
}
}
}
}