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package uniseg
import "testing"
// Test all official Unicode test cases for line breaks using the byte slice
// function.
func TestLineCasesBytes(t *testing.T) {
for testNum, testCase := range lineBreakTestCases {
/*t.Logf(`Test case %d %q: Expecting %x, getting %x, code points %x"`,
testNum,
strings.TrimSpace(testCase.original),
testCase.expected,
decomposed(testCase.original),
[]rune(testCase.original))*/
var (
segment []byte
index int
)
state := -1
b := []byte(testCase.original)
WordLoop:
for index = 0; len(b) > 0; index++ {
if index >= len(testCase.expected) {
t.Errorf(`Test case %d %q failed: More segments %d returned than expected %d`,
testNum,
testCase.original,
index,
len(testCase.expected))
break
}
segment, b, _, state = FirstLineSegment(b, state)
cluster := []rune(string(segment))
if len(cluster) != len(testCase.expected[index]) {
t.Errorf(`Test case %d %q failed: Segment at index %d has %d codepoints %x, %d expected %x`,
testNum,
testCase.original,
index,
len(cluster),
cluster,
len(testCase.expected[index]),
testCase.expected[index])
break
}
for i, r := range cluster {
if r != testCase.expected[index][i] {
t.Errorf(`Test case %d %q failed: Segment at index %d is %x, expected %x`,
testNum,
testCase.original,
index,
cluster,
testCase.expected[index])
break WordLoop
}
}
}
if index < len(testCase.expected) {
t.Errorf(`Test case %d %q failed: Fewer segments returned (%d) than expected (%d)`,
testNum,
testCase.original,
index,
len(testCase.expected))
}
}
segment, rest, mustBreak, newState := FirstLineSegment([]byte{}, -1)
if len(segment) > 0 {
t.Errorf(`Expected segment to be empty byte slice, got %q`, segment)
}
if len(rest) > 0 {
t.Errorf(`Expected rest to be empty byte slice, got %q`, rest)
}
if mustBreak {
t.Error(`Expected mustBreak to be false, got true`)
}
if newState != 0 {
t.Errorf(`Expected newState to be 0, got %d`, newState)
}
}
// Test all official Unicode test cases for line breaks using the string
// function.
func TestLineCasesString(t *testing.T) {
for testNum, testCase := range lineBreakTestCases {
/*t.Logf(`Test case %d %q: Expecting %x, getting %x, code points %x"`,
testNum,
strings.TrimSpace(testCase.original),
testCase.expected,
decomposed(testCase.original),
[]rune(testCase.original))*/
var (
segment string
index int
)
state := -1
str := testCase.original
WordLoop:
for index = 0; len(str) > 0; index++ {
if index >= len(testCase.expected) {
t.Errorf(`Test case %d %q failed: More segments %d returned than expected %d`,
testNum,
testCase.original,
index,
len(testCase.expected))
break
}
segment, str, _, state = FirstLineSegmentInString(str, state)
cluster := []rune(string(segment))
if len(cluster) != len(testCase.expected[index]) {
t.Errorf(`Test case %d %q failed: Segment at index %d has %d codepoints %x, %d expected %x`,
testNum,
testCase.original,
index,
len(cluster),
cluster,
len(testCase.expected[index]),
testCase.expected[index])
break
}
for i, r := range cluster {
if r != testCase.expected[index][i] {
t.Errorf(`Test case %d %q failed: Segment at index %d is %x, expected %x`,
testNum,
testCase.original,
index,
cluster,
testCase.expected[index])
break WordLoop
}
}
}
if index < len(testCase.expected) {
t.Errorf(`Test case %d %q failed: Fewer segments returned (%d) than expected (%d)`,
testNum,
testCase.original,
index,
len(testCase.expected))
}
}
segment, rest, mustBreak, newState := FirstLineSegmentInString("", -1)
if len(segment) > 0 {
t.Errorf(`Expected segment to be empty string, got %q`, segment)
}
if len(rest) > 0 {
t.Errorf(`Expected rest to be empty string, got %q`, rest)
}
if mustBreak {
t.Error(`Expected mustBreak to be false, got true`)
}
if newState != 0 {
t.Errorf(`Expected newState to be 0, got %d`, newState)
}
}
var hasTrailingLineBreakTestCases = []struct {
input string
want bool
}{
{"\v", true}, // prBK
{"\r", true}, // prCR
{"\n", true}, // prLF
{"\u0085", true}, // prNL
{" ", false},
{"A", false},
{"", false},
}
func TestHasTrailingLineBreak(t *testing.T) {
for _, tt := range hasTrailingLineBreakTestCases {
got := HasTrailingLineBreak([]byte(tt.input))
if got != tt.want {
t.Errorf("HasTrailingLineBreak(%q) = %v, want %v", tt.input, got, tt.want)
}
}
}
func TestHasTrailingLineBreakInString(t *testing.T) {
for _, tt := range hasTrailingLineBreakTestCases {
got := HasTrailingLineBreakInString(tt.input)
if got != tt.want {
t.Errorf("HasTrailingLineBreak(%q) = %v, want %v", tt.input, got, tt.want)
}
}
}
// Benchmark the use of the line break function for byte slices.
func BenchmarkLineFunctionBytes(b *testing.B) {
for i := 0; i < b.N; i++ {
var c []byte
state := -1
str := benchmarkBytes
for len(str) > 0 {
c, str, _, state = FirstLineSegment(str, state)
resultRunes = []rune(string(c))
}
}
}
// Benchmark the use of the line break function for strings.
func BenchmarkLineFunctionString(b *testing.B) {
for i := 0; i < b.N; i++ {
var c string
state := -1
str := benchmarkStr
for len(str) > 0 {
c, str, _, state = FirstLineSegmentInString(str, state)
resultRunes = []rune(c)
}
}
}
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