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/*
* Copyright (C) 2018 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package okio
import okio.ByteString.Companion.decodeHex
import okio.internal.commonAsUtf8ToByteArray
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
class Utf8KotlinTest {
@Test fun oneByteCharacters() {
assertEncoded("00", 0x00) // Smallest 1-byte character.
assertEncoded("20", ' '.toInt())
assertEncoded("7e", '~'.toInt())
assertEncoded("7f", 0x7f) // Largest 1-byte character.
}
@Test fun twoByteCharacters() {
assertEncoded("c280", 0x0080) // Smallest 2-byte character.
assertEncoded("c3bf", 0x00ff)
assertEncoded("c480", 0x0100)
assertEncoded("dfbf", 0x07ff) // Largest 2-byte character.
}
@Test fun threeByteCharacters() {
assertEncoded("e0a080", 0x0800) // Smallest 3-byte character.
assertEncoded("e0bfbf", 0x0fff)
assertEncoded("e18080", 0x1000)
assertEncoded("e1bfbf", 0x1fff)
assertEncoded("ed8080", 0xd000)
assertEncoded("ed9fbf", 0xd7ff) // Largest character lower than the min surrogate.
assertEncoded("ee8080", 0xe000) // Smallest character greater than the max surrogate.
assertEncoded("eebfbf", 0xefff)
assertEncoded("ef8080", 0xf000)
assertEncoded("efbfbf", 0xffff) // Largest 3-byte character.
}
@Test fun fourByteCharacters() {
assertEncoded("f0908080", 0x010000) // Smallest surrogate pair.
assertEncoded("f48fbfbf", 0x10ffff) // Largest code point expressible by UTF-16.
}
@Test fun unknownBytes() {
assertCodePointDecoded("f8", REPLACEMENT_CODE_POINT) // Too large
assertCodePointDecoded("f0f8", REPLACEMENT_CODE_POINT, REPLACEMENT_CODE_POINT)
assertCodePointDecoded("ff", REPLACEMENT_CODE_POINT) // Largest
assertCodePointDecoded("f0ff", REPLACEMENT_CODE_POINT, REPLACEMENT_CODE_POINT)
// Lone continuation
assertCodePointDecoded("80", REPLACEMENT_CODE_POINT) // Smallest
assertCodePointDecoded("bf", REPLACEMENT_CODE_POINT) // Largest
}
@Test fun overlongSequences() {
// Overlong representation of the NUL character
assertCodePointDecoded("c080", REPLACEMENT_CODE_POINT)
assertCodePointDecoded("e08080", REPLACEMENT_CODE_POINT)
assertCodePointDecoded("f0808080", REPLACEMENT_CODE_POINT)
// Maximum overlong sequences
assertCodePointDecoded("c1bf", REPLACEMENT_CODE_POINT)
assertCodePointDecoded("e09fbf", REPLACEMENT_CODE_POINT)
assertCodePointDecoded("f08fbfbf", REPLACEMENT_CODE_POINT)
}
@Test fun danglingHighSurrogate() {
assertStringEncoded("3f", "\ud800") // "?"
assertCodePointDecoded("eda080", REPLACEMENT_CODE_POINT)
}
@Test fun lowSurrogateWithoutHighSurrogate() {
assertStringEncoded("3f", "\udc00") // "?"
assertCodePointDecoded("edb080", REPLACEMENT_CODE_POINT)
}
@Test fun highSurrogateFollowedByNonSurrogate() {
assertStringEncoded("3fee8080", "\ud800\ue000") // "?\ue000": Following character is too high.
assertCodePointDecoded("f090ee8080", REPLACEMENT_CODE_POINT, '\ue000'.toInt())
assertStringEncoded("3f61", "\ud800\u0061") // "?a": Following character is too low.
assertCodePointDecoded("f09061", REPLACEMENT_CODE_POINT, 'a'.toInt())
}
@Test fun doubleLowSurrogate() {
assertStringEncoded("3f3f", "\udc00\udc00") // "??"
assertCodePointDecoded("edb080edb080", REPLACEMENT_CODE_POINT, REPLACEMENT_CODE_POINT)
}
@Test fun doubleHighSurrogate() {
assertStringEncoded("3f3f", "\ud800\ud800") // "??"
assertCodePointDecoded("eda080eda080", REPLACEMENT_CODE_POINT, REPLACEMENT_CODE_POINT)
}
@Test fun lowSurrogateHighSurrogate() {
assertStringEncoded("3f3f", "\udc00\ud800") // "??"
assertCodePointDecoded("edb080eda080", REPLACEMENT_CODE_POINT, REPLACEMENT_CODE_POINT)
}
@Test fun writeSurrogateCodePoint() {
assertStringEncoded("ed9fbf", "\ud7ff") // Below lowest surrogate is okay.
assertCodePointDecoded("ed9fbf", '\ud7ff'.toInt())
assertStringEncoded("3f", "\ud800") // Lowest surrogate gets '?'.
assertCodePointDecoded("eda080", REPLACEMENT_CODE_POINT)
assertStringEncoded("3f", "\udfff") // Highest surrogate gets '?'.
assertCodePointDecoded("edbfbf", REPLACEMENT_CODE_POINT)
assertStringEncoded("ee8080", "\ue000") // Above highest surrogate is okay.
assertCodePointDecoded("ee8080", '\ue000'.toInt())
}
@Test fun size() {
assertEquals(0, "".utf8Size())
assertEquals(3, "abc".utf8Size())
assertEquals(16, "təˈranəˌsôr".utf8Size())
}
@Test fun sizeWithBounds() {
assertEquals(0, "".utf8Size(0, 0))
assertEquals(0, "abc".utf8Size(0, 0))
assertEquals(1, "abc".utf8Size(1, 2))
assertEquals(2, "abc".utf8Size(0, 2))
assertEquals(3, "abc".utf8Size(0, 3))
assertEquals(16, "təˈranəˌsôr".utf8Size(0, 11))
assertEquals(5, "təˈranəˌsôr".utf8Size(3, 7))
}
@Test fun sizeBoundsCheck() {
assertFailsWith<IllegalArgumentException> {
"abc".utf8Size(-1, 2)
}
assertFailsWith<IllegalArgumentException> {
"abc".utf8Size(2, 1)
}
assertFailsWith<IllegalArgumentException> {
"abc".utf8Size(1, 4)
}
}
private fun assertEncoded(hex: String, vararg codePoints: Int) {
assertCodePointDecoded(hex, *codePoints)
}
private fun assertCodePointDecoded(hex: String, vararg codePoints: Int) {
val bytes = hex.decodeHex().toByteArray()
var i = 0
bytes.processUtf8CodePoints(0, bytes.size) { codePoint ->
if (i < codePoints.size) assertEquals(codePoints[i], codePoint, "index=$i")
i++
}
assertEquals(i, codePoints.size) // Checked them all
}
private fun assertStringEncoded(hex: String, string: String) {
val expectedUtf8 = hex.decodeHex()
// Confirm our expectations are consistent with the platform.
val platformUtf8 = ByteString.of(*string.asUtf8ToByteArray())
assertEquals(expectedUtf8, platformUtf8)
// Confirm our implementations matches those expectations.
val actualUtf8 = ByteString.of(*string.commonAsUtf8ToByteArray())
assertEquals(expectedUtf8, actualUtf8)
// TODO Confirm we are consistent when writing one code point at a time.
// Confirm we are consistent when measuring lengths.
assertEquals(expectedUtf8.size.toLong(), string.utf8Size())
assertEquals(expectedUtf8.size.toLong(), string.utf8Size(0, string.length))
}
}
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