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/*
* Copyright 2019 JetBrains s.r.o.
*
* 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 kotlinx.io
import kotlinx.serialization.internal.HexConverter
import kotlinx.serialization.test.shouldBe
import kotlin.test.Test
import kotlin.test.assertEquals
class ByteBufferTest {
@Test
fun longsAndDoubles() {
ByteBuffer.allocate(8).putDouble(199.0).print() shouldBe "4068E00000000000"
ByteBuffer.allocate(8).putLong(Int.MAX_VALUE.toLong() + 2).print() shouldBe "0000000080000001"
ByteBuffer.from("4068E00000000000").getDouble() shouldBe 199.0
ByteBuffer.from("0000000080000001").getLong() shouldBe Int.MAX_VALUE.toLong() + 2
}
@Test
fun byteOrder() {
val bb = ByteBuffer.allocate(4)
// reading test
bb.order(ByteOrder.BIG_ENDIAN)
bb.put(0)
bb.put(0)
bb.put(5)
bb.put(57)
bb.flip()
assertEquals(1337, bb.getInt())
bb.flip()
bb.order(ByteOrder.LITTLE_ENDIAN)
assertEquals(956628992, bb.getInt())
bb.flip()
bb.order(ByteOrder.BIG_ENDIAN)
assertEquals(1337, bb.getInt())
// writing test
bb.clear()
bb.order(ByteOrder.BIG_ENDIAN)
bb.putInt(1337)
bb.flip()
assertEquals(0, bb.get())
assertEquals(0, bb.get())
assertEquals(5, bb.get())
assertEquals(57, bb.get())
bb.clear()
bb.order(ByteOrder.LITTLE_ENDIAN)
bb.putInt(1337)
bb.flip()
assertEquals(57, bb.get())
assertEquals(5, bb.get())
assertEquals(0, bb.get())
assertEquals(0, bb.get())
}
private fun ByteBuffer.print() = HexConverter.printHexBinary(this.array())
@Suppress("NAME_SHADOWING")
private fun ByteBuffer.Companion.from(source: String) = HexConverter.parseHexBinary(source).let { source ->
ByteBuffer.allocate(source.size).put(source).flip()
}
}
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