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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.impl.wire
import io.netty.buffer.ByteBuf
import io.netty.buffer.Unpooled
import io.netty.buffer.UnpooledByteBufAllocator
import org.assertj.core.api.Assertions.assertThat
import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.given
import org.jetbrains.spek.api.dsl.it
import org.onap.dcae.collectors.veshv.domain.WireFrameEncoder
import org.onap.dcae.collectors.veshv.domain.WireFrameDecoder
import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
import reactor.test.test
/**
* @author Piotr Jaszczyk <piotr.jaszczyk></piotr.jaszczyk>@nokia.com>
* @since May 2018
*/
internal object WireChunkDecoderTest : Spek({
val alloc = UnpooledByteBufAllocator.DEFAULT
val samplePayload = "konstantynopolitanczykowianeczka".toByteArray()
val anotherPayload = "ala ma kota a kot ma ale".toByteArray()
val encoder = WireFrameEncoder(alloc)
fun WireChunkDecoder.decode(frame: WireFrameMessage) = decode(encoder.encode(frame))
fun createInstance() = WireChunkDecoder(WireFrameDecoder(WireFrameMessage.DEFAULT_MAX_PAYLOAD_SIZE_BYTES), alloc)
fun verifyMemoryReleased(vararg byteBuffers: ByteBuf) {
for (bb in byteBuffers) {
assertThat(bb.refCnt())
.describedAs("should be released: $bb ref count")
.isEqualTo(0)
}
}
fun verifyMemoryNotReleased(vararg byteBuffers: ByteBuf) {
for (bb in byteBuffers) {
assertThat(bb.refCnt())
.describedAs("should not be released: $bb ref count")
.isEqualTo(1)
}
}
describe("decoding wire protocol") {
given("empty input") {
val input = Unpooled.EMPTY_BUFFER
it("should yield empty result") {
createInstance().decode(input).test().verifyComplete()
}
}
given("input with no readable bytes") {
val input = Unpooled.wrappedBuffer(byteArrayOf(0x00)).readerIndex(1)
it("should yield empty result") {
createInstance().decode(input).test().verifyComplete()
}
it("should release memory") {
verifyMemoryReleased(input)
}
}
given("invalid input (not starting with marker)") {
val input = Unpooled.wrappedBuffer(samplePayload)
it("should yield error") {
createInstance().decode(input).test()
.verifyError(WireFrameException::class.java)
}
it("should leave memory unreleased") {
verifyMemoryNotReleased(input)
}
}
given("valid input") {
val input = WireFrameMessage(samplePayload)
it("should yield decoded input frame") {
createInstance().decode(input).test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.verifyComplete()
}
}
given("valid input with part of next frame") {
val input = Unpooled.buffer()
.writeBytes(encoder.encode(WireFrameMessage(samplePayload)))
.writeBytes(encoder.encode(WireFrameMessage(samplePayload)).slice(0, 3))
it("should yield decoded input frame") {
createInstance().decode(input).test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.verifyComplete()
}
it("should leave memory unreleased") {
verifyMemoryNotReleased(input)
}
}
given("valid input with garbage after it") {
val input = Unpooled.buffer()
.writeBytes(encoder.encode(WireFrameMessage(samplePayload)))
.writeBytes(Unpooled.wrappedBuffer(samplePayload))
it("should yield decoded input frame and error") {
createInstance().decode(input).test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.verifyError(WireFrameException::class.java)
}
it("should leave memory unreleased") {
verifyMemoryNotReleased(input)
}
}
given("two inputs containing two separate messages") {
val input1 = encoder.encode(WireFrameMessage(samplePayload))
val input2 = encoder.encode(WireFrameMessage(anotherPayload))
it("should yield decoded input frames") {
val cut = createInstance()
cut.decode(input1).test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.verifyComplete()
cut.decode(input2).test()
.expectNextMatches { it.payloadSize == anotherPayload.size }
.verifyComplete()
}
it("should release memory") {
verifyMemoryReleased(input1, input2)
}
}
given("1st input containing 1st frame and 2nd input containing garbage") {
val input1 = encoder.encode(WireFrameMessage(samplePayload))
val input2 = Unpooled.wrappedBuffer(anotherPayload)
it("should yield decoded input frames") {
val cut = createInstance()
cut.decode(input1)
.test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.verifyComplete()
cut.decode(input2).test()
.verifyError(WireFrameException::class.java)
}
it("should release memory for 1st input") {
verifyMemoryReleased(input1)
}
it("should leave memory unreleased for 2nd input") {
verifyMemoryNotReleased(input2)
}
}
given("1st input containing 1st frame + part of 2nd frame and 2nd input containing rest of 2nd frame") {
val frame1 = encoder.encode(WireFrameMessage(samplePayload))
val frame2 = encoder.encode(WireFrameMessage(anotherPayload))
val input1 = Unpooled.buffer()
.writeBytes(frame1)
.writeBytes(frame2, 3)
val input2 = Unpooled.buffer().writeBytes(frame2)
it("should yield decoded input frames") {
val cut = createInstance()
cut.decode(input1).test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.verifyComplete()
cut.decode(input2).test()
.expectNextMatches { it.payloadSize == anotherPayload.size }
.verifyComplete()
}
it("should release memory") {
verifyMemoryReleased(input1, input2)
}
}
given("1st input containing part of 1st frame and 2nd input containing rest of 1st + 2nd frame") {
val frame1 = encoder.encode(WireFrameMessage(samplePayload))
val frame2 = encoder.encode(WireFrameMessage(anotherPayload))
val input1 = Unpooled.buffer()
.writeBytes(frame1, 5)
val input2 = Unpooled.buffer()
.writeBytes(frame1)
.writeBytes(frame2)
it("should yield decoded input frames") {
val cut = createInstance()
cut.decode(input1).test()
.verifyComplete()
cut.decode(input2).test()
.expectNextMatches { it.payloadSize == samplePayload.size }
.expectNextMatches { it.payloadSize == anotherPayload.size }
.verifyComplete()
}
it("should release memory") {
verifyMemoryReleased(input1, input2)
}
}
}
})
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