Okhttp silent retry when idempotent request fails on reused connection

okhttp-silent-retry.kt

import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.logging.HttpLoggingInterceptor
import okhttp3.mockwebserver.MockResponse
import okhttp3.mockwebserver.MockWebServer
import okhttp3.mockwebserver.SocketPolicy
import org.junit.Assert.assertThat
import kotlin.test.assertEquals

fun main() {
    val server = MockWebServer()
    server.start()

    server.enqueue(MockResponse().setBody("a"))
    server.enqueue(MockResponse().setBody("aa"))
    server.enqueue(MockResponse().setSocketPolicy(SocketPolicy.DISCONNECT_AFTER_REQUEST))
    server.enqueue(MockResponse().setSocketPolicy(SocketPolicy.DISCONNECT_AFTER_REQUEST))
    server.enqueue(MockResponse().setBody("b"))

    val request = Request.Builder()
            .url(server.url("/"))
            .build()

    val client = OkHttpClient.Builder()
            .build()

    val responseA = client.newCall(request).execute()
    assertEquals("a", responseA.body()!!.string())
    assertEquals(0, server.takeRequest().getSequenceNumber())

    val responseAA = client.newCall(request).execute()
    assertEquals("aa", responseAA.body()!!.string())
    assertEquals(1, server.takeRequest().getSequenceNumber())

    val responseB = client.newCall(request).execute()
    assertEquals("b", responseB.body()!!.string())
    assertEquals(2, server.takeRequest().getSequenceNumber())
    assertEquals(0, server.takeRequest().getSequenceNumber())
    assertEquals(0, server.takeRequest().getSequenceNumber())
}