binancej/src/test/java/com/sigmaflare/binancej/OrderBookDepthTests.java

package com.sigmaflare.binancej;

import com.codepoetics.ambivalence.Either;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.sigmaflare.binancej.entities.OrderBookDepth;
import com.sigmaflare.binancej.entities.ServiceError;
import com.sigmaflare.binancej.exceptions.BinanceServiceUnreachableException;
import com.sigmaflare.binancej.matchers.GetMatcher;
import org.apache.commons.io.FileUtils;
import org.apache.http.ProtocolVersion;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.entity.BasicHttpEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.message.BasicStatusLine;
import org.junit.Before;
import org.junit.Test;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

import static com.sigmaflare.binancej.Constant.BASE_ENDPOINT;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.argThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class OrderBookDepthTests {
    private static ObjectMapper mapper = Helpers.objectMapperBuilder();
    private final String url = String.format("%s%s", BASE_ENDPOINT, "/api/v1/depth?symbol=ETHBTC&limit=100");
    private final String urlWithLimit = String.format("%s%s", BASE_ENDPOINT, "/api/v1/depth?symbol=ETHBTC&limit=1000");

    private OrderBookDepth orderBookDepth;
    private String orderBookDepthJson;

    @Before
    public void setUp() throws IOException {
        ClassLoader classLoader = ExchangeInfoMethodTests.class.getClassLoader();
        File file = new File(classLoader.getResource("orderbook_depth_sample.json").getFile());

        orderBookDepthJson = FileUtils.readFileToString(file, "UTF-8");

        orderBookDepth =
            mapper.readValue(orderBookDepthJson, OrderBookDepth.class);
    }

    @Test
    public void TestOrderBookDepthReturnsSuccessfully() throws IOException, BinanceServiceUnreachableException {
        CloseableHttpClient mockedCloseableHttpClient = mock(CloseableHttpClient.class);
        CloseableHttpResponse mockedCloseableHttpResponse = mock(CloseableHttpResponse.class);

        when(mockedCloseableHttpResponse.getStatusLine())
            .thenReturn(new BasicStatusLine(new ProtocolVersion("TEST", 1, 0),
                200, "test"));

        when(mockedCloseableHttpClient.execute(argThat(new GetMatcher(url, "1234"))))
            .thenReturn(mockedCloseableHttpResponse);

        BasicHttpEntity httpEntity = new BasicHttpEntity();

        // This changes from the usual way we do this because we do post-processing in the deserializer and the JSON
        // will no longer match the stringified OrderBookDepth.
        httpEntity.setContent(new ByteArrayInputStream(orderBookDepthJson.getBytes()));


        when(mockedCloseableHttpResponse.getEntity()).thenReturn(httpEntity);

        MarketData marketData = new MarketData("1234", "abcd", mockedCloseableHttpClient);

        Either<ServiceError, OrderBookDepth> res = marketData.getOrderBookDepth("ETHBTC");

        assertTrue(res.isRight());
        assertEquals(Helpers.extractEitherValueSafely(res.right()), orderBookDepth);

    }

    @Test(expected = BinanceServiceUnreachableException.class)
    public void TestOrderBookDepthWithNoHttpEntityFails() throws IOException, BinanceServiceUnreachableException {
        CloseableHttpClient mockedCloseableHttpClient = mock(CloseableHttpClient.class);
        CloseableHttpResponse mockedCloseableHttpResponse = mock(CloseableHttpResponse.class);

        when(mockedCloseableHttpResponse.getStatusLine())
            .thenReturn(new BasicStatusLine(new ProtocolVersion("TEST", 1, 0),
                200, "test"));

        when(mockedCloseableHttpClient.execute(argThat(new GetMatcher(urlWithLimit, "1234"))))
            .thenReturn(mockedCloseableHttpResponse);

        MarketData marketData = new MarketData("1234", "abcd", mockedCloseableHttpClient);

        marketData.getOrderBookDepth("ETHBTC", 1000);
    }

    @Test
    public void TestOrderBookDepthWithBadApiKeyReturns400() throws IOException, BinanceServiceUnreachableException {
        CloseableHttpClient mockedCloseableHttpClient = mock(CloseableHttpClient.class);
        CloseableHttpResponse mockedCloseableHttpResponse = mock(CloseableHttpResponse.class);

        when(mockedCloseableHttpResponse.getStatusLine())
            .thenReturn(new BasicStatusLine(new ProtocolVersion("TEST", 1, 0),
                400, "Bad API Key"));

        when(mockedCloseableHttpClient.execute(argThat(new GetMatcher(urlWithLimit, "1234"))))
            .thenReturn(mockedCloseableHttpResponse);

        ServiceError serviceError = ServiceError.builder().code(400).message("Bad API Key").build();

        MarketData marketData = new MarketData("1234", "abcd", mockedCloseableHttpClient);

        BasicHttpEntity httpEntity = new BasicHttpEntity();
        httpEntity.setContent(new ByteArrayInputStream(
            mapper.writeValueAsString(serviceError).getBytes(StandardCharsets.UTF_8)));


        when(mockedCloseableHttpResponse.getEntity()).thenReturn(httpEntity);

        Either<ServiceError, OrderBookDepth> res = marketData.getOrderBookDepth("ETHBTC", 1000);

        assertTrue(res.isLeft());
        assertEquals(Helpers.extractEitherValueSafely(res.left()), serviceError);
    }
}