Merge pull request #66 from datalorax/auth_intercept

Fixes #54: Add hashCode and equals to AuthenticationInterceptor

src/main/java/com/binance/api/client/impl/BinanceApiServiceGenerator.java

@@ -19,7 +19,7 @@
  */
 public class BinanceApiServiceGenerator {
 
-    private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
+    static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
 
     private static Retrofit.Builder builder =
         new Retrofit.Builder()

src/main/java/com/binance/api/client/security/AuthenticationInterceptor.java

@@ -10,6 +10,7 @@
 import org.apache.commons.lang3.StringUtils;
 
 import java.io.IOException;
+import java.util.Objects;
 
 /**
  * A request interceptor that injects the API Key Header into requests, and signs messages, whenever required.
@@ -74,4 +75,18 @@ private static String bodyToString(RequestBody request) {
             throw new RuntimeException(e);
         }
     }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        final AuthenticationInterceptor that = (AuthenticationInterceptor) o;
+        return Objects.equals(apiKey, that.apiKey) &&
+                Objects.equals(secret, that.secret);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(apiKey, secret);
+    }
 }

src/test/java/com/binance/api/client/impl/BinanceApiServiceGeneratorTest.java

@@ -0,0 +1,24 @@
+package com.binance.api.client.impl;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author andy coates
+ * created 08/02/2018.
+ */
+public class BinanceApiServiceGeneratorTest {
+    @Test
+    public void shouldOnlyAddAuthInterceptorOnce() throws Exception {
+        // Given:
+        BinanceApiServiceGenerator.createService(BinanceApiService.class, "someKey", "someValue");
+        final int initialSize = BinanceApiServiceGenerator.httpClient.interceptors().size();
+
+        // When:
+        BinanceApiServiceGenerator.createService(BinanceApiService.class, "someKey", "someValue");
+
+        // Then
+        assertEquals(BinanceApiServiceGenerator.httpClient.interceptors().size(), initialSize);
+    }
+}