Response.isSuccessful().

okhttp-tests/src/test/java/com/squareup/okhttp/CallTest.java

@@ -95,6 +95,7 @@ public final class CallTest {
 
     executeSynchronously(request)
         .assertCode(200)
+        .assertSuccessful()
         .assertHeader("Content-Type", "text/plain")
         .assertBody("abc");
 
@@ -105,6 +106,19 @@ public final class CallTest {
     assertNull(recordedRequest.getHeader("Content-Length"));
   }
 
+  @Test public void getReturns500() throws Exception {
+    server.enqueue(new MockResponse().setResponseCode(500));
+    server.play();
+
+    Request request = new Request.Builder()
+        .url(server.getUrl("/"))
+        .build();
+
+    executeSynchronously(request)
+        .assertCode(500)
+        .assertNotSuccessful();
+  }
+
   @Test public void get_SPDY_3() throws Exception {
     enableProtocol(Protocol.SPDY_3);
     get();

okhttp-tests/src/test/java/com/squareup/okhttp/RecordedResponse.java

@@ -19,8 +19,10 @@
 import java.util.Arrays;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 
 /**
  * A received response or failure recorded by the response recorder.
@@ -53,6 +55,16 @@ public RecordedResponse assertCode(int expectedCode) {
     return this;
   }
 
+  public RecordedResponse assertSuccessful() {
+    assertTrue(response.isSuccessful());
+    return this;
+  }
+
+  public RecordedResponse assertNotSuccessful() {
+    assertFalse(response.isSuccessful());
+    return this;
+  }
+
   public RecordedResponse assertHeader(String name, String... values) {
     assertEquals(Arrays.asList(values), response.headers(name));
     return this;

okhttp/src/main/java/com/squareup/okhttp/Response.java

@@ -87,6 +87,14 @@ public int code() {
     return code;
   }
 
+  /**
+   * Returns true if the code is in [200..300), which means the request was
+   * successfully received, understood, and accepted.
+   */
+  public boolean isSuccessful() {
+    return code >= 200 && code < 300;
+  }
+
   /** Returns the HTTP status message or null if it is unknown. */
   public String message() {
     return message;