feat: Add a method for binary data in the Java DSL

consumer/junit/src/test/groovy/au/com/dius/pact/consumer/junit/BinaryFileSpec.groovy

@@ -17,13 +17,14 @@ class BinaryFileSpec {
 
   @Pact(provider = 'File Service', consumer= 'PDF Consumer')
   RequestResponsePact createPact(PactDslWithProvider builder) {
+    def pdf = BinaryFileSpec.getResourceAsStream('/sample.pdf').bytes
     builder
       .uponReceiving('a request for a PDF')
       .path('/get-file')
       .method('GET')
       .willRespondWith()
       .status(200)
-      .body('0111010001110111', 'application/pdf')
+      .withBinaryData(pdf, 'application/pdf')
       .toPact()
   }
 
@@ -37,7 +38,8 @@ class BinaryFileSpec {
         .build()
       def response = httpclient.execute(request)
       assert response.statusLine.statusCode == 200
-      assert new String(response.entity.content.bytes) == '0111010001110111'
+      assert response.entity.contentType.value == 'application/pdf'
+      assert response.entity.content.bytes[0..7] == [37, 80, 68, 70, 45, 49, 46, 53] as byte[]
     }
   }
 }

consumer/src/main/java/au/com/dius/pact/consumer/dsl/PactDslResponse.java

@@ -30,6 +30,7 @@
 import java.util.function.Supplier;
 import java.util.regex.Pattern;
 
+import static au.com.dius.pact.consumer.Headers.MULTIPART_HEADER_REGEX;
 import static com.google.common.collect.Lists.newArrayList;
 
 public class PactDslResponse {
@@ -274,6 +275,17 @@ public PactDslResponse body(Document body) throws TransformerException {
       return this;
     }
 
+  /**
+   * Response body as a binary data.
+   * @param example Example contents to use in the consumer test
+   * @param contentType Content type of the data
+   */
+  public PactDslResponse withBinaryData(byte[] example, String contentType) {
+    responseBody = OptionalBody.body(example, au.com.dius.pact.core.model.ContentType.fromString(contentType));
+    responseHeaders.put(CONTENT_TYPE, Collections.singletonList(contentType));
+    return this;
+  }
+
     /**
      * Match a response header. A random example header value will be generated from the provided regular expression.
      *