Added missing test

spring-cloud-contract-verifier/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MockMvcMethodBodyBuilderSpec.groovy

@@ -2747,4 +2747,39 @@ DocumentContext parsedJson = JsonPath.parse(json);
 			"JaxRsClientJUnitMethodBodyBuilder"                  | { Contract dsl -> new JaxRsClientJUnitMethodBodyBuilder(dsl, properties) }                  | { String body -> body.contains('assertThat(response.getHeaderString("My-UUID")).isEqualTo(property("my-uuid"));') }
 	}
 
+	@Issue('#554')
+	def "should create an assertion for an empty map or Object for [#methodBuilderName]"() {
+		given:
+			Contract contractDsl = Contract.make {
+				request {
+					method 'GET'
+					url '/api/v1/xxxx'
+				}
+				response {
+					status 200
+					body([
+							aMap      : ["foo": "bar"],
+							anEmptyMap: [:]
+					])
+				}
+			}
+			MethodBodyBuilder builder = methodBuilder(contractDsl)
+			BlockBuilder blockBuilder = new BlockBuilder(" ")
+		and:
+			builder.appendTo(blockBuilder)
+			String test = blockBuilder.toString()
+		when:
+			SyntaxChecker.tryToRun(methodBuilderName, test.join("\n"))
+		then:
+			test.contains('''assertThatJson(parsedJson).field("['aMap']").field("['foo']").isEqualTo("bar")''')
+			test.contains('''assertThatJson(parsedJson).field("['anEmptyMap']").isEmpty()''')
+		where:
+			methodBuilderName                                    | methodBuilder
+			"MockMvcSpockMethodBuilder"                          | { Contract dsl -> new MockMvcSpockMethodRequestProcessingBodyBuilder(dsl, properties) }
+			"MockMvcJUnitMethodBuilder"                          | { Contract dsl -> new MockMvcJUnitMethodBodyBuilder(dsl, properties) }
+			"JaxRsClientSpockMethodRequestProcessingBodyBuilder" | { Contract dsl -> new JaxRsClientSpockMethodRequestProcessingBodyBuilder(dsl, properties) }
+			"JaxRsClientJUnitMethodBodyBuilder"                  | { Contract dsl -> new JaxRsClientJUnitMethodBodyBuilder(dsl, properties) }
+	}
+
+
 }