Fixed the unnecessary isEmpty generation; fixes gh-727

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

@@ -981,4 +981,49 @@ DocumentContext parsedJson = JsonPath.parse(json);
 			"JaxRsClientJUnitMethodBodyBuilder"                  | { Contract dsl -> new JaxRsClientJUnitMethodBodyBuilder(dsl, properties) }
 	}
 
+	@Issue("#727")
+	def "should not leave empty arrays [#methodBuilderName]"() {
+		given:
+			Contract contractDsl = Contract.make {
+				request {
+					method 'GET'
+					url '/list'
+				}
+				response {
+					status 200
+					body(
+							[
+									content: [
+											one: "two",
+											two: "two",
+											three: [
+													six: "seven"
+											]
+									]
+							]
+					)
+					bodyMatchers {
+						jsonPath('$.content.three.six', byRegex(".*seven.*"))
+						jsonPath('$.content.one', byRegex(".*two.*"))
+					}
+				}
+			}
+			MethodBodyBuilder builder = methodBuilder(contractDsl)
+			BlockBuilder blockBuilder = new BlockBuilder(" ")
+		when:
+			builder.appendTo(blockBuilder)
+		then:
+			String test = blockBuilder.toString()
+			SyntaxChecker.tryToCompileWithoutCompileStatic(methodBuilderName, test)
+			!test.contains('''.isEmpty()''')
+		and:
+			stubMappingIsValidWireMockStub(contractDsl)
+		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) }
+	}
+
 }