Extended sample groovy dsl with placeholders

accurest-core/src/main/groovy/io/coderate/accurest/builder/SpockMethodBodyBuilder.groovy

@@ -44,6 +44,8 @@ class SpockMethodBodyBuilder {
 			blockBuilder.addLine("response.header('$it.key') == '$it.value'")
 		}
 		if (stubDefinition.response.body) {
+			blockBuilder.endBlock()
+			blockBuilder.addLine('and:').startBlock()
 			blockBuilder.addLine('def responseBody = new JsonSlurper().parseText(response.body.asString())')
 			stubDefinition.response.body.serverValue.each {
 				def value = it.value

accurest-core/src/test/resources/dsl/basic/sampleDsl.groovy

@@ -6,7 +6,8 @@ io.coderate.accurest.dsl.GroovyDsl.make {
 		}
 		body("""\
           {
-            "name": "Jan"
+            "name": "Jan",
+            "id": "${value(client('abc'), server('def'))}",
           }
           """
 		)
@@ -16,10 +17,12 @@ io.coderate.accurest.dsl.GroovyDsl.make {
 		status 200
 		body("""\
           {
-            "name": "Jan"
+            "name": "Jan",
+            "id": "${value(client('123'), server('321'))}",
+						"surname": "${value(client('Kowalsky'), server('$checkIfSurnameValid($value)'))}"
           }
           """
-				)
+		)
 		headers {
 			header 'Content-Type': 'text/plain'
 		}