openapi-processor/openapi-processor-spring#126, avoid duplicates

(cherry picked from commit 81e5eb0)

Author: hauner

src/main/kotlin/io/openapiprocessor/core/model/Endpoint.kt

@@ -60,19 +60,18 @@ class Endpoint(
     }
 
     /**
-     * provides a list of all consumed content types of this endpoint including multipart/form-data.
+     * provides a set of all consumed content types of this endpoint including multipart/form-data.
      *
      * multipart/form-data is special because a multipart request body with multiple properties is
      * converted to multiple {@link MultipartParameter}s in the internal model. The request body
      * information is no longer available.
      *
-     * @return the list of content types
+     * @return the set of content types
      */
-    fun getConsumesContentTypes(): List<String> {
+    fun getConsumesContentTypes(): Set<String> {
         val contentTypes = requestBodies
             .map { it.contentType }
-            .toSet()
-            .toMutableList()
+            .toMutableSet()
 
         val multipart = parameters.find {
             it is MultipartParameter

src/test/groovy/com/github/hauner/openapi/core/model/EndpointContentTypesSpec.groovy

@@ -22,10 +22,10 @@ class EndpointContentTypesSpec extends Specification {
         }
 
         expect:
-        endpoint.consumesContentTypes == []
+        endpoint.consumesContentTypes == [] as Set
     }
 
-    void "provides consuming content types" () {
+    void "provides distinct consuming content types" () {
         def endpoint = endpoint('/foo', HttpMethod.GET) { e ->
             e.parameters () { ps ->
                 ps.body("body", "text/plain", new StringDataType())
@@ -56,7 +56,7 @@ class EndpointContentTypesSpec extends Specification {
         }
 
         expect:
-        endpoint.consumesContentTypes == ['multipart/form-data']
+        endpoint.consumesContentTypes == ['multipart/form-data'] as Set
     }
 
     void "provides no producing content types without response" () {