Add the configuration key for multipart/form-data support, before implementing the feature.

core-tests/e2e-tests/spring/spring-rest-h2-v1/src/test/java/org/evomaster/e2etests/spring/examples/adaptivehypermutation/DeterminismTest.java

@@ -28,7 +28,7 @@ public void testDeterminismOfLog(boolean enableConstraintHandling){
         OpenAPI schema = (new OpenAPIParser()).readLocation("swagger-ahm/ahm.json", null, null).getOpenAPI();
         isDeterminismConsumer( new ArrayList<>(), (args) -> RestActionBuilderV3.INSTANCE
                 .getModelsFromSwagger(schema, new LinkedHashMap<>(),
-                        new RestActionBuilderV3.Options(false,enableConstraintHandling,false,0.0,0.0,true,false,false)));
+                        new RestActionBuilderV3.Options(false,enableConstraintHandling,false,0.0,0.0,true,false,false,true)));
     }
 
 

core-tests/jdk-8/spring-rest-openapi-v2-tests/src/test/java/org/evomaster/e2etests/spring/examples/adaptivehypermutation/DeterminismTest.java

@@ -27,7 +27,7 @@ public void testDeterminismOfLog(boolean enableConstraintHandling){
         OpenAPI schema = (new OpenAPIParser()).readLocation("swagger-ahm/ahm.json", null, null).getOpenAPI();
         isDeterminismConsumer( new ArrayList<>(), (args) -> {
             RestActionBuilderV3.INSTANCE.getModelsFromSwagger(schema, new LinkedHashMap<>(),
-                    new RestActionBuilderV3.Options(false,enableConstraintHandling,false,0.0,0.0,true,false,false));
+                    new RestActionBuilderV3.Options(false,enableConstraintHandling,false,0.0,0.0,true,false,false,true));
         });
     }
 

core/src/main/kotlin/org/evomaster/core/EMConfig.kt

@@ -1378,6 +1378,10 @@ class EMConfig {
             "Only available for JVM languages")
     var dtoForRequestPayload = false
 
+    @Experimental
+    @Cfg("Enable multipart/form-data support when building REST actions.")
+    var enableMultipartFormDataSupport = false
+
     @Important(6.0)
     @Cfg("Host name or IP address of where the SUT EvoMaster Controller Driver is listening on." +
             " This option is only needed for white-box testing.")

core/src/main/kotlin/org/evomaster/core/problem/rest/builder/RestActionBuilderV3.kt

@@ -117,6 +117,8 @@ object RestActionBuilderV3 {
         val enableAdvancedFormats: Boolean = true,
 
         val inferFormatFromNames: Boolean = true,
+
+        val enableMultipartFormDataSupport: Boolean = false,
     ){
         constructor(config: EMConfig): this(
             enableConstraintHandling = config.enableSchemaConstraintHandling,
@@ -125,7 +127,8 @@ object RestActionBuilderV3 {
             probUseExamples = config.probRestExamples,
             usingWhiteBox = !config.blackBox,
             enableAdvancedFormats = config.enableAdvancedFormats,
-            inferFormatFromNames = config.inferFormatFromNames
+            inferFormatFromNames = config.inferFormatFromNames,
+            enableMultipartFormDataSupport = config.enableMultipartFormDataSupport,
         )
 
         init {

core/src/test/kotlin/org/evomaster/core/problem/rest/RestActionBuilderV3Test.kt

@@ -47,6 +47,14 @@ class RestActionBuilderV3Test{
         RestActionBuilderV3.cleanCache()
     }
 
+    @Test
+    fun testMultipartFormDataSupportOptionDefaultsToDisabled(){
+        val config = EMConfig()
+
+        assertFalse(config.enableMultipartFormDataSupport)
+        assertFalse(RestActionBuilderV3.Options(config).enableMultipartFormDataSupport)
+        assertTrue(RestActionBuilderV3.Options(enableMultipartFormDataSupport = true).enableMultipartFormDataSupport)
+    }
 
     @Test
     fun testDtoIssueWithWronglyHandledField(){

docs/options.md

@@ -289,6 +289,7 @@ There are 3 types of options:
 |`enableAdvancedFormats`| __Boolean__. Whether to enable the handling of new type formats in OpenAPI schemas, e.g., the ones introduced in 3.1.0. *Default value*: `false`.|
 |`enableCustomizedMethodForMockObjectHandling`| __Boolean__. Whether to apply customized method (i.e., implement 'customizeMockingRPCExternalService' for external services or 'customizeMockingDatabase' for database) to handle mock object. *Default value*: `false`.|
 |`enableCustomizedMethodForScheduleTaskHandling`| __Boolean__. Whether to apply customized method (i.e., implement 'customizeScheduleTaskInvocation' for invoking schedule task) to invoke schedule task. *Default value*: `false`.|
+|`enableMultipartFormDataSupport`| __Boolean__. Enable multipart/form-data support when building REST actions. *Default value*: `false`.|
 |`enableRPCCustomizedTestOutput`| __Boolean__. Whether to enable customized RPC Test output if 'customizeRPCTestOutput' is implemented. *Default value*: `false`.|
 |`enableStaticFlakyInference`| __Boolean__. Specify whether to infer potential flakiness statically from response values, such as timestamps, UUIDs, hashes and runtime-specific messages. *Depends on*: `handleFlakiness=true`. *Default value*: `true`.|
 |`enableWriteSnapshotTests`| __Boolean__. Enable to print snapshots of the generated tests during the search in an interval defined in snapshotsInterval. *Default value*: `false`.|