Use controllers via MockMvc in Spring integration tests (#2447)

* Use controllers via `MockMvc` in concrete execution and update result models

* Make `createGetMockMvcResponseModel` work when there's no `@RequestMapping` on controller class

* Introduce `executableToCall`

* Replace `executableToCall` with `MockMvc.perform` for Spring controllers

* Remove handling of Spring controllers from `SpringUtExecutionInstrumentation`

* Add `utCustomModelConstructorFinder` property to `UtModelConstructor`

* Add `UtSpringMockMvcResultActionsModel` and its `UtCustomModelConstructor`

* Add `UtCustomModel` (i.e. common parent of all framework specific models)

* Properly handle `UtCustomModel`

* Add `origin` to `UtSpringMockMvcResultActionsModel`

* Split `CgMethodTestSet.executableId` into `executableUnderTest` and `executablesToCall`

* Enable `UtMockMvcResultActionsModelConstructor` for subtypes of `ResultActions`

* Add `CgCustomAssertConstructor` to `CgComponents`

* Add custom asserts for `MockMvc.perform()` result

* Remove redundant code

* Handle `modelTagName` for `UtCustomModel`

* Fix compilation after rebase

* Fix JS compilation

* Address comments in #2447

Author: IlyaMuravjov

utbot-framework-api/src/main/kotlin/org/utbot/framework/plugin/api/Api.kt

@@ -142,6 +142,8 @@ abstract class UtExecution(
         testMethodName: String? = this.testMethodName,
         displayName: String? = this.displayName,
     ): UtExecution
+
+    val executableToCall get() = stateBefore.executableToCall
 }
 
 /**
@@ -287,11 +289,33 @@ class UtFailedExecution(
     }
 }
 
+/**
+ * @property executableToCall executable that is called in the test body and whose result is used in asserts as `actual`.
+ *
+ * Most often [executableToCall] is just method under test, but it may be changed to different executable if more
+ * appropriate way of calling specific method is found (for example, Spring controller methods are called via `MockMvc`).
+ *
+ * `null` value of [executableToCall] indicates that method under test should be called in the test body.
+ */
 open class EnvironmentModels(
     val thisInstance: UtModel?,
     val parameters: List<UtModel>,
-    val statics: Map<FieldId, UtModel>
+    val statics: Map<FieldId, UtModel>,
+    val executableToCall: ExecutableId?,
 ) {
+    @Deprecated("Now `executableToCall` also need to be passed to `EnvironmentModels` constructor " +
+            "(see more details in `EnvironmentModels` class documentation)", level = DeprecationLevel.ERROR)
+    constructor(
+        thisInstance: UtModel?,
+        parameters: List<UtModel>,
+        statics: Map<FieldId, UtModel>,
+    ) : this(
+        thisInstance = thisInstance,
+        parameters = parameters,
+        statics = statics,
+        executableToCall = null,
+    )
+
     override fun toString() = buildString {
         append("this=$thisInstance")
         appendOptional("parameters", parameters)
@@ -305,8 +329,9 @@ open class EnvironmentModels(
     fun copy(
         thisInstance: UtModel? = this.thisInstance,
         parameters: List<UtModel> = this.parameters,
-        statics: Map<FieldId, UtModel> = this.statics
-    ) = EnvironmentModels(thisInstance, parameters, statics)
+        statics: Map<FieldId, UtModel> = this.statics,
+        executableToCall: ExecutableId? = this.executableToCall,
+    ) = EnvironmentModels(thisInstance, parameters, statics, executableToCall)
 }
 
 /**
@@ -315,7 +340,8 @@ open class EnvironmentModels(
 object MissingState : EnvironmentModels(
     thisInstance = null,
     parameters = emptyList(),
-    statics = emptyMap()
+    statics = emptyMap(),
+    executableToCall = null,
 )
 
 /**
@@ -550,6 +576,21 @@ data class UtArrayModel(
     override fun hashCode(): Int = id
 }
 
+/**
+ * Wrapper of [origin] model, that can be handled in a different
+ * way in some situations (e.g. during value construction).
+ */
+sealed class UtModelWithCompositeOrigin(
+    id: Int?,
+    classId: ClassId,
+    modelName: String = id.toString(),
+    open val origin: UtCompositeModel?,
+) : UtReferenceModel(
+    id = id,
+    classId = classId,
+    modelName = modelName
+)
+
 /**
  * Model for complex objects with assemble instructions.
  *
@@ -564,8 +605,8 @@ data class UtAssembleModel private constructor(
     override val modelName: String,
     val instantiationCall: UtStatementCallModel,
     val modificationsChain: List<UtStatementModel>,
-    val origin: UtCompositeModel?
-) : UtReferenceModel(id, classId, modelName) {
+    override val origin: UtCompositeModel?
+) : UtModelWithCompositeOrigin(id, classId, modelName, origin) {
 
     /**
      * Creates a new [UtAssembleModel].
@@ -703,7 +744,17 @@ class UtLambdaModel(
     }
 }
 
-object UtSpringContextModel : UtReferenceModel(
+/**
+ * Common parent of all framework-specific models (e.g. Spring-specific models)
+ */
+abstract class UtCustomModel(
+    id: Int?,
+    classId: ClassId,
+    modelName: String = id.toString(),
+    override val origin: UtCompositeModel? = null,
+) : UtModelWithCompositeOrigin(id, classId, modelName, origin)
+
+object UtSpringContextModel : UtCustomModel(
     id = null,
     classId = SpringModelUtils.applicationContextClassId,
     modelName = "applicationContext"
@@ -721,6 +772,23 @@ data class SpringRepositoryId(
     val entityClassId: ClassId,
 )
 
+class UtSpringMockMvcResultActionsModel(
+    id: Int?,
+    origin: UtCompositeModel?,
+    val status: Int,
+    val errorMessage: String?,
+    val contentAsString: String,
+    val viewName: String?,
+    // model for mvcResult.modelAndView?.model
+    val model: UtModel?
+    // TODO add headers and other data
+) : UtCustomModel(
+    origin = origin,
+    classId = SpringModelUtils.resultActionsClassId,
+    id = id,
+    modelName = "mockMvcResultActions@$id"
+)
+
 /**
  * Model for a step to obtain [UtAssembleModel].
  */