chore(docs): Added docstring to testing util functions

tests/utils/test-support.ts

@@ -3,21 +3,38 @@ import { DefineDeclaration, NodeType, ObjectDeclaration, ParserValue, Program, R
 
 export class TestSupport {
 
-    // runtime
-
+    /**
+     * Expects the given generic runtime value to be of the given type
+     * 
+     * @param value generic runtime value to assert
+     * @param type expected type of the runtime value
+     * @returns runtime value of the given type
+     */
     public static expectValue<T extends RuntimeValue>(value: RuntimeValue | undefined, type: ValueType): T {
         expect(value).toBeDefined();
         expect(value!.type).toBe(type);
         return value! as T;
     }
 
-    // parser
-
+    /**
+     * Expects the given generic AST node to be of the given type
+     * 
+     * @param node generic AST node to assert
+     * @param type expected type of the AST node
+     * @returns AST node of the given type
+     */
     public static expectNode<T extends ParserValue>(node: ParserValue, type: NodeType): T {
         expect(node.type).toBe(type);
         return node as T;
     }
 
+    /**
+     * Expects an object declaration with the given identifier to be present in the given program AST node
+     * 
+     * @param program program AST node to search the object declaration in
+     * @param identifier identifier of the object declaration to find
+     * @returns object declaration AST node
+     */
     public static expectAgentDeclaration(program: Program, identifier: string): ObjectDeclaration {
         expect(program.body.length).not.toBe(0);
 
@@ -34,6 +51,14 @@ export class TestSupport {
         return agentDeclaration!;
     }
 
+    /**
+     * Expects an variable declaration with the given identifier to be present in the given program AST node in an object declaration with the given identifier
+     * 
+     * @param program program AST node to search the variable declaration in
+     * @param agentIdentifier identifier of the object declaration AST node to search in
+     * @param identifier identifier of the variable declaration to find
+     * @returns variable declaration AST node
+     */
     public static expectPropertyDeclaration(program: Program, agentIdentifier: string, identifier: string): VariableDeclaration {
         const agentDeclaration = TestSupport.expectAgentDeclaration(program, agentIdentifier);
 
@@ -48,6 +73,13 @@ export class TestSupport {
         return propertyDeclaration!;
     }
 
+    /**
+     * Expects a define declaration with the given identifier to be present in the given program AST node
+     * 
+     * @param program program AST node to search the define declaration in
+     * @param identifier identifier of the define declaration to find
+     * @returns define declaration AST node
+     */
     public static expectDefineDeclaration(program: Program, identifier: string): DefineDeclaration {
         expect(program.body.length).not.toBe(0);