Update ContainerModule load to support sync load functions

.changeset/slimy-otters-sparkle.md

@@ -0,0 +1,5 @@
+---
+"@inversifyjs/container": minor
+---
+
+Updated `ContainerModule.load` to support sync load functions

packages/container/libraries/container/src/container/models/ContainerModule.spec.ts

@@ -36,14 +36,23 @@ describe(ContainerModule.name, () => {
 
   describe('.load', () => {
     describe('when called', () => {
+      let optionsFixture: ContainerModuleLoadOptions;
+
       let result: unknown;
 
-      beforeAll(() => {
-        result = new ContainerModule(loadMock).load;
+      beforeAll(async () => {
+        optionsFixture = Symbol() as unknown as ContainerModuleLoadOptions;
+
+        result = await new ContainerModule(loadMock).load(optionsFixture);
+      });
+
+      it('should call load()', () => {
+        expect(loadMock).toHaveBeenCalledTimes(1);
+        expect(loadMock).toHaveBeenCalledWith(optionsFixture);
       });
 
       it('should return expected value', () => {
-        expect(result).toBe(loadMock);
+        expect(result).toBeUndefined();
       });
     });
   });

packages/container/libraries/container/src/container/models/ContainerModule.ts

@@ -24,9 +24,11 @@ export interface ContainerModuleLoadOptions {
 
 export class ContainerModule {
   readonly #id: number;
-  readonly #load: (options: ContainerModuleLoadOptions) => Promise<void>;
+  readonly #load: (options: ContainerModuleLoadOptions) => void | Promise<void>;
 
-  constructor(load: (options: ContainerModuleLoadOptions) => Promise<void>) {
+  constructor(
+    load: (options: ContainerModuleLoadOptions) => void | Promise<void>,
+  ) {
     this.#id = getContainerModuleId();
     this.#load = load;
   }
@@ -35,7 +37,7 @@ export class ContainerModule {
     return this.#id;
   }
 
-  public get load(): (options: ContainerModuleLoadOptions) => Promise<void> {
-    return this.#load;
+  public async load(options: ContainerModuleLoadOptions): Promise<void> {
+    await this.#load(options);
   }
 }