first commit

packages/core/test/utils.ts

@@ -0,0 +1,25 @@
+import type { Constructable } from '@n8n/di';
+import { Container } from '@n8n/di';
+import { mock } from 'jest-mock-extended';
+import { Duplex } from 'stream';
+import type { DeepPartial } from 'ts-essentials';
+
+export const mockInstance = <T>(
+	constructor: Constructable<T>,
+	data: DeepPartial<T> | undefined = undefined,
+) => {
+	const instance = mock<T>(data);
+	Container.set(constructor, instance);
+	return instance;
+};
+
+export function toStream(buffer: Buffer) {
+	const duplexStream = new Duplex();
+	duplexStream.push(buffer);
+	duplexStream.push(null);
+
+	return duplexStream;
+}
+
+export const toFileId = (workflowId: string, executionId: string, fileUuid: string) =>
+	`workflows/${workflowId}/executions/${executionId}/binary_data/${fileUuid}`;