test: Add unit tests for CredentialsOverwrites

packages/cli/src/__tests__/credentials-overwrites.test.ts

@@ -0,0 +1,134 @@
+import type { GlobalConfig } from '@n8n/config';
+import { mock } from 'jest-mock-extended';
+import { UnrecognizedCredentialTypeError, type Logger } from 'n8n-core';
+import type { ICredentialType } from 'n8n-workflow';
+
+import type { CredentialTypes } from '@/credential-types';
+import { CredentialsOverwrites } from '@/credentials-overwrites';
+
+describe('CredentialsOverwrites', () => {
+	const testCredentialType = mock<ICredentialType>({ name: 'test', extends: ['parent'] });
+	const parentCredentialType = mock<ICredentialType>({ name: 'parent', extends: undefined });
+
+	const globalConfig = mock<GlobalConfig>({ credentials: { overwrite: {} } });
+	const credentialTypes = mock<CredentialTypes>();
+	const logger = mock<Logger>();
+	let credentialsOverwrites: CredentialsOverwrites;
+
+	beforeEach(() => {
+		jest.resetAllMocks();
+
+		globalConfig.credentials.overwrite.data = JSON.stringify({
+			test: { username: 'user' },
+			parent: { password: 'pass' },
+		});
+		credentialTypes.recognizes.mockReturnValue(true);
+		credentialTypes.getByName.mockImplementation((credentialType) => {
+			if (credentialType === testCredentialType.name) return testCredentialType;
+			if (credentialType === parentCredentialType.name) return parentCredentialType;
+			throw new UnrecognizedCredentialTypeError(credentialType);
+		});
+		credentialTypes.getParentTypes
+			.calledWith(testCredentialType.name)
+			.mockReturnValue([parentCredentialType.name]);
+
+		credentialsOverwrites = new CredentialsOverwrites(globalConfig, credentialTypes, logger);
+	});
+
+	it('should parse and set overwrite data from config in the constructor', () => {
+		expect(credentialsOverwrites.getAll()).toEqual({
+			parent: { password: 'pass' },
+			test: {
+				password: 'pass',
+				username: 'user',
+			},
+		});
+	});
+
+	describe('setData', () => {
+		it('should reset resolvedTypes when setting new data', () => {
+			const newData = { test: { token: 'test-token' } };
+			credentialsOverwrites.setData(newData);
+
+			expect(credentialsOverwrites.getAll()).toEqual(newData);
+		});
+	});
+
+	describe('applyOverwrite', () => {
+		it('should apply overwrites only for empty fields', () => {
+			const result = credentialsOverwrites.applyOverwrite('test', {
+				username: 'existingUser',
+				password: '',
+			});
+
+			expect(result).toEqual({
+				username: 'existingUser',
+				password: 'pass',
+			});
+		});
+
+		it('should return original data if no overwrites exist', () => {
+			const data = {
+				username: 'user1',
+				password: 'pass1',
+			};
+
+			credentialTypes.getParentTypes.mockReturnValueOnce([]);
+
+			const result = credentialsOverwrites.applyOverwrite('unknownCredential', data);
+			expect(result).toEqual(data);
+		});
+	});
+
+	describe('getOverwrites', () => {
+		it('should return undefined for unrecognized credential type', () => {
+			credentialTypes.recognizes.mockReturnValue(false);
+
+			const result = credentialsOverwrites.getOverwrites('unknownType');
+
+			expect(result).toBeUndefined();
+			expect(logger.warn).toHaveBeenCalledWith(expect.stringContaining('Unknown credential type'));
+		});
+
+		it('should cache resolved types', () => {
+			credentialsOverwrites.getOverwrites('parent');
+			const firstCall = credentialsOverwrites.getOverwrites('test');
+			const secondCall = credentialsOverwrites.getOverwrites('test');
+
+			expect(firstCall).toEqual(secondCall);
+			expect(credentialTypes.getByName).toHaveBeenCalledTimes(2);
+			// eslint-disable-next-line @typescript-eslint/dot-notation
+			expect(credentialsOverwrites['resolvedTypes']).toEqual(['parent', 'test']);
+		});
+
+		it('should merge overwrites from parent types', () => {
+			credentialTypes.getByName.mockImplementation((credentialType) => {
+				if (credentialType === 'childType')
+					return mock<ICredentialType>({ extends: ['parentType1', 'parentType2'] });
+				if (credentialType === 'parentType1') return mock<ICredentialType>({ extends: undefined });
+				if (credentialType === 'parentType2') return mock<ICredentialType>({ extends: undefined });
+				throw new UnrecognizedCredentialTypeError(credentialType);
+			});
+
+			globalConfig.credentials.overwrite.data = JSON.stringify({
+				childType: { specificField: 'childValue' },
+				parentType1: { parentField1: 'value1' },
+				parentType2: { parentField2: 'value2' },
+			});
+
+			const credentialsOverwrites = new CredentialsOverwrites(
+				globalConfig,
+				credentialTypes,
+				logger,
+			);
+
+			const result = credentialsOverwrites.getOverwrites('childType');
+
+			expect(result).toEqual({
+				parentField1: 'value1',
+				parentField2: 'value2',
+				specificField: 'childValue',
+			});
+		});
+	});
+});

packages/cli/src/credentials-overwrites.ts

@@ -60,7 +60,7 @@ export class CredentialsOverwrites {
 		return returnData;
 	}
 
-	private getOverwrites(type: string): ICredentialDataDecryptedObject | undefined {
+	getOverwrites(type: string): ICredentialDataDecryptedObject | undefined {
 		if (this.resolvedTypes.includes(type)) {
 			// Type got already resolved and can so returned directly
 			return this.overwriteData[type];