test: Credential test migration part 1 (#19420)

packages/testing/playwright/composables/CredentialsComposer.ts

@@ -0,0 +1,53 @@
+import type { CreateCredentialDto } from '@n8n/api-types';
+
+import type { n8nPage } from '../pages/n8nPage';
+
+export class CredentialsComposer {
+	constructor(private readonly n8n: n8nPage) {}
+
+	/**
+	 * Create a credential through the Credentials list UI.
+	 * Expects the visible label of the credential type (e.g. 'Notion API').
+	 */
+	async createFromList(
+		credentialType: string,
+		fields: Record<string, string>,
+		options?: { name?: string; projectId?: string; closeDialog?: boolean },
+	) {
+		if (options?.projectId) {
+			await this.n8n.navigate.toCredentials(options.projectId);
+		} else {
+			await this.n8n.navigate.toCredentials();
+		}
+
+		// Open the "new credential" chooser: open add resource -> credential
+		await this.n8n.credentials.addResourceButton.click();
+		await this.n8n.credentials.actionCredentialButton.click();
+		await this.n8n.credentials.createCredentialFromCredentialPicker(credentialType, fields, {
+			name: options?.name,
+			closeDialog: options?.closeDialog,
+		});
+	}
+
+	/**
+	 * Create a credential through the NDV flow.
+	 * Type is implied by the open node's credential requirement.
+	 */
+	async createFromNdv(
+		fields: Record<string, string>,
+		options?: { name?: string; closeDialog?: boolean },
+	) {
+		await this.n8n.ndv.clickCreateNewCredential();
+		await this.n8n.canvas.credentialModal.addCredential(fields, {
+			name: options?.name,
+			closeDialog: options?.closeDialog,
+		});
+	}
+
+	/**
+	 * Create a credential directly via API. Returns created credential object.
+	 */
+	async createFromApi(payload: CreateCredentialDto & { projectId?: string }) {
+		return await this.n8n.api.credentialApi.createCredential(payload);
+	}
+}