Normalize generation error notice messages

src/experiments/excerpt-generation/components/useExcerptGeneration.ts

@@ -8,6 +8,7 @@
 import { dispatch, useDispatch, useSelect } from '@wordpress/data';
 import { store as editorStore } from '@wordpress/editor';
 import { useState } from '@wordpress/element';
+import { __ } from '@wordpress/i18n';
 import { store as noticesStore } from '@wordpress/notices';
 
 /**
@@ -115,7 +116,12 @@ export function useExcerptGeneration(): {
 				excerptInput.dispatchEvent( changeEvent );
 			}
 		} catch ( error: any ) {
-			( dispatch( noticesStore ) as any ).createErrorNotice( error, {
+			const message =
+				typeof error === 'string'
+					? error
+					: error?.message ??
+					  __( 'Failed to generate excerpt.', 'ai' );
+			( dispatch( noticesStore ) as any ).createErrorNotice( message, {
 				id: NOTICE_ID,
 				isDismissible: true,
 			} );

src/experiments/summarization/functions/useSummaryGeneration.ts

@@ -10,6 +10,7 @@ import { store as blockEditorStore } from '@wordpress/block-editor';
 import { dispatch, useDispatch, useSelect } from '@wordpress/data';
 import { store as editorStore } from '@wordpress/editor';
 import { useEffect, useState } from '@wordpress/element';
+import { __ } from '@wordpress/i18n';
 import { store as noticesStore } from '@wordpress/notices';
 
 /**
@@ -114,7 +115,12 @@ export function useSummaryGeneration() {
 				);
 			}
 		} catch ( error: any ) {
-			( dispatch( noticesStore ) as any ).createErrorNotice( error, {
+			const message =
+				typeof error === 'string'
+					? error
+					: error?.message ??
+					  __( 'Failed to generate summary.', 'ai' );
+			( dispatch( noticesStore ) as any ).createErrorNotice( message, {
 				id: NOTICE_ID,
 				isDismissible: true,
 			} );

tests/e2e/specs/experiments/content-summarization.spec.js

@@ -11,6 +11,7 @@ const {
 	disableExperiments,
 	enableExperiment,
 	enableExperiments,
+	seedCredentials,
 } = require( '../../utils/helpers' );
 
 test.describe( 'Content Summarization Experiment', () => {
@@ -90,6 +91,61 @@ test.describe( 'Content Summarization Experiment', () => {
 		await editor.saveDraft();
 	} );
 
+	test( 'Shows a clean error notice when summary generation fails', async ( {
+		admin,
+		editor,
+		page,
+		requestUtils,
+	} ) => {
+		await seedCredentials( requestUtils );
+
+		// Globally turn on Experiments.
+		await enableExperiments( admin, page );
+
+		// Enable the Content Summarization Experiment.
+		await enableExperiment( admin, page, 'Content Summarization' );
+
+		await admin.createNewPost( {
+			postType: 'post',
+			title: 'Test Content Summarization Error Notice',
+			content:
+				'This post has enough content to meet the minimum character requirement for summarization and trigger the failing AI provider path.',
+		} );
+
+		// Save the post.
+		await editor.saveDraft();
+
+		// Ensure the sidebar is visible.
+		await editor.openDocumentSettingsSidebar();
+
+		// Make the browser-side ability client fail so the notice path is exercised.
+		await page.evaluate( () => {
+			window.wp = window.wp || {};
+			window.wp.abilities = window.wp.abilities || {};
+			window.wp.abilities.executeAbility = async function () {
+				throw new Error(
+					'Summarization failed. Please ensure you have a connected provider that supports text generation.'
+				);
+			};
+		} );
+
+		const generateButton = page.locator(
+			'.ai-summarization-plugin-container button'
+		);
+		await expect( generateButton ).toBeVisible();
+		await expect( generateButton ).toBeEnabled();
+		await generateButton.click();
+
+		const notice = page.locator( '.components-notice', {
+			hasText:
+				'Summarization failed. Please ensure you have a connected provider that supports text generation.',
+		} );
+		await expect( notice ).toBeVisible( { timeout: 5000 } );
+		await expect( notice ).not.toContainText(
+			'Error: Summarization failed. Please ensure you have a connected provider that supports text generation.'
+		);
+	} );
+
 	test( 'Ensure the Content Summarization Experiment UI is not visible when Experiments are globally disabled', async ( {
 		admin,
 		editor,

tests/e2e/specs/experiments/excerpt-generation.spec.js

@@ -11,6 +11,7 @@ const {
 	disableExperiments,
 	enableExperiment,
 	enableExperiments,
+	seedCredentials,
 } = require( '../../utils/helpers' );
 
 test.describe( 'Excerpt Generation Experiment', () => {
@@ -126,6 +127,44 @@ test.describe( 'Excerpt Generation Experiment', () => {
 		await editor.saveDraft();
 	} );
 
+	test( 'Shows a clean error notice when excerpt generation fails', async ( {
+		admin,
+		editor,
+		page,
+		requestUtils,
+	} ) => {
+		await seedCredentials( requestUtils );
+
+		// Globally turn on Experiments.
+		await enableExperiments( admin, page );
+
+		// Enable the Excerpt Generation Experiment.
+		await enableExperiment( admin, page, 'Excerpt Generation' );
+
+		// Create a new post without content so excerpt generation returns an error.
+		await admin.createNewPost( {
+			postType: 'post',
+			title: 'Test Excerpt Generation Error Notice',
+		} );
+
+		// Ensure the sidebar is visible.
+		await editor.openDocumentSettingsSidebar();
+
+		const inlineButton = page.locator(
+			'.editor-post-excerpt__dropdown .ai-excerpt-inline-wrapper .ai-excerpt-inline-button'
+		);
+		await expect( inlineButton ).toBeVisible( { timeout: 5000 } );
+		await inlineButton.click();
+
+		const notice = page.locator( '.components-notice', {
+			hasText: 'Content is required to generate an excerpt suggestion.',
+		} );
+		await expect( notice ).toBeVisible( { timeout: 5000 } );
+		await expect( notice ).not.toContainText(
+			'Error: Content is required to generate an excerpt suggestion.'
+		);
+	} );
+
 	test( 'Ensure the Excerpt Generation Experiment UI is not visible when Experiments are globally disabled', async ( {
 		admin,
 		editor,