import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { get, writable } from 'svelte/store';
import type { UserState } from '../../src/lib/stores/userStore';
import { NDKEvent } from '@nostr-dev-kit/ndk';

// Mock userStore
const createMockUserStore = (signedIn: boolean = false) => {
  const store = writable<UserState>({
    pubkey: signedIn ? 'a'.repeat(64) : null,
    npub: signedIn ? 'npub1test' : null,
    profile: signedIn ? {
      name: 'Test User',
      displayName: 'Test User',
      picture: 'https://example.com/avatar.jpg',
    } : null,
    relays: { inbox: [], outbox: [] },
    loginMethod: signedIn ? 'extension' : null,
    ndkUser: null,
    signer: signedIn ? { sign: vi.fn() } as any : null,
    signedIn,
  });
  return store;
};

// Mock activeOutboxRelays
const mockActiveOutboxRelays = writable<string[]>(['wss://relay.example.com']);

// Mock NDK
const createMockNDK = () => ({
  fetchEvent: vi.fn(),
  publish: vi.fn(),
});

describe('CommentButton - Address Parsing', () => {
  it('parses valid event address correctly', () => {
    const address = '30041:abc123def456:my-article';
    const parts = address.split(':');

    expect(parts).toHaveLength(3);

    const [kindStr, pubkey, dTag] = parts;
    const kind = parseInt(kindStr);

    expect(kind).toBe(30041);
    expect(pubkey).toBe('abc123def456');
    expect(dTag).toBe('my-article');
    expect(isNaN(kind)).toBe(false);
  });

  it('handles dTag with colons correctly', () => {
    const address = '30041:abc123:article:with:colons';
    const parts = address.split(':');

    expect(parts.length).toBeGreaterThanOrEqual(3);

    const [kindStr, pubkey, ...dTagParts] = parts;
    const dTag = dTagParts.join(':');

    expect(parseInt(kindStr)).toBe(30041);
    expect(pubkey).toBe('abc123');
    expect(dTag).toBe('article:with:colons');
  });

  it('returns null for invalid address format (too few parts)', () => {
    const address = '30041:abc123';
    const parts = address.split(':');

    if (parts.length !== 3) {
      expect(parts.length).toBeLessThan(3);
    }
  });

  it('returns null for invalid address format (invalid kind)', () => {
    const address = 'invalid:abc123:dtag';
    const parts = address.split(':');
    const kind = parseInt(parts[0]);

    expect(isNaN(kind)).toBe(true);
  });

  it('parses different publication kinds correctly', () => {
    const addresses = [
      '30040:pubkey:section-id',  // Zettel section
      '30041:pubkey:article-id',   // Long-form article
      '30818:pubkey:wiki-id',      // Wiki article
      '30023:pubkey:blog-id',      // Blog post
    ];

    addresses.forEach(address => {
      const parts = address.split(':');
      const kind = parseInt(parts[0]);

      expect(isNaN(kind)).toBe(false);
      expect(kind).toBeGreaterThan(0);
    });
  });
});

describe('CommentButton - NIP-22 Event Creation', () => {
  let mockNDK: any;
  let mockUserStore: any;
  let mockActiveOutboxRelays: any;

  beforeEach(() => {
    mockNDK = createMockNDK();
    mockUserStore = createMockUserStore(true);
    mockActiveOutboxRelays = writable(['wss://relay.example.com']);
  });

  afterEach(() => {
    vi.clearAllMocks();
  });

  it('creates kind 1111 comment event', async () => {
    const address = '30041:' + 'a'.repeat(64) + ':my-article';
    const content = 'This is my comment';

    // Mock event creation
    const commentEvent = new NDKEvent(mockNDK);
    commentEvent.kind = 1111;
    commentEvent.content = content;

    expect(commentEvent.kind).toBe(1111);
    expect(commentEvent.content).toBe(content);
  });

  it('includes correct uppercase tags (A, K, P) for root', () => {
    const address = '30041:' + 'b'.repeat(64) + ':article-id';
    const authorPubkey = 'b'.repeat(64);
    const kind = 30041;
    const relayHint = 'wss://relay.example.com';

    const tags = [
      ['A', address, relayHint, authorPubkey],
      ['K', kind.toString()],
      ['P', authorPubkey, relayHint],
    ];

    // Verify uppercase root tags
    expect(tags[0][0]).toBe('A');
    expect(tags[0][1]).toBe(address);
    expect(tags[0][2]).toBe(relayHint);
    expect(tags[0][3]).toBe(authorPubkey);

    expect(tags[1][0]).toBe('K');
    expect(tags[1][1]).toBe(kind.toString());

    expect(tags[2][0]).toBe('P');
    expect(tags[2][1]).toBe(authorPubkey);
    expect(tags[2][2]).toBe(relayHint);
  });

  it('includes correct lowercase tags (a, k, p) for parent', () => {
    const address = '30041:' + 'c'.repeat(64) + ':article-id';
    const authorPubkey = 'c'.repeat(64);
    const kind = 30041;
    const relayHint = 'wss://relay.example.com';

    const tags = [
      ['a', address, relayHint],
      ['k', kind.toString()],
      ['p', authorPubkey, relayHint],
    ];

    // Verify lowercase parent tags
    expect(tags[0][0]).toBe('a');
    expect(tags[0][1]).toBe(address);
    expect(tags[0][2]).toBe(relayHint);

    expect(tags[1][0]).toBe('k');
    expect(tags[1][1]).toBe(kind.toString());

    expect(tags[2][0]).toBe('p');
    expect(tags[2][1]).toBe(authorPubkey);
    expect(tags[2][2]).toBe(relayHint);
  });

  it('includes e tag with event ID when available', () => {
    const eventId = 'd'.repeat(64);
    const relayHint = 'wss://relay.example.com';

    const eTag = ['e', eventId, relayHint];

    expect(eTag[0]).toBe('e');
    expect(eTag[1]).toBe(eventId);
    expect(eTag[2]).toBe(relayHint);
    expect(eTag[1]).toHaveLength(64);
  });

  it('creates complete NIP-22 tag structure', () => {
    const address = '30041:' + 'e'.repeat(64) + ':test-article';
    const authorPubkey = 'e'.repeat(64);
    const kind = 30041;
    const eventId = 'f'.repeat(64);
    const relayHint = 'wss://relay.example.com';

    const tags = [
      // Root scope - uppercase tags
      ['A', address, relayHint, authorPubkey],
      ['K', kind.toString()],
      ['P', authorPubkey, relayHint],

      // Parent scope - lowercase tags
      ['a', address, relayHint],
      ['k', kind.toString()],
      ['p', authorPubkey, relayHint],

      // Event ID
      ['e', eventId, relayHint],
    ];

    // Verify all tags are present
    expect(tags).toHaveLength(7);

    // Verify root tags
    expect(tags.filter(t => t[0] === 'A')).toHaveLength(1);
    expect(tags.filter(t => t[0] === 'K')).toHaveLength(1);
    expect(tags.filter(t => t[0] === 'P')).toHaveLength(1);

    // Verify parent tags
    expect(tags.filter(t => t[0] === 'a')).toHaveLength(1);
    expect(tags.filter(t => t[0] === 'k')).toHaveLength(1);
    expect(tags.filter(t => t[0] === 'p')).toHaveLength(1);

    // Verify event tag
    expect(tags.filter(t => t[0] === 'e')).toHaveLength(1);
  });

  it('uses correct relay hints from activeOutboxRelays', () => {
    const relays = get(mockActiveOutboxRelays);
    const relayHint = relays[0];

    expect(relayHint).toBe('wss://relay.example.com');
    expect(relays).toHaveLength(1);
  });

  it('handles multiple outbox relays correctly', () => {
    const multipleRelays = writable([
      'wss://relay1.example.com',
      'wss://relay2.example.com',
      'wss://relay3.example.com',
    ]);

    const relays = get(multipleRelays);
    const relayHint = relays[0];

    expect(relayHint).toBe('wss://relay1.example.com');
    expect(relays).toHaveLength(3);
  });

  it('handles empty relay list gracefully', () => {
    const emptyRelays = writable<string[]>([]);
    const relays = get(emptyRelays);
    const relayHint = relays[0] || '';

    expect(relayHint).toBe('');
  });
});

describe('CommentButton - Event Signing and Publishing', () => {
  let mockNDK: any;
  let mockSigner: any;

  beforeEach(() => {
    mockNDK = createMockNDK();
    mockSigner = {
      sign: vi.fn().mockResolvedValue(undefined),
    };
  });

  afterEach(() => {
    vi.clearAllMocks();
  });

  it('signs event with user signer', async () => {
    const commentEvent = new NDKEvent(mockNDK);
    commentEvent.kind = 1111;
    commentEvent.content = 'Test comment';

    await mockSigner.sign(commentEvent);

    expect(mockSigner.sign).toHaveBeenCalledWith(commentEvent);
    expect(mockSigner.sign).toHaveBeenCalledTimes(1);
  });

  it('publishes to outbox relays', async () => {
    const publishMock = vi.fn().mockResolvedValue(new Set(['wss://relay.example.com']));

    const commentEvent = new NDKEvent(mockNDK);
    commentEvent.publish = publishMock;

    const publishedRelays = await commentEvent.publish();

    expect(publishMock).toHaveBeenCalled();
    expect(publishedRelays.size).toBeGreaterThan(0);
  });

  it('handles publishing errors gracefully', async () => {
    const publishMock = vi.fn().mockResolvedValue(new Set());

    const commentEvent = new NDKEvent(mockNDK);
    commentEvent.publish = publishMock;

    const publishedRelays = await commentEvent.publish();

    expect(publishedRelays.size).toBe(0);
  });

  it('throws error when publishing fails', async () => {
    const publishMock = vi.fn().mockRejectedValue(new Error('Network error'));

    const commentEvent = new NDKEvent(mockNDK);
    commentEvent.publish = publishMock;

    await expect(commentEvent.publish()).rejects.toThrow('Network error');
  });
});

describe('CommentButton - User Authentication', () => {
  it('requires user to be signed in', () => {
    const signedOutStore = createMockUserStore(false);
    const user = get(signedOutStore);

    expect(user.signedIn).toBe(false);
    expect(user.signer).toBeNull();
  });

  it('shows error when user is not signed in', () => {
    const signedOutStore = createMockUserStore(false);
    const user = get(signedOutStore);

    if (!user.signedIn || !user.signer) {
      const error = 'You must be signed in to comment';
      expect(error).toBe('You must be signed in to comment');
    }
  });

  it('allows commenting when user is signed in', () => {
    const signedInStore = createMockUserStore(true);
    const user = get(signedInStore);

    expect(user.signedIn).toBe(true);
    expect(user.signer).not.toBeNull();
  });

  it('displays user profile information when signed in', () => {
    const signedInStore = createMockUserStore(true);
    const user = get(signedInStore);

    expect(user.profile).not.toBeNull();
    expect(user.profile?.displayName).toBe('Test User');
    expect(user.profile?.picture).toBe('https://example.com/avatar.jpg');
  });

  it('handles missing user profile gracefully', () => {
    const storeWithoutProfile = writable<UserState>({
      pubkey: 'a'.repeat(64),
      npub: 'npub1test',
      profile: null,
      relays: { inbox: [], outbox: [] },
      loginMethod: 'extension',
      ndkUser: null,
      signer: { sign: vi.fn() } as any,
      signedIn: true,
    });

    const user = get(storeWithoutProfile);
    const displayName = user.profile?.displayName || user.profile?.name || 'Anonymous';

    expect(displayName).toBe('Anonymous');
  });
});

describe('CommentButton - User Interactions', () => {
  it('prevents submission of empty comment', () => {
    const commentContent = '';
    const isEmpty = !commentContent.trim();

    expect(isEmpty).toBe(true);
  });

  it('allows submission of non-empty comment', () => {
    const commentContent = 'This is a valid comment';
    const isEmpty = !commentContent.trim();

    expect(isEmpty).toBe(false);
  });

  it('handles whitespace-only comments as empty', () => {
    const commentContent = '   \n\t  ';
    const isEmpty = !commentContent.trim();

    expect(isEmpty).toBe(true);
  });

  it('clears input after successful comment', () => {
    let commentContent = 'This is my comment';

    // Simulate successful submission
    commentContent = '';

    expect(commentContent).toBe('');
  });

  it('closes comment UI after successful posting', () => {
    let showCommentUI = true;

    // Simulate successful post with delay
    setTimeout(() => {
      showCommentUI = false;
    }, 0);

    // Initially still open
    expect(showCommentUI).toBe(true);
  });

  it('calls onCommentPosted callback when provided', () => {
    const onCommentPosted = vi.fn();

    // Simulate successful comment post
    onCommentPosted();

    expect(onCommentPosted).toHaveBeenCalled();
  });

  it('does not error when onCommentPosted is not provided', () => {
    const onCommentPosted = undefined;

    expect(() => {
      if (onCommentPosted) {
        onCommentPosted();
      }
    }).not.toThrow();
  });
});

describe('CommentButton - UI State Management', () => {
  it('button is hidden by default', () => {
    const sectionHovered = false;
    const showCommentUI = false;
    const visible = sectionHovered || showCommentUI;

    expect(visible).toBe(false);
  });

  it('button appears on section hover', () => {
    const sectionHovered = true;
    const showCommentUI = false;
    const visible = sectionHovered || showCommentUI;

    expect(visible).toBe(true);
  });

  it('button remains visible when comment UI is shown', () => {
    const sectionHovered = false;
    const showCommentUI = true;
    const visible = sectionHovered || showCommentUI;

    expect(visible).toBe(true);
  });

  it('toggles comment UI when button is clicked', () => {
    let showCommentUI = false;

    // Simulate button click
    showCommentUI = !showCommentUI;
    expect(showCommentUI).toBe(true);

    // Click again
    showCommentUI = !showCommentUI;
    expect(showCommentUI).toBe(false);
  });

  it('resets error state when toggling UI', () => {
    let error: string | null = 'Previous error';
    let success = true;

    // Simulate UI toggle
    error = null;
    success = false;

    expect(error).toBeNull();
    expect(success).toBe(false);
  });

  it('shows error message when present', () => {
    const error = 'Failed to post comment';

    expect(error).toBeDefined();
    expect(error.length).toBeGreaterThan(0);
  });

  it('shows success message after posting', () => {
    const success = true;
    const successMessage = 'Comment posted successfully!';

    if (success) {
      expect(successMessage).toBe('Comment posted successfully!');
    }
  });

  it('disables submit button when submitting', () => {
    const isSubmitting = true;
    const disabled = isSubmitting;

    expect(disabled).toBe(true);
  });

  it('disables submit button when comment is empty', () => {
    const commentContent = '';
    const isSubmitting = false;
    const disabled = isSubmitting || !commentContent.trim();

    expect(disabled).toBe(true);
  });

  it('enables submit button when comment is valid', () => {
    const commentContent = 'Valid comment';
    const isSubmitting = false;
    const disabled = isSubmitting || !commentContent.trim();

    expect(disabled).toBe(false);
  });
});

describe('CommentButton - Edge Cases', () => {
  it('handles invalid address format gracefully', () => {
    const invalidAddresses = [
      '',
      'invalid',
      '30041:',
      ':pubkey:dtag',
      '30041:pubkey',
      'not-a-number:pubkey:dtag',
    ];

    invalidAddresses.forEach(address => {
      const parts = address.split(':');
      const isValid = parts.length === 3 && !isNaN(parseInt(parts[0]));

      expect(isValid).toBe(false);
    });
  });

  it('handles network errors during event fetch', async () => {
    const mockNDK = {
      fetchEvent: vi.fn().mockRejectedValue(new Error('Network error')),
    };

    let eventId = '';
    try {
      await mockNDK.fetchEvent({});
    } catch (err) {
      // Handle gracefully, continue without event ID
      eventId = '';
    }

    expect(eventId).toBe('');
  });

  it('handles missing relay information', () => {
    const emptyRelays: string[] = [];
    const relayHint = emptyRelays[0] || '';

    expect(relayHint).toBe('');
  });

  it('handles very long comment text without truncation', () => {
    const longComment = 'a'.repeat(10000);
    const content = longComment;

    expect(content.length).toBe(10000);
    expect(content).toBe(longComment);
  });

  it('handles special characters in comments', () => {
    const specialComments = [
      'Comment with "quotes"',
      'Comment with emoji 😊',
      'Comment with\nnewlines',
      'Comment with\ttabs',
      'Comment with <html> tags',
      'Comment with & ampersands',
    ];

    specialComments.forEach(comment => {
      expect(comment.length).toBeGreaterThan(0);
      expect(typeof comment).toBe('string');
    });
  });

  it('handles event creation failure', async () => {
    const address = 'invalid:address';
    const parts = address.split(':');

    if (parts.length !== 3) {
      const error = 'Invalid event address';
      expect(error).toBe('Invalid event address');
    }
  });

  it('handles signing errors', async () => {
    const mockSigner = {
      sign: vi.fn().mockRejectedValue(new Error('Signing failed')),
    };

    const event = { kind: 1111, content: 'test' };

    await expect(mockSigner.sign(event)).rejects.toThrow('Signing failed');
  });

  it('handles publish failure when no relays accept event', async () => {
    const publishMock = vi.fn().mockResolvedValue(new Set());

    const relaySet = await publishMock();

    if (relaySet.size === 0) {
      const error = 'Failed to publish to any relays';
      expect(error).toBe('Failed to publish to any relays');
    }
  });
});

describe('CommentButton - Cancel Functionality', () => {
  it('clears comment content when canceling', () => {
    let commentContent = 'This comment will be canceled';

    // Simulate cancel
    commentContent = '';

    expect(commentContent).toBe('');
  });

  it('closes comment UI when canceling', () => {
    let showCommentUI = true;

    // Simulate cancel
    showCommentUI = false;

    expect(showCommentUI).toBe(false);
  });

  it('clears error state when canceling', () => {
    let error: string | null = 'Some error';

    // Simulate cancel
    error = null;

    expect(error).toBeNull();
  });

  it('clears success state when canceling', () => {
    let success = true;

    // Simulate cancel
    success = false;

    expect(success).toBe(false);
  });
});

describe('CommentButton - Event Fetching', () => {
  let mockNDK: any;

  beforeEach(() => {
    mockNDK = createMockNDK();
  });

  afterEach(() => {
    vi.clearAllMocks();
  });

  it('fetches target event to get event ID', async () => {
    const address = '30041:' + 'a'.repeat(64) + ':article';
    const parts = address.split(':');
    const [kindStr, authorPubkey, dTag] = parts;
    const kind = parseInt(kindStr);

    const mockEvent = {
      id: 'b'.repeat(64),
      kind,
      pubkey: authorPubkey,
      tags: [['d', dTag]],
    };

    mockNDK.fetchEvent.mockResolvedValue(mockEvent);

    const targetEvent = await mockNDK.fetchEvent({
      kinds: [kind],
      authors: [authorPubkey],
      '#d': [dTag],
    });

    expect(mockNDK.fetchEvent).toHaveBeenCalled();
    expect(targetEvent?.id).toBe('b'.repeat(64));
  });

  it('continues without event ID when fetch fails', async () => {
    mockNDK.fetchEvent.mockRejectedValue(new Error('Fetch failed'));

    let eventId = '';
    try {
      const targetEvent = await mockNDK.fetchEvent({});
      if (targetEvent) {
        eventId = targetEvent.id;
      }
    } catch (err) {
      // Continue without event ID
      eventId = '';
    }

    expect(eventId).toBe('');
  });

  it('handles null event from fetch', async () => {
    mockNDK.fetchEvent.mockResolvedValue(null);

    const targetEvent = await mockNDK.fetchEvent({});
    let eventId = '';

    if (targetEvent) {
      eventId = targetEvent.id;
    }

    expect(eventId).toBe('');
  });
});

describe('CommentButton - CSS Classes and Styling', () => {
  it('applies visible class when section is hovered', () => {
    const sectionHovered = true;
    const showCommentUI = false;
    const hasVisibleClass = sectionHovered || showCommentUI;

    expect(hasVisibleClass).toBe(true);
  });

  it('removes visible class when not hovered and UI closed', () => {
    const sectionHovered = false;
    const showCommentUI = false;
    const hasVisibleClass = sectionHovered || showCommentUI;

    expect(hasVisibleClass).toBe(false);
  });

  it('button has correct aria-label', () => {
    const ariaLabel = 'Add comment';

    expect(ariaLabel).toBe('Add comment');
  });

  it('button has correct title attribute', () => {
    const title = 'Add comment';

    expect(title).toBe('Add comment');
  });

  it('submit button shows loading state when submitting', () => {
    const isSubmitting = true;
    const buttonText = isSubmitting ? 'Posting...' : 'Post Comment';

    expect(buttonText).toBe('Posting...');
  });

  it('submit button shows normal state when not submitting', () => {
    const isSubmitting = false;
    const buttonText = isSubmitting ? 'Posting...' : 'Post Comment';

    expect(buttonText).toBe('Post Comment');
  });
});

describe('CommentButton - NIP-22 Compliance', () => {
  it('uses kind 1111 for comment events', () => {
    const kind = 1111;

    expect(kind).toBe(1111);
  });

  it('includes all required NIP-22 tags for addressable events', () => {
    const requiredRootTags = ['A', 'K', 'P'];
    const requiredParentTags = ['a', 'k', 'p'];

    const tags = [
      ['A', 'address', 'relay', 'pubkey'],
      ['K', 'kind'],
      ['P', 'pubkey', 'relay'],
      ['a', 'address', 'relay'],
      ['k', 'kind'],
      ['p', 'pubkey', 'relay'],
    ];

    requiredRootTags.forEach(tag => {
      expect(tags.some(t => t[0] === tag)).toBe(true);
    });

    requiredParentTags.forEach(tag => {
      expect(tags.some(t => t[0] === tag)).toBe(true);
    });
  });

  it('A tag includes relay hint and author pubkey', () => {
    const aTag = ['A', '30041:pubkey:dtag', 'wss://relay.com', 'pubkey'];

    expect(aTag).toHaveLength(4);
    expect(aTag[0]).toBe('A');
    expect(aTag[2]).toMatch(/^wss:\/\//);
    expect(aTag[3]).toBeTruthy();
  });

  it('P tag includes relay hint', () => {
    const pTag = ['P', 'pubkey', 'wss://relay.com'];

    expect(pTag).toHaveLength(3);
    expect(pTag[0]).toBe('P');
    expect(pTag[2]).toMatch(/^wss:\/\//);
  });

  it('lowercase tags for parent scope match root tags', () => {
    const address = '30041:pubkey:dtag';
    const kind = '30041';
    const pubkey = 'pubkey';
    const relay = 'wss://relay.com';

    const rootTags = [
      ['A', address, relay, pubkey],
      ['K', kind],
      ['P', pubkey, relay],
    ];

    const parentTags = [
      ['a', address, relay],
      ['k', kind],
      ['p', pubkey, relay],
    ];

    // Verify parent tags match root tags (lowercase)
    expect(parentTags[0][1]).toBe(rootTags[0][1]); // address
    expect(parentTags[1][1]).toBe(rootTags[1][1]); // kind
    expect(parentTags[2][1]).toBe(rootTags[2][1]); // pubkey
  });
});

describe('CommentButton - Integration Scenarios', () => {
  it('complete comment flow for signed-in user', () => {
    const userStore = createMockUserStore(true);
    const user = get(userStore);

    // User is signed in
    expect(user.signedIn).toBe(true);

    // Comment content is valid
    const content = 'Great article!';
    expect(content.trim().length).toBeGreaterThan(0);

    // Address is valid
    const address = '30041:' + 'a'.repeat(64) + ':article';
    const parts = address.split(':');
    expect(parts.length).toBe(3);

    // Event would be created with kind 1111
    const kind = 1111;
    expect(kind).toBe(1111);
  });

  it('prevents comment flow for signed-out user', () => {
    const userStore = createMockUserStore(false);
    const user = get(userStore);

    expect(user.signedIn).toBe(false);

    if (!user.signedIn) {
      const error = 'You must be signed in to comment';
      expect(error).toBeTruthy();
    }
  });

  it('handles comment with event ID lookup', async () => {
    const mockNDK = createMockNDK();
    const eventId = 'c'.repeat(64);

    mockNDK.fetchEvent.mockResolvedValue({ id: eventId });

    const targetEvent = await mockNDK.fetchEvent({});

    const tags = [
      ['e', targetEvent.id, 'wss://relay.com'],
    ];

    expect(tags[0][1]).toBe(eventId);
  });

  it('handles comment without event ID lookup', () => {
    const eventId = '';

    const tags = [
      ['A', 'address', 'relay', 'pubkey'],
      ['K', 'kind'],
      ['P', 'pubkey', 'relay'],
      ['a', 'address', 'relay'],
      ['k', 'kind'],
      ['p', 'pubkey', 'relay'],
    ];

    // No e tag should be included
    expect(tags.filter(t => t[0] === 'e')).toHaveLength(0);

    // But all other required tags should be present
    expect(tags.length).toBe(6);
  });
});