class TokenTests extends BaseTest {
	test_findFirstTokens() {
		const tokens = [
			new MDToken('Lorem', MDTokenType.Text),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('_', MDTokenType.Underscore),
			new MDToken('ipsum', MDTokenType.Text),
			new MDToken('_', MDTokenType.Underscore),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('dolor', MDTokenType.Text),
			new MDToken('_', MDTokenType.Underscore),
			new MDToken('sit', MDTokenType.Text),
			new MDToken('_', MDTokenType.Underscore),
		];
		const pattern = [
			MDTokenType.Underscore,
		];
		const actual = MDToken.findFirstTokens(tokens, pattern);
		const expected = {
			tokens: [ tokens[2] ],
			index: 2,
		};
		this.assertEqual(expected, actual);
	}

	test_findFirstTokens_optionalWhitespace1() {
		const tokens = [
			new MDToken('Lorem', MDTokenType.Text),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('[ipsum]', MDTokenType.Label, 'ipsum'),
			new MDToken('(link.html)', MDTokenType.URL, 'link.html'),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('dolor', MDTokenType.Text),
		];
		const pattern = [
			MDTokenType.Label,
			MDTokenType.META_OptionalWhitespace,
			MDTokenType.URL,
		];
		const actual = MDToken.findFirstTokens(tokens, pattern);
		const expected = {
			tokens: [ tokens[2], tokens[3] ],
			index: 2,
		};
		this.assertEqual(expected, actual);
	}

	test_findFirstTokens_optionalWhitespace2() {
		const tokens = [
			new MDToken('Lorem', MDTokenType.Text),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('[ipsum]', MDTokenType.Label, 'ipsum'),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('(link.html)', MDTokenType.URL, 'link.html'),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('dolor', MDTokenType.Text),
		];
		const pattern = [
			MDTokenType.Label,
			MDTokenType.META_OptionalWhitespace,
			MDTokenType.URL,
		];
		const actual = MDToken.findFirstTokens(tokens, pattern);
		const expected = {
			tokens: [ tokens[2], tokens[3], tokens[4] ],
			index: 2,
		};
		this.assertEqual(expected, actual);
	}

	test_findPairedTokens() {
		const tokens = [
			new MDToken('Lorem', MDTokenType.Text),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('_', MDTokenType.Underscore),
			new MDToken('ipsum', MDTokenType.Text),
			new MDToken('_', MDTokenType.Underscore),
			new MDToken(' ', MDTokenType.Whitespace),
			new MDToken('dolor', MDTokenType.Text),
			new MDToken('_', MDTokenType.Underscore),
			new MDToken('sit', MDTokenType.Text),
			new MDToken('_', MDTokenType.Underscore),
		];
		const pattern = [
			MDTokenType.Underscore,
		];
		const actual = MDToken.findPairedTokens(tokens, pattern, pattern);
		const expected = {
			startTokens: [ tokens[2] ],
			contentTokens: [ tokens[3] ],
			endTokens: [ tokens[4] ],
			startIndex: 2,
			contentIndex: 3,
			endIndex: 4,
			totalLength: 3,
		}
		this.assertEqual(expected, actual);
	}
}