test('resolve terminal encoding (environment)', async function () {
		process.env['VSCODE_CLI_ENCODING'] = 'utf16le';

		const enc = await encoding.resolveTerminalEncoding();
		assert.ok(encoding.encodingExists(enc));
		assert.equal(enc, 'utf16le');
	});

	constructor(config: IRawSearch, walker: FileWalker) {
		this.rootFolders = config.rootFolders;
		this.extraFiles = config.extraFiles;
		this.walker = walker;
		this.contentPattern = strings.createRegExp(config.contentPattern.pattern, config.contentPattern.isRegExp, config.contentPattern.isCaseSensitive, config.contentPattern.isWordMatch, true);
		this.isCanceled = false;
		this.limitReached = false;
		this.maxResults = config.maxResults;
		this.worked = 0;
		this.total = 0;
		this.fileEncoding = encodingExists(config.fileEncoding) ? config.fileEncoding : UTF8;
	}

	private getEncodingForResource(resource: uri, preferredEncoding?: string): string {
		let fileEncoding: string;

		const override = this.getEncodingOverride(resource);
		if (override) {
			fileEncoding = override; // encoding override always wins
		} else if (preferredEncoding) {
			fileEncoding = preferredEncoding; // preferred encoding comes second
		} else {
			fileEncoding = this.textResourceConfigurationService.getValue(resource, 'files.encoding'); // and last we check for settings
		}

		if (!fileEncoding || !encoding.encodingExists(fileEncoding)) {
			fileEncoding = encoding.UTF8; // the default is UTF 8
		}

		return fileEncoding;
	}

		return encoding.resolveTerminalEncoding().then(enc => {
			assert.ok(encoding.encodingExists(enc));
			assert.equal(enc, 'utf16le');
		});

		encoding.resolveTerminalEncoding().then(encoding => {
			assert.ok(encodingExists(encoding));
			assert.equal(encoding, 'utf16le');
			done();
		}, done);