import { Matcher } from 'ts-mockito/lib/matcher/type/Matcher';

export function matchBuffer(channel: number, contents: string): Matcher {

return new StringBufferMatcher(channel, contents);

}

class StringBufferMatcher extends Matcher {

constructor(private channel: number, private contents: string) {

super();

}

public match(value: any): boolean {

if (value instanceof Buffer) {

const buffer = value as Buffer;

const channel: number = buffer.readInt8(0);

const contents: string = buffer.toString('utf8', 1);

return this.channel === channel && this.contents === contents;

}

return false;

}

public toString(): string {

return `buffer did not contain "${this.contents}"`;

}

}