import { StringRecordParser } from './string-record.parser';

describe('StringRecordParser', () => {
  const parser = new StringRecordParser();

  it('parses a JSON object of string values', () => {
    expect(parser.parse('{"a":"1","b":"two"}')).toEqual({ a: '1', b: 'two' });
  });

  it('parses an empty object', () => {
    expect(parser.parse('{}')).toEqual({});
  });

  it('accepts an already-parsed object (e.g. default value)', () => {
    expect(parser.parse({ a: 'b' })).toEqual({ a: 'b' });
  });

  it('rejects invalid JSON', () => {
    expect(() => parser.parse('not json')).toThrow();
  });

  it('rejects non-object JSON (array, primitive, null)', () => {
    expect(() => parser.parse('["a","b"]')).toThrow();
    expect(() => parser.parse('"a string"')).toThrow();
    expect(() => parser.parse('42')).toThrow();
    expect(() => parser.parse('null')).toThrow();
  });

  it('rejects objects with non-string values', () => {
    expect(() => parser.parse('{"a":1}')).toThrow();
    expect(() => parser.parse('{"a":{"nested":"x"}}')).toThrow();
  });
});