sentry/tests/js/spec/components/arithmeticInput/parser.spec.tsx

import {Operation, parseArithmetic} from 'sentry/components/arithmeticInput/parser';

describe('arithmeticInput/parser', function () {
  it('errors on too many operators', () => {
    expect(parseArithmetic('1+1+1+1+1+1+1+1+1+1+1+1').error).toEqual(
      'Maximum operators exceeded'
    );
  });

  it('errors on divide by 0', () => {
    expect(parseArithmetic('1/0').error).toEqual('Division by 0 is not allowed');
  });

  it('handles one term', () => {
    expect(parseArithmetic('1').result).toStrictEqual('1');
  });

  it('handles some addition', () => {
    expect(parseArithmetic('1 + 2').result).toStrictEqual(
      new Operation({
        operator: 'plus',
        lhs: '1',
        rhs: '2',
      })
    );
  });

  it('handles three term addition', () => {
    expect(parseArithmetic('1 + 2 + 3').result).toStrictEqual(
      new Operation({
        operator: 'plus',
        lhs: new Operation({
          operator: 'plus',
          lhs: '1',
          rhs: '2',
        }),
        rhs: '3',
      })
    );
  });

  it('handles some multiplication', () => {
    expect(parseArithmetic('1 * 2').result).toStrictEqual(
      new Operation({
        operator: 'multiply',
        lhs: '1',
        rhs: '2',
      })
    );
  });

  it('handles three term multiplication', () => {
    expect(parseArithmetic('1 * 2 * 3').result).toStrictEqual(
      new Operation({
        operator: 'multiply',
        lhs: new Operation({
          operator: 'multiply',
          lhs: '1',
          rhs: '2',
        }),
        rhs: '3',
      })
    );
  });

  it('handles brackets', () => {
    expect(parseArithmetic('1 * (2 + 3)').result).toStrictEqual(
      new Operation({
        operator: 'multiply',
        lhs: '1',
        rhs: new Operation({
          operator: 'plus',
          lhs: '2',
          rhs: '3',
        }),
      })
    );

    expect(parseArithmetic('(1 + 2) / 3').result).toStrictEqual(
      new Operation({
        operator: 'divide',
        lhs: new Operation({
          operator: 'plus',
          lhs: '1',
          rhs: '2',
        }),
        rhs: '3',
      })
    );
  });

  it('handles order of operations', () => {
    expect(parseArithmetic('1 + 2 * 3').result).toStrictEqual(
      new Operation({
        operator: 'plus',
        lhs: '1',
        rhs: new Operation({
          operator: 'multiply',
          lhs: '2',
          rhs: '3',
        }),
      })
    );

    expect(parseArithmetic('1 / 2 - 3').result).toStrictEqual(
      new Operation({
        operator: 'minus',
        lhs: new Operation({
          operator: 'divide',
          lhs: '1',
          rhs: '2',
        }),
        rhs: '3',
      })
    );
  });

  it('handles fields and functions', () => {
    expect(parseArithmetic('spans.db + measurements.lcp').result).toStrictEqual(
      new Operation({
        operator: 'plus',
        lhs: 'spans.db',
        rhs: 'measurements.lcp',
      })
    );

    expect(parseArithmetic('failure_count() + count_unique(user)').result).toStrictEqual(
      new Operation({
        operator: 'plus',
        lhs: 'failure_count()',
        rhs: 'count_unique(user)',
      })
    );
  });
});