import { describe, expect, it } from 'vitest';
import { inputTextRoom, ROW_GAP, valueSpan } from '../../src/editor/graph/portRow';

describe('the input text of a port row', () => {
  it('keeps its own limit while the output label leaves room for it', () => {
    expect(inputTextRoom(15, 108, 140)).toBe(108);
  });

  it('gives way before the output label, keeping the gap', () => {
    expect(inputTextRoom(15, 108, 100)).toBe(100 - ROW_GAP - 15);
  });

  it('keeps its full limit on a row without an output', () => {
    expect(inputTextRoom(15, 108, null)).toBe(108);
  });

  it('gets no room at all rather than a negative one', () => {
    expect(inputTextRoom(15, 108, 10)).toBe(0);
  });
});

describe('the value a run shows beside an output', () => {
  it('sits between the input text and the output label', () => {
    expect(valueSpan(60, 120)).toEqual({ left: 60 + ROW_GAP, right: 120 - ROW_GAP });
  });

  it('never starts right of where it has to end', () => {
    const span = valueSpan(110, 116);
    expect(span.left).toBeLessThanOrEqual(span.right);
  });
});