import {
  describe,
  expect,
  it
} from 'vitest';
import {
  exceedsHighMemoryThreshold,
  formatWorkingSetGb,
  HIGH_MEMORY_THRESHOLD_KB
} from './high-memory-alert.rules';

describe('high-memory-alert.rules', () => {
  it('uses a 2 GiB working-set threshold', () => {
    expect(HIGH_MEMORY_THRESHOLD_KB).toBe(2 * 1024 * 1024);
  });

  it('detects totals at or above the threshold', () => {
    expect(exceedsHighMemoryThreshold(HIGH_MEMORY_THRESHOLD_KB - 1)).toBe(false);
    expect(exceedsHighMemoryThreshold(HIGH_MEMORY_THRESHOLD_KB)).toBe(true);
    expect(exceedsHighMemoryThreshold(HIGH_MEMORY_THRESHOLD_KB + 1024)).toBe(true);
  });

  it('formats working set totals in gigabytes', () => {
    expect(formatWorkingSetGb(1536 * 1024)).toBe('1.50');
    expect(formatWorkingSetGb(HIGH_MEMORY_THRESHOLD_KB)).toBe('2.00');
  });
});