import { shouldFlushMemory } from '../memoryFlushPhase';

describe('shouldFlushMemory', () => {
  // Use upstream-aligned defaults: soft=4000, reserve=20000 means a 200k
  // window fires at 176k. Explicit numbers here keep the test independent
  // from the constants file.
  const base = {
    windowTokens: 200_000,
    reserveFloorTokens: 20_000,
    softThresholdTokens: 4_000,
  };

  it('returns false far from the window', () => {
    expect(shouldFlushMemory({ ...base, currentTokens: 100_000 })).toBe(false);
  });

  it('returns true exactly at the threshold', () => {
    // window - reserve - soft = 176_000
    expect(shouldFlushMemory({ ...base, currentTokens: 176_000 })).toBe(true);
  });

  it('returns true past the threshold', () => {
    expect(shouldFlushMemory({ ...base, currentTokens: 190_000 })).toBe(true);
  });

  it('returns false for non-finite inputs', () => {
    expect(shouldFlushMemory({ ...base, currentTokens: Number.NaN })).toBe(
      false
    );
  });

  it('returns false when window is zero', () => {
    expect(shouldFlushMemory({ currentTokens: 100, windowTokens: 0 })).toBe(
      false
    );
  });
});