open-brainy/tests/unit/brainy/find-complement-operators.test.ts

/**
 * @module tests/unit/brainy/find-complement-operators
 * @description The negation/absence where-operators (`ne`, `exists:false`,
 * `missing:true`) are served as a roaring-bitmap difference over the int-id
 * universe (rather than materializing the whole corpus as UUID strings to
 * filter). These tests pin the exact result set — including the load-bearing
 * soft-delete semantic: `field !== value` MUST include entities that have no
 * such field at all.
 */
import { describe, it, expect, beforeEach, afterEach } from 'vitest'
import { Brainy } from '../../../src/brainy'
import { NounType } from '../../../src/types/graphTypes'

describe('find() complement operators (ne / exists:false / missing:true)', () => {
  let brain: Brainy<any>
  // Three entities WITH a `status` field, two WITHOUT it.
  const ids: Record<string, string> = {}

  beforeEach(async () => {
    brain = new Brainy({ requireSubtype: false, storage: { type: 'memory' } })
    await brain.init()
    ids.active1 = await brain.add({ data: 'a1', type: NounType.Thing, metadata: { status: 'active' } })
    ids.active2 = await brain.add({ data: 'a2', type: NounType.Thing, metadata: { status: 'active' } })
    ids.closed = await brain.add({ data: 'c', type: NounType.Thing, metadata: { status: 'closed' } })
    ids.noField1 = await brain.add({ data: 'n1', type: NounType.Thing, metadata: { other: 1 } })
    ids.noField2 = await brain.add({ data: 'n2', type: NounType.Thing, metadata: { other: 2 } })
  })

  afterEach(async () => {
    await brain.close()
  })

  it('ne returns everything except the matching value — INCLUDING entities without the field', async () => {
    const rows = await brain.find({ where: { status: { ne: 'active' } }, limit: 100 })
    const got = new Set(rows.map((r) => r.id))
    // closed (status≠active) + the two without a status field at all.
    expect(got).toEqual(new Set([ids.closed, ids.noField1, ids.noField2]))
    expect(got.has(ids.active1)).toBe(false)
    expect(got.has(ids.active2)).toBe(false)
  })

  it('exists:false returns exactly the entities without the field', async () => {
    const rows = await brain.find({ where: { status: { exists: false } }, limit: 100 })
    expect(new Set(rows.map((r) => r.id))).toEqual(new Set([ids.noField1, ids.noField2]))
  })

  it('missing:true matches exists:false (entities without the field)', async () => {
    const rows = await brain.find({ where: { status: { missing: true } }, limit: 100 })
    expect(new Set(rows.map((r) => r.id))).toEqual(new Set([ids.noField1, ids.noField2]))
  })

  it('exists:true returns exactly the entities with the field', async () => {
    const rows = await brain.find({ where: { status: { exists: true } }, limit: 100 })
    expect(new Set(rows.map((r) => r.id))).toEqual(new Set([ids.active1, ids.active2, ids.closed]))
  })

  it('the complement reflects deletes (a removed entity drops out of ne / exists:false)', async () => {
    await brain.remove(ids.noField1)
    const ne = await brain.find({ where: { status: { ne: 'active' } }, limit: 100 })
    expect(new Set(ne.map((r) => r.id))).toEqual(new Set([ids.closed, ids.noField2]))
    const absent = await brain.find({ where: { status: { exists: false } }, limit: 100 })
    expect(new Set(absent.map((r) => r.id))).toEqual(new Set([ids.noField2]))
  })
})