utils.test.js

/* eslint-env jest */

const {utils} = require('./lib/nostr.cjs')

const {insertEventIntoAscendingList, insertEventIntoDescendingList} = utils

describe('inserting into a desc sorted list of events', () => {
  test('insert into an empty list', async () => {
    const list0 = []
    expect(
      insertEventIntoDescendingList(list0, {id: 'abc', created_at: 10})
    ).toHaveLength(1)
  })

  test('insert in the beginning of a list', async () => {
    const list0 = [{created_at: 20}, {created_at: 10}]
    const list1 = insertEventIntoDescendingList(list0, {
      id: 'abc',
      created_at: 30
    })
    expect(list1).toHaveLength(3)
    expect(list1[0].id).toBe('abc')
  })

  test('insert in the beginning of a list with same created_at', async () => {
    const list0 = [{created_at: 30}, {created_at: 20}, {created_at: 10}]
    const list1 = insertEventIntoDescendingList(list0, {
      id: 'abc',
      created_at: 30
    })
    expect(list1).toHaveLength(4)
    expect(list1[0].id).toBe('abc')
  })

  test('insert in the middle of a list', async () => {
    const list0 = [
      {created_at: 30},
      {created_at: 20},
      {created_at: 10},
      {created_at: 1}
    ]
    const list1 = insertEventIntoDescendingList(list0, {
      id: 'abc',
      created_at: 15
    })
    expect(list1).toHaveLength(5)
    expect(list1[2].id).toBe('abc')
  })

  test('insert in the end of a list', async () => {
    const list0 = [
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 10}
    ]
    const list1 = insertEventIntoDescendingList(list0, {
      id: 'abc',
      created_at: 5
    })
    expect(list1).toHaveLength(6)
    expect(list1.slice(-1)[0].id).toBe('abc')
  })

  test('insert in the last-to-end of a list with same created_at', async () => {
    const list0 = [
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 10}
    ]
    const list1 = insertEventIntoDescendingList(list0, {
      id: 'abc',
      created_at: 10
    })
    expect(list1).toHaveLength(6)
    expect(list1.slice(-2)[0].id).toBe('abc')
  })

  test('do not insert duplicates', async () => {
    const list0 = [
      {created_at: 20},
      {created_at: 20},
      {created_at: 10, id: 'abc'}
    ]
    const list1 = insertEventIntoDescendingList(list0, {
      id: 'abc',
      created_at: 10
    })
    expect(list1).toHaveLength(3)
  })
})

describe('inserting into a asc sorted list of events', () => {
  test('insert into an empty list', async () => {
    const list0 = []
    expect(
      insertEventIntoAscendingList(list0, {id: 'abc', created_at: 10})
    ).toHaveLength(1)
  })

  test('insert in the beginning of a list', async () => {
    const list0 = [{created_at: 10}, {created_at: 20}]
    const list1 = insertEventIntoAscendingList(list0, {
      id: 'abc',
      created_at: 1
    })
    expect(list1).toHaveLength(3)
    expect(list1[0].id).toBe('abc')
  })

  test('insert in the beginning of a list with same created_at', async () => {
    const list0 = [{created_at: 10}, {created_at: 20}, {created_at: 30}]
    const list1 = insertEventIntoAscendingList(list0, {
      id: 'abc',
      created_at: 10
    })
    expect(list1).toHaveLength(4)
    expect(list1[0].id).toBe('abc')
  })

  test('insert in the middle of a list', async () => {
    const list0 = [
      {created_at: 10},
      {created_at: 20},
      {created_at: 30},
      {created_at: 40}
    ]
    const list1 = insertEventIntoAscendingList(list0, {
      id: 'abc',
      created_at: 25
    })
    expect(list1).toHaveLength(5)
    expect(list1[2].id).toBe('abc')
  })

  test('insert in the end of a list', async () => {
    const list0 = [
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 40}
    ]
    const list1 = insertEventIntoAscendingList(list0, {
      id: 'abc',
      created_at: 50
    })
    expect(list1).toHaveLength(6)
    expect(list1.slice(-1)[0].id).toBe('abc')
  })

  test('insert in the last-to-end of a list with same created_at', async () => {
    const list0 = [
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 20},
      {created_at: 30}
    ]
    const list1 = insertEventIntoAscendingList(list0, {
      id: 'abc',
      created_at: 30
    })
    expect(list1).toHaveLength(6)
    expect(list1.slice(-2)[0].id).toBe('abc')
  })

  test('do not insert duplicates', async () => {
    const list0 = [
      {created_at: 20},
      {created_at: 20},
      {created_at: 30, id: 'abc'}
    ]
    const list1 = insertEventIntoAscendingList(list0, {
      id: 'abc',
      created_at: 30
    })
    expect(list1).toHaveLength(3)
  })
})