119 lines
4.7 KiB
TypeScript
119 lines
4.7 KiB
TypeScript
import { ChainId, Token, Pair, TokenAmount, WETH, Price } from '../src'
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describe('Pair', () => {
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const USDC = new Token(ChainId.MAINNET, '0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d', 18, 'USDC', 'USD Coin')
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const DAI = new Token(ChainId.MAINNET, '0x1AF3F329e8BE154074D8769D1FFa4eE058B1DBc3', 18, 'DAI', 'DAI Stablecoin')
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describe('constructor', () => {
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it('cannot be used for tokens on different chains', () => {
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expect(() => new Pair(new TokenAmount(USDC, '100'), new TokenAmount(WETH[ChainId.TESTNET], '100'))).toThrow(
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'CHAIN_IDS'
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)
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})
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})
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describe('#getAddress', () => {
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it('returns the correct address', () => {
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expect(Pair.getAddress(USDC, DAI)).toEqual('0xadBba1EF326A33FDB754f14e62A96D5278b942Bd')
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})
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})
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describe('#token0', () => {
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it('always is the token that sorts before', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '100')).token0).toEqual(DAI)
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expect(new Pair(new TokenAmount(DAI, '100'), new TokenAmount(USDC, '100')).token0).toEqual(DAI)
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})
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})
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describe('#token1', () => {
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it('always is the token that sorts after', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '100')).token1).toEqual(USDC)
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expect(new Pair(new TokenAmount(DAI, '100'), new TokenAmount(USDC, '100')).token1).toEqual(USDC)
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})
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})
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describe('#reserve0', () => {
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it('always comes from the token that sorts before', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '101')).reserve0).toEqual(
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new TokenAmount(DAI, '101')
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)
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expect(new Pair(new TokenAmount(DAI, '101'), new TokenAmount(USDC, '100')).reserve0).toEqual(
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new TokenAmount(DAI, '101')
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)
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})
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})
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describe('#reserve1', () => {
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it('always comes from the token that sorts after', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '101')).reserve1).toEqual(
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new TokenAmount(USDC, '100')
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)
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expect(new Pair(new TokenAmount(DAI, '101'), new TokenAmount(USDC, '100')).reserve1).toEqual(
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new TokenAmount(USDC, '100')
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)
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})
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})
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describe('#token0Price', () => {
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it('returns price of token0 in terms of token1', () => {
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expect(new Pair(new TokenAmount(USDC, '101'), new TokenAmount(DAI, '100')).token0Price).toEqual(
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new Price(DAI, USDC, '100', '101')
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)
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expect(new Pair(new TokenAmount(DAI, '100'), new TokenAmount(USDC, '101')).token0Price).toEqual(
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new Price(DAI, USDC, '100', '101')
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)
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})
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})
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describe('#token1Price', () => {
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it('returns price of token1 in terms of token0', () => {
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expect(new Pair(new TokenAmount(USDC, '101'), new TokenAmount(DAI, '100')).token1Price).toEqual(
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new Price(USDC, DAI, '101', '100')
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)
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expect(new Pair(new TokenAmount(DAI, '100'), new TokenAmount(USDC, '101')).token1Price).toEqual(
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new Price(USDC, DAI, '101', '100')
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)
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})
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})
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describe('#priceOf', () => {
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const pair = new Pair(new TokenAmount(USDC, '101'), new TokenAmount(DAI, '100'))
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it('returns price of token in terms of other token', () => {
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expect(pair.priceOf(DAI)).toEqual(pair.token0Price)
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expect(pair.priceOf(USDC)).toEqual(pair.token1Price)
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})
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it('throws if invalid token', () => {
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expect(() => pair.priceOf(WETH[ChainId.MAINNET])).toThrow('TOKEN')
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})
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})
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describe('#reserveOf', () => {
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it('returns reserves of the given token', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '101')).reserveOf(USDC)).toEqual(
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new TokenAmount(USDC, '100')
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)
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expect(new Pair(new TokenAmount(DAI, '101'), new TokenAmount(USDC, '100')).reserveOf(USDC)).toEqual(
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new TokenAmount(USDC, '100')
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)
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})
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it('throws if not in the pair', () => {
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expect(() =>
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new Pair(new TokenAmount(DAI, '101'), new TokenAmount(USDC, '100')).reserveOf(WETH[ChainId.MAINNET])
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).toThrow('TOKEN')
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})
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})
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describe('#chainId', () => {
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it('returns the token0 chainId', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '100')).chainId).toEqual(ChainId.MAINNET)
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expect(new Pair(new TokenAmount(DAI, '100'), new TokenAmount(USDC, '100')).chainId).toEqual(ChainId.MAINNET)
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})
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})
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describe('#involvesToken', () => {
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '100')).involvesToken(USDC)).toEqual(true)
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expect(new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '100')).involvesToken(DAI)).toEqual(true)
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expect(
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new Pair(new TokenAmount(USDC, '100'), new TokenAmount(DAI, '100')).involvesToken(WETH[ChainId.MAINNET])
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).toEqual(false)
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})
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})
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