MyCrypto/spec/reducers/customTokens.spec.ts

import { customTokens } from 'reducers/customTokens';
import { Token } from 'config/data';
import * as customTokensActions from 'actions/customTokens';

describe('customTokens reducer', () => {
  const token1: Token = {
    address: 'address',
    symbol: 'OMG',
    decimal: 16
  };
  const token2: Token = {
    address: 'address',
    symbol: 'ANT',
    decimal: 16
  };

  it('should handle CUSTOM_TOKEN_ADD', () => {
    expect(
      customTokens(undefined, customTokensActions.addCustomToken(token1))
    ).toEqual([token1]);
  });

  it('should handle CUSTOM_TOKEN_REMOVE', () => {
    const state1 = customTokens(
      undefined,
      customTokensActions.addCustomToken(token1)
    );
    const state2 = customTokens(
      state1,
      customTokensActions.addCustomToken(token2)
    );

    expect(
      customTokens(state2, customTokensActions.removeCustomToken(token2.symbol))
    ).toEqual([token1]);
  });
});