Spaces:
Running
on
CPU Upgrade
programmer assistant
๐: Hello
๐ค: Hello! I'm here to assist you in any way I can. Please feel free to ask me any questions, and I'll do my best to provide you with helpful and accurate information. If a question doesn't make sense or is not factually coherent, I'll do my best to explain why and provide alternative ways to approach the question. If I don't know the answer to a question, I'll be honest and let you know instead of providing false information.
Is there anything specific you'd like to know or discuss? I'm here to help with any questions you might have..
๐: export const load = async () => {
const res1 = await fetch(
"https://www.dextools.io/shared/data/swaps?chain=arbitrum&pair=0xe2ddd33585b441b9245085588169f35108f85a6e&filter=true"
);
const data_1 = await res1.json();
const nextTimestamp = Number(data_1.data.next);
const res2 = await fetch(
https://www.dextools.io/shared/data/swaps?chain=arbitrum&pair=0xe2ddd33585b441b9245085588169f35108f85a6e&ts=${nextTimestamp}&filter=true
);
const data_2 = await res2.json();
const mergedSwaps = data_1.data.swaps.concat(data_2.data.swaps);
return {
swaps: mergedSwaps,
};
};
how to make this code better
๐ค: There are several ways to improve the code. Here are some suggestions:
- Use async/await instead of callbacks: The code uses callbacks to handle the responses from the fetch API. Instead, you can use async/await to make the code look more synchronous and easier to read.
- Use type annotations: The code doesn't have type annotations for the variables, which can make it harder to understand the data types being used. Adding type annotations can help catch type-related errors at compile-time and make the code more readable.
- Use destructuring: The code uses
await res1.json()
andawait res2.json()
to extract the JSON data from the responses. Instead, you can use destructuring to extract the data in a more concise way. - Use
Promise.all()
: Instead of fetching the data in two separate fetch calls, you can usePromise.all()
to fetch both datasets simultaneously and then concatenate them. - Use a constant for the URL: Instead of hardcoding the URL in two places, you can define a constant for it and use it wherever necessary.
- Use a template literal for the URL: Instead
๐: give me the code for test
๐ค: Sure, here's an example of how you can test theload
function using Jest:
import { load } from './load';
describe('load', () => {
it('returns a promise that resolves to an object with a swaps property', async () => {
const result = await load();
expect(result).toHaveProperty('swaps');
});
it('fetches data from dextools.io', async () => {
const fetchMock = jest.fn();
const result = await load(fetchMock);
expect(fetchMock).toHaveBeenCalledTimes(2);
});
it('concatenates data from multiple fetch calls', async () => {
const fetchMock = jest.fn();
const result = await load(fetchMock);
expect(result.swaps).toHaveLength(2);
});
it('handles errors', async () => {
const fetchMock = jest.fn();
fetchMock.mockImplementationOnce(() => {
throw new Error('Network error');
});