515fceeb
 “wangming”
框架初始化
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import type { AxiosRequestConfig } from 'axios';
import { beforeEach, describe, expect, it, vi } from 'vitest';
import { FileDownloader } from './downloader';
describe('fileDownloader', () => {
let fileDownloader: FileDownloader;
const mockAxiosInstance = {
get: vi.fn(),
} as any;
beforeEach(() => {
fileDownloader = new FileDownloader(mockAxiosInstance);
});
it('should create an instance of FileDownloader', () => {
expect(fileDownloader).toBeInstanceOf(FileDownloader);
});
it('should download a file and return a Blob', async () => {
const url = 'https://example.com/file';
const mockBlob = new Blob(['file content'], { type: 'text/plain' });
const mockResponse: Blob = mockBlob;
mockAxiosInstance.get.mockResolvedValueOnce(mockResponse);
const result = await fileDownloader.download(url);
expect(result).toBeInstanceOf(Blob);
expect(result).toEqual(mockBlob);
expect(mockAxiosInstance.get).toHaveBeenCalledWith(url, {
responseType: 'blob',
responseReturn: 'body',
});
});
it('should merge provided config with default config', async () => {
const url = 'https://example.com/file';
const mockBlob = new Blob(['file content'], { type: 'text/plain' });
const mockResponse: Blob = mockBlob;
mockAxiosInstance.get.mockResolvedValueOnce(mockResponse);
const customConfig: AxiosRequestConfig = {
headers: { 'Custom-Header': 'value' },
};
const result = await fileDownloader.download(url, customConfig);
expect(result).toBeInstanceOf(Blob);
expect(result).toEqual(mockBlob);
expect(mockAxiosInstance.get).toHaveBeenCalledWith(url, {
...customConfig,
responseType: 'blob',
responseReturn: 'body',
});
});
it('should handle errors gracefully', async () => {
const url = 'https://example.com/file';
mockAxiosInstance.get.mockRejectedValueOnce(new Error('Network Error'));
await expect(fileDownloader.download(url)).rejects.toThrow('Network Error');
});
it('should handle empty URL gracefully', async () => {
const url = '';
mockAxiosInstance.get.mockRejectedValueOnce(
new Error('Request failed with status code 404'),
);
await expect(fileDownloader.download(url)).rejects.toThrow(
'Request failed with status code 404',
);
});
it('should handle null URL gracefully', async () => {
const url = null as unknown as string;
mockAxiosInstance.get.mockRejectedValueOnce(
new Error('Request failed with status code 404'),
);
await expect(fileDownloader.download(url)).rejects.toThrow(
'Request failed with status code 404',
);
});
});
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