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