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import { transformAsync } from '@babel/core';
import plugin from '../extension-resolver';
import fs from 'fs';
jest.mock('fs');
describe('babel-plugin-extension-resolver', () => {
const pluginOptions = {
modulesToResolve: ['instantsearch.js'],
};
const options = {
filename: '/path/to/src/file.js',
configFile: false,
babelrc: false,
plugins: [[plugin, pluginOptions]],
};
afterEach(() => {
jest.resetAllMocks();
});
it('name=babel-plugin-extension-resolver', () =>
expect(plugin({ types: {} }, {}).name).toStrictEqual(
'babel-plugin-extension-resolver'
));
it('ignores empty code', async () => {
expect(await transformAsync('', options)).toHaveProperty('code', '');
});
it('ignores module imports', async () => {
expect(
await transformAsync('import path from "path";', options)
).toHaveProperty('code', 'import path from "path";');
});
it('finds .js files', async () => {
fs.__setMockFiles([
'/path/to/src/other.js',
'/path/to/src/other.ts',
'/path/to/src/other.tsx',
]);
expect(
await transformAsync('import other from "./other";', options)
).toHaveProperty('code', 'import other from "./other.js";');
});
it('finds .ts files', async () => {
fs.__setMockFiles(['/path/to/src/other.ts', '/path/to/src/other.tsx']);
expect(
await transformAsync('import other from "./other";', options)
).toHaveProperty('code', 'import other from "./other.js";');
});
it('finds .tsx files', async () => {
fs.__setMockFiles(['/path/to/src/other.tsx']);
expect(
await transformAsync('import other from "./other";', options)
).toHaveProperty('code', 'import other from "./other.js";');
});
it('finds files in parent directory', async () => {
fs.__setMockFiles(['/path/to/other.js', '/path/to/src/other.js']);
expect(
await transformAsync('import other from "../other";', options)
).toHaveProperty('code', 'import other from "../other.js";');
});
it('finds files in child directory', async () => {
fs.__setMockFiles(['/path/to/src/other.js', '/path/to/src/child/other.js']);
expect(
await transformAsync('import other from "./child/other";', options)
).toHaveProperty('code', 'import other from "./child/other.js";');
});
it('uses index file', async () => {
fs.__setMockFiles(['/path/to/src/other/index.js']);
expect(
await transformAsync('import other from "./other";', options)
).toHaveProperty('code', 'import other from "./other/index.js";');
});
it('uses modulesToResolve', async () => {
fs.__setMockFiles(['/path/to/src/other/index.js']);
expect(
await transformAsync(
'import index from "instantsearch.js/es/widgets/index/index";\n' +
'import root from "instantsearch.js";\n' +
'import other from "different-module/other";',
options
)
).toHaveProperty(
'code',
'import index from "instantsearch.js/es/widgets/index/index.js";\n' +
'import root from "instantsearch.js";\n' +
'import other from "different-module/other";'
);
});
it('works with multiple imports', async () => {
fs.__setMockFiles(['/path/to/src/other.js', '/path/to/src/another.js']);
expect(
await transformAsync(
'import other from "./other";\nimport another from "./another";',
options
)
).toHaveProperty(
'code',
'import other from "./other.js";\nimport another from "./another.js";'
);
});
it('works with export from', async () => {
fs.__setMockFiles(['/path/to/src/other.js']);
expect(
await transformAsync('export * from "./other"', options)
).toHaveProperty('code', 'export * from "./other.js";');
});
it('ignores require()', async () => {
fs.__setMockFiles(['/path/to/src/other.js', '/path/to/src/another.js']);
expect(await transformAsync('require("./other");', options)).toHaveProperty(
'code',
'require("./other");'
);
});
it('ignores other function calls', async () => {
fs.__setMockFiles(['/path/to/src/other.js']);
expect(
await transformAsync('requireOOPS("./other");', options)
).toHaveProperty('code', 'requireOOPS("./other");');
});
it('errors if file not found', async () => {
fs.__setMockFiles([]);
await expect(() =>
transformAsync('import other from "./other";', options)
).rejects.toThrow(
'/path/to/src/file.js: import for "./other" could not be resolved'
);
});
it('errors if module file not found', async () => {
fs.__setMockFiles([]);
await expect(() =>
transformAsync(
'import other from "instantsearch.js/non-existing-folder-this-can-never-exist/qsdf/gh/jklm";',
options
)
).rejects.toThrow(
"/path/to/src/file.js: Cannot find module 'instantsearch.js/non-existing-folder-this-can-never-exist/qsdf/gh/jklm' from 'scripts/babel/extension-resolver.js'"
);
});
});
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