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// @flow
import { rollup } from 'rollup';
import babel from 'rollup-plugin-babel';
import replace from 'rollup-plugin-replace';
const DEV_SIZE = 201;
const PROD_SIZE = 176;
const getCode = async ({ mode }): Promise<string> => {
const bundle = await rollup({
input: './src/index.js',
plugins: [
replace({ 'process.env.NODE_ENV': JSON.stringify(mode) }),
babel(),
],
});
const { code } = await bundle.generate({ format: 'esm' });
return code;
};
it(`development mode size should be ${DEV_SIZE}`, async () => {
const code: string = await getCode({ mode: 'development' });
expect(code.length).toBe(DEV_SIZE);
});
it(`production mode size should be ${PROD_SIZE}`, async () => {
const code: string = await getCode({ mode: 'production' });
expect(code.length).toBe(PROD_SIZE);
});
const containsDevCode = (code: string) => {
return code.includes(`throw new Error(prefix + ": " + (message || ''))`);
};
const containsProdCode = (code: string) => {
return code.includes(`throw new Error(prefix)`);
};
it('should include the message in dev builds', async () => {
const code: string = await getCode({ mode: 'development' });
expect(containsDevCode(code)).toBe(true);
expect(containsProdCode(code)).toBe(false);
});
it('not should include the message in prod builds', async () => {
const code: string = await getCode({ mode: 'production' });
expect(containsDevCode(code)).toBe(false);
expect(containsProdCode(code)).toBe(true);
});
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