svelte/test/runtime/samples/dev-warning-readonly-window.../_config.js

export default {
	compileOptions: {
		dev: true
	},

	test({ assert, component }) {
		try {
			component.width = 99;
			throw new Error('Expected an error');
		} catch (err) {
			assert.equal(err.message, `<Main>: Cannot set read-only property 'width'`);
		}
	}
};
throw if user sets read-only properties in dev mode 8 years ago			`export default {`
better error for missing store - fixes #1807 6 years ago			`compileOptions: {`
			`dev: true`
			`},`
throw if user sets read-only properties in dev mode 8 years ago
Implement reactive assignments (#1839) This also includes elements of RFCs 2 and 3 6 years ago			`test({ assert, component }) {`
throw if user sets read-only properties in dev mode 8 years ago			`try {`
Implement reactive assignments (#1839) This also includes elements of RFCs 2 and 3 6 years ago			`component.width = 99;`
			`throw new Error('Expected an error');`
			`} catch (err) {`
fix tests 6 years ago			assert.equal(err.message, `<Main>: Cannot set read-only property 'width'`);
throw if user sets read-only properties in dev mode 8 years ago			`}`
			`}`
			`};`