clean up garbage between tests

Author: quantizor

test/__snapshots__/styleSheetSerializer.spec.js.snap

@@ -452,10 +452,6 @@ exports[`referring to other components: mount 1`] = `
   background-color: red;
 }
 
-@media (max-width:600px) {
-
-}
-
 <styled.a
   href="#"
 >
@@ -548,10 +544,6 @@ exports[`referring to other components: react-test-renderer 1`] = `
   background-color: red;
 }
 
-@media (max-width:600px) {
-
-}
-
 <a
   className="c0"
   href="#"
@@ -630,10 +622,6 @@ exports[`referring to other components: react-testing-library 1`] = `
   background-color: red;
 }
 
-@media (max-width:600px) {
-
-}
-
 <a
   class="c0"
   href="#"

test/styleSheetSerializer.spec.js

@@ -4,6 +4,7 @@ import React from 'react';
 import renderer from 'react-test-renderer';
 import styled, { ThemeContext, ThemeProvider } from 'styled-components';
 import '../src';
+import { resetStyleSheet } from '../src/utils';
 
 const toMatchSnapshot = (name, component) => {
   expect(renderer.create(component).toJSON()).toMatchSnapshot('react-test-renderer');
@@ -19,6 +20,10 @@ const shallowWithTheme = (tree, theme) => {
   return shallow(tree);
 };
 
+beforeEach(() => {
+  resetStyleSheet();
+});
+
 it('null', () => {
   expect(null).toMatchSnapshot();
 });