drop v1 support

README.md

@@ -45,7 +45,6 @@ Table of Contents
       * [Preact](#preact)
    * [toHaveStyleRule](#tohavestylerule)
    * [Global installation](#global-installation)
-   * [styled-components < v2](#styled-components--v2)
    * [Contributing](#contributing)
 
 # Snapshot Testing
@@ -370,17 +369,6 @@ And import the library once in the `setupTest.js` as follows:
 import 'jest-styled-components'
 ```
 
-# styled-components < v2
-
-To use this package with styled-components < v2 (e.g. v1.4.6) the following annotation must be added at the top of the test files.
-Consequently, it won't be possible to use Enzyme's full DOM rendering.
-
-```js
-/**
- * @jest-environment node
- */
-```
-
 # Contributing
 
 Please [open an issue](https://github.com/styled-components/jest-styled-components/issues/new) and discuss with us before submitting a PR.

src/styleSheetSerializer.js

@@ -1,5 +1,5 @@
 const css = require('css')
-const { getCSS, getHashes, isOverV2 } = require('./utils')
+const { getCSS, getHashes } = require('./utils')
 
 const KEY = '__jest-styled-components__'
 
@@ -99,10 +99,7 @@ const styleSheetSerializer = {
 
     const hashes = getHashes()
     let classNames = [...getClassNames(nodes)]
-
-    if (isOverV2()) {
-      classNames = filterClassNames(classNames, hashes)
-    }
+    classNames = filterClassNames(classNames, hashes)
 
     const style = getStyle(classNames)
     const code = print(val)

src/utils.js

@@ -1,13 +1,10 @@
 const css = require('css')
 const { ServerStyleSheet, isStyledComponent } = require('styled-components')
 
-const isOverV3 = !!isStyledComponent
-const isOverV2 = () => !!ServerStyleSheet
-
 let StyleSheet
 
 /* eslint-disable */
-if (isOverV3) {
+if (!!isStyledComponent) {
   const secretInternals = require('styled-components')
     .__DO_NOT_USE_OR_YOU_WILL_BE_HAUNTED_BY_SPOOKY_GHOSTS
 
@@ -28,11 +25,7 @@ if (isOverV3) {
 
 const isServer = () => typeof document === 'undefined'
 
-const resetStyleSheet = () => {
-  if (isOverV2()) {
-    StyleSheet.reset(isServer())
-  }
-}
+const resetStyleSheet = () => StyleSheet.reset(isServer())
 
 const getHTML = () =>
   isServer()
@@ -52,18 +45,7 @@ const extract = regex => {
 
 const getStyle = () => extract(/<style[^>]*>([^<]*)</g)
 
-const getRules = () =>
-  StyleSheet.globalStyleSheet.sheet && StyleSheet.componentStyleSheet.sheet
-    ? StyleSheet.rules()
-        .map(rule => rule.cssText)
-        .join('\n')
-    : ''
-
-const getCSS = () => {
-  const style = isOverV2() ? getStyle() : getRules()
-
-  return css.parse(style)
-}
+const getCSS = () => css.parse(getStyle())
 
 const getClassNames = () =>
   extract(/data-styled-components="([^"]*)"/g).split(/\s/)
@@ -72,14 +54,11 @@ const getComponentIDs = () =>
   extract(/sc-component-id: ([^\\*\\/]*) \*\//g).split(/\s/)
 
 const getHashes = () =>
-  isOverV2()
-    ? getClassNames()
-        .concat(getComponentIDs())
-        .filter(Boolean)
-    : []
+  getClassNames()
+    .concat(getComponentIDs())
+    .filter(Boolean)
 
 module.exports = {
-  isOverV2,
   resetStyleSheet,
   getCSS,
   getHashes,