From 84ccf43f0ba1bc9c5d26082777b844a7afbe88d2 Mon Sep 17 00:00:00 2001
From: Phil Parsons <p-m-p@users.noreply.github.com>
Date: Thu, 29 Sep 2022 11:30:50 +0100
Subject: [PATCH 1/2] Check vitest global for @emotion/react loaded twice
 warning

---
 .changeset/loud-dancers-return.md | 5 +++++
 flow-typed/npm/vitest_vx.x.x.js   | 1 +
 packages/react/src/index.js       | 4 ++--
 3 files changed, 8 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/loud-dancers-return.md
 create mode 100644 flow-typed/npm/vitest_vx.x.x.js

diff --git a/.changeset/loud-dancers-return.md b/.changeset/loud-dancers-return.md
new file mode 100644
index 000000000..0f0d46288
--- /dev/null
+++ b/.changeset/loud-dancers-return.md
@@ -0,0 +1,5 @@
+---
+'@emotion/react': patch
+---
+
+Include vitest global check when omitting the warning about duplicate instantiation in mocked modules. Will only capture vitest global `vi` if globals are configured.
diff --git a/flow-typed/npm/vitest_vx.x.x.js b/flow-typed/npm/vitest_vx.x.x.js
new file mode 100644
index 000000000..4fbf0e5de
--- /dev/null
+++ b/flow-typed/npm/vitest_vx.x.x.js
@@ -0,0 +1 @@
+declare var vi: {}
diff --git a/packages/react/src/index.js b/packages/react/src/index.js
index 24323ed22..11107901d 100644
--- a/packages/react/src/index.js
+++ b/packages/react/src/index.js
@@ -17,9 +17,9 @@ export { default as css } from './css'
 if (process.env.NODE_ENV !== 'production') {
   const isBrowser = typeof document !== 'undefined'
   // #1727 for some reason Jest evaluates modules twice if some consuming module gets mocked with jest.mock
-  const isJest = typeof jest !== 'undefined'
+  const isTestEnv = typeof jest !== 'undefined' || typeof vi !== 'undefined'
 
-  if (isBrowser && !isJest) {
+  if (isBrowser && !isTestEnv) {
     // globalThis has wide browser support - https://caniuse.com/?search=globalThis, Node.js 12 and later
     const globalContext =
       // $FlowIgnore

From 5d31936358aff34ae05b2bf9cee0a69140382f76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mateusz=20Burzy=C5=84ski?= <mateuszburzynski@gmail.com>
Date: Thu, 27 Oct 2022 09:35:26 +0200
Subject: [PATCH 2/2] code review tweaks

---
 .changeset/loud-dancers-return.md | 2 +-
 packages/react/src/index.js       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.changeset/loud-dancers-return.md b/.changeset/loud-dancers-return.md
index 0f0d46288..c0a93cf7e 100644
--- a/.changeset/loud-dancers-return.md
+++ b/.changeset/loud-dancers-return.md
@@ -2,4 +2,4 @@
 '@emotion/react': patch
 ---
 
-Include vitest global check when omitting the warning about duplicate instantiation in mocked modules. Will only capture vitest global `vi` if globals are configured.
+Do not warn about `@emotion/react` being loaded twice in Vitest as that might easily happen with mocked modules.
diff --git a/packages/react/src/index.js b/packages/react/src/index.js
index 11107901d..3b4a3ad6a 100644
--- a/packages/react/src/index.js
+++ b/packages/react/src/index.js
@@ -16,7 +16,7 @@ export { default as css } from './css'
 
 if (process.env.NODE_ENV !== 'production') {
   const isBrowser = typeof document !== 'undefined'
-  // #1727 for some reason Jest evaluates modules twice if some consuming module gets mocked with jest.mock
+  // #1727, #2905 for some reason Jest and Vitest evaluate modules twice if some consuming module gets mocked
   const isTestEnv = typeof jest !== 'undefined' || typeof vi !== 'undefined'
 
   if (isBrowser && !isTestEnv) {