From e6c2f153b7130e27168b2aaa0c7aba88a9220332 Mon Sep 17 00:00:00 2001
From: Tobbe Lundberg <tobbe@tlundberg.com>
Date: Tue, 14 May 2024 11:48:17 +0200
Subject: [PATCH 1/2] fix(functions-test): Fix mockHttpEvent for null bodies

---
 packages/testing/src/api/apiFunction.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/testing/src/api/apiFunction.ts b/packages/testing/src/api/apiFunction.ts
index ae77d97ba6c6..62d4770ebd69 100644
--- a/packages/testing/src/api/apiFunction.ts
+++ b/packages/testing/src/api/apiFunction.ts
@@ -43,9 +43,12 @@ export const mockHttpEvent = ({
   const payloadAsString =
     typeof payload === 'string' ? payload : JSON.stringify(payload)
 
-  const body = isBase64Encoded
-    ? Buffer.from(payloadAsString || '').toString('base64')
-    : payloadAsString
+  const body =
+    payload === null
+      ? null
+      : isBase64Encoded
+        ? Buffer.from(payloadAsString || '').toString('base64')
+        : payloadAsString
 
   return {
     body,

From d56f1911624e2ffed727bcc4596303967386ba04 Mon Sep 17 00:00:00 2001
From: Tobbe Lundberg <tobbe@tlundberg.com>
Date: Tue, 14 May 2024 13:49:34 +0200
Subject: [PATCH 2/2] changeset

---
 .changesets/10570.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changesets/10570.md

diff --git a/.changesets/10570.md b/.changesets/10570.md
new file mode 100644
index 000000000000..679568957b17
--- /dev/null
+++ b/.changesets/10570.md
@@ -0,0 +1,5 @@
+- fix(functions-test): Fix mockHttpEvent for null bodies (#10570) by @Tobbe
+
+With an empty/null payload (which it is by default) the body should be empty, not the string `'null'`
+
+This is a breaking change for anyone who was depending on the current "null" behavior in their api function tests. More specifically, if you're **NOT** passing `body` or `payload` to `mockHttpEvent({ ... })` or if you're trying to explicitly set `payload` to `null` you might have to update your tests.