Test missing property on FindXOrThrow returns null

Closes #15887
Closes #10642

Co-authored-by: Sergey Tatarintsev <tatarintsev@prisma.io>

packages/client/tests/functional/fluent-api/tests.ts

@@ -149,6 +149,18 @@ testMatrix.setupTestSuite(() => {
     expect(posts).toEqual([expect.objectContaining({ title })])
   })
 
+  test('findFirstOrThrow where nested entity is not found', async () => {
+    const property = await prisma.user
+      .findFirstOrThrow({
+        where: {
+          email,
+        },
+      })
+      .property()
+
+    expect(property).toBeNull()
+  })
+
   test('findUniqueOrThrow', async () => {
     const posts = await prisma.user
       .findUniqueOrThrow({
@@ -161,6 +173,18 @@ testMatrix.setupTestSuite(() => {
     expect(posts).toEqual([expect.objectContaining({ title })])
   })
 
+  test('findUniqueOrThrow where nested entity is not found', async () => {
+    const property = await prisma.user
+      .findUniqueOrThrow({
+        where: {
+          email,
+        },
+      })
+      .property()
+
+    expect(property).toBeNull()
+  })
+
   test('create', async () => {
     const posts = await prisma.user
       .create({