From 93d87a8c6912b87ed8dbdce0e1b4d2765bc1df39 Mon Sep 17 00:00:00 2001
From: Yaro Shkvorets <shkvorets@gmail.com>
Date: Tue, 7 Jan 2025 19:44:52 -0500
Subject: [PATCH] Fix init for events with 2d arrays as params (#1884)

* fix tests generation for [][] event params

* changeset
---
 .changeset/quick-zoos-brake.md     | 5 +++++
 packages/cli/src/scaffold/tests.ts | 8 +++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/quick-zoos-brake.md

diff --git a/.changeset/quick-zoos-brake.md b/.changeset/quick-zoos-brake.md
new file mode 100644
index 000000000..0dbd96777
--- /dev/null
+++ b/.changeset/quick-zoos-brake.md
@@ -0,0 +1,5 @@
+---
+'@graphprotocol/graph-cli': patch
+---
+
+`graph init`: fix tests generation for events with [][] params #1878
diff --git a/packages/cli/src/scaffold/tests.ts b/packages/cli/src/scaffold/tests.ts
index 4f88ba5c1..2434dab38 100644
--- a/packages/cli/src/scaffold/tests.ts
+++ b/packages/cli/src/scaffold/tests.ts
@@ -119,7 +119,13 @@ const isNativeType = (type: string) => {
   return natives.some(rx => rx.test(type));
 };
 
-const fetchArrayInnerType = (type: string) => type.match(/Array<(.*?)>/);
+// get inner type: Array<T> -> T, Array<Array<T>> -> T
+const fetchArrayInnerType = (type: string): RegExpMatchArray | null => {
+  const match = type.match(/Array<(.+)>/);
+  if (!match) return null;
+
+  return fetchArrayInnerType(match[1]) || match;
+};
 
 // Generates the example test.ts file
 const generateExampleTest = (