From b6ce6294f972d5f1690f0b335344cf9d1f65fed2 Mon Sep 17 00:00:00 2001
From: StyleShit <evyatar.daud@gmail.com>
Date: Sat, 13 Jul 2024 23:25:09 +0300
Subject: [PATCH] feat: throw for excess keys in objects

---
 .changeset/serious-crews-eat.md | 5 +++++
 src/__tests__/index.test.ts     | 9 +++++++++
 src/schemas/object.ts           | 6 ++++++
 3 files changed, 20 insertions(+)
 create mode 100644 .changeset/serious-crews-eat.md

diff --git a/.changeset/serious-crews-eat.md b/.changeset/serious-crews-eat.md
new file mode 100644
index 0000000..90fb2db
--- /dev/null
+++ b/.changeset/serious-crews-eat.md
@@ -0,0 +1,5 @@
+---
+'bodek': patch
+---
+
+Throw for excess keys in objects
diff --git a/src/__tests__/index.test.ts b/src/__tests__/index.test.ts
index bd49e38..610a16b 100644
--- a/src/__tests__/index.test.ts
+++ b/src/__tests__/index.test.ts
@@ -94,6 +94,15 @@ describe('Bodek', () => {
 
 		// Assert - invalid.
 		expect(() => schema.parse({ foo: 'hello' })).toThrow('Missing key bar');
+
+		expect(() =>
+			schema.parse({
+				foo: 'hello',
+				bar: 123,
+				nested: { baz: 'world' },
+				extra: true,
+			}),
+		).toThrow('Unexpected excess key extra');
 	});
 
 	it('should infer types', () => {
diff --git a/src/schemas/object.ts b/src/schemas/object.ts
index 760b706..22f0374 100644
--- a/src/schemas/object.ts
+++ b/src/schemas/object.ts
@@ -35,6 +35,12 @@ export class ObjectSchema<Shape extends ShapeSchema> extends Schema<
 			schema.parse(value[key as never]);
 		});
 
+		Object.keys(value).forEach((key) => {
+			if (!(key in this.shape)) {
+				throw new Error(`Unexpected excess key ${key}`);
+			}
+		});
+
 		return value as never;
 	}
 }