PublicKeys test

noir-projects/aztec-nr/aztec/src/keys/public_keys.nr

@@ -115,6 +115,16 @@ fn compute_public_keys_hash() {
     assert(actual.to_field() == expected_public_keys_hash);
 }
 
+#[test]
+fn compute_empty_hash() {
+    let keys = PublicKeys::empty();
+
+    let actual = keys.hash();
+    let test_data_empty_hash = 0x0000000000000000000000000000000000000000000000000000000000000000;
+
+    assert(actual.to_field() == test_data_empty_hash);
+}
+
 #[test]
 fn test_public_keys_serialization() {
     let keys = PublicKeys {

yarn-project/circuits.js/src/types/public_keys.test.ts

@@ -0,0 +1,31 @@
+import { Fr, Point } from '@aztec/foundation/fields';
+import { updateInlineTestData } from '@aztec/foundation/testing';
+
+import { PublicKeys } from './public_keys.js';
+
+describe('PublicKeys', () => {
+  it('computes public keys hash', () => {
+    const keys = new PublicKeys(
+      new Point(new Fr(1n), new Fr(2n), false),
+      new Point(new Fr(3n), new Fr(4n), false),
+      new Point(new Fr(5n), new Fr(6n), false),
+      new Point(new Fr(7n), new Fr(8n), false),
+    );
+
+    const hash = keys.hash().toString();
+    expect(hash).toMatchInlineSnapshot(`"0x146f68c0e0ba4067d61a3304bbfdec0797d5df1357db6c01247c48bfb345c7d7"`);
+
+    // Run with AZTEC_GENERATE_TEST_DATA=1 to update noir test data
+    updateInlineTestData('noir-projects/aztec-nr/aztec/src/keys/public_keys.nr', 'expected_public_keys_hash', hash);
+  });
+
+  it('computes empty keys hash', () => {
+    const keys = PublicKeys.empty();
+
+    const hash = keys.hash().toString();
+    expect(hash).toMatchInlineSnapshot(`"0x0000000000000000000000000000000000000000000000000000000000000000"`);
+
+    // Run with AZTEC_GENERATE_TEST_DATA=1 to update noir test data
+    updateInlineTestData('noir-projects/aztec-nr/aztec/src/keys/public_keys.nr', 'test_data_empty_hash', hash);
+  });
+});