test: testing toFields length

yarn-project/circuits.js/src/structs/contract_deployment_data.test.ts

@@ -1,6 +1,8 @@
+import { CONTRACT_DEPLOYMENT_DATA_LENGTH } from '../constants.gen.js';
 import { makeContractDeploymentData } from '../tests/factories.js';
 import { ContractDeploymentData } from './contract_deployment_data.js';
 
+
 describe('ContractDeploymentData', () => {
   it(`serializes to buffer and deserializes it back`, () => {
     const expected = makeContractDeploymentData(1);
@@ -14,4 +16,10 @@ describe('ContractDeploymentData', () => {
     const target = ContractDeploymentData.empty();
     expect(target.isEmpty()).toBe(true);
   });
-});
+
+  it('number of fields matches constant', () => {
+    const target = makeContractDeploymentData(327);
+    const fields = target.toFields();
+    expect(fields.length).toBe(CONTRACT_DEPLOYMENT_DATA_LENGTH);
+  });
+});

yarn-project/circuits.js/src/structs/function_data.test.ts

@@ -1,13 +1,24 @@
 import { FunctionSelector } from '@aztec/foundation/abi';
 
+import { FUNCTION_DATA_LENGTH } from '../constants.gen.js';
 import { FunctionData } from './function_data.js';
 
 describe('FunctionData', () => {
+  let functionData: FunctionData;
+
+  beforeAll(() => {
+    functionData = new FunctionData(new FunctionSelector(123), false, true, true);
+  });
+
   it(`serializes to buffer and deserializes it back`, () => {
-    const expected = new FunctionData(new FunctionSelector(123), false, true, true);
-    const buffer = expected.toBuffer();
+    const buffer = functionData.toBuffer();
     const res = FunctionData.fromBuffer(buffer);
-    expect(res).toEqual(expected);
+    expect(res).toEqual(functionData);
     expect(res.isEmpty()).toBe(false);
   });
+
+  it('number of fields matches constant', () => {
+    const fields = functionData.toFields();
+    expect(fields.length).toBe(FUNCTION_DATA_LENGTH);
+  });
 });

yarn-project/circuits.js/src/structs/public_circuit_public_inputs.test.ts

@@ -1,3 +1,4 @@
+import { PUBLIC_CIRCUIT_PUBLIC_INPUTS_LENGTH } from '../constants.gen.js';
 import { makePublicCircuitPublicInputs } from '../tests/factories.js';
 import { PublicCircuitPublicInputs } from './public_circuit_public_inputs.js';
 
@@ -15,4 +16,10 @@ describe('PublicCircuitPublicInputs', () => {
     const target = PublicCircuitPublicInputs.empty();
     expect(target.isEmpty()).toBe(true);
   });
+
+  it("number of fields matches constant", () => {
+    const target = makePublicCircuitPublicInputs(327);
+    const fields = target.toFields();
+    expect(fields.length).toBe(PUBLIC_CIRCUIT_PUBLIC_INPUTS_LENGTH);
+  });
 });