fix: mock internal functions without parameters (#33)

solidity/contracts/utils/ContractB.sol

@@ -9,8 +9,4 @@ contract ContractB is IContractB {
     stringVariable = _stringVariable;
     _result = true;
   }
-
-  function _internalNoReturn() internal {
-    stringVariable = 'internalNoReturn';
-  }
 }

solidity/contracts/utils/ContractD.sol

@@ -15,4 +15,12 @@ contract ContractD {
   function _getVariables(uint256 _uintVariable) internal view virtual returns (bool, uint256, string memory) {
     return (true, 111, 'test');
   }
+
+  function _internalNoInputNoOutput() internal virtual {
+    _internalUintVar = 11;
+  }
+
+  function _internalViewNoInputNoOutput() internal view virtual {
+    uint256 __internalUintVar = _internalUintVar;
+  }
 }

src/templates/mockInternalFunctionTemplate.hbs

@@ -1,18 +1,22 @@
 {{#if isView}}
+{{#if outputs}}
 struct {{functionName}}Output {
   {{#each outputTypes}}
   {{this}} {{lookup ../outputNames @index}};
   {{/each}}
 }
 
 mapping(bytes32 => {{functionName}}Output) private {{functionName}}Outputs;
+{{/if}}
 bytes32[] private {{functionName}}InputHashes;
 {{/if}}
 
 function mock_call_{{functionName}}({{parameters}}) public {
   {{#if isView}}
   bytes32 _key = keccak256(abi.encode({{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}));
+  {{#if outputs}}
   {{functionName}}Outputs[_key] = {{functionName}}Output({{#each outputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}});
+  {{/if}}
   for (uint256 _i; _i < {{functionName}}InputHashes.length; ++_i) {
     if (_key == {{functionName}}InputHashes[_i]) {
       return;
@@ -22,7 +26,7 @@ function mock_call_{{functionName}}({{parameters}}) public {
   {{else}}
   vm.mockCall(
     address(this),
-    abi.encodeWithSignature("{{signature}}", {{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}),
+    abi.encodeWithSignature("{{signature}}"{{#if inputs}}, {{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}{{/if}}),
     abi.encode({{#each outputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}})
   );
   {{/if}}
@@ -33,14 +37,17 @@ function {{functionName}}({{inputs}}) internal {{#if isView}}view {{/if}}overrid
   bytes32 _key = keccak256(abi.encode({{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}));
   for (uint256 _i; _i < {{functionName}}InputHashes.length; ++_i) {
     if (_key == {{functionName}}InputHashes[_i]) {
+      {{#if outputs}}
       {{functionName}}Output memory _output = {{functionName}}Outputs[_key];
+      {{/if}}
       return ({{#each outputNames}}_output.{{this}}{{#unless @last}}, {{/unless}}{{/each}});
     }
   }
   return super.{{functionName}}({{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}});
   {{else}}
-  (bool _success, bytes memory _data) = address(this).call(abi.encodeWithSignature("{{signature}}", {{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}));
-  ({{#each outputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}) = _success ? abi.decode(_data, ({{#each outputTypes}}{{this}}{{#unless @last}}, {{/unless}}{{/each}})) : super.{{functionName}}({{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}});
+  (bool _success, bytes memory _data) = address(this).call(abi.encodeWithSignature("{{signature}}"{{#if inputs}}, {{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}{{/if}}));
+  if (_success) return abi.decode(_data, ({{#each outputTypes}}{{this}}{{#unless @last}}, {{/unless}}{{/each}}));
+  else return super.{{functionName}}({{#each inputNames}}{{this}}{{#unless @last}}, {{/unless}}{{/each}});
   {{/if}}
 }
 {{nl}}

test/e2e/get-internal-functions.spec.ts

@@ -97,18 +97,18 @@ describe('E2E: getInternalMockFunctions', () => {
     expect(param1).to.not.be.undefined;
     expect(param1?.typeDescriptions.typeString).to.equal('uint256');
 
-    const return0 = func.returnParameters.parameters.find((param) => param.name === '_returnParam0');
-    expect(return0).to.not.be.undefined;
-    expect(return0?.typeDescriptions.typeString).to.equal('bool');
-
-    const return1 = func.returnParameters.parameters.find((param) => param.name === '_returnParam1');
-    expect(return1).to.not.be.undefined;
-    expect(return1?.typeDescriptions.typeString).to.equal('uint256');
-
-    const return2 = func.returnParameters.parameters.find((param) => param.name === '_returnParam2');
-    expect(return2).to.not.be.undefined;
-    expect(return2?.typeDescriptions.typeString).to.equal('string');
-    expect(return2?.storageLocation).to.equal('memory');
+    const returnParam1 = func.returnParameters.parameters.find((param) => param.name === '_returnParam0');
+    expect(returnParam1).to.not.be.undefined;
+    expect(returnParam1?.typeDescriptions.typeString).to.equal('bool');
+
+    const returnParam2 = func.returnParameters.parameters.find((param) => param.name === '_returnParam1');
+    expect(returnParam2).to.not.be.undefined;
+    expect(returnParam2?.typeDescriptions.typeString).to.equal('uint256');
+
+    const returnParam3 = func.returnParameters.parameters.find((param) => param.name === '_returnParam2');
+    expect(returnParam3).to.not.be.undefined;
+    expect(returnParam3?.typeDescriptions.typeString).to.equal('string');
+    expect(returnParam3?.storageLocation).to.equal('memory');
   });
 
   it('MockContractD must include internal view function mock call', async () => {
@@ -150,17 +150,17 @@ describe('E2E: getInternalMockFunctions', () => {
     expect(param1).to.not.be.undefined;
     expect(param1?.typeDescriptions.typeString).to.equal('uint256');
 
-    const return0 = func.returnParameters.parameters.find((param) => param.name === '_returnParam0');
-    expect(return0).to.not.be.undefined;
-    expect(return0?.typeDescriptions.typeString).to.equal('bool');
+    const returnParam1 = func.returnParameters.parameters.find((param) => param.name === '_returnParam0');
+    expect(returnParam1).to.not.be.undefined;
+    expect(returnParam1?.typeDescriptions.typeString).to.equal('bool');
 
-    const return1 = func.returnParameters.parameters.find((param) => param.name === '_returnParam1');
-    expect(return1).to.not.be.undefined;
-    expect(return1?.typeDescriptions.typeString).to.equal('uint256');
+    const returnParam2 = func.returnParameters.parameters.find((param) => param.name === '_returnParam1');
+    expect(returnParam2).to.not.be.undefined;
+    expect(returnParam2?.typeDescriptions.typeString).to.equal('uint256');
 
-    const return2 = func.returnParameters.parameters.find((param) => param.name === '_returnParam2');
-    expect(return2).to.not.be.undefined;
-    expect(return2?.typeDescriptions.typeString).to.equal('string');
-    expect(return2?.storageLocation).to.equal('memory');
+    const returnParam3 = func.returnParameters.parameters.find((param) => param.name === '_returnParam2');
+    expect(returnParam3).to.not.be.undefined;
+    expect(returnParam3?.typeDescriptions.typeString).to.equal('string');
+    expect(returnParam3?.storageLocation).to.equal('memory');
   });
 });