Tolerate whitespace between `require` and terminating `;` (#884)

lib/registrar.js

@@ -23,6 +23,14 @@ class Registrar {
     this.modifierWhitelist = [];
   }
 
+  _seekSemiColon(contract, pos) {
+    const end = pos + 5;
+    for(pos; pos <= end; pos++) {
+      if (contract[pos] === ';') break;
+    }
+    return pos;
+  }
+
   /**
    * Adds injection point to injection points map
    * @param  {Object} contract instrumentation target
@@ -441,7 +449,7 @@ class Registrar {
     );
     this._createInjectionPoint(
       contract,
-      expression.range[1] + 2,
+      this._seekSemiColon(contract.instrumented, expression.range[1] + 1) + 1,
       {
         type: 'injectRequirePost',
         branchId: contract.branchId,

test/sources/solidity/contracts/statements/require.sol

@@ -0,0 +1,9 @@
+pragma solidity >=0.8.0 <0.9.0;
+
+contract Test {
+    function a(uint x) public {
+        require(true);
+        require(true)   ;
+        require(true) ;
+    }
+}

test/units/statements.js

@@ -85,6 +85,11 @@ describe('generic statements', () => {
     util.report(info.solcOutput.errors);
   });
 
+  it('should instrument require statements when semi-colon is separated by spaces', () => {
+    const info = util.instrumentAndCompile('statements/require');
+    util.report(info.solcOutput.errors);
+  });
+
   it('should cover an emitted event statement', async function() {
     const contract = await util.bootstrapCoverage('statements/emit-coverage', api, this.provider);
     coverage.addContract(contract.instrumented, util.filePath);