Improve coverage (#409)

+ Remove unused code from `lib/parse.js`
+ Add invalid reporter test
+ Remove un-hittable try/catch around backup client load in  API.ganache

lib/api.js

@@ -150,13 +150,7 @@ class API {
     catch(err) {
       this.ui.report('vm-fail', []);
       this.client = require('ganache-core-sc');
-
-      try { await this.attachToVM() }
-
-      catch(err) {
-        err.message = `${this.ui.generate('server-fail', [address])} ${err.message}`;
-        throw err;
-      }
+      await this.attachToVM();
     }
 
     this.ui.report('server', [address]);
@@ -283,10 +277,6 @@ class API {
     return newCoverage;
   }
 
-  toRelativePath(absolutePath, parentDir){
-    return absolutePath.split(`/${parentDir}`)[1]
-  }
-
   // =======
   // Logging
   // =======

lib/parse.js

@@ -9,7 +9,6 @@ const register = new Registrar();
 const parse = {};
 
 parse.AssignmentExpression = function(contract, expression) {
-  register.prePosition(expression);
   register.statement(contract, expression);
 };
 
@@ -41,9 +40,10 @@ parse.FunctionCall = function(contract, expression) {
   }
 };
 
-parse.ConditionalExpression = function(contract, expression) {
+parse.Conditional = function(contract, expression) {
   register.statement(contract, expression);
-  register.conditionalExpression(contract, expression);
+  // TODO: Investigate node structure
+  // There are potential substatements here we aren't measuring
 };
 
 parse.ContractDefinition = function(contract, expression) {
@@ -108,18 +108,11 @@ parse.IfStatement = function(contract, expression) {
   }
 };
 
-parse.InterfaceStatement = function(contract, expression) {
-  parse.ContractOrLibraryStatement(contract, expression);
-};
-
-parse.LibraryStatement = function(contract, expression) {
-  parse.ContractOrLibraryStatement(contract, expression);
-};
-
-parse.MemberExpression = function(contract, expression) {
+// TODO: Investigate Node structure
+/*parse.MemberAccess = function(contract, expression) {
   parse[expression.object.type] &&
   parse[expression.object.type](contract, expression.object);
-};
+};*/
 
 parse.Modifiers = function(contract, modifiers) {
   if (modifiers) {
@@ -151,10 +144,11 @@ parse.ReturnStatement = function(contract, expression) {
   register.statement(contract, expression);
 };
 
-parse.UnaryExpression = function(contract, expression) {
-  parse[expression.argument.type] &&
-  parse[expression.argument.type](contract, expression.argument);
-};
+// TODO:Investigate node structure
+/*parse.UnaryOperation = function(contract, expression) {
+  parse[subExpression.argument.type] &&
+  parse[subExpression.argument.type](contract, expression.argument);
+};*/
 
 parse.UsingStatement = function (contract, expression) {
   parse[expression.for.type] &&
@@ -165,12 +159,6 @@ parse.VariableDeclarationStatement = function (contract, expression) {
   register.statement(contract, expression);
 };
 
-parse.VariableDeclarationTuple = function (contract, expression) {
-  register.statement(contract, expression);
-  parse[expression.declarations[0].id.type] &&
-  parse[expression.declarations[0].id.type](contract, expression.declarations[0].id);
-};
-
 parse.WhileStatement = function (contract, expression) {
   register.statement(contract, expression);
   parse[expression.body.type] &&

lib/registrar.js

@@ -19,19 +19,6 @@ class Registrar {
       : contract.injectionPoints[key] = [value];
   }
 
-  /**
-   * TODO - idk what this is anymore
-   * @param  {Object} expression AST node
-   */
-  prePosition(expression) {
-    if (
-      expression.right.type === 'ConditionalExpression' &&
-      expression.left.type === 'MemberExpression'
-    ) {
-      expression.range[0] -= 2;
-    }
-  }
-
   /**
    * Registers injections for statement measurements
    * @param  {Object} contract   instrumentation target

test/integration/projects/libraries/contracts/Migrations.sol

@@ -0,0 +1,23 @@
+pragma solidity >=0.4.21 <0.6.0;
+
+contract Migrations {
+  address public owner;
+  uint public last_completed_migration;
+
+  constructor() public {
+    owner = msg.sender;
+  }
+
+  modifier restricted() {
+    if (msg.sender == owner) _;
+  }
+
+  function setCompleted(uint completed) public restricted {
+    last_completed_migration = completed;
+  }
+
+  function upgrade(address new_address) public restricted {
+    Migrations upgraded = Migrations(new_address);
+    upgraded.setCompleted(last_completed_migration);
+  }
+}

test/integration/projects/libraries/contracts/UsesPure.sol

@@ -1,10 +1,10 @@
 pragma solidity ^0.5.0;
 
-import "./../../externalSources/Face.sol";
-import "./../../externalSources/PureView.sol";
-import "./../../externalSources/CLibrary.sol";
+import "./_Interface.sol";
+import "./PureView.sol";
+import "./CLibrary.sol";
 
-contract TotallyPure is PureView, Face {
+contract UsesPure is PureView, _Interface {
   uint onehundred = 99;
 
   function usesThem() public view {

test/integration/projects/libraries/contracts/_Interface.sol

@@ -1,6 +1,6 @@
 pragma solidity ^0.5.0;
 
-interface Face {
+interface _Interface {
   function stare(uint a, uint b) external;
   function cry() external;
 }

test/integration/projects/libraries/migrations/1_initial_migration.js

@@ -0,0 +1,5 @@
+const Migrations = artifacts.require("Migrations");
+
+module.exports = function(deployer) {
+  deployer.deploy(Migrations);
+};

test/integration/projects/libraries/migrations/2_contracta.js

@@ -0,0 +1,8 @@
+const UsesPure = artifacts.require("UsesPure");
+const CLibrary = artifacts.require("CLibrary");
+
+module.exports = function(deployer) {
+  deployer.deploy(CLibrary);
+  deployer.link(CLibrary, UsesPure);
+  deployer.deploy(UsesPure);
+};

test/integration/projects/libraries/test/libraries.js

@@ -0,0 +1,64 @@
+const UsesPure = artifacts.require('UsesPure');
+
+contract('UsesPure', accounts => {
+  it('calls imported,  inherited pure/view functions within its own function', async () => {
+    const instance = await UsesPure.deployed();
+    await instance.usesThem();
+  });
+
+  it('calls a library method', async() => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.usesLibrary();
+    assert.equal(value.toNumber(), 1);
+  });
+
+  it('calls an imported, inherited pure function', async () => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.isPure(4, 5);
+    assert.equal(value.toNumber(), 20);
+  });
+
+  it('calls an imported, inherited view function', async () => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.isView();
+    assert.equal(value.toNumber(), 5);
+  });
+
+  it('overrides an imported, inherited abstract pure function', async () => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.bePure(4, 5);
+    assert.equal(value.toNumber(), 9);
+  });
+
+  it('overrides an imported, inherited abstract view function', async () => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.beView();
+    assert.equal(value.toNumber(), 99);
+  });
+
+  it('calls a pure method implemented in an inherited class', async() => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.inheritedPure(4, 5);
+    assert.equal(value.toNumber(), 9);
+  });
+
+  it('calls a view method implemented in an inherited class', async () => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.inheritedView();
+    assert.equal(value.toNumber(), 5);
+  });
+
+  it('calls a view method whose modifiers span lines', async () => {
+    const instance = await UsesPure.deployed();
+    const value = await instance.multiline(5, 7)
+    assert.equal(value.toNumber(), 99);
+  });
+
+  it('calls a method who signature is defined by an interface', async () => {
+    const instance = await UsesPure.deployed();
+    await instance.cry();
+  });
+
+
+
+});

test/integration/projects/libraries/truffle-config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  networks: {},
+  mocha: {},
+  compilers: {
+    solc: {}
+  }
+}

test/sources/js/totallyPure.js

@@ -1,58 +1,55 @@
-/* eslint-env node, mocha */
-/* global artifacts, contract, assert */
+const UsesPure = artifacts.require('UsesPure');
 
-const TotallyPure = artifacts.require('./TotallyPure.sol');
-
-contract('TotallyPure', accounts => {
+contract('UsesPure', accounts => {
   it('calls imported,  inherited pure/view functions within its own function', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     await instance.usesThem();
   });
 
   it('calls an imported, inherited pure function', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.isPure(4, 5);
     assert.equal(value.toNumber(), 20);
   });
 
   it('calls an imported, inherited view function', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.isView();
     assert.equal(value.toNumber(), 5);
   });
 
   it('overrides an imported, inherited abstract pure function', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.bePure(4, 5);
     assert.equal(value.toNumber(), 9);
   });
 
   it('overrides an imported, inherited abstract view function', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.beView();
     assert.equal(value.toNumber(), 99);
   });
 
   it('calls a pure method implemented in an inherited class', async() => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.inheritedPure(4, 5);
     assert.equal(value.toNumber(), 9);
   });
 
   it('calls a view method implemented in an inherited class', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.inheritedView();
     assert.equal(value.toNumber(), 5);
   });
 
   it('calls a view method whose modifiers span lines', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     const value = await instance.multiline(5, 7)
     assert.equal(value.toNumber(), 99);
   });
 
   it('calls a method who signature is defined by an interface', async () => {
-    const instance = await TotallyPure.deployed();
+    const instance = await UsesPure.deployed();
     await instance.cry();
   });
 

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

@@ -0,0 +1,8 @@
+pragma solidity ^0.5.0;
+
+contract Test {
+    function a() public {
+        uint x = 1;
+        x++;
+    }
+}

test/units/statements.js

@@ -147,6 +147,15 @@ describe('generic statements', () => {
     });
   });
 
+  it.skip('should cover a unary statement', async function(){
+    const contract = await util.bootstrapCoverage('statements/unary', provider, collector);
+    coverage.addContract(contract.instrumented, util.filePath);
+    await contract.instance.a();
+    const mapping = coverage.generate(contract.data, util.pathPrefix);
+
+    // TODO: obtain both statements in unary.sol
+  })
+
   it('should cover an empty bodied contract statement', async function() {
     const contract = await util.bootstrapCoverage('statements/empty-contract-body', provider, collector);
     coverage.addContract(contract.instrumented, util.filePath);

test/units/truffle/errors.js

@@ -23,12 +23,12 @@ describe('Truffle Plugin: error cases', function() {
     mock.loggerOutput.val = '';
     solcoverConfig = {};
     truffleConfig = mock.getDefaultTruffleConfig();
+    verify.cleanInitialState();
   })
 
   afterEach(() => mock.clean());
 
   it('project contains no contract sources folder', async function() {
-    verify.cleanInitialState();
     mock.installFullProject('no-sources');
 
     try {
@@ -50,9 +50,8 @@ describe('Truffle Plugin: error cases', function() {
   });
 
   it('.solcover.js has syntax error', async function(){
-    verify.cleanInitialState();
-
     mock.installFullProject('bad-solcoverjs');
+
     try {
       await plugin(truffleConfig);
       assert.fail()
@@ -67,7 +66,6 @@ describe('Truffle Plugin: error cases', function() {
   })
 
   it('.solcover.js has incorrectly formatted option', async function(){
-    verify.cleanInitialState();
     solcoverConfig.port = "Antwerpen";
 
     mock.install('Simple', 'simple.js', solcoverConfig);
@@ -84,7 +82,6 @@ describe('Truffle Plugin: error cases', function() {
   });
 
   it('lib module load failure', async function(){
-    verify.cleanInitialState();
     truffleConfig.usePluginTruffle = true;
     truffleConfig.forceLibFailure = true;
 
@@ -102,8 +99,6 @@ describe('Truffle Plugin: error cases', function() {
   });
 
   it('--network <target> is not declared in truffle-config.js', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.network = 'does-not-exist';
 
     mock.install('Simple', 'simple.js', solcoverConfig);
@@ -127,7 +122,6 @@ describe('Truffle Plugin: error cases', function() {
 
   // This case *does* throw an error, but it's uncatch-able;
   it('tries to launch with a port already in use', async function(){
-    verify.cleanInitialState();
     const server = ganache.server();
 
     truffleConfig.network = 'development';
@@ -149,11 +143,31 @@ describe('Truffle Plugin: error cases', function() {
     await pify(server.close)();
   });
 
+  it('uses an invalid istanbul reporter', async function() {
+    solcoverConfig = {
+      silent: process.env.SILENT ? true : false,
+      istanbulReporter: ['does-not-exist']
+    };
+
+    mock.install('Simple', 'simple.js', solcoverConfig);
+
+    try {
+      await plugin(truffleConfig);
+      assert.fail();
+    } catch(err){
+      assert(
+        err.message.includes('does-not-exist') &&
+        err.message.includes('coverage reports could not be generated'),
+        `Should error on invalid reporter: ${err.message}`
+      )
+    }
+
+  });
+
   // Truffle test contains syntax error
   it('truffle crashes', async function() {
-    verify.cleanInitialState();
-
     mock.install('Simple', 'truffle-crash.js', solcoverConfig);
+
     try {
       await plugin(truffleConfig);
       assert.fail()
@@ -164,8 +178,6 @@ describe('Truffle Plugin: error cases', function() {
 
   // Solidity syntax errors
   it('compilation failure', async function(){
-    verify.cleanInitialState();
-
     mock.install('SimpleError', 'simple.js', solcoverConfig);
 
     try {
@@ -179,8 +191,6 @@ describe('Truffle Plugin: error cases', function() {
   });
 
   it('instrumentation failure', async function(){
-    verify.cleanInitialState();
-
     mock.install('Unparseable', 'simple.js', solcoverConfig);
 
     try {

test/units/truffle/flags.js

@@ -21,13 +21,12 @@ describe('Truffle Plugin: command line options', function() {
     mock.loggerOutput.val = '';
     solcoverConfig = {};
     truffleConfig = mock.getDefaultTruffleConfig();
+    verify.cleanInitialState();
   })
 
   afterEach(() => mock.clean());
 
   it('--file test/<fileName>', async function() {
-    verify.cleanInitialState();
-
     truffleConfig.file = path.join(
       truffleConfig.working_directory,
       'test/specific_a.js'
@@ -55,8 +54,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--file test/<glob*>', async function() {
-    verify.cleanInitialState();
-
     truffleConfig.file = path.join(
       truffleConfig.working_directory,
       'test/globby*'
@@ -84,8 +81,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--file test/gl{o,b}*.js', async function() {
-    verify.cleanInitialState();
-
     truffleConfig.file = path.join(
       truffleConfig.working_directory,
       'test/gl{o,b}*.js'
@@ -113,8 +108,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--config ../.solcover.js', async function() {
-    verify.cleanInitialState();
-
     solcoverConfig = {
       silent: process.env.SILENT ? true : false,
       istanbulReporter: ['json-summary', 'text']
@@ -143,8 +136,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--help', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.help = "true";
     truffleConfig.logger = mock.testLogger;
 
@@ -158,8 +149,6 @@ describe('Truffle Plugin: command line options', function() {
   })
 
   it('--version', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.version = "true";
     truffleConfig.logger = mock.testLogger;
 
@@ -184,8 +173,6 @@ describe('Truffle Plugin: command line options', function() {
   })
 
   it('--useGlobalTruffle', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.useGlobalTruffle = true;
     truffleConfig.logger = mock.testLogger;
 
@@ -199,8 +186,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--usePluginTruffle', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.usePluginTruffle = true;
     truffleConfig.logger = mock.testLogger;
 
@@ -214,8 +199,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--usePluginTruffle', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.usePluginTruffle = true;
     truffleConfig.logger = mock.testLogger;
 
@@ -229,8 +212,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--network (network_id mismatch in configs)', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.logger = mock.testLogger;
 
     solcoverConfig = { providerOptions: { network_id: 5 }}
@@ -248,8 +229,6 @@ describe('Truffle Plugin: command line options', function() {
   });
 
   it('--network (truffle config missing port)', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.logger = mock.testLogger;
 
     truffleConfig.network = 'development';
@@ -267,12 +246,9 @@ describe('Truffle Plugin: command line options', function() {
       mock.loggerOutput.val.includes("8555"),
       `Should have used default coverage port 8555: ${mock.loggerOutput.val}`
     );
-
   });
 
   it('--network (declared port mismatches)', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.logger = mock.testLogger;
 
     truffleConfig.network = 'development'; // 8545
@@ -290,7 +266,6 @@ describe('Truffle Plugin: command line options', function() {
       mock.loggerOutput.val.includes("8545"),
       `Should have used default coverage port 8545: ${mock.loggerOutput.val}`
     );
-
   });
 });
 

test/units/truffle/standard.js

@@ -21,13 +21,12 @@ describe('Truffle Plugin: standard use cases', function() {
     mock.loggerOutput.val = '';
     solcoverConfig = {};
     truffleConfig = mock.getDefaultTruffleConfig();
+    verify.cleanInitialState();
   })
 
   afterEach(() => mock.clean());
 
   it('simple contract', async function(){
-    verify.cleanInitialState();
-
     mock.install('Simple', 'simple.js', solcoverConfig);
     await plugin(truffleConfig);
 
@@ -36,21 +35,18 @@ describe('Truffle Plugin: standard use cases', function() {
     const output = mock.getOutput(truffleConfig);
     const path = Object.keys(output)[0];
 
-    assert(output[path].fnMap['1'].name === 'test', 'coverage.json missing "test"');
-    assert(output[path].fnMap['2'].name === 'getX', 'coverage.json missing "getX"');
-  });
-
-  // Truffle test asserts balance is 777 ether
-  it('config with providerOptions', async function() {
-    solcoverConfig.providerOptions = { default_balance_ether: 777 }
+    assert(
+      output[path].fnMap['1'].name === 'test',
+      'coverage.json missing "test"'
+    );
 
-    mock.install('Simple', 'testrpc-options.js', solcoverConfig);
-    await plugin(truffleConfig);
+    assert(
+      output[path].fnMap['2'].name === 'getX',
+      'coverage.json missing "getX"'
+    );
   });
 
-  it('large contract with many unbracketed statements (time check)', async function() {
-    verify.cleanInitialState();
-
+  it('with many unbracketed statements (time check)', async function() {
     truffleConfig.compilers.solc.version = "0.4.24";
 
     mock.install('Oraclize', 'oraclize.js', solcoverConfig, truffleConfig, true);
@@ -59,8 +55,7 @@ describe('Truffle Plugin: standard use cases', function() {
 
   // This project has three contract suites and uses .deployed() instances which
   // depend on truffle's migratons and the inter-test evm_revert / evm_snapshot mechanism.
-  it('project evm_reverts repeatedly', async function() {
-    verify.cleanInitialState();
+  it('with multiple migrations (evm_reverts repeatedly)', async function() {
     mock.installFullProject('multiple-migrations');
     await plugin(truffleConfig);
 
@@ -82,84 +77,17 @@ describe('Truffle Plugin: standard use cases', function() {
     verify.lineCoverage(expected);
   });
 
-  // This project has [ @skipForCoverage ] tags in the test descriptions
-  // at selected 'contract' and 'it' blocks.
-  it('uses solcoverjs mocha options', async function() {
-    verify.cleanInitialState();
-
-    solcoverConfig.mocha = {
-      grep: '@skipForCoverage',
-      invert: true,
-    };
-
-    solcoverConfig.silent = process.env.SILENT ? true : false,
-    solcoverConfig.istanbulReporter = ['json-summary', 'text']
-
-    mock.installFullProject('multiple-migrations', solcoverConfig);
-    await plugin(truffleConfig);
-
-    const expected = [
-      {
-        file: mock.pathToContract(truffleConfig, 'ContractA.sol'),
-        pct: 0
-      },
-      {
-        file: mock.pathToContract(truffleConfig, 'ContractB.sol'),
-        pct: 0,
-      },
-      {
-        file: mock.pathToContract(truffleConfig, 'ContractC.sol'),
-        pct: 100,
-      },
-    ];
-
-    verify.lineCoverage(expected);
-  });
-
-  it('skips a folder', async function() {
-    verify.cleanInitialState();
-    mock.installFullProject('skipping');
-    await plugin(truffleConfig);
-
-    const expected = [{
-     file: mock.pathToContract(truffleConfig, 'ContractA.sol'),
-     pct: 100
-    }];
-
-    const missing = [{
-     file: mock.pathToContract(truffleConfig, 'skipped-folder/ContractB.sol'),
-    }];
-
-    verify.lineCoverage(expected);
-    verify.coverageMissing(missing);
-  });
-
-  it('uses "onServerReady", "onTestsComplete", "onIstanbulComplete"', async function() {
-    verify.cleanInitialState();
-
-    truffleConfig.logger = mock.testLogger;
-    mock.installFullProject('test-files');
-
+  it('with relative path solidity imports', async function() {
+    mock.installFullProject('import-paths');
     await plugin(truffleConfig);
-
-    assert(
-      mock.loggerOutput.val.includes('running onServerReady')     &&
-      mock.loggerOutput.val.includes('running onTestsComplete')   &&
-      mock.loggerOutput.val.includes('running onIstanbulComplete'),
-
-      `Should run "on" hooks : ${mock.loggerOutput.val}`
-    );
   });
 
-  it('project with relative path solidity imports', async function() {
-    verify.cleanInitialState();
-    mock.installFullProject('import-paths');
+  it('uses libraries', async function() {
+    mock.installFullProject('libraries');
     await plugin(truffleConfig);
   });
 
-  it('project contains native solidity tests', async function(){
-    verify.cleanInitialState();
-
+  it('uses native solidity tests', async function(){
     mock.install('Simple', 'TestSimple.sol', solcoverConfig);
 
     truffleConfig.logger = mock.testLogger;
@@ -171,63 +99,58 @@ describe('Truffle Plugin: standard use cases', function() {
     );
   });
 
-  it('contract only uses ".call"', async function(){
-    verify.cleanInitialState();
+  it('uses inheritance', async function() {
+    mock.installDouble(
+      ['Proxy', 'Owned'],
+      'inheritance.js',
+      solcoverConfig
+    );
 
-    mock.install('OnlyCall', 'only-call.js', solcoverConfig);
     await plugin(truffleConfig);
 
     verify.coverageGenerated(truffleConfig);
 
     const output = mock.getOutput(truffleConfig);
-    const path = Object.keys(output)[0];
-    assert(output[path].fnMap['1'].name === 'addTwo', 'cov should map "addTwo"');
-  });
-
-  it('contract sends / transfers to instrumented fallback', async function(){
-    verify.cleanInitialState();
-
-    mock.install('Wallet', 'wallet.js', solcoverConfig);
-    await plugin(truffleConfig);
+    const ownedPath = Object.keys(output)[0];
+    const proxyPath = Object.keys(output)[1];
 
-    verify.coverageGenerated(truffleConfig);
+    assert(
+      output[ownedPath].fnMap['1'].name === 'constructor',
+      '"constructor" not covered'
+    );
 
-    const output = mock.getOutput(truffleConfig);
-    const path = Object.keys(output)[0];
-    assert(output[path].fnMap['1'].name === 'transferPayment', 'cov should map "transferPayment"');
+    assert(
+      output[proxyPath].fnMap['1'].name === 'isOwner',
+      '"isOwner" not covered'
+    );
   });
 
-  it('contracts are skipped', async function() {
-    verify.cleanInitialState();
-
-    solcoverConfig.skipFiles = ['Owned.sol'];
-
-    mock.installDouble(['Proxy', 'Owned'], 'inheritance.js', solcoverConfig);
+  it('only uses ".call"', async function(){
+    mock.install('OnlyCall', 'only-call.js', solcoverConfig);
     await plugin(truffleConfig);
 
     verify.coverageGenerated(truffleConfig);
 
     const output = mock.getOutput(truffleConfig);
-    const firstKey = Object.keys(output)[0];
-
-    assert(Object.keys(output).length === 1, 'Wrong # of contracts covered');
-    assert(firstKey.substr(firstKey.length - 9) === 'Proxy.sol', 'Wrong contract covered');
+    const path = Object.keys(output)[0];
+    assert(
+      output[path].fnMap['1'].name === 'addTwo',
+      'cov should map "addTwo"'
+    );
   });
 
-  it('contract uses inheritance', async function() {
-    verify.cleanInitialState();
-
-    mock.installDouble(['Proxy', 'Owned'], 'inheritance.js', solcoverConfig);
+  it('sends / transfers to instrumented fallback', async function(){
+    mock.install('Wallet', 'wallet.js', solcoverConfig);
     await plugin(truffleConfig);
 
     verify.coverageGenerated(truffleConfig);
 
     const output = mock.getOutput(truffleConfig);
-    const ownedPath = Object.keys(output)[0];
-    const proxyPath = Object.keys(output)[1];
-
-    assert(output[ownedPath].fnMap['1'].name === 'constructor', '"constructor" not covered');
-    assert(output[proxyPath].fnMap['1'].name === 'isOwner', '"isOwner" not covered');
+    const path = Object.keys(output)[0];
+    assert(
+      output[path].fnMap['1'].name === 'transferPayment',
+      'cov should map "transferPayment"'
+    );
   });
 
   // Truffle test asserts deployment cost is greater than 20,000,000 gas
@@ -237,9 +160,7 @@ describe('Truffle Plugin: standard use cases', function() {
   });
 
   // Simple.sol with a failing assertion in a truffle test
-  it('truffle tests failing', async function() {
-    verify.cleanInitialState();
-
+  it('unit tests failing', async function() {
     mock.install('Simple', 'truffle-test-fail.js', solcoverConfig);
 
     try {
@@ -259,11 +180,8 @@ describe('Truffle Plugin: standard use cases', function() {
   });
 
   it('uses the fallback server', async function(){
-    verify.cleanInitialState();
-
     truffleConfig.logger = mock.testLogger;
-
-    solcoverConfig = { forceBackupServer: true }
+    solcoverConfig.forceBackupServer = true;
 
     mock.install('Simple', 'simple.js', solcoverConfig);
     await plugin(truffleConfig);
@@ -272,6 +190,104 @@ describe('Truffle Plugin: standard use cases', function() {
       mock.loggerOutput.val.includes("Using ganache-core-sc"),
       `Should notify about backup server module: ${mock.loggerOutput.val}`
     );
+  });
+
+  // This project has [ @skipForCoverage ] tags in the test descriptions
+  // at selected 'contract' and 'it' blocks.
+  it('config: mocha options', async function() {
+    solcoverConfig.mocha = {
+      grep: '@skipForCoverage',
+      invert: true,
+    };
+
+    solcoverConfig.silent = process.env.SILENT ? true : false,
+    solcoverConfig.istanbulReporter = ['json-summary', 'text']
+
+    mock.installFullProject('multiple-migrations', solcoverConfig);
+    await plugin(truffleConfig);
+
+    const expected = [
+      {
+        file: mock.pathToContract(truffleConfig, 'ContractA.sol'),
+        pct: 0
+      },
+      {
+        file: mock.pathToContract(truffleConfig, 'ContractB.sol'),
+        pct: 0,
+      },
+      {
+        file: mock.pathToContract(truffleConfig, 'ContractC.sol'),
+        pct: 100,
+      },
+    ];
+
+    verify.lineCoverage(expected);
+  });
+
+  // Truffle test asserts balance is 777 ether
+  it('config: providerOptions', async function() {
+    solcoverConfig.providerOptions = { default_balance_ether: 777 }
+
+    mock.install('Simple', 'testrpc-options.js', solcoverConfig);
+    await plugin(truffleConfig);
+  });
+
+  it('config: skipped file', async function() {
+    solcoverConfig.skipFiles = ['Owned.sol'];
+
+    mock.installDouble(
+      ['Proxy', 'Owned'],
+      'inheritance.js',
+      solcoverConfig
+    );
 
+    await plugin(truffleConfig);
+
+    verify.coverageGenerated(truffleConfig);
+
+    const output = mock.getOutput(truffleConfig);
+    const firstKey = Object.keys(output)[0];
+
+    assert(
+      Object.keys(output).length === 1,
+      'Wrong # of contracts covered'
+    );
+
+    assert(
+      firstKey.substr(firstKey.length - 9) === 'Proxy.sol',
+      'Wrong contract covered'
+    );
+  });
+
+  it('config: skipped folder', async function() {
+    mock.installFullProject('skipping');
+    await plugin(truffleConfig);
+
+    const expected = [{
+     file: mock.pathToContract(truffleConfig, 'ContractA.sol'),
+     pct: 100
+    }];
+
+    const missing = [{
+     file: mock.pathToContract(truffleConfig, 'skipped-folder/ContractB.sol'),
+    }];
+
+    verify.lineCoverage(expected);
+    verify.coverageMissing(missing);
+  });
+
+  it('config: "onServerReady", "onTestsComplete", ...', async function() {
+    truffleConfig.logger = mock.testLogger;
+    mock.installFullProject('test-files');
+
+    await plugin(truffleConfig);
+
+    assert(
+      mock.loggerOutput.val.includes('running onServerReady')     &&
+      mock.loggerOutput.val.includes('running onTestsComplete')   &&
+      mock.loggerOutput.val.includes('running onIstanbulComplete'),
+
+      `Should run "on" hooks : ${mock.loggerOutput.val}`
+    );
   });
 })