follow chai_setup pattern

packages/sol-compiler/package.json

@@ -61,6 +61,7 @@
         "@types/semver": "^5.5.0",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^2.0.2",
         "copyfiles": "^1.2.0",
         "dirty-chai": "^2.0.1",
         "make-promises-safe": "^1.1.0",

packages/sol-compiler/test/compiler_test.ts

@@ -1,7 +1,6 @@
 import { join } from 'path';
 
 import * as chai from 'chai';
-import * as chaiAsPromised from 'chai-as-promised';
 import 'mocha';
 
 import { Compiler } from '../src/compiler';
@@ -9,9 +8,10 @@ import { fsWrapper } from '../src/utils/fs_wrapper';
 import { CompilerOptions, ContractArtifact } from '../src/utils/types';
 
 import { exchange_binary } from './fixtures/exchange_bin';
+import { chaiSetup } from './util/chai_setup';
 import { constants } from './util/constants';
 
-chai.use(chaiAsPromised);
+chaiSetup.configure();
 const expect = chai.expect;
 
 describe('#Compiler', function(): void {

packages/sol-compiler/test/util/chai_setup.ts

@@ -0,0 +1,13 @@
+import * as chai from 'chai';
+import chaiAsPromised = require('chai-as-promised');
+import ChaiBigNumber = require('chai-bignumber');
+import * as dirtyChai from 'dirty-chai';
+
+export const chaiSetup = {
+    configure(): void {
+        chai.config.includeStack = true;
+        chai.use(ChaiBigNumber());
+        chai.use(dirtyChai);
+        chai.use(chaiAsPromised);
+    },
+};