Remove web3Factory.create and remove dev-tools dependency on sol-cov

packages/contracts/package.json

@@ -44,6 +44,8 @@
     "devDependencies": {
         "@0xproject/abi-gen": "^0.2.13",
         "@0xproject/dev-utils": "^0.4.1",
+        "@0xproject/subproviders": "^0.10.1",
+        "@0xproject/sol-cov": "^0.0.10",
         "@0xproject/tslint-config": "^0.4.17",
         "@types/lodash": "4.14.104",
         "@types/node": "^8.0.53",

packages/contracts/src/utils/web3_wrapper.ts

@@ -1,12 +1,18 @@
-import { devConstants, web3Factory } from '@0xproject/dev-utils';
+import { devConstants, env, EnvVars, web3Factory } from '@0xproject/dev-utils';
+import { prependSubprovider } from '@0xproject/subproviders';
 import { Provider } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 
+import { coverage } from './coverage';
+
 export const txDefaults = {
     from: devConstants.TESTRPC_FIRST_ADDRESS,
     gas: devConstants.GAS_ESTIMATE,
 };
 const providerConfigs = { shouldUseInProcessGanache: true };
-export const web3 = web3Factory.create(providerConfigs);
-export const provider = web3.currentProvider;
+export const provider = web3Factory.getRpcProvider(providerConfigs);
+const isCoverageEnabled = env.parseBoolean(EnvVars.SolidityCoverage);
+if (isCoverageEnabled) {
+    prependSubprovider(provider, coverage.getCoverageSubproviderSingleton());
+}
 export const web3Wrapper = new Web3Wrapper(provider);

packages/contracts/test/global_hooks.ts

@@ -1,4 +1,6 @@
-import { coverage, env, EnvVars } from '@0xproject/dev-utils';
+import { env, EnvVars } from '@0xproject/dev-utils';
+
+import { coverage } from './utils/coverage';
 
 after('generate coverage report', async () => {
     if (env.parseBoolean(EnvVars.SolidityCoverage)) {

packages/contracts/test/utils/coverage.ts

@@ -0,0 +1,21 @@
+import { devConstants } from '@0xproject/dev-utils';
+import { CoverageSubprovider, ZeroExArtifactAdapter } from '@0xproject/sol-cov';
+import * as fs from 'fs';
+import * as _ from 'lodash';
+
+let coverageSubprovider: CoverageSubprovider;
+
+export const coverage = {
+    getCoverageSubproviderSingleton(): CoverageSubprovider {
+        if (_.isUndefined(coverageSubprovider)) {
+            coverageSubprovider = coverage._getCoverageSubprovider();
+        }
+        return coverageSubprovider;
+    },
+    _getCoverageSubprovider(): CoverageSubprovider {
+        const defaultFromAddress = devConstants.TESTRPC_FIRST_ADDRESS;
+        const config = JSON.parse(fs.readFileSync('compiler.json').toString());
+        const zeroExArtifactsAdapter = new ZeroExArtifactAdapter(config.artifactsDir, config.contractsDir);
+        return new CoverageSubprovider(zeroExArtifactsAdapter, defaultFromAddress);
+    },
+};