2 files changed, 85 insertions, 11 deletions

diff --git a/packages/metacoin/test/utils/profiler.ts b/packages/metacoin/test/utils/profiler.ts
new file mode 100644
index 000000000..701337451
--- /dev/null
+++ b/packages/metacoin/test/utils/profiler.ts
@@ -0,0 +1,27 @@
+import { devConstants } from '@0xproject/dev-utils';
+import { ProfilerSubprovider, SolCompilerArtifactAdapter } from '@0xproject/sol-cov';
+import * as _ from 'lodash';
+
+import { config } from './config';
+
+let profilerSubprovider: ProfilerSubprovider;
+
+export const profiler = {
+    start(): void {
+        profiler.getProfilerSubproviderSingleton().start();
+    },
+    stop(): void {
+        profiler.getProfilerSubproviderSingleton().stop();
+    },
+    getProfilerSubproviderSingleton(): ProfilerSubprovider {
+        if (_.isUndefined(profilerSubprovider)) {
+            profilerSubprovider = profiler._getProfilerSubprovider();
+        }
+        return profilerSubprovider;
+    },
+    _getProfilerSubprovider(): ProfilerSubprovider {
+        const defaultFromAddress = devConstants.TESTRPC_FIRST_ADDRESS;
+        const zeroExArtifactsAdapter = new SolCompilerArtifactAdapter(config.artifactsDir, config.contractsDir);
+        return new ProfilerSubprovider(zeroExArtifactsAdapter, defaultFromAddress);
+    },
+};
diff --git a/packages/metacoin/test/utils/web3_wrapper.ts b/packages/metacoin/test/utils/web3_wrapper.ts
index 273cdf961..d3655cb6a 100644
--- a/packages/metacoin/test/utils/web3_wrapper.ts
+++ b/packages/metacoin/test/utils/web3_wrapper.ts
@@ -1,31 +1,78 @@
 import { env, EnvVars } from '@0xproject/dev-utils';
 import { GanacheSubprovider, prependSubprovider } from '@0xproject/subproviders';
+import { errorUtils, logUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as fs from 'fs';
 import ProviderEngine = require('web3-provider-engine');
+import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
 import { config } from './config';
 import { coverage } from './coverage';
+import { profiler } from './profiler';
+
+enum ProviderType {
+    Ganache = 'ganache',
+    Geth = 'geth',
+}
+
+let testProvider: ProviderType;
+switch (process.env.TEST_PROVIDER) {
+    case undefined:
+        testProvider = ProviderType.Ganache;
+        break;
+    case 'ganache':
+        testProvider = ProviderType.Ganache;
+        break;
+    case 'geth':
+        testProvider = ProviderType.Geth;
+        break;
+    default:
+        throw errorUtils.spawnSwitchErr('TEST_PROVIDER', process.env.TEST_PROVIDER);
+}
 
 export const provider = new ProviderEngine();
-provider.addProvider(
-    new GanacheSubprovider({
-        logger: {
-            log: (arg: any) => {
-                fs.appendFileSync(config.ganacheLogFile, `${arg}\n`);
+if (testProvider === ProviderType.Ganache) {
+    provider.addProvider(
+        new GanacheSubprovider({
+            logger: {
+                log: (arg: any) => {
+                    fs.appendFileSync(config.ganacheLogFile, `${arg}\n`);
+                },
             },
-        },
-        verbose: env.parseBoolean(EnvVars.SolidityCoverage),
-        networkId: config.networkId,
-        mnemonic: config.mnemonic,
-    }),
-);
+            verbose: env.parseBoolean(EnvVars.SolidityCoverage),
+            networkId: config.networkId,
+            mnemonic: config.mnemonic,
+        }),
+    );
+} else {
+    provider.addProvider(new RpcSubprovider({ rpcUrl: 'http://localhost:8501' }));
+}
 provider.start();
 
 const isCoverageEnabled = env.parseBoolean(EnvVars.SolidityCoverage);
+const isProfilerEnabled = env.parseBoolean(EnvVars.SolidityProfiler);
+if (isCoverageEnabled && isProfilerEnabled) {
+    throw new Error(
+        `Unfortunately for now you can't enable both coverage and profiler at the same time. They both use coverage.json file and there is no way to configure that.`,
+    );
+}
 if (isCoverageEnabled) {
     const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
     prependSubprovider(provider, coverageSubprovider);
 }
+if (isProfilerEnabled) {
+    if (testProvider === ProviderType.Ganache) {
+        logUtils.warn(
+            "Gas costs in Ganache traces are incorrect and we don't recommend using it for profiling. Please switch to Geth. Check README for more details",
+        );
+        process.exit(1);
+    }
+    const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
+    logUtils.log(
+        "By default profilerSubprovider is stopped so that you don't get noise from setup code. Don't forget to start it before the code you want to profile and stop it afterwards",
+    );
+    profilerSubprovider.stop();
+    prependSubprovider(provider, profilerSubprovider);
+}
 
 export const web3Wrapper = new Web3Wrapper(provider);