Remove unused variables and other small fixes

2 files changed, 7 insertions, 6 deletions

diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index ad7cbf476..2495795dc 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -19,7 +19,7 @@
         "rebuild_and_test": "run-s build test",
         "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
         "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
-        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s run_mocha",
+        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
         "run_mocha": "mocha --require source-map-support/register 'lib/test/**/*.js' --timeout 100000 --bail --exit",
         "compile": "sol-compiler",
         "clean": "shx rm -rf lib src/generated_contract_wrappers",
diff --git a/packages/contracts/src/utils/web3_wrapper.ts b/packages/contracts/src/utils/web3_wrapper.ts
index f51ad435b..772e4c613 100644
--- a/packages/contracts/src/utils/web3_wrapper.ts
+++ b/packages/contracts/src/utils/web3_wrapper.ts
@@ -7,6 +7,8 @@ import { coverage } from './coverage';
 import { profiler } from './profiler';
 import { revertTrace } from './revert_trace';
 
+import * as _ from 'lodash';
+
 enum ProviderType {
     Ganache = 'ganache',
     Geth = 'geth',
@@ -50,11 +52,10 @@ export const provider = web3Factory.getRpcProvider(providerConfigs);
 const isCoverageEnabled = env.parseBoolean(EnvVars.SolidityCoverage);
 const isProfilerEnabled = env.parseBoolean(EnvVars.SolidityProfiler);
 const isRevertTraceEnabled = env.parseBoolean(EnvVars.SolidityRevertTrace);
-// TODO(albrow): Include revertTrace checks in the warnings below.
-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.`,
-    );
+const enabledSubproviderCount = _.filter([isCoverageEnabled, isProfilerEnabled, isRevertTraceEnabled], _.identity)
+    .length;
+if (enabledSubproviderCount > 1) {
+    throw new Error(`Only one of coverage, profiler, and revert trace subproviders can be enabled at a time`);
 }
 if (isCoverageEnabled) {
     const coverageSubprovider = coverage.getCoverageSubproviderSingleton();