Add a check for compiler output

packages/0x.js/test/global_hooks.ts

@@ -13,6 +13,6 @@ before('migrate contracts', async function() {
         gas: devConstants.GAS_ESTIMATE,
         from: devConstants.TESTRPC_FIRST_ADDRESS,
     };
-    const artifactsDir = `../migrations/artifacts/${constants.ARTIFACTS_VERSION}`;
+    const artifactsDir = `../migrations/artifacts/1.0.0`;
     await runMigrationsAsync(provider, artifactsDir, defaults);
 });

packages/0x.js/test/utils/constants.ts

@@ -6,5 +6,4 @@ export const constants = {
     KOVAN_RPC_URL: 'https://kovan.infura.io/',
     ROPSTEN_RPC_URL: 'https://ropsten.infura.io/',
     ZRX_DECIMALS: 18,
-    ARTIFACTS_VERSION: '1.0.0',
 };

packages/contract_templates/contract.handlebars

@@ -46,6 +46,9 @@ export class {{contractName}}Contract extends BaseContract {
         defaults: Partial<TxData>,
         {{> typed_params inputs=ctor.inputs}}
     ): Promise<{{contractName}}Contract> {
+        if (_.isUndefined(artifact.compilerOutput)) {
+            throw new Error('Compiler output not found in the artifact file');
+        }
         const bytecode = artifact.compilerOutput.evm.bytecode.object;
         const abi = artifact.compilerOutput.abi;
         return {{contractName}}Contract.deployAsync(bytecode, abi, provider, defaults, {{> params inputs=ctor.inputs}});