Add a test to keep artifact sizes down

packages/contract-artifacts/package.json

@@ -12,6 +12,8 @@
     "scripts": {
         "build": "yarn tsc -b",
         "build:ci": "yarn build",
+        "test": "yarn run_mocha",
+        "run_mocha": "mocha --require source-map-support/register --require make-promises-safe lib/test/**/*_test.js --bail --exit",
         "clean": "shx rm -rf lib"
     },
     "repository": {
@@ -25,7 +27,12 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/contract-artifacts/README.md",
     "devDependencies": {
         "shx": "^0.2.2",
-        "typescript": "3.0.1"
+        "typescript": "3.0.1",
+        "chai": "^4.0.1",
+        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
+        "mocha": "^4.1.0",
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"

packages/contract-artifacts/test/contract_artifacts_test.ts

@@ -0,0 +1,35 @@
+import * as chai from 'chai';
+import * as dirtyChai from 'dirty-chai';
+import { get } from 'lodash';
+import 'mocha';
+
+import * as artifacts from '../src/index';
+
+chai.use(dirtyChai);
+
+const expect = chai.expect;
+
+describe('Contract Artifacts', () => {
+    const forbiddenProperties = [
+        'compilerOutput.evm.bytecode.sourceMap',
+        'compilerOutput.evm.bytecode.opcodes',
+        'sourceCodes',
+        'sources',
+        'compiler',
+    ];
+    it('should not include forbidden attributes', () => {
+        const forbiddenPropertiesByArtifact: { [name: string]: string[] } = {};
+        for (const [artifactName, artifact] of Object.entries(artifacts)) {
+            for (const forbiddenProperty of forbiddenProperties) {
+                const rejectedValue = get(artifact, forbiddenProperty);
+                if (rejectedValue) {
+                    const previousForbidden = forbiddenPropertiesByArtifact[artifactName];
+                    forbiddenPropertiesByArtifact[artifactName] = previousForbidden
+                        ? [...previousForbidden, forbiddenProperty]
+                        : [forbiddenProperty];
+                }
+            }
+        }
+        expect(forbiddenPropertiesByArtifact).to.be.eq({});
+    });
+});

packages/contract-artifacts/tsconfig.json

@@ -5,7 +5,7 @@
         "rootDir": ".",
         "resolveJsonModule": true
     },
-    "include": ["./src/**/*"],
+    "include": ["./src/**/*", "./test/**/*"],
     "files": [
         "./artifacts/AssetProxyOwner.json",
         "./artifacts/DutchAuction.json",