Add tests for dev-utils package

packages/dev-utils/package.json

@@ -7,8 +7,11 @@
     "scripts": {
         "build:watch": "tsc -w",
         "build": "tsc",
+        "test": "run-s clean build run_mocha",
+        "test:circleci": "yarn test",
+        "run_mocha": "mocha lib/test/**/*_test.js --bail --exit",
         "clean": "shx rm -rf lib",
-        "lint": "tslint --project . 'src/**/*.ts'"
+        "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'"
     },
     "license": "Apache-2.0",
     "repository": {
@@ -20,9 +23,14 @@
     },
     "homepage": "https://github.com/0xProject/0x.js/packages/dev-utils/README.md",
     "devDependencies": {
+        "@types/mocha": "^2.2.42",
         "@0xproject/tslint-config": "^0.4.9",
         "@0xproject/types": "^0.2.2",
+        "@0xproject/web3-wrapper": "^0.1.13",
         "@types/lodash": "^4.14.86",
+        "chai": "^4.0.1",
+        "chai-typescript-typings": "^0.0.3",
+        "mocha": "^4.0.1",
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "tslint": "5.8.0",

packages/dev-utils/test/blockchain_lifecycle_test.ts

@@ -0,0 +1,25 @@
+import { BlockParamLiteral } from '@0xproject/types';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as chai from 'chai';
+import 'mocha';
+
+import { BlockchainLifecycle, RPC, web3Factory } from '../src';
+
+const expect = chai.expect;
+
+describe('BlockchainLifecycle tests', () => {
+    const web3 = web3Factory.create();
+    const web3Wrapper = new Web3Wrapper(web3.currentProvider);
+    const rpc = new RPC();
+    const blockchainLifecycle = new BlockchainLifecycle();
+    describe('#startAsync/revertAsync', () => {
+        it('reverts changes in between', async () => {
+            const blockNumberBefore = await web3Wrapper.getBlockNumberAsync();
+            await blockchainLifecycle.startAsync();
+            await rpc.mineBlockAsync();
+            await blockchainLifecycle.revertAsync();
+            const blockNumberAfter = await web3Wrapper.getBlockNumberAsync();
+            expect(blockNumberAfter).to.be.equal(blockNumberBefore);
+        });
+    });
+});

packages/dev-utils/test/rpc_test.ts

@@ -0,0 +1,42 @@
+import { BlockParamLiteral } from '@0xproject/types';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as chai from 'chai';
+import 'mocha';
+
+import { RPC, web3Factory } from '../src';
+
+const expect = chai.expect;
+
+describe('RPC tests', () => {
+    const web3 = web3Factory.create();
+    const web3Wrapper = new Web3Wrapper(web3.currentProvider);
+    const rpc = new RPC();
+    describe('#mineBlockAsync', () => {
+        it('increases block number when called', async () => {
+            const blockNumberBefore = await web3Wrapper.getBlockNumberAsync();
+            await rpc.mineBlockAsync();
+            const blockNumberAfter = await web3Wrapper.getBlockNumberAsync();
+            expect(blockNumberAfter).to.be.equal(blockNumberBefore + 1);
+        });
+    });
+    describe('#increaseTimeAsync', () => {
+        it('increases time when called', async () => {
+            const TIME_DELTA = 1000;
+            const blockTimestamtBefore = await web3Wrapper.getBlockTimestampAsync(BlockParamLiteral.Latest);
+            await rpc.increaseTimeAsync(TIME_DELTA);
+            await rpc.mineBlockAsync();
+            const blockTimestamtAfter = await web3Wrapper.getBlockTimestampAsync(BlockParamLiteral.Latest);
+            expect(blockTimestamtAfter).to.be.at.least(blockTimestamtBefore + TIME_DELTA);
+        });
+    });
+    describe('#takeSnapshotAsync/revertSnapshotAsync', () => {
+        it('reverts changes in between', async () => {
+            const blockNumberBefore = await web3Wrapper.getBlockNumberAsync();
+            const snapshotId = await rpc.takeSnapshotAsync();
+            await rpc.mineBlockAsync();
+            await rpc.revertSnapshotAsync(snapshotId);
+            const blockNumberAfter = await web3Wrapper.getBlockNumberAsync();
+            expect(blockNumberAfter).to.be.equal(blockNumberBefore);
+        });
+    });
+});

packages/dev-utils/tsconfig.json

@@ -7,6 +7,7 @@
         "./src/**/*",
         "./test/**/*",
         "../../node_modules/types-bn/index.d.ts",
+        "../../node_modules/chai-typescript-typings/index.d.ts",
         "../../node_modules/web3-typescript-typings/index.d.ts",
         "../../node_modules/types-ethereumjs-util/index.d.ts"
     ]