Merge branch 'development' into convertScriptsToTs

* development: (71 commits)
  Transform input data before encoding for callAsync and getABIEncodedTransactionData
  Update coverage badge to show development coverage
  Configure post build hook
  Notify coveralls after all tasks have finished
  Address feedback
  Revert "Report all coverage reports together"
  Separate published packages and typescript typings on README
  Report all coverage reports together
  Add other statement types
  Properly and consistently parse ENV vars
  Add forgotten file
  Start using solidity-parser-antlr
  Fix the default always overriding to address
  Submit a TD PR
  Add an explanatory comment for making ranges unique
  Fix a typo in handling env variables
  Introduce TESTRPC_FIRST_ADDRESS
  Make BlockchainLifecycle accept only web3Wrapper
  Fix comments
  Fix deployer CHANGELOG
  ...

# Conflicts:
#	README.md
#	packages/deployer/package.json
#	packages/subproviders/src/globals.d.ts
#	yarn.lock

2 files changed, 20 insertions, 2 deletions

diff --git a/packages/web3-wrapper/CHANGELOG.md b/packages/web3-wrapper/CHANGELOG.md
index 6dabc7eb4..2b2fc7540 100644
--- a/packages/web3-wrapper/CHANGELOG.md
+++ b/packages/web3-wrapper/CHANGELOG.md
@@ -1,7 +1,9 @@
 # CHANGELOG
 
-## v0.2.1 _TBD_
+## v0.3.0 _TBD, 2018_
 
+    * Add `web3Wrapper.takeSnapshotAsync`, `web3Wrapper.revertSnapshotAsync`, `web3Wrapper.mineBlockAsync`, `web3Wrapper.increaseTimeAsync` (#426)
+    * Add `web3Wrapper.isZeroExWeb3Wrapper` for runtime instanceOf checks (#426)
     * Add a `getProvider` method (#444)
 
 ## v0.2.0 _March 4, 2018_
diff --git a/packages/web3-wrapper/src/index.ts b/packages/web3-wrapper/src/index.ts
index e14eb2914..02d5e4f7b 100644
--- a/packages/web3-wrapper/src/index.ts
+++ b/packages/web3-wrapper/src/index.ts
@@ -4,6 +4,8 @@ import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
 export class Web3Wrapper {
+    // This is here purely to reliably distinguish it from other objects in runtime (like BigNumber.isBigNumber)
+    public isZeroExWeb3Wrapper = true;
     private _web3: Web3;
     private _defaults: Partial<TxData>;
     private _jsonRpcRequestId: number;
@@ -92,6 +94,20 @@ export class Web3Wrapper {
         const normalizedAddresses = _.map(addresses, address => address.toLowerCase());
         return normalizedAddresses;
     }
+    public async takeSnapshotAsync(): Promise<number> {
+        const snapshotId = Number(await this._sendRawPayloadAsync<string>({ method: 'evm_snapshot', params: [] }));
+        return snapshotId;
+    }
+    public async revertSnapshotAsync(snapshotId: number): Promise<boolean> {
+        const didRevert = await this._sendRawPayloadAsync<boolean>({ method: 'evm_revert', params: [snapshotId] });
+        return didRevert;
+    }
+    public async mineBlockAsync(): Promise<void> {
+        await this._sendRawPayloadAsync<string>({ method: 'evm_mine', params: [] });
+    }
+    public async increaseTimeAsync(timeDelta: number): Promise<void> {
+        await this._sendRawPayloadAsync<string>({ method: 'evm_increaseTime', params: [timeDelta] });
+    }
     public async getLogsAsync(filter: Web3.FilterObject): Promise<Web3.LogEntry[]> {
         let fromBlock = filter.fromBlock;
         if (_.isNumber(fromBlock)) {
@@ -132,7 +148,7 @@ export class Web3Wrapper {
         const txHash = await promisify<string>(this._web3.eth.sendTransaction)(txData);
         return txHash;
     }
-    private async _sendRawPayloadAsync<A>(payload: Web3.JSONRPCRequestPayload): Promise<A> {
+    private async _sendRawPayloadAsync<A>(payload: Partial<Web3.JSONRPCRequestPayload>): Promise<A> {
         const sendAsync = this._web3.currentProvider.sendAsync.bind(this._web3.currentProvider);
         const response = await promisify<Web3.JSONRPCResponsePayload>(sendAsync)(payload);
         const result = response.result;