Promisify emulator process (#26)

* Promisify emulator

* Remove console.log

* Allow to specify emulator ports

* Directly set access api port

* Add Prettier config

* Add jest refactor package.json

* Add docstrings to emulator methods

* Add Jest assertion methods

* Export new modules. Prettify.

* Set es6 flag to true

* Update files with missing headers

* Fix eslint config

* Add prettify script. Update lock file

* Specify config for Prettier

* Update documentation

* Update prettier config

* Update documentation

* Bump version

.eslintrc.js

@@ -1,8 +1,9 @@
 module.exports = {
+  extends: ["eslint:recommended", "plugin:jest/recommended"],
   env: {
     node: true,
+    es6: true
   },
-  extends: ["eslint:recommended", "plugin:jest/recommended"],
   parserOptions: {
     ecmaVersion: 12,
     sourceType: "module",

.prettierrc.json

@@ -0,0 +1,9 @@
+{
+	"printWidth": 100,
+	"endOfLine": "lf",
+	"semi": true,
+	"useTabs": false,
+	"singleQuote": false,
+	"trailingComma": "es5",
+	"tabWidth": 2
+}

docs/api.md

@@ -1,24 +1,89 @@
 # Table of Contents
+
+- [Init](#init)
+- [Emulator](#emulator)
+  - [start](#emulator.start)
+  - [stop](#emulator.stop)
 - [Accounts](#accounts)
-    - [getAccountAddress](#getaccountaddressname)
+  - [getAccountAddress](#getaccountaddressname)
 - [Contracts](#contracts)
-    - [deployContractByName](#deploycontractbynameprops)
-    - [deployContract](#deploycontractbynameprops)
-    - [getContractAddress](#getcontractaddressname-usedefaults--false)
+  - [deployContractByName](#deploycontractbynameprops)
+  - [deployContract](#deploycontractbynameprops)
+  - [getContractAddress](#getcontractaddressname-usedefaults--false)
 - [Cadence Code Templates](#cadence-code-templates)
-    - [getTemplate](#gettemplatefile-addressmap---byaddress--false)
-    - [getContractCode](#getcontractcodename-addressmap---service--false)
-    - [getTransactionCode](#gettransactioncodename-addressmap---service--false)
-    - [getScriptCode](#getscriptcodename-addressmap---service--false)
+  - [getTemplate](#gettemplatefile-addressmap---byaddress--false)
+  - [getContractCode](#getcontractcodename-addressmap---service--false)
+  - [getTransactionCode](#gettransactioncodename-addressmap---service--false)
+  - [getScriptCode](#getscriptcodename-addressmap---service--false)
 - [Send and Execute](#send-and-execute)
-    - [sendTransaction](#sendtransactionprops)
-    - [executeScript](#executescriptprops)
+  - [sendTransaction](#sendtransactionprops)
+  - [executeScript](#executescriptprops)
 - [FlowToken](#flowtoken)
-    - [getFlowBalance](#getflowbalanceaddress)
-    - [mintFlow](#mintflowrecipient-amount)
-  
+  - [getFlowBalance](#getflowbalanceaddress)
+  - [mintFlow](#mintflowrecipient-amount)
+
 ---
 
+## Init
+
+### init(basePath, port)
+
+Initializes framework variables and specifies port to use for HTTP and grpc access.
+`port` is set to 8080 by default. grpc port is calculated to `3569 + (port - 8080)` to allow multiple instances
+of emulator to be run in parallel
+
+- `basePath` - path to the folder, with Cadence template files
+- `port` - http port to use for access node
+
+```javascript
+import path from "path";
+import { init } from "js-testing-framework";
+
+describe("test setup", () => {
+  beforeEach(async (done) => {
+    const basePath = path.resolve(__dirname, "../cadence");
+    init(basePath);
+
+    // alternatively you can pass specific port
+    // init(basePath, 8085)
+
+    done();
+  });
+});
+```
+
+## Emulator
+
+### emulator.start
+
+Starts emulator on specified port.
+
+- `port` - number representing a port to use for access API
+- `logging` - whether log messages from emulator shall be added to the output
+
+### emulator.stop
+
+Stops emulator instance.
+
+```javascript
+describe("test setup", () => {
+  // Instantiate emulator and path to Cadence files
+  beforeEach(async (done) => {
+    const basePath = path.resolve(__dirname, "../cadence");
+    const port = 8080;
+    init(basePath, port);
+    await emulator.start(port, false);
+    done();
+  });
+
+  // Stop emulator, so it could be restarted
+  afterEach(async (done) => {
+    await emulator.stop();
+    done();
+  });
+});
+```
+
 ## Accounts
 
 ### getAccountAddress(name)
@@ -29,7 +94,7 @@ Next time when you call this method, it will grab exactly the same account. This
 and then use them throughout your code, without worrying that accounts match or trying to store/handle specific addresses.
 
 ```javascript
-import { getAccountAddress } from "flow-js-testing/dist";
+import { getAccountAddress } from "flow-js-testing";
 
 const main = async () => {
   const Alice = await getAccountAddress("Alice");
@@ -58,7 +123,7 @@ Usage:
 
 ```javascript
 import path from "path";
-import { init, deployContractByName } from "flow-js-testing/dist";
+import { init, deployContractByName } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -93,7 +158,7 @@ Usage:
 
 ```javascript
 import path from "path";
-import { deployContract } from "flow-js-testing/dist";
+import { deployContract } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -133,7 +198,7 @@ Returns address of the account, where contract is currently deployed.
   > Though if you don't pass second argument, you can override contracts deployed by default.
 
 ```javascript
-import { getContractAddress } from "flow-js-testing/dist";
+import { getContractAddress } from "flow-js-testing";
 
 const main = async () => {
   const contract = await getContractAddress("HelloWorld");
@@ -157,7 +222,7 @@ Returns Cadence template as string with addresses replaced using addressMap
 
 ```javascript
 import path from "path";
-import { init, getTemplate } from "flow-js-testing/dist";
+import { init, getTemplate } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -178,7 +243,7 @@ Returns Cadence template from file with `name` in `_basepath/contracts` folder
 
 ```javascript
 import path from "path";
-import { init, getContractCode } from "flow-js-testing/dist";
+import { init, getContractCode } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -206,7 +271,7 @@ Returns Cadence template from file with `name` in `_basepath/transactions` folde
 
 ```javascript
 import path from "path";
-import { init, getTransactionCode } from "flow-js-testing/dist";
+import { init, getTransactionCode } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -235,7 +300,7 @@ Returns Cadence template from file with `name` in `_basepath/scripts` folder
 
 ```javascript
 import path from "path";
-import { init, getScriptCode } from "flow-js-testing/dist";
+import { init, getScriptCode } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -259,12 +324,7 @@ If you don't have any contract dependencies, you can use those methods without s
 
 ```javascript
 import path from "path";
-import {
-  init,
-  getContractCode,
-  getTransactionCode,
-  getScriptCode,
-} from "flow-js-testing/dist";
+import { init, getContractCode, getTransactionCode, getScriptCode } from "flow-js-testing";
 
 const main = async () => {
   init(path.resolve(__dirname, "../cadence"));
@@ -296,7 +356,7 @@ Usage:
 
 ```javascript
 import { Int, UFix64 } from "@onflow/types";
-import { deployContract } from "flow-js-testing/dist";
+import { deployContract } from "flow-js-testing";
 
 const main = async () => {
   // Get signers adresses
@@ -349,7 +409,7 @@ Props object accepts following fields:
 
 ```javascript
 import { Int, UFix64 } from "@onflow/types";
-import { deployContract } from "flow-js-testing/dist";
+import { deployContract } from "flow-js-testing";
 
 const main = async () => {
   // Read or create script code
@@ -396,7 +456,7 @@ Returns current FlowToken balance of account specified by address
 Usage:
 
 ```javascript
-import { getFlowBalance } from "flow-js-testing/dist";
+import { getFlowBalance } from "flow-js-testing";
 
 const main = async () => {
   const Alice = await getAccountAddress("Alice");
@@ -420,7 +480,7 @@ Sends transaction to mint specified amount of FlowToken and send it to recipient
 - `amount` - amount to mint and send
 
 ```javascript
-import { mintFlow } from "flow-js-testing/dist";
+import { mintFlow } from "flow-js-testing";
 
 const main = async () => {
   const Alice = await getAccountAddress("Alice");
@@ -434,4 +494,4 @@ const main = async () => {
 };
 
 main();
-```
+```

docs/examples/basic.md

@@ -1,4 +1,5 @@
 # Basic usage
+
 Before using any of the methods you need to `init` the framework, basically telling where you Cadence
 code will live. In example below, we put all the Cadence code in the folder named `cadence` one level above the place
 where your test script is located.
@@ -11,6 +12,7 @@ Let's create `deploy.test.js` file and write some basic test, which would create
 
 ```javascript
 import path from "path";
+import { getAccountAddress } from "flow-js-testing";
 
 const basePath = path.resolve(__dirname, "../cadence");
 
@@ -35,4 +37,4 @@ describe("Accounts", () => {
 });
 ```
 
-Run emulator with `flow emulator -v` and then in another terminal run `jest`
+Run emulator with `flow emulator -v` and then in another terminal run `jest`

docs/examples/metadata.md

@@ -3,6 +3,8 @@ In this example we will pass `{String:String}` dictionary and log it out.
 
 ```javascript
 import path from "path";
+import * as t from "@onflow/types"
+import { init, executeScript } from "flow-js-testing"
 
 const basePath = path.resolve(__dirname, "../cadence");