Avoid directly using newish Buffer APIs (#1448)

Ensure AVA doesn’t use Buffer APIs that are unavailable in Node.js releases older than 4.5.

lib/snapshot-manager.js

@@ -10,6 +10,7 @@ const concordance = require('concordance');
 const indentString = require('indent-string');
 const makeDir = require('make-dir');
 const md5Hex = require('md5-hex');
+const Buffer = require('safe-buffer').Buffer;
 
 const concordanceOptions = require('./concordance-options').snapshotManager;
 

package.json

@@ -162,6 +162,7 @@
 		"pretty-ms": "^2.0.0",
 		"require-precompiled": "^0.1.0",
 		"resolve-cwd": "^2.0.0",
+		"safe-buffer": "^5.1.1",
 		"slash": "^1.0.0",
 		"source-map-support": "^0.4.0",
 		"stack-utils": "^1.0.0",

test/cli.js

@@ -9,6 +9,7 @@ const makeDir = require('make-dir');
 const touch = require('touch');
 const uniqueTempDir = require('unique-temp-dir');
 const execa = require('execa');
+const Buffer = require('safe-buffer').Buffer;
 const stripAnsi = require('strip-ansi');
 
 const cliPath = path.join(__dirname, '../cli.js');

test/fixture/formatting.js

@@ -1,5 +1,6 @@
 import React from 'react';
 import renderer from 'react-test-renderer';
+import {Buffer} from 'safe-buffer';
 import HelloMessage from './HelloMessage'
 import test from '../../';