add eslint and mochacli tasks, default watch task, fix tests

Author: caktux

.eslintrc

@@ -9,6 +9,7 @@
   },
   "rules": {
     "curly": 0,
+    "eqeqeq": 0,
     "quotes": 0,
     "strict": 0
   }

Gruntfile.js

@@ -12,8 +12,37 @@ module.exports = function(grunt) {
           "lib/debugAbi.js": "src/debugAbi.js"
         }
       }
+    },
+    eslint: {
+      options: {
+        configFile: '.eslintrc'
+      },
+      target: ['Gruntfile.js', 'src/*.js']
+    },
+    mochacli: {
+      options: {
+        bail: true
+      },
+      all: ['test/*.js']
+    },
+    watch: {
+      src: {
+        files: ["src/*.js"],
+        tasks: ["eslint", "babel"],
+        options: {
+          spawn: false
+        }
+      }
     }
   });
+
   grunt.loadNpmTasks('grunt-babel');
-  grunt.registerTask("default", ["babel"]);
+  grunt.loadNpmTasks('grunt-eslint');
+  grunt.loadNpmTasks('grunt-mocha-cli');
+  grunt.loadNpmTasks('grunt-contrib-watch');
+
+  grunt.registerTask("lint", ["eslint"]);
+  grunt.registerTask("build", ["eslint", "babel"]);
+  grunt.registerTask('test', ["build", 'mochacli']);
+  grunt.registerTask("default", ["build", "watch:src"]);
 };

lib/btc-swap.js

@@ -4,7 +4,7 @@
   "description": "Ethereum Bitcoin Swap library",
   "main": "lib/btc-swap.js",
   "scripts": {
-    "test": "grunt && mocha"
+    "test": "grunt build && mocha"
   },
   "repository": {
     "type": "git",
@@ -23,15 +23,19 @@
   },
   "homepage": "https://github.com/etherex/btc-swap#readme",
   "devDependencies": {
-    "babel-core": "^5.7.2",
+    "babel-core": "^5.7.4",
+    "eslint": "^0.24.1",
     "grunt": "^0.4.5",
-    "grunt-babel": "^5.0.1"
+    "grunt-babel": "^5.0.1",
+    "grunt-contrib-watch": "^0.6.1",
+    "grunt-eslint": "^16.0.0",
+    "grunt-mocha-cli": "^1.13.1",
+    "mocha": "^2.2.5"
   },
   "dependencies": {
     "bignumber.js": "^2.0.7",
     "bitcoin-proof": "^1.0.0",
     "bitcoinjs-lib": "^1.5.7",
-    "mocha": "^2.2.5",
     "web3": "^0.8.1"
   }
 }