add workaround for randomly failing tests

On slower machines (such as the tests slaves of travis) the debounce
will sometimes not reduce all events of a unlink to one call. This is
can lead to weird effects as the first event is a 'change' which
triggers an unexpected read.

For now force a longer debounce when running tests

lib/reload.js

@@ -36,6 +36,7 @@ function ReloadJSON(options) {
     this.files = {};
     this.watching = {};
     this.persistent = options.persistent;
+    this.delay = options.delay || 10;
 }
 
 util.inherits(ReloadJSON, EventEmitter);
@@ -73,6 +74,7 @@ ReloadJSON.prototype.read = function (path) {
 ReloadJSON.prototype.configureWatch = function (path) {
     var self = this,
         watching = this.watching,
+        delay = this.delay,
         watch;
 
     if (watching[path]) {
@@ -96,7 +98,7 @@ ReloadJSON.prototype.configureWatch = function (path) {
         if (ev === 'change' && !self.files[path]) {
             self.read(path);
         }
-    }, 10));
+    }, delay));
 
     watch.on('error', function (err) {
         self.emit('error', err);

test/component/reload.coffee

@@ -21,10 +21,15 @@ describe "reload-json", ->
   beforeEach (done) ->
     errorcb = sinon.stub()
     reload = new Reload
+      delay: 50
     reload.on 'error', errorcb
     fs.writeFile filepath, JSON.stringify(file: 'test.json'), (err) ->
       done()
 
+  afterEach (done) ->
+    # wait for debounce
+    setTimeout done, 50
+
   it "returns the same data when reading the same file", (done) ->
     readOne = null
     readTwo = null

test/unit/reload.coffee

@@ -90,7 +90,8 @@ describe "reload-json", ->
       reload.configureWatch 'foo'
       reload.on 'change', (ev, filename) ->
         assert.equal filename, 'foo'
-        done()
+        # wait for debounce
+        setTimeout done, 20
 
       watch.emit 'change', 'change', 'foo'