added a few tests checking the headers actually being set

package.json

@@ -63,7 +63,7 @@
     "mocha": "^1.21.3",
     "mocha-lcov-reporter": "0.0.1",
     "moment": "~2.4.0",
-    "nock": "~0.28.1",
+    "nock": "~0.28.3",
     "open": "0.0.4",
     "optimist": "~0.6.0",
     "sinon": "~1.7.3",
@@ -87,4 +87,4 @@
   "engines": {
     "node": ">=0.8 <0.11"
   }
-}
+}

test/unit/specs/http_connector.js

@@ -356,7 +356,7 @@ describe('Http Connector', function () {
       });
     });
 
-    it('Can handle uncompress errors', function (done) {
+    it('Can handle decompression errors', function (done) {
       var server = nock('http://esjs.com:9200');
       var con = new HttpConnection(new Host('http://esjs.com:9200'));
       var body = 'blah';
@@ -429,6 +429,38 @@ describe('Http Connector', function () {
         done();
       });
     });
+
+    it('does not set the Accept-Encoding header by default', function (done) {
+      var con = new HttpConnection(new Host());
+      var respBody = 'i should not be encoded';
+      var server = nock('http://localhost:9200')
+      .matchHeader('accept-encoding', undefined)
+      .get('/')
+      .once()
+      .reply(200, respBody);
+
+      con.request({}, function (err, resp, status) {
+        expect(resp).to.be(respBody);
+        server.done();
+        done();
+      });
+    });
+
+    it('sets the Accept-Encoding header when specified', function (done) {
+      var con = new HttpConnection(new Host({ suggestCompression: true }));
+      var respBody = 'i should be encoded';
+      var server = nock('http://localhost:9200')
+      .matchHeader('accept-encoding', 'gzip,deflate')
+      .get('/')
+      .once()
+      .reply(200, respBody);
+
+      con.request({}, function (err, resp, status) {
+        expect(resp).to.be(respBody);
+        server.done();
+        done();
+      });
+    });
   });
 
   describe('Connection cleanup', function () {