add tests

test/integration.js

@@ -189,14 +189,55 @@ describe('Copay server', function() {
       });
     });
 
-  describe.skip('#getInstanceWithAuth', function() {
+    describe('#getInstanceWithAuth', function() {
         beforeEach(function() {});
 
-    it('should get server instance for existing copayer', function(done) {});
+        it('should get server instance for existing copayer', function(done) {
+            helpers.createAndJoinWallet(1, 2, function(s, wallet, copayers, copayerIds) {
+                var xpriv = copayers[0].xPrivKey;
+                var priv = Bitcore.HDPrivateKey
+                  .fromString(xpriv)
+                  .derive('m/1/0')
+                  .privateKey
+                  .toString();
 
-    it('should fail when requesting for non-existent copayer', function(done) {});
+              var message = 'hola';
+              var sig = SignUtils.sign(message, priv);
 
-    it('should fail when message signature cannot be verified', function(done) {});
+              CopayServer.getInstanceWithAuth({
+                copayerId: copayerIds[0],
+                message: message,
+                signature: sig,
+              }, function(err, server) {
+                should.not.exist(err);
+                done();
+              });
+            });
+        });
+
+      it('should fail when requesting for non-existent copayer', function(done) {
+        CopayServer.getInstanceWithAuth({
+          copayerId: 'ads',
+          message: 'dummy',
+          signature: 'dummy',
+        }, function(err, server) {
+          err.should.contain('Copayer not found');
+          done();
+        });
+      });
+
+      it('should fail when message signature cannot be verified', function(done) {
+        helpers.createAndJoinWallet(1, 2, function(s, wallet, copayers, copayerIds) {
+          CopayServer.getInstanceWithAuth({
+            copayerId: copayerIds[0],
+            message: 'dummy',
+            signature: 'dummy',
+          }, function(err, server) {
+            err.should.contain('Invalid signature');
+            done();
+          });
+        });
+      });
     });
 
   describe('#createWallet', function() {