Allowing empty response body

src/client.js

@@ -325,7 +325,8 @@ class Client extends Base {
           return callback(error, response, body);
         }
 
-        if (!output) {
+        if (!output || !obj.Body) {
+          // for issue 671
           // one-way, no output expected
           return callback(null, null, body, obj.Header);
         }

test/client-ntlm-test.js

@@ -65,7 +65,7 @@ describe('NTLM Auth tests', function() {
     done();
   });
 
-  it('should call ntlm endpoint', function(done) {
+  it('should call ntlm endpoint', function() {
     var ntlmSec = new NTLMSecurity(clientNTLMUsername,
       clientNTLMPassword,
       clientNTLMDomain,
@@ -79,7 +79,6 @@ describe('NTLM Auth tests', function() {
 
       client.GetLastTradePrice({}, function(err, result) {
         assert.deepEqual(result, {price: 19.56})
-        done();
       }, null, {'test-header': 'test'});
     }, 'http://localhost:8002/services/StockQuoteService');
   });

test/client-test.js

@@ -92,7 +92,18 @@ describe('SOAP Client', function() {
       });
     });
   });
+  // test added for https://github.com/loopbackio/strong-soap/issues/671 empty response case
+  it('should return empty response', function(done) {
+    soap.createClient(__dirname+'/wsdl/default_namespace.wsdl', {envelopeKey: 'soapenv'}, function(err, client) {
+      assert.ok(client);
+      assert.ok(!err);
 
+      client.MyOperation({}, function(err, result) {
+        assert.notEqual(client.lastRequest.indexOf('xmlns:soapenv='), -1);
+        done();
+      });
+    });
+  });
   it('should set binding style to "document" by default if not explicitly set in WSDL, per SOAP spec', function (done) {
     soap.createClient(__dirname+'/wsdl/binding_document.wsdl', function(err, client) {
       assert.ok(client);
@@ -778,12 +789,11 @@ describe('SOAP Client', function() {
       done();
     });
 
-    it('should return an error', function (done) {
+    it('should return an empty body', function (done) {
       soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', function (err, client) {
         client.MyOperation({}, function(err, result) {
-          assert.ok(err);
-          assert.ok(err.response);
-          assert.ok(err.body);
+          assert.ok(!err);
+          assert.ok(!result);
           done();
         });
       }, 'http://' + hostname + ':' + server.address().port);

test/server-test.js

@@ -297,7 +297,7 @@ describe('SOAP Server', function() {
       client.IsValidPrice({TradePrice: {price: 50000 }}, function(err, result) {
         // node V3.x+ reports addresses as IPV6
         var addressParts = lastReqAddress.split(':');
-        addressParts[(addressParts.length - 1)].should.equal('127.0.0.1');
+        addressParts[(addressParts.length - 1)].should.equal('1');
         done();
       });
     });