Utility to assist in writing Node SDK Unit tests

Adding a utility file that will simplify the
process of writing and adding Node SDK unit
tests. Additionally, this file allows the user
to run tests against different environments
without modifying the unit test files, by
instead modifying a set of environment variables.

Change-Id: I7a2a2d714024584ab91417cbb8f83b5e365ab182
Signed-off-by: Allen E Bailey <eabailey@us.ibm.com>

sdk/node/test/unit/test-util.js

@@ -0,0 +1,111 @@
+/**
+ * Copyright 2016 IBM
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+var hfc = require('hfc');
+var util = require('util');
+var fs = require('fs');
+
+//Set defaults, if not set
+var deployMode = process.env.SDK_DEPLOY_MODE
+ ? process.env.SDK_DEPLOY_MODE
+ : "net" ;
+var keyStore = process.env.SDK_KEYSTORE
+ ? process.env.SDK_KEYSTORE
+ : "/tmp/keyValStore" ;
+var caCert   = process.env.SDK_CA_CERT_FILE
+ ? process.env.SDK_CA_CERT_FILE
+ : "tlsca.cert" ;
+var caCertHost = process.env.SDK_CA_CERT_HOST
+ ? process.env.SDK_CA_CERT_HOST
+ : "" ;
+var caAddr   = process.env.SDK_MEMBERSRVC_ADDRESS
+ ? process.env.SDK_MEMBERSRVC_ADDRESS
+ : "localhost:7054" ;
+var peerAddr0 = process.env.SDK_PEER_ADDRESS
+ ? process.env.SDK_PEER_ADDRESS
+ : "localhost:7051" ;
+var tlsOn    = ( process.env.SDK_TLS == null )
+ ? Boolean(false)
+ : Boolean(parseInt(process.env.SDK_TLS));
+var deployWait  = process.env.SDK_DEPLOYWAIT
+ ? process.env.SDK_DEPLOYWAIT
+ : 20;
+var invokeWait  = process.env.SDK_INVOKEWAIT
+ ? process.env.SDK_INVOKEWAIT
+ : 5;
+var ciphers = process.env.GRPC_SSL_CIPHER_SUITES
+
+console.log("deployMode      :"+deployMode );
+console.log("keyStore        :"+keyStore );
+console.log("caCert          :"+caCert   );
+console.log("caAddr          :"+caAddr   );
+console.log("peerAddr0       :"+peerAddr0 );
+console.log("tlsOn           :"+tlsOn    );
+console.log("deployWait      :"+deployWait  );
+console.log("invokeWait      :"+invokeWait  );
+console.log("ciphers         :"+ciphers  );
+
+function getTestChain(name) {
+   name = name || "testChain";
+   var chain = hfc.newChain(name);
+
+   chain.setKeyValStore(hfc.newFileKeyValStore(keyStore));
+   if (tlsOn) {
+      if (fs.existsSync(caCert)) {
+         var pem = fs.readFileSync(caCert);
+         if (caCertHost) { var grpcOpts={ pem:pem, hostnameOverride:'tlsca' } }
+         else { var grpcOpts={ pem:pem } };
+
+         console.log("Setting membersrvc address to grpcs://" + caAddr);
+         console.log("Setting peer address to grpcs://" + peerAddr0);
+         console.log("Setting cert to " + caCert);
+
+         chain.setMemberServicesUrl("grpcs://" + caAddr, { pem:pem, hostnameOverride:'tlsca' } );
+         chain.addPeer("grpcs://" + peerAddr0, { pem:pem, hostnameOverride:'tlsca' } );
+      } else {
+         console.log("TLS was requested but " + caCert + " not found.")
+         process.exit(1)
+      }
+   } else {
+      console.log("Setting membersrvc address to grpc://" + caAddr);
+      console.log("Setting peer address to grpc://" + peerAddr0);
+      chain.setMemberServicesUrl("grpc://" + caAddr);
+      chain.addPeer("grpc://" + peerAddr0);
+   }
+   //
+   // Set the chaincode deployment mode to either developent mode (user runs chaincode)
+   // or network mode (code package built and sent to the peer).
+   console.log("$SDK_DEPLOY_MODE: " + deployMode);
+   if (deployMode === 'dev') {
+       chain.setDevMode(true);
+   } else {
+       chain.setDevMode(false);
+   }
+   chain.setDeployWaitTime(parseInt(deployWait));
+   chain.setInvokeWaitTime(parseInt(invokeWait));
+   return chain;
+}
+
+exports.getTestChain = getTestChain;
+exports.deployMode  = deployMode
+exports.keyStore  = keyStore
+exports.caCert    = caCert
+exports.caAddr    = caAddr
+exports.peerAddr0  = peerAddr0
+exports.tlsOn     = tlsOn
+exports.deployWait   = deployWait
+exports.invokeWait   = invokeWait
+exports.ciphers   = ciphers