Add expected windows env variables for unit tests

Author: Murali Medisetty

Tasks/Npm/Tests/test-commandWithoutArguments.ts

@@ -6,6 +6,8 @@ import util = require('./NpmMockHelper');
 let taskPath = path.join(__dirname, '..', 'npmtask.js');
 let taskMockRunner = new tmrm.TaskMockRunner(taskPath);
 let npmMockHelper = new util.NpmMockHelper(taskMockRunner, "root", "");
+process.env['HOMEDRIVE'] = 'C:\\';
+process.env['HOMEPATH'] = 'Users\\none';
 
 if (process.argv.length == 3) {
     if (process.argv[2] === "useDeprecated") {

Tasks/Npm/Tests/test-configlist.ts

@@ -6,6 +6,8 @@ import util = require('./NpmMockHelper');
 let taskPath = path.join(__dirname, '..', 'npmtask.js');
 let taskMockRunner = new tmrm.TaskMockRunner(taskPath);
 let npmMockHelper = new util.NpmMockHelper(taskMockRunner, "config", "list");
+process.env['HOMEDRIVE'] = 'C:\\';
+process.env['HOMEPATH'] = 'Users\\none';
 
 if (process.argv.length == 3) {
     if (process.argv[2] === "useDeprecated") {

Tasks/Npm/Tests/test-npmFailure.ts

@@ -6,6 +6,8 @@ import util = require('./NpmMockHelper');
 let taskPath = path.join(__dirname, '..', 'npmtask.js');
 let taskMockRunner = new tmrm.TaskMockRunner(taskPath);
 let npmMockHelper = new util.NpmMockHelper(taskMockRunner, "root", "");
+process.env['HOMEDRIVE'] = 'C:\\';
+process.env['HOMEPATH'] = 'Users\\none';
 
 let mock = require('vsts-task-lib/mock-toolrunner');
 mock.exec = () => {