test dependencies update (#290)

* updating test dependencies

Author: SomkaPe

pom.xml

@@ -95,41 +95,29 @@
 
 		<!-- test dependencies -->
 		<dependency>
-			<groupId>org.testng</groupId>
-			<artifactId>testng</artifactId>
-			<version>6.8.8</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.powermock</groupId>
-			<artifactId>powermock-module-testng</artifactId>
-			<version>1.6.5</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.powermock</groupId>
-			<artifactId>powermock-api-easymock</artifactId>
-			<version>1.6.5</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.easymock</groupId>
-			<artifactId>easymock</artifactId>
-			<version>3.4</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>net.sourceforge.cobertura</groupId>
-			<artifactId>cobertura</artifactId>
-			<version>2.0.3</version>
-			<scope>test</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>com.sun</groupId>
-					<artifactId>tools</artifactId>
-				</exclusion>
-			</exclusions>
-		</dependency>
+            		<groupId>org.testng</groupId>
+            		<artifactId>testng</artifactId>
+            		<version>7.1.0</version>
+            		<scope>test</scope>
+        	</dependency>
+        	<dependency>
+            		<groupId>org.powermock</groupId>
+            		<artifactId>powermock-module-testng</artifactId>
+            		<version>2.0.0</version>
+            		<scope>test</scope>
+        	</dependency>
+        	<dependency>
+            		<groupId>org.powermock</groupId>
+            		<artifactId>powermock-api-easymock</artifactId>
+            		<version>2.0.0</version>
+            		<scope>test</scope>
+        	</dependency>
+        	<dependency>
+            		<groupId>org.easymock</groupId>
+            		<artifactId>easymock</artifactId>
+            		<version>4.0.2</version>
+            		<scope>test</scope>
+        	</dependency>
 	</dependencies>
 
 	<!-- force https -->
@@ -183,31 +171,6 @@
 					<target>1.7</target>
 				</configuration>
 			</plugin>
-			<plugin>
-				<groupId>org.codehaus.mojo</groupId>
-				<artifactId>cobertura-maven-plugin</artifactId>
-				<version>2.6</version>
-				<configuration>
-					<instrumentation>
-						<excludes>
-							<exclude>*/*Test.class</exclude>
-						</excludes>
-					</instrumentation>
-					<formats>
-						<format>xml</format>
-						<format>html</format>
-					</formats>
-				</configuration>
-				<dependencies>
-					<dependency>
-						<groupId>com.sun</groupId>
-						<artifactId>tools</artifactId>
-						<version>1.6</version>
-						<scope>system</scope>
-						<systemPath>${tools-jar}</systemPath>
-					</dependency>
-				</dependencies>
-			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-javadoc-plugin</artifactId>

src/test/java/com/microsoft/aad/adal4j/AdalOAuthRequestTest.java

@@ -25,6 +25,7 @@
 
 import static org.testng.Assert.assertNotNull;
 
+import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
@@ -33,7 +34,6 @@
 
 import com.nimbusds.oauth2.sdk.http.HTTPRequest.Method;
 import com.nimbusds.oauth2.sdk.http.HTTPResponse;
-import org.apache.tools.ant.filters.StringInputStream;
 import org.easymock.EasyMock;
 import org.powermock.api.easymock.PowerMock;
 import org.powermock.core.classloader.annotations.PrepareForTest;
@@ -139,7 +139,9 @@ public void testCreateResponseFor404() throws Exception {
                 .createMock(HttpURLConnection.class);
         EasyMock.expect(conn.getResponseCode()).andReturn(404);
         EasyMock.expect(conn.getErrorStream()).andReturn(null);
-        InputStream stream = new StringInputStream("stream");
+
+        InputStream stream =  new ByteArrayInputStream( "stream".getBytes() );
+
         EasyMock.expect(conn.getInputStream()).andReturn(stream);
         PowerMock.replay(conn);
         final String response = Whitebox.invokeMethod(request,

src/test/java/com/microsoft/aad/adal4j/HttpHelperTest.java

@@ -24,12 +24,11 @@
 package com.microsoft.aad.adal4j;
 
 import javax.net.ssl.HttpsURLConnection;
-import java.io.IOException;
+import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.io.StringReader;
 import java.net.URL;
 
-import org.apache.tools.ant.util.ReaderInputStream;
 import org.easymock.EasyMock;
 import org.powermock.api.easymock.PowerMock;
 import org.testng.annotations.Test;
@@ -50,9 +49,7 @@ public void testReadResponseFromConnection_ResponseCodeNot200()
         EasyMock.expect(connection.getResponseCode()).andReturn(403).times(2);
         EasyMock.expect(connection.getURL()).andReturn(new URL("https://some.url"));
 
-        String testInput = "error info";
-        StringReader reader = new StringReader(testInput);
-        InputStream is = new ReaderInputStream(reader);
+        InputStream is =  new ByteArrayInputStream( "error info".getBytes() );
 
         EasyMock.expect(connection.getErrorStream()).andReturn(is).times(1);