Do not skip tests silently

core/src/test/java/hudson/FilePathTest.java

@@ -58,6 +58,7 @@ import org.apache.tools.ant.Project;
 import org.apache.tools.ant.taskdefs.Chmod;
 import static org.junit.Assert.*;
 import static org.junit.Assume.assumeTrue;
+import static org.junit.Assume.assumeFalse;
 import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
@@ -464,7 +465,7 @@ public class FilePathTest {
     }
 
     @Test public void symlinkInTar() throws Exception {
-        if (Functions.isWindows())  return; // can't test on Windows
+        assumeFalse("can't test on Windows", Functions.isWindows());
 
         FilePath tmp = new FilePath(temp.getRoot());
             FilePath in = tmp.child("in");

core/src/test/java/hudson/LauncherTest.java

@@ -34,6 +34,8 @@ import java.io.File;
 import jenkins.security.MasterToSlaveCallable;
 import org.apache.commons.io.FileUtils;
 import static org.junit.Assert.*;
+
+import org.junit.Assume;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
@@ -46,10 +48,7 @@ public class LauncherTest {
 
     @Issue("JENKINS-4611")
     @Test public void remoteKill() throws Exception {
-        if (File.pathSeparatorChar != ':') {
-            System.err.println("Skipping, currently Unix-specific test");
-            return;
-        }
+        Assume.assumeFalse("Skipping, currently Unix-specific test", Functions.isWindows());
 
         File tmp = temp.newFile();
 

core/src/test/java/hudson/util/ProcessTreeTest.java

@@ -8,6 +8,8 @@ import java.io.IOException;
 import java.io.Serializable;
 import jenkins.security.MasterToSlaveCallable;
 import static org.junit.Assert.*;
+
+import org.junit.Assume;
 import org.junit.Rule;
 import org.junit.Test;
 
@@ -26,9 +28,7 @@ public class ProcessTreeTest {
     }
     
     @Test public void remoting() throws Exception {
-        // on some platforms where we fail to list any processes, this test will just not work
-        if (ProcessTree.get()==ProcessTree.DEFAULT)
-            return;
+        Assume.assumeFalse("on some platforms where we fail to list any processes", ProcessTree.get()==ProcessTree.DEFAULT);
 
         Tag t = channels.french.call(new MyCallable());