Fix non-system specific path separator

src/main/java/rife/bld/extension/TestNgOperation.java

@@ -75,6 +75,19 @@ public class TestNgOperation extends TestOperation<TestNgOperation, List<String>
         return this;
     }
 
+    private String buildClassPath(String... path) {
+        var classpath = new StringBuilder();
+        for (var p : path) {
+            if (!p.isBlank()) {
+                if (!classpath.isEmpty()) {
+                    classpath.append(File.pathSeparator);
+                }
+                classpath.append(p);
+            }
+        }
+        return classpath.toString();
+    }
+
     /**
      * This sets the default maximum number of threads to use for data providers when running tests in parallel.
      * It will only take effect if the parallel mode has been selected (for example,with the
@@ -202,11 +215,13 @@ public class TestNgOperation extends TestOperation<TestNgOperation, List<String>
 
             args.add("-cp");
             if (testClasspath_.isEmpty()) {
-                args.add(String.format("%s:%s:%s:%s", new File(project_.libTestDirectory(), "*"),
+                args.add(buildClassPath(joinClasspathJar(project_.testClasspathJars()),
-                        new File(project_.libCompileDirectory(), "*"), project_.buildMainDirectory(),
+                        joinClasspathJar(project_.compileClasspathJars()),
-                        project_.buildTestDirectory()));
+                        joinClasspathJar(project_.providedClasspathJars()),
+                        project_.buildMainDirectory().getAbsolutePath(),
+                        project_.buildTestDirectory().getAbsolutePath()));
             } else {
-                args.add(String.join(":", testClasspath_));
+                args.add(String.join(File.pathSeparator, testClasspath_));
             }
 
             args.add("org.testng.TestNG");
@@ -372,6 +387,14 @@ public class TestNgOperation extends TestOperation<TestNgOperation, List<String>
         return this;
     }
 
+    private String joinClasspathJar(List<File> jars) {
+        if (!jars.isEmpty()) {
+            return String.join(File.pathSeparator, jars.stream().map(File::getAbsolutePath).toList());
+        } else {
+            return "";
+        }
+    }
+
     /**
      * The list of {@code .class} files or list of class names implementing {@code ITestListener} or
      * {@code ISuiteListener}