public static void createTestSuites(File baseDir, String className, String pkgName) throws IOException {
    	File dir = makeDir(baseDir, pkgName);
    	String srcCode = ALL_TESTS_CODE.replaceAll("%CLASSNAME%", className);
    	srcCode = srcCode.replaceAll("%PACKAGE%", pkgName);
    	FileWriter out = null;
		try {
			out = new FileWriter(new File(dir, className + ".java"));
			out.write(srcCode);
		} finally {
			if (out != null) {
				try { out.close(); } catch (IOException e) {}
			}
		}
    }
Create the Java source file a JUnit TestSuite which 
includes all TestCases within a package directory.
@param baseDir the base package directory
@param className the class name
@param pkgName the java package name
@throws IOException
Ghidra/Framework/Generic/src/main/java/ghidra/util/TestSuiteUtilities.java