163             return "Test";
 164         }
 165     }
 166 
 167     private ClassFile compileAndReturn(String fullFile, String testClass, String... extraParams) throws Exception {
 168         File source = writeTestFile(fullFile);
 169         File clazzFile = compileTestFile(source, testClass);
 170         return ClassFile.read(clazzFile);
 171     }
 172 
 173     protected File writeTestFile(String fullFile) throws IOException {
 174         File f = new File("Test.java");
 175         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
 176         out.println(fullFile);
 177         out.close();
 178         return f;
 179     }
 180 
 181     protected File compileTestFile(File f, String testClass, String... extraParams) {
 182         List<String> options = new ArrayList<>();
 183         options.addAll(Arrays.asList("-source", "1.8"));
 184         options.addAll(Arrays.asList(extraParams));
 185         options.add(f.getPath());
 186         int rc = com.sun.tools.javac.Main.compile(options.toArray(new String[options.size()]));
 187         if (rc != 0)
 188             throw new Error("compilation failed. rc=" + rc);
 189         String path;
 190         if (f.getParent() != null) {
 191             path = f.getParent();
 192         } else {
 193             path = "";
 194         }
 195 
 196         return new File(path + testClass + ".class");
 197     }
 198 
 199     private String wrap(String compact) {
 200         StringBuilder sb = new StringBuilder();
 201 
 202         // Automatically import java.util
 203         sb.append("\nimport java.util.*;");

 163             return "Test";
 164         }
 165     }
 166 
 167     private ClassFile compileAndReturn(String fullFile, String testClass, String... extraParams) throws Exception {
 168         File source = writeTestFile(fullFile);
 169         File clazzFile = compileTestFile(source, testClass);
 170         return ClassFile.read(clazzFile);
 171     }
 172 
 173     protected File writeTestFile(String fullFile) throws IOException {
 174         File f = new File("Test.java");
 175         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
 176         out.println(fullFile);
 177         out.close();
 178         return f;
 179     }
 180 
 181     protected File compileTestFile(File f, String testClass, String... extraParams) {
 182         List<String> options = new ArrayList<>();

 183         options.addAll(Arrays.asList(extraParams));
 184         options.add(f.getPath());
 185         int rc = com.sun.tools.javac.Main.compile(options.toArray(new String[options.size()]));
 186         if (rc != 0)
 187             throw new Error("compilation failed. rc=" + rc);
 188         String path;
 189         if (f.getParent() != null) {
 190             path = f.getParent();
 191         } else {
 192             path = "";
 193         }
 194 
 195         return new File(path + testClass + ".class");
 196     }
 197 
 198     private String wrap(String compact) {
 199         StringBuilder sb = new StringBuilder();
 200 
 201         // Automatically import java.util
 202         sb.append("\nimport java.util.*;");