NetBeans7.0でテスト

ファイルの読込みをテストしようとしたが、、、

• テスト対象クラス

public class Reader {
    public static Map<String, String> getMapFromTxt1() {
        Map<String, String> map = new TreeMap<String, String>();
        String path = new File(getPath()).getParent();
        StringBuilder sb = new StringBuilder();
        sb.append(path).append(File.separator).append("xxx.txt");
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader(sb.toString()));
            for (String line = reader.readLine(); line != null; line = reader.readLine()) { // ☆ここをモック
            //                System.out.println("line=" + line);
                String[] values = line.split(",");
                map.put(values[0], values[1]);
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Reader.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Reader.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException ex) {}
            }
        }
        return map;
    }

    private static String getPath() {
        return "/Users/tomo/test1/test2/test3";
    }
    
}

• テストクラス

public class ReaderTest {
    @Test
    public void testSomeMethod() throws Exception {
        new Expectations(){
            final FileReader fileReader = null;
            BufferedReader reader;
            {
                new BufferedReader(new FileReader("file"));
            }
            {
                reader.readLine(); // ☆ここでモックを設定
                returns("11,aaa");
                returns(null);
                reader.close();
            }
        };
        Map<String, String> map = Reader.getMapFromTxt1();
        for (String key : map.keySet()) {
            System.out.println("key=" + key);
        }
    }
}

Missing invocation of ... エラーが発生？