public void testTypeVarDeclr() {
    String ex = "String a;";
    ParserContext ctx = new ParserContext();
    ExpressionCompiler compiler = new ExpressionCompiler(ex);
    compiler.compile(ctx);

    assertNotNull(ctx.getVariables());
    assertEquals(1, ctx.getVariables().entrySet().size());
    for (Map.Entry<String, Class> entry : ctx.getVariables().entrySet()) {
      assertEquals(String.class, entry.getValue());
    }
  }
  public void testMultiTypeVarDeclr3() {
    String ex = "int a = 52 * 3, b = 8, c = 16;";
    ParserContext ctx = new ParserContext();
    ExpressionCompiler compiler = new ExpressionCompiler(ex);
    Serializable s = compiler.compile(ctx);

    assertNotNull(ctx.getVariables());
    assertEquals(3, ctx.getVariables().entrySet().size());
    for (Map.Entry<String, Class> entry : ctx.getVariables().entrySet()) {
      assertEquals(int.class, entry.getValue());
    }

    Map vars = new HashMap();
    executeExpression(s, vars);

    assertEquals(52 * 3, vars.get("a"));
    assertEquals(8, vars.get("b"));
    assertEquals(16, vars.get("c"));
  }