public void Test_Add_1_2_R_3()
{
Calcer c = new Calcer();
var r = c.Add(1, 2);
Assert.Equal(3, r, "1+2不等于3？");
}
public void Test_Add_1_2_R_4()
{
Calcer c = new Calcer();
var r = c.Add(1, 2);
Assert.Equal(4, r, "1+2不等于4.fail");
}