ruby-on-rails - 未初始化常量 MiniTest::测试错误

Question

我正在尝试开始使用 Minitest。我收到以下错误:

`const_missing': uninitialized constant MiniTest::Test (NameError)

这是我的主要代码文件:

class BmiCalc

    def initialize(weight, height)
        @weight = weight;
        @height = height;
    end

    def bmi
        kgweight = @weight * 0.4535;
        meterheight = @height * 0.01;
        bmivalue = kgweight/(meterheight * meterheight);
        return bmivalue;
    end

end

print "Please Enter your Weight in lbs: ";
weight = gets.to_f;

print "Please Enter your Height in cm: ";
height = gets.to_f;

bmiCalc = BmiCalc.new(weight, height);
answer = bmiCalc.bmi;

printf("You have a BMI of #{'%.2f' % answer} \n");

这是我的 MiniTest 文件:

require 'minitest/autorun'
require_relative "bmicalc.rb"

class TestBmi < Minitest::Test

    def setup
        @bmicalc = BmiCalc.new(190, 250);
    end

    def test_answers
        assert_equal 31.40581717451523, @bmicalc.bmi;
    end

end

首先，我不明白为什么当我在测试文件中调用它时它要求我输入。我已经实例化了一个示例类，所以为什么它要求输入。

其次，我不确定我是否理解错误或错误的性质。我正在尝试按照本教程进行操作:http://blog.teamtreehouse.com/short-introduction-minitest

Answer 1

I don't understand why it asks for input from me when I call this in the test file

因为在您的测试文件中您需要 "bmicalc.rb"，它运行其中的所有代码。包括您的打印和获取行。

I am not sure I understand the error or the nature of it

也许你没有给予足够的重视？它是 Minitest::Test，而不是 Minitest::test。