Question

第一次测试通过，但其他两次没有。我的语法错在哪里？唯一的区别是match与eq。我知道我之前使用过match，但我似乎无法在网上找到好的文档。

我得到的错误是：undefined method 'match' for 1:Fixnum

describe Die do
    describe "new roll" do #TEST PASSES
        it "returns a number" do
            expect(Die.instance_method(:initialize).arity).to eq 1
        end
    end

    describe "new roll" do # error undefined method 'match' for 1:Fixnum
        it "returns a number" do
            expect(Die.instance_method(:initialize).arity).to match 1
        end
    end

    describe "new roll" do # error expected /\d/ got 1
        it "returns a number" do
            expect(Die.instance_method(:initialize).arity).to eq (/\d/)
        end
    end
end

Answer 1

你的第二个测试没有通过，因为match可以将字符串或正则表达式与字符串进行比较，而不是Fixnums。您的第三个测试未通过，因为正则表达式/\d/与 1的相等，匹配字符串"1"

describe Die do
    describe "new roll" do #TEST PASSES
        it "returns a number" do
            expect(Die.instance_method(:initialize).arity).to eq(1)
        end
    end

    describe "new roll" do
        it "returns a number" do
            # 1.to_s equals the String "1" ...
            expect(Die.instance_method(:initialize).arity.to_s).to eq("1")
        end
    end

    describe "new roll" do
        it "returns a number" do
            # ... and "1" matches the regex /\d/
            expect(Die.instance_method(:initialize).arity.to_s).to match(/\d/)
        end
    end
end

Rspec匹配语法

1 个答案: