part2_spec.rb

require 'ruby_intro.rb'

describe "#hello" do
  it "should be defined" do
    expect { hello("Testing") }.not_to raise_error()#::NoMethodError)
  end

  it "The hello method returns the correct string [30 points]" , points: 30 do
    expect(hello("Dan").class).to eq(String)
    expect(hello("Dan")).to eq('Hello, Dan'), "Incorrect results for input: \"Dan\""
    expect(hello("BILL")).to eq('Hello, BILL'), "Incorrect results for input: \"BILL\""
    expect(hello("Mr. Ilson")).to eq('Hello, Mr. Ilson'), "Incorrect results for input: \"Mr. Ilson\""
  end
end

describe "#starts_with_consonant?" do
  it "should be defined" do
    expect { starts_with_consonant?("d") }.not_to raise_error()#::NoMethodError)
  end
  it 'classifies true cases [10 points]' , points: 10 do
    expect(starts_with_consonant?('v')).to be_truthy, "'v' is a consonant"
    ['v', 'vest', 'Veeee', 'crypt'].each do |string|
      expect(starts_with_consonant?(string)).to be_truthy, "Incorrect results for input: \"#{string}\""
    end
  end
  it 'classifies false cases [10 points]' , points: 10 do
    expect(starts_with_consonant?('a')).to be_falsy, "'a' is not a consonant"
    ['asdfgh', 'Unix'].each do |string|
      expect(starts_with_consonant?(string)).to be_falsy, "Incorrect results for input: \"#{string}\""
    end
  end
  it 'works on the empty string [5 points]' , points: 5 do
    expect(starts_with_consonant?('')).to be_falsy
  end
  it 'works on nonletters [5 points]' , points: 5 do
    expect(starts_with_consonant?('#foo')).to be_falsy
  end
end

describe "#binary_multiple_of_4?" do
  it "should be defined" do
    expect { binary_multiple_of_4?("yes") }.not_to raise_error()#::NoMethodError)
  end
  it "classifies valid binary numbers [30 points]" , points: 30 do
    ["1010101010100", "0101010101010100", "100", "0"].each do |string|
      expect(binary_multiple_of_4?(string)).to be_truthy,  "Incorrect results for input: \"#{string}\""
    end
    ["101", "1000000000001"].each do |string|
      expect(binary_multiple_of_4?(string)).not_to be_truthy,  "Incorrect results for input: \"#{string}\""
    end
  end
  it "rejects invalid binary numbers [10 points]" , points: 10 do
    expect(binary_multiple_of_4?('a100')).to be_falsy, "'a100' is not a valid binary number!"
    expect(binary_multiple_of_4?('')).to be_falsy, "The empty string is not a valid binary number!"
  end
end