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‎00_hello/hello_spec.rb‎

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# # Hello!
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#
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# This lab teaches basic Ruby function syntax.
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#
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# ## Open a terminal in this directory
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#
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# cd 00_hello
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#
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# This directory is the starting point for this exercise. It contains a spec file and you'll be adding a ruby file to (eventually) make the specs pass.
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#
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# ## Run the test
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#
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# rake
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#
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# ## Watch it fail
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#
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# You should see an error. **Don't get scared!** Try to read it and figure out what the computer wants to tell you. Somewhere on the first line it should say something like
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#
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# no such file to load -- test-first-teaching/hello/hello (LoadError)
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#
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# That means that it is looking for a file called `hello.rb` and can't find it.
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#
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# ## Create hello.rb
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#
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# Open up `hello.rb` in a text editor. Save it. Run the test again.
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#
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# rake
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#
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# ## Watch it fail
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#
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# Now you should see an error like this:
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#
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# the hello function
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# says hello (FAILED - 1)
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#
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# Failures:
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#
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# 1) the hello function says hello
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# Failure/Error: hello.should == "Hello!"
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# NameError:
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# undefined local variable or method `hello' for #<RSpec::Core::ExampleGroup::Nested_1:0x000001009b8808>
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# # ./hello/hello_spec.rb:5:in `block (2 levels) in <top (required)>'
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#
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# ## Create the hello function
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#
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# Fix this by opening `hello.rb` and creating an empty function:
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#
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# def hello
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# end
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#
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# Save it. Run the test again.
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#
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# ## Watch it fail
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#
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# Now you should see an error like this:
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#
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# the hello function
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# says hello (FAILED - 1)
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#
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# Failures:
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#
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# 1) the hello function says hello
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# Failure/Error: hello().should == "Hello!"
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# expected: "Hello!"
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# got: nil (using ==)
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# # ./hello/hello_spec.rb:5:in `block (2 levels) in <top (required)>'
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#
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# This means that while it found the file, and it found the function, it's not returning anything! ("nil" is the Ruby way of saying "not anything".)
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#
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# ## Make it return something
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#
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# Inside the "hello" function, put a single line containing a string that is *not* "Hello!". (Here we are simulating you making an honest mistake, so we can see what the error message looks like.)
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#
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# def hello
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# "whuh?"
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# end
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#
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# Save it. Run the test again.
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#
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# ## Watch it fail
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#
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# Now you should see an error like this:
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#
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# 1) the hello function says hello
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# Failure/Error: hello().should == "Hello!"
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# expected: "Hello!"
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# got: "whuh?" (using ==)
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# # ./hello/hello_spec.rb:5:in `block (2 levels) in <top (required)>'
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#
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# Correct this by changing "whuh?" to "Hello!". Save it. Run the test again.
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#
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# ## Watch it pass!
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#
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# Hooray! Finally! It works!
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#
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# ## Give yourself a high five
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#
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# Also, sing a song and do a little dance.
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#
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# ## And then...
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#
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# Fix the next failure! `:-)`
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#
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# the hello function
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# says hello
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#
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# the greet function
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# says hello to someone (FAILED - 1)
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#
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# In order to get the next test to pass, your function will need to accept an *argument*.
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#
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# def greet(who)
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# "Hello, #{who}!"
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# end
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#
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# <!-- -->
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require "hello"
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describe "the hello function" do

‎00_hello/index.html‎

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<html>
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<head>
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<title>Test-First Teaching: learn_ruby: hello</title>
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<link href="../assets/style.css" media="screen" rel="stylesheet" type="text/css" />
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</head>
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<body>
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<div class='header'>
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<h1><a href="http://testfirst.org">TestFirst.org</a></h1>
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<h2>the home of test-first teaching</h2>
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</div>
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<div class="nav"><h2><a href="../index.html">learn_ruby</a></h2><b>Labs:</b><ul><li>00 Hello</li><li><a href="../01_temperature/index.html">01 Temperature</a></li><li><a href="../02_calculator/index.html">02 Calculator</a></li><li><a href="../03_mega_calculator/index.html">03 Mega Calculator</a></li><li><a href="../04_simon_says/index.html">04 Simon Says</a></li><li><a href="../05_pig_latin/index.html">05 Pig Latin</a></li><li><a href="../06_silly_blocks/index.html">06 Silly Blocks</a></li><li><a href="../07_performance_monitor/index.html">07 Performance Monitor</a></li><li><a href="../08_hello_friend/index.html">08 Hello Friend</a></li><li><a href="../09_temperature_object/index.html">09 Temperature Object</a></li><li><a href="../10_book_titles/index.html">10 Book Titles</a></li><li><a href="../11_timer/index.html">11 Timer</a></li><li><a href="../12_dictionary/index.html">12 Dictionary</a></li><li><a href="../13_rpn_calculator/index.html">13 Rpn Calculator</a></li><li><a href="../14_xml_document/index.html">14 Xml Document</a></li><li><a href="../15_array_extensions/index.html">15 Array Extensions</a></li><li><a href="../16_in_words/index.html">16 In Words</a></li></ul></div>
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<div class="info"><h1>hello</h1><ul><li><a href="hello_spec.rb">hello_spec.rb</a></li></ul></div>
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<div class='content'>
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<h1>Hello!</h1>
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<head>
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<title>Test-First Teaching: learn_ruby: hello</title>
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<link href="../assets/style.css" media="screen" rel="stylesheet" type="text/css" />
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</head>
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<body>
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<div class="header">
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<h1><a href="http://testfirst.org">TestFirst.org</a></h1>
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<h2>the home of test-first teaching</h2>
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</div>
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<div class="nav">
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<h2><a href="../index.html">learn_ruby</a></h2>
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<b>Labs:</b>
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<ul>
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<li>00 Hello</li>
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<li><a href="../01_temperature/index.html">01 Temperature</a></li>
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<li><a href="../02_calculator/index.html">02 Calculator</a></li>
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<li><a href="../03_simon_says/index.html">03 Simon Says</a></li>
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<li><a href="../04_pig_latin/index.html">04 Pig Latin</a></li>
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<li><a href="../05_silly_blocks/index.html">05 Silly Blocks</a></li>
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<li><a href="../06_performance_monitor/index.html">06 Performance Monitor</a></li>
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<li><a href="../07_hello_friend/index.html">07 Hello Friend</a></li>
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<li><a href="../08_temperature_object/index.html">08 Temperature Object</a></li>
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<li><a href="../09_book_titles/index.html">09 Book Titles</a></li>
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<li><a href="../10_timer/index.html">10 Timer</a></li>
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<li><a href="../11_dictionary/index.html">11 Dictionary</a></li>
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<li><a href="../12_rpn_calculator/index.html">12 Rpn Calculator</a></li>
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<li><a href="../13_xml_document/index.html">13 Xml Document</a></li>
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<li><a href="../14_array_extensions/index.html">14 Array Extensions</a></li>
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<li><a href="../15_in_words/index.html">15 In Words</a></li>
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</ul>
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</div>
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<h1>hello</h1>
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<div class="content"><div class="rspec_file"> <div class="intro"><h1>Hello!</h1>
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<p>This lab teaches basic Ruby function syntax.</p>
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<p>This directory is the starting point for this exercise. It contains a spec file and you'll be adding a ruby file to (eventually) make the specs pass.</p>
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<h2>Run the spec</h2>
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<h2>Run the test</h2>
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<pre><code>rake
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</code></pre>
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<h2>Create hello.rb</h2>
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41-
<p>Open up <code>hello.rb</code> in a text editor. Save it. Run the spec again.</p>
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<p>Open up <code>hello.rb</code> in a text editor. Save it. Run the test again.</p>
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<pre><code>rake
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</code></pre>
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end
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</code></pre>
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<p>Save it. Run the spec again.</p>
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<p>Save it. Run the test again.</p>
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<h2>Watch it fail</h2>
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end
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</code></pre>
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<p>Save it. Run the spec again.</p>
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<p>Save it. Run the test again.</p>
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<h2>Watch it fail</h2>
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# ./hello/hello_spec.rb:5:in `block (2 levels) in &lt;top (required)&gt;'
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</code></pre>
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<p>Correct this by changing "whuh?" to "Hello!". Save it. Run the spec again.</p>
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<p>Correct this by changing "whuh?" to "Hello!". Save it. Run the test again.</p>
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<h2>Watch it pass!</h2>
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<!-- -->
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</div>
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<div class="tests">
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<h1>Tests</h1>
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<a class="raw_file" href="hello_spec.rb">hello_spec.rb</a>
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<pre>require &quot;hello&quot;
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describe &quot;the hello function&quot; do
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it &quot;says hello&quot; do
170+
hello.should == &quot;Hello!&quot;
171+
end
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end
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describe &quot;the greet function&quot; do
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it &quot;says hello to someone&quot; do
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greet(&quot;Bob&quot;).should == &quot;Hello, Bob!&quot;
177+
end
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end</pre>
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</div>
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<div class='footer'>
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<a href="http://testfirst.org">TestFirst.org</a>
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</div>
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</body>
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</div>
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</div>
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<div class="footer"><a href="http://testfirst.org">TestFirst.org</a></div>
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</body>
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</html>

‎01_temperature/index.html‎

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<html>
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<head>
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<title>Test-First Teaching: learn_ruby: temperature</title>
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<link href="../assets/style.css" media="screen" rel="stylesheet" type="text/css" />
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</head>
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<body>
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<div class='header'>
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<h1><a href="http://testfirst.org">TestFirst.org</a></h1>
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<h2>the home of test-first teaching</h2>
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</div>
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<div class="nav"><h2><a href="../index.html">learn_ruby</a></h2><b>Labs:</b><ul><li><a href="../00_hello/index.html">00 Hello</a></li><li>01 Temperature</li><li><a href="../02_calculator/index.html">02 Calculator</a></li><li><a href="../03_mega_calculator/index.html">03 Mega Calculator</a></li><li><a href="../04_simon_says/index.html">04 Simon Says</a></li><li><a href="../05_pig_latin/index.html">05 Pig Latin</a></li><li><a href="../06_silly_blocks/index.html">06 Silly Blocks</a></li><li><a href="../07_performance_monitor/index.html">07 Performance Monitor</a></li><li><a href="../08_hello_friend/index.html">08 Hello Friend</a></li><li><a href="../09_temperature_object/index.html">09 Temperature Object</a></li><li><a href="../10_book_titles/index.html">10 Book Titles</a></li><li><a href="../11_timer/index.html">11 Timer</a></li><li><a href="../12_dictionary/index.html">12 Dictionary</a></li><li><a href="../13_rpn_calculator/index.html">13 Rpn Calculator</a></li><li><a href="../14_xml_document/index.html">14 Xml Document</a></li><li><a href="../15_array_extensions/index.html">15 Array Extensions</a></li><li><a href="../16_in_words/index.html">16 In Words</a></li></ul></div>
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<div class="info"><h1>temperature</h1><ul><li><a href="temperature_spec.rb">temperature_spec.rb</a></li></ul></div>
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<div class='content'>
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<h1>Topics:</h1>
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<head>
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<title>Test-First Teaching: learn_ruby: temperature</title>
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<link href="../assets/style.css" media="screen" rel="stylesheet" type="text/css" />
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</head>
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<body>
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<div class="header">
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<h1><a href="http://testfirst.org">TestFirst.org</a></h1>
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<h2>the home of test-first teaching</h2>
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</div>
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<div class="nav">
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<h2><a href="../index.html">learn_ruby</a></h2>
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<b>Labs:</b>
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<ul>
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<li><a href="../00_hello/index.html">00 Hello</a></li>
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<li>01 Temperature</li>
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<li><a href="../02_calculator/index.html">02 Calculator</a></li>
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<li><a href="../03_simon_says/index.html">03 Simon Says</a></li>
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<li><a href="../04_pig_latin/index.html">04 Pig Latin</a></li>
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<li><a href="../05_silly_blocks/index.html">05 Silly Blocks</a></li>
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<li><a href="../06_performance_monitor/index.html">06 Performance Monitor</a></li>
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<li><a href="../07_hello_friend/index.html">07 Hello Friend</a></li>
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<li><a href="../08_temperature_object/index.html">08 Temperature Object</a></li>
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<li><a href="../09_book_titles/index.html">09 Book Titles</a></li>
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<li><a href="../10_timer/index.html">10 Timer</a></li>
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<li><a href="../11_dictionary/index.html">11 Dictionary</a></li>
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<li><a href="../12_rpn_calculator/index.html">12 Rpn Calculator</a></li>
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<li><a href="../13_xml_document/index.html">13 Xml Document</a></li>
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<li><a href="../14_array_extensions/index.html">14 Array Extensions</a></li>
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<li><a href="../15_in_words/index.html">15 In Words</a></li>
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</ul>
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</div>
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<h1>temperature</h1>
34+
<div class="content"><div class="rspec_file"> <div class="intro"><h1>Topics:</h1>
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1636
<ul>
1737
<li>functions</li>
@@ -30,9 +50,64 @@ <h1>Hints</h1>
3050
<p>In floating point math, there <strong>are</strong> fractions. So...</p>
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<p> 1.0 / 2.0 => 0.5</p>
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</div>
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<div class="tests">
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<h1>Tests</h1>
56+
<a class="raw_file" href="temperature_spec.rb">temperature_spec.rb</a>
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<pre>
58+
require &quot;temperature&quot;
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60+
describe &quot;temperature conversion functions&quot; do
61+
62+
describe &quot;#ftoc&quot; do
63+
64+
it &quot;converts freezing temperature&quot; do
65+
ftoc(32).should == 0
66+
end
67+
68+
it &quot;converts boiling temperature&quot; do
69+
ftoc(212).should == 100
70+
end
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72+
it &quot;converts body temperature&quot; do
73+
ftoc(98.6).should == 37
74+
end
75+
76+
it &quot;converts arbitrary temperature&quot; do
77+
ftoc(68).should == 20
78+
end
79+
80+
end
81+
82+
describe &quot;#ctof&quot; do
83+
84+
it &quot;converts freezing temperature&quot; do
85+
ctof(0).should == 32
86+
end
87+
88+
it &quot;converts boiling temperature&quot; do
89+
ctof(100).should == 212
90+
end
91+
92+
it &quot;converts arbitrary temperature&quot; do
93+
ctof(20).should == 68
94+
end
95+
96+
it &quot;converts body temperature&quot; do
97+
ctof(37).should be_within(0.1).of(98.6)
98+
# Why do we need to use be_within?
99+
# See http://www.ruby-forum.com/topic/169330
100+
# and http://en.wikipedia.org/wiki/IEEE_754-2008
101+
# and http://en.wikipedia.org/wiki/Double_precision_floating-point_format
102+
# Also, try &quot;puts 0.5 - 0.4 - 0.1&quot; -- pretty crazy, right?
103+
end
104+
105+
end
106+
107+
end</pre>
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</div>
34-
<div class='footer'>
35-
<a href="http://testfirst.org">TestFirst.org</a>
36-
</div>
37-
</body>
109+
</div>
110+
</div>
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<div class="footer"><a href="http://testfirst.org">TestFirst.org</a></div>
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</body>
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</html>

‎01_temperature/temperature_spec.rb‎

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# # Topics:
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# * functions
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# * floating-point math
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#
5+
# # Hints
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#
7+
# Remember that one degree fahrenheit is 5/9 of one degree celsius, and that the freezing point of water is 0 degrees celsius but 32 degrees fahrenheit.
8+
#
9+
# In integer math, there **are no fractions**. So if you are using integer literals, you will be using integer math, which means, for example...
10+
#
11+
# 1 / 2 => 0
12+
#
13+
# In floating point math, there **are** fractions. So...
14+
#
15+
# 1.0 / 2.0 => 0.5
16+
#
17+
118
require "temperature"
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describe "temperature conversion functions" do

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