11_dictionary/index.html

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    <h1>dictionary</h1>
    <div class="content"><div class="rspec_file">  <div class="intro"><h1>Topics</h1>

<ul>
<li>Hash</li>
<li>Array</li>
<li>instance variables</li>
<li>regular expressions</li>
</ul>

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    <h1>Tests</h1>
<a class="raw_file" href="dictionary_spec.rb">dictionary_spec.rb</a>
    <pre>
require 'dictionary'

describe Dictionary do
  before do
    @d = Dictionary.new
  end

  it 'is empty when created' do
    @d.entries.should == {}
  end

  it 'can add whole entries with keyword and definition' do
    @d.add('fish' =&gt; 'aquatic animal')
    @d.entries.should == {'fish' =&gt; 'aquatic animal'}
    @d.keywords.should == ['fish']
  end

  it 'add keywords (without definition)' do
    @d.add('fish')
    @d.entries.should == {'fish' =&gt; nil}
    @d.keywords.should == ['fish']
  end

  it 'can check whether a given keyword exists' do
    @d.include?('fish').should be_false
  end

  it &quot;doesn't cheat when checking whether a given keyword exists&quot; do
    @d.include?('fish').should be_false # if the method is empty, this test passes with nil returned
    @d.add('fish')
    @d.include?('fish').should be_true # confirms that it actually checks
    @d.include?('bird').should be_false # confirms not always returning true after add
  end

  it &quot;doesn't include a prefix that wasn't added as a word in and of itself&quot; do
    @d.add('fish')
    @d.include?('fi').should be_false
  end

  it &quot;doesn't find a word in empty dictionary&quot; do
    @d.find('fi').should be_empty # {}
  end

  it 'finds nothing if the prefix matches nothing' do
    @d.add('fiend')
    @d.add('great')
    @d.find('nothing').should be_empty
  end

  it &quot;finds an entry&quot; do
    @d.add('fish' =&gt; 'aquatic animal')
    @d.find('fish').should == {'fish' =&gt; 'aquatic animal'}
  end

  it 'finds multiple matches from a prefix and returns the entire entry (keyword + definition)' do
    @d.add('fish' =&gt; 'aquatic animal')
    @d.add('fiend' =&gt; 'wicked person')
    @d.add('great' =&gt; 'remarkable')
    @d.find('fi').should == {'fish' =&gt; 'aquatic animal', 'fiend' =&gt; 'wicked person'}
  end

  it 'lists keywords alphabetically' do
    @d.add('zebra' =&gt; 'African land animal with stripes')
    @d.add('fish' =&gt; 'aquatic animal')
    @d.add('apple' =&gt; 'fruit')
    @d.keywords.should == %w(apple fish zebra)
  end

  it 'can produce printable output like so: [keyword] &quot;definition&quot;' do
    @d.add('zebra' =&gt; 'African land animal with stripes')
    @d.add('fish' =&gt; 'aquatic animal')
    @d.add('apple' =&gt; 'fruit')
    @d.printable.should == %Q{[apple] &quot;fruit&quot;\n[fish] &quot;aquatic animal&quot;\n[zebra] &quot;African land animal with stripes&quot;}
  end
end</pre>
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