ruby - pangram

ruby/pangram/README.md

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+# Pangram
+
+Determine if a sentence is a pangram. A pangram (Greek: παν γράμμα, pan gramma,
+"every letter") is a sentence using every letter of the alphabet at least once.
+The best known English pangram is:
+> The quick brown fox jumps over the lazy dog.
+
+The alphabet used consists of ASCII letters `a` to `z`, inclusive, and is case
+insensitive. Input will not contain non-ASCII symbols.
+
+* * * *
+
+For installation and learning resources, refer to the
+[Ruby resources page](http://exercism.io/languages/ruby/resources).
+
+For running the tests provided, you will need the Minitest gem. Open a
+terminal window and run the following command to install minitest:
+
+    gem install minitest
+
+If you would like color output, you can `require 'minitest/pride'` in
+the test file, or note the alternative instruction, below, for running
+the test file.
+
+Run the tests from the exercise directory using the following command:
+
+    ruby pangram_test.rb
+
+To include color from the command line:
+
+    ruby -r minitest/pride pangram_test.rb
+
+
+## Source
+
+Wikipedia [https://en.wikipedia.org/wiki/Pangram](https://en.wikipedia.org/wiki/Pangram)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

ruby/pangram/pangram.rb

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+# Pangram class
+class Pangram
+  def self.pangram?(sentence)
+    sentence.downcase!
+    ('a'..'z').each { |char| return false unless sentence.include?(char) }
+    true
+  end
+end

ruby/pangram/pangram_test.rb

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+require 'minitest/autorun'
+require_relative 'pangram'
+
+# Common test data version: 1.4.1 2c020bc
+class PangramTest < Minitest::Test
+  def test_sentence_empty
+    # skip
+    sentence = ''
+    result = Pangram.pangram?(sentence)
+    refute result, "Expected false, got: #{result.inspect}. #{sentence.inspect} is NOT a pangram"
+  end
+
+  def test_recognizes_a_perfect_lower_case_pangram
+    # skip
+    sentence = 'abcdefghijklmnopqrstuvwxyz'
+    result = Pangram.pangram?(sentence)
+    assert result, "Expected true, got: #{result.inspect}. #{sentence.inspect} IS a pangram"
+  end
+
+  def test_pangram_with_only_lower_case
+    # skip
+    sentence = 'the quick brown fox jumps over the lazy dog'
+    result = Pangram.pangram?(sentence)
+    assert result, "Expected true, got: #{result.inspect}. #{sentence.inspect} IS a pangram"
+  end
+
+  def test_missing_character_x
+    # skip
+    sentence = 'a quick movement of the enemy will jeopardize five gunboats'
+    result = Pangram.pangram?(sentence)
+    refute result, "Expected false, got: #{result.inspect}. #{sentence.inspect} is NOT a pangram"
+  end
+
+  def test_missing_character_h
+    # skip
+    sentence = 'five boxing wizards jump quickly at it'
+    result = Pangram.pangram?(sentence)
+    refute result, "Expected false, got: #{result.inspect}. #{sentence.inspect} is NOT a pangram"
+  end
+
+  def test_pangram_with_underscores
+    # skip
+    sentence = 'the_quick_brown_fox_jumps_over_the_lazy_dog'
+    result = Pangram.pangram?(sentence)
+    assert result, "Expected true, got: #{result.inspect}. #{sentence.inspect} IS a pangram"
+  end
+
+  def test_pangram_with_numbers
+    # skip
+    sentence = 'the 1 quick brown fox jumps over the 2 lazy dogs'
+    result = Pangram.pangram?(sentence)
+    assert result, "Expected true, got: #{result.inspect}. #{sentence.inspect} IS a pangram"
+  end
+
+  def test_missing_letters_replaced_by_numbers
+    # skip
+    sentence = '7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog'
+    result = Pangram.pangram?(sentence)
+    refute result, "Expected false, got: #{result.inspect}. #{sentence.inspect} is NOT a pangram"
+  end
+
+  def test_pangram_with_mixed_case_and_punctuation
+    # skip
+    sentence = '"Five quacking Zephyrs jolt my wax bed."'
+    result = Pangram.pangram?(sentence)
+    assert result, "Expected true, got: #{result.inspect}. #{sentence.inspect} IS a pangram"
+  end
+
+  def test_upper_and_lower_case_versions_of_the_same_character_should_not_be_counted_separately
+    # skip
+    sentence = 'the quick brown fox jumps over with lazy FX'
+    result = Pangram.pangram?(sentence)
+    refute result, "Expected false, got: #{result.inspect}. #{sentence.inspect} is NOT a pangram"
+  end
+end