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Add solutions to about_pattern_matching.rb #57

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44 changes: 22 additions & 22 deletions src/about_pattern_matching.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ def test_pattern_may_not_match
end
rescue Exception => ex
# What exception has been caught?
assert_equal __, ex.class
assert_equal __(NoMatchingPatternError), ex.class
end
end

Expand All @@ -22,7 +22,7 @@ def test_we_can_use_else
:no_match
end

assert_equal __, result
assert_equal __(:no_match), result
end

# ------------------------------------------------------------------
Expand All @@ -41,10 +41,10 @@ def value_pattern(variable)
end

def test_value_pattern
assert_equal __, value_pattern(0)
assert_equal __, value_pattern(5)
assert_equal __, value_pattern(100)
assert_equal __, value_pattern('Not a Number!')
assert_equal __(:match_exact_value), value_pattern(0)
assert_equal __(:match_in_range), value_pattern(5)
assert_equal __(:match_with_class), value_pattern(100)
assert_equal __(:no_match), value_pattern('Not a Number!')
end

# ------------------------------------------------------------------
Expand All @@ -60,7 +60,7 @@ def variable_pattern_with_binding(variable)
end

def test_variable_pattern_with_binding
assert_equal __, variable_pattern_with_binding(1)
assert_equal __(0), variable_pattern_with_binding(1)
end

# ------------------------------------------------------------------
Expand All @@ -77,7 +77,7 @@ def variable_pattern_with_pin(variable)
end

def test_variable_pattern_with_pin
assert_equal __, variable_pattern_with_pin(1)
assert_equal __(:no_match), variable_pattern_with_pin(1)
end

# ------------------------------------------------------------------
Expand All @@ -94,8 +94,8 @@ def pattern_with_dropping(variable)
end

def test_pattern_with_dropping
assert_equal __, pattern_with_dropping(['I will not be checked', 2])
assert_equal __, pattern_with_dropping(['I will not be checked', 'But I will!'])
assert_equal __(:match), pattern_with_dropping(['I will not be checked', 2])
assert_equal __(:no_match), pattern_with_dropping(['I will not be checked', 'But I will!'])
end

# ------------------------------------------------------------------
Expand All @@ -112,10 +112,10 @@ def alternative_pattern(variable)
end

def test_alternative_pattern
assert_equal __, alternative_pattern(0)
assert_equal __, alternative_pattern(false)
assert_equal __, alternative_pattern(nil)
assert_equal __, alternative_pattern(4)
assert_equal __(:match), alternative_pattern(0)
assert_equal __(:match), alternative_pattern(false)
assert_equal __(:match), alternative_pattern(nil)
assert_equal __(:no_match), alternative_pattern(4)
end

# ------------------------------------------------------------------
Expand All @@ -135,7 +135,7 @@ def as_pattern
end

def test_as_pattern
assert_equal __, as_pattern
assert_equal __('I was petrified'), as_pattern
end

# ------------------------------------------------------------------
Expand Down Expand Up @@ -163,8 +163,8 @@ def array_pattern(deconstructible)
end

def test_array_pattern
assert_equal __, array_pattern(Deconstructible.new('abcd'))
assert_equal __, array_pattern(Deconstructible.new('123'))
assert_equal __(['b', 'c']), array_pattern(Deconstructible.new('abcd'))
assert_equal __(:no_match), array_pattern(Deconstructible.new('123'))
end

# ------------------------------------------------------------------
Expand Down Expand Up @@ -193,8 +193,8 @@ def hash_pattern(deconstructible_as_hash)
end

def test_hash_pattern
assert_equal __, hash_pattern(LetterAccountant.new('aaabbc'))
assert_equal __, hash_pattern(LetterAccountant.new('xyz'))
assert_equal __([3, 2]), hash_pattern(LetterAccountant.new('aaabbc'))
assert_equal __([0, 0]), hash_pattern(LetterAccountant.new('xyz'))
end

# we can write it even shorter
Expand All @@ -208,8 +208,8 @@ def hash_pattern_with_sugar(deconstructible_as_hash)
end

def test_hash_pattern_with_sugar
assert_equal __, hash_pattern_with_sugar(LetterAccountant.new('aaabbc'))
assert_equal __, hash_pattern_with_sugar(LetterAccountant.new('xyz'))
assert_equal __([3, 2]), hash_pattern_with_sugar(LetterAccountant.new('aaabbc'))
assert_equal __([0, 0]), hash_pattern_with_sugar(LetterAccountant.new('xyz'))
end

end
end