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Pattern matching support for arguments #515

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Pattern matching support for arguments #515

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4 changes: 4 additions & 0 deletions lib/rake/task_arguments.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,10 @@ def fetch(*args, &block)
@hash.fetch(*args, &block)
end

def deconstruct_keys(keys)
@hash.slice(*keys)
end

protected

def lookup(name) # :nodoc:
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7 changes: 7 additions & 0 deletions test/test_rake_task_arguments.rb
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Expand Up @@ -54,6 +54,13 @@ def test_to_hash
assert_equal 0, h.fetch(:one)
end

def test_deconstruct_keys
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omit "No stable pattern matching until Ruby 3.1 (testing #{RUBY_VERSION})" if RUBY_VERSION < "3.1"

ta = Rake::TaskArguments.new([:a, :b, :c], [1, 2, 3])
assert_equal ta.deconstruct_keys([:a, :b]), { a: 1, b: 2 }
end

def test_enumerable_behavior
ta = Rake::TaskArguments.new([:a, :b, :c], [1, 2, 3])
assert_equal [10, 20, 30], ta.map { |k, v| v * 10 }.sort
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