Runtime assertions for Ruby
literal.fun
ruby
Add the `_Pattern` type
+43
+12
lib/literal/types.rb
+12
lib/literal/types.rb
···
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end
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end
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def _Pattern(regex, &block)
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raise ArgumentError "Block required for Pattern" unless block
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-> (value) {
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if (data = regex.match(value))
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!!block.call(*data.captures, **data.named_captures&.transform_keys(&:to_sym))
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else
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false
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end
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}
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end
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def _Predicate(message, &block)
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PredicateType.new(message:, block:)
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end
+31
test/types/_pattern.test.rb
+31
test/types/_pattern.test.rb
···
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# frozen_string_literal: true
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include Literal::Types
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test "with named params" do
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pattern = _Pattern(/\A(?<year>\d{4})-(?<month>\d{2})-(?<day>\d{2})\z/) do |year:, month:, day:|
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year.to_i >= 2000 && month.to_i.between?(1, 12) && day.to_i.between?(1, 31)
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end
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assert pattern === "2023-04-15"
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assert pattern === "2050-01-01"
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refute pattern === "1999-12-31"
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refute pattern === "2023-13-01"
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refute pattern === "2023-01-32"
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refute pattern === "abc-12-31"
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end
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test "with positional params" do
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pattern = _Pattern(/\A(\d+)-(\d+)-(\d+)\z/) do |year, month, day|
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year.to_i >= 2000 && month.to_i.between?(1, 12) && day.to_i.between?(1, 31)
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end
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assert pattern === "2023-04-15"
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assert pattern === "2050-01-01"
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refute pattern === "1999-12-31"
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refute pattern === "2023-13-01"
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refute pattern === "2023-01-32"
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refute pattern === "abc-12-31"
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end