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Support variables and methods for type matcher (be_a).
Addresses https://github.com/icy-arctic-fox/spectator/issues/25
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3 changed files with 32 additions and 1 deletions
26
spec/matchers/type_matcher_spec.cr
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26
spec/matchers/type_matcher_spec.cr
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@ -0,0 +1,26 @@
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require "../spec_helper"
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Spectator.describe Spectator::Matchers::TypeMatcher do
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context String do # Sets `described_class` to String
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def other_type
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Int32
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end
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describe "#|" do
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it "works on sets" do
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super_set = (described_class | other_type)
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expect(42).to be_kind_of(super_set)
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expect("foo").to be_a(super_set)
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end
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end
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it "works on described_class" do
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expect("foo").to be_a_kind_of(described_class)
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end
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it "works on plain types" do
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expect(42).to be_a(Int32)
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end
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end
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end
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@ -77,7 +77,7 @@ module Spectator
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# expect(x).to be_a(Int32 | String)
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# ```
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macro be_a(expected)
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::Spectator::Matchers::TypeMatcher({{expected}}).new
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::Spectator::Matchers::TypeMatcher.create({{expected}})
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end
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# Indicates that some value should be of a specified type.
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@ -4,6 +4,11 @@ module Spectator::Matchers
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# Matcher that tests a value is of a specified type.
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# The values are compared with the `Object#is_a?` method.
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struct TypeMatcher(Expected) < StandardMatcher
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# Alternate constructor that works with constant types and types from variables.
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def self.create(type : T.class) forall T
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TypeMatcher(T).new
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end
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# Short text about the matcher's purpose.
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# This explains what condition satisfies the matcher.
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# The description is used when the one-liner syntax is used.
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