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29 lines
742 B
Crystal
29 lines
742 B
Crystal
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require "../spec_helper"
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Spectator.describe Spectator::LazyWrapper do
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it "returns the value of the block" do
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expect { subject.get { 42 } }.to eq(42)
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end
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it "caches the value" do
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wrapper = described_class.new
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count = 0
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expect { wrapper.get { count += 1 } }.to change { count }.from(0).to(1)
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expect { wrapper.get { count += 1 } }.to_not change { count }
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end
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# This type of nesting is used when `super` is called in a subject block.
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# ```
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# subject { super.to_s }
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# ```
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it "works with nested wrappers" do
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outer = described_class.new
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inner = described_class.new
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value = outer.get do
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inner.get { 42 }.to_s
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end
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expect(value).to eq("42")
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expect(value).to be_a(String)
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end
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end
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