Test value types

spec/spectator/lazy_wrapper_spec.cr

@@ -0,0 +1,28 @@
+require "../spec_helper"
+
+Spectator.describe Spectator::LazyWrapper do
+  it "returns the value of the block" do
+    expect { subject.get { 42 } }.to eq(42)
+  end
+
+  it "caches the value" do
+    wrapper = described_class.new
+    count = 0
+    expect { wrapper.get { count += 1 } }.to change { count }.from(0).to(1)
+    expect { wrapper.get { count += 1 } }.to_not change { count }
+  end
+
+  # This type of nesting is used when `super` is called in a subject block.
+  # ```
+  # subject { super.to_s }
+  # ```
+  it "works with nested wrappers" do
+    outer = described_class.new
+    inner = described_class.new
+    value = outer.get do
+      inner.get { 42 }.to_s
+    end
+    expect(value).to eq("42")
+    expect(value).to be_a(String)
+  end
+end