Start a spec for Pin::DelegatedMethod

spec/pin/delegated_method_spec.rb

@@ -0,0 +1,40 @@
+require 'pry'
+
+describe Solargraph::Pin::DelegatedMethod do
+  it 'can be constructed from a Method pin' do
+    method_pin = Solargraph::Pin::Method.new(comments: '@return [Hash<String, String>]')
+
+    delegation_pin = Solargraph::Pin::DelegatedMethod.new(method: method_pin, scope: :instance)
+    expect(delegation_pin.return_type.to_s).to eq('Hash<String, String>')
+  end
+
+  it 'can be constructed from a receiver source and method name' do
+    api_map = Solargraph::ApiMap.new
+    source = Solargraph::Source.load_string(%(
+      class Class1
+        # @return [String]
+        def name; end
+      end
+
+      class Class2
+        # @return [Class1]
+        def collaborator; end
+      end
+    ))
+    api_map.map source
+
+    class2 = api_map.get_path_pins('Class2').first
+
+    chain = Solargraph::Source::Chain.new([Solargraph::Source::Chain::Call.new('collaborator')])
+    pin = Solargraph::Pin::DelegatedMethod.new(
+      closure: class2,
+      scope: :instance,
+      name: 'name',
+      receiver: chain
+    )
+
+    pin.probe(api_map)
+
+    expect(pin.return_type.to_s).to eq('String')
+  end
+end