Implement inflection patches

lib/kangaru/patches/inflections.rb

@@ -0,0 +1,15 @@
+module Kangaru
+  module Patches
+    module Inflections
+      refine String do
+        def to_class_name
+          Inflectors::ClassInflector.inflect(self)
+        end
+
+        def to_constant_name
+          Inflectors::ConstantInflector.inflect(self)
+        end
+      end
+    end
+  end
+end

sig/kangaru/patches/inflections.rbs

@@ -0,0 +1,11 @@
+module Kangaru
+  module Patches
+    module Inflections : String
+      class ::String
+        def to_class_name: -> String
+
+        def to_constant_name: -> String
+      end
+    end
+  end
+end

spec/kangaru/patches/inflections_spec.rb

@@ -0,0 +1,40 @@
+RSpec.describe Kangaru::Patches::Inflections do
+  using described_class
+
+  describe String do
+    subject(:string) { "foo/bar/baz" }
+
+    shared_examples :delegates_to_inflector do |options|
+      let(:inflector_class) { options[:inflector] }
+
+      let(:inflector) { instance_double(inflector_class, inflect: "output") }
+
+      before do
+        allow(inflector_class).to receive(:new).and_return(inflector)
+      end
+
+      it "instantiates a #{options[:inflector]}" do
+        subject
+        expect(inflector_class).to have_received(:new).with(string).once
+      end
+
+      it "inflects and returns the output" do
+        expect(subject).to eq(inflector.inflect)
+      end
+    end
+
+    describe "#to_class_name" do
+      subject(:class_name) { string.to_class_name }
+
+      include_examples :delegates_to_inflector,
+                       inflector: Kangaru::Inflectors::ClassInflector
+    end
+
+    describe "#to_constant_name" do
+      subject(:constant_name) { string.to_constant_name }
+
+      include_examples :delegates_to_inflector,
+                       inflector: Kangaru::Inflectors::ConstantInflector
+    end
+  end
+end