Introduce support for hanami generate part (#18)

* Introduce support for `hanami generate part`

* Cleanup

* Ensure to generate specs for base part classes

* Point back to `hanami/cli` `main` branch

* Introduce `let(:value)`

* `#ruby_implicity_keyword_argument?` -> `#ruby_omit_hash_values?`

lib/hanami/rspec.rb

@@ -35,6 +35,7 @@ def self.gem_loader
       Hanami::CLI.after "install", Commands::Install
       Hanami::CLI.after "generate slice", Commands::Generate::Slice
       Hanami::CLI.after "generate action", Commands::Generate::Action
+      Hanami::CLI.after "generate part", Commands::Generate::Part
     end
   end
 end

lib/hanami/rspec/commands.rb

@@ -99,6 +99,21 @@ def call(options, **)
             generator.call(app.namespace, slice, controller, action)
           end
         end
+
+        # @since 2.1.0
+        # @api private
+        class Part < Hanami::CLI::Commands::App::Command
+          # @since 2.1.0
+          # @api private
+          def call(options, **)
+            # FIXME: dry-cli kwargs aren't correctly forwarded in Ruby 3
+            slice = inflector.underscore(Shellwords.shellescape(options[:slice])) if options[:slice]
+            name = inflector.underscore(Shellwords.shellescape(options[:name]))
+
+            generator = Generators::Part.new(fs: fs, inflector: inflector)
+            generator.call(app.namespace, slice, name)
+          end
+        end
       end
     end
   end

lib/hanami/rspec/generators/part.rb

@@ -0,0 +1,102 @@
+# frozen_string_literal: true
+
+require "erb"
+
+module Hanami
+  module RSpec
+    module Generators
+      # @since 2.1.0
+      # @api private
+      class Part
+        # @since 2.1.0
+        # @api private
+        def initialize(fs:, inflector:)
+          @fs = fs
+          @inflector = inflector
+        end
+
+        # @since 2.1.0
+        # @api private
+        def call(app, slice, name, context: Hanami::CLI::Generators::App::PartContext.new(inflector, app, slice, name))
+          if slice
+            generate_for_slice(slice, context)
+          else
+            generate_for_app(context)
+          end
+        end
+
+        private
+
+        # @since 2.1.0
+        # @api private
+        def generate_for_slice(slice, context)
+          generate_base_part_for_app(context)
+          generate_base_part_for_slice(context, slice)
+
+          fs.write(
+            "spec/slices/#{slice}/views/parts/#{context.underscored_name}_spec.rb",
+            t("part_slice_spec.erb", context)
+          )
+        end
+
+        # @since 2.1.0
+        # @api private
+        def generate_for_app(context)
+          generate_base_part_for_app(context)
+
+          fs.write(
+            "spec/views/parts/#{context.underscored_name}_spec.rb",
+            t("part_spec.erb", context)
+          )
+        end
+
+        # @since 2.1.0
+        # @api private
+        def generate_base_part_for_app(context)
+          path = fs.join("spec", "views", "part_spec.rb")
+          return if fs.exist?(path)
+
+          fs.write(
+            path,
+            t("part_base_spec.erb", context)
+          )
+        end
+
+        # @since 2.1.0
+        # @api private
+        def generate_base_part_for_slice(context, slice)
+          path = "spec/slices/#{slice}/views/part_spec.rb"
+          return if fs.exist?(path)
+
+          fs.write(
+            path,
+            t("part_slice_base_spec.erb", context)
+          )
+        end
+
+        # @since 2.1.0
+        # @api private
+        attr_reader :fs
+
+        # @since 2.1.0
+        # @api private
+        attr_reader :inflector
+
+        # @since 2.1.0
+        # @api private
+        def template(path, context)
+          require "erb"
+
+          ERB.new(
+            File.read(__dir__ + "/part/#{path}"),
+            trim_mode: "-"
+          ).result(context.ctx)
+        end
+
+        # @since 2.1.0
+        # @api private
+        alias_method :t, :template
+      end
+    end
+  end
+end

lib/hanami/rspec/generators/part/part_base_spec.erb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+RSpec.describe <%= camelized_app_name %>::Views::Part do
+<%- if ruby_omit_hash_values? -%>
+  subject { described_class.new(value:) }
+<%- else -%>
+  subject { described_class.new(value: value) }
+<%- end -%>
+  let(:value) { double("value") }
+
+  it "works" do
+    expect(subject).to be_kind_of(described_class)
+  end
+end

lib/hanami/rspec/generators/part/part_slice_base_spec.erb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+RSpec.describe <%= camelized_slice_name %>::Views::Part do
+<%- if ruby_omit_hash_values? -%>
+  subject { described_class.new(value:) }
+<%- else -%>
+  subject { described_class.new(value: value) }
+<%- end -%>
+  let(:value) { double("value") }
+
+  it "works" do
+    expect(subject).to be_kind_of(described_class)
+  end
+end

lib/hanami/rspec/generators/part/part_slice_spec.erb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+RSpec.describe <%= camelized_slice_name %>::Views::Parts::<%= camelized_name %> do
+<%- if ruby_omit_hash_values? -%>
+  subject { described_class.new(value:) }
+<%- else -%>
+  subject { described_class.new(value: value) }
+<%- end -%>
+  let(:value) { double("<%= underscored_name %>") }
+
+  it "works" do
+    expect(subject).to be_kind_of(described_class)
+  end
+end

lib/hanami/rspec/generators/part/part_spec.erb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+RSpec.describe <%= camelized_app_name %>::Views::Parts::<%= camelized_name %> do
+<%- if ruby_omit_hash_values? -%>
+  subject { described_class.new(value:) }
+<%- else -%>
+  subject { described_class.new(value: value) }
+<%- end -%>
+  let(:value) { double("<%= underscored_name %>") }
+
+  it "works" do
+    expect(subject).to be_kind_of(described_class)
+  end
+end

spec/spec_helper.rb

@@ -1,6 +1,9 @@
 # frozen_string_literal: true
 
 require "hanami/rspec"
+require "fileutils"
+
+TMP = File.join(Dir.pwd, "tmp")
 
 RSpec.configure do |config|
   config.expect_with :rspec do |expectations|
@@ -11,6 +14,10 @@
     mocks.verify_partial_doubles = true
   end
 
+  config.after do
+    FileUtils.rm_rf(TMP) if File.directory?(TMP)
+  end
+
   config.shared_context_metadata_behavior = :apply_to_host_groups
 
   config.filter_run_when_matching :focus
@@ -28,5 +35,3 @@
 
   Kernel.srand config.seed
 end
-
-TMP = File.join(Dir.pwd, "tmp")