♻️ refactor rspec files (#48)

* ♻️ refactor rspec files

I will implement shared_context, shared_examples in the future.
Before that, I would like to refactor rspec files to map library
files to rspec files.

This structure is supported by rspec-mode of emacs or "rails go to
spec" plugin of vscode.

* 👍 change rspec file path

I remove lib directory for rspec to access specs easily.

spec/code_lens_spec.rb

@@ -0,0 +1,234 @@
+# typed: false
+# frozen_string_literal: true
+
+require_relative "spec_helper"
+
+RSpec.describe RubyLsp::RSpec do
+  include RubyLsp::TestHelper
+
+  let(:uri) { URI("file:///fake_spec.rb") }
+
+  describe "code lens" do
+    it "generates code lens for basic tests" do
+      source = <<~RUBY
+        RSpec.describe Foo do
+          context "when something" do
+            it "does something" do
+            end
+          end
+        end
+      RUBY
+
+      with_server(source, uri) do |server, uri|
+        server.process_message(
+          {
+            id: 1,
+            method: "textDocument/codeLens",
+            params: {
+              textDocument: { uri: uri },
+              position: { line: 0, character: 0 },
+            },
+          },
+        )
+
+        response = server.pop_response.response
+
+        expect(response.count).to eq(9)
+
+        expect(response[0].data).to eq({ type: "test", kind: :group, group_id: nil, id: 1 })
+        expect(response[1].data).to eq({ type: "test_in_terminal", kind: :group, group_id: nil, id: 1 })
+        expect(response[2].data).to eq({ type: "debug", kind: :group, group_id: nil, id: 1 })
+
+        0.upto(2) do |i|
+          expect(response[i].command.arguments).to eq([
+            "/fake_spec.rb",
+            "Foo",
+            "bundle exec rspec /fake_spec.rb:1",
+            { start_line: 0, start_column: 0, end_line: 5, end_column: 3 },
+          ])
+        end
+
+        expect(response[3].data).to eq({ type: "test", kind: :group, group_id: 1, id: 2 })
+        expect(response[4].data).to eq({ type: "test_in_terminal", kind: :group, group_id: 1, id: 2 })
+        expect(response[5].data).to eq({ type: "debug", kind: :group, group_id: 1, id: 2 })
+
+        3.upto(5) do |i|
+          expect(response[i].command.arguments).to eq([
+            "/fake_spec.rb",
+            "when something",
+            "bundle exec rspec /fake_spec.rb:2",
+            { start_line: 1, start_column: 2, end_line: 4, end_column: 5 },
+          ])
+        end
+
+        expect(response[6].data).to eq({ type: "test", kind: :example, group_id: 2 })
+        expect(response[7].data).to eq({ type: "test_in_terminal", kind: :example, group_id: 2 })
+        expect(response[8].data).to eq({ type: "debug", kind: :example, group_id: 2 })
+
+        6.upto(8) do |i|
+          expect(response[i].command.arguments).to eq([
+            "/fake_spec.rb",
+            "does something",
+            "bundle exec rspec /fake_spec.rb:3",
+            { start_line: 2, start_column: 4, end_line: 3, end_column: 7 },
+          ])
+        end
+      end
+    end
+
+    it "recognizes different example, it, and specify declarations" do
+      source = <<~RUBY
+        RSpec.describe Foo do
+          it { do_something }
+          it var1 do
+            do_something
+          end
+          specify { do_something }
+          example var2 do
+            do_something
+          end
+        end
+      RUBY
+
+      with_server(source, uri) do |server, uri|
+        server.process_message(
+          {
+            id: 1,
+            method: "textDocument/codeLens",
+            params: {
+              textDocument: { uri: uri },
+              position: { line: 0, character: 0 },
+            },
+          },
+        )
+
+        response = server.pop_response.response
+
+        expect(response.count).to eq(15)
+
+        expect(response[3].command.arguments[1]).to eq("<unnamed-1>")
+        expect(response[6].command.arguments[1]).to eq("<var1>")
+        expect(response[9].command.arguments[1]).to eq("<unnamed-2>")
+        expect(response[12].command.arguments[1]).to eq("<var2>")
+      end
+    end
+
+    it "recognizes different context and describe declarations" do
+      source = <<~RUBY
+        RSpec.describe(Foo::Bar) do
+        end
+
+        RSpec.describe Foo::Bar do
+        end
+
+        context(Foo) do
+        end
+
+        describe Foo do
+        end
+
+        context "Foo" do
+        end
+
+        describe var do
+        end
+
+        # these should bot be recognized
+        context
+        describe
+        context("foo")
+      RUBY
+
+      with_server(source, uri) do |server, uri|
+        server.process_message(
+          {
+            id: 1,
+            method: "textDocument/codeLens",
+            params: {
+              textDocument: { uri: uri },
+              position: { line: 0, character: 0 },
+            },
+          },
+        )
+
+        response = server.pop_response.response
+
+        expect(response.count).to eq(18)
+
+        expect(response[11].command.arguments[1]).to eq("Foo")
+        expect(response[13].command.arguments[1]).to eq("Foo")
+        expect(response[15].command.arguments[1]).to eq("<var>")
+      end
+    end
+
+    context "when the file is not a test file" do
+      let(:uri) { URI("file:///not_spec_file.rb") }
+
+      it "ignores file" do
+        source = <<~RUBY
+          class FooBar
+            context "when something" do
+            end
+          end
+        RUBY
+
+        with_server(source, uri) do |server, uri|
+          server.process_message(
+            {
+              id: 1,
+              method: "textDocument/codeLens",
+              params: {
+                textDocument: { uri: uri },
+                position: { line: 0, character: 0 },
+              },
+            },
+          )
+
+          response = server.pop_response.response
+
+          expect(response.count).to eq(0)
+        end
+      end
+    end
+
+    context "when there's a binstub" do
+      let(:binstub_path) { File.expand_path("../bin/rspec", __dir__) }
+
+      before do
+        File.write(binstub_path, <<~RUBY)
+          #!/usr/bin/env ruby
+          puts "binstub is called"
+        RUBY
+      end
+
+      after do
+        FileUtils.rm(binstub_path) if File.exist?(binstub_path)
+      end
+
+      it "uses the binstub" do
+        source = <<~RUBY
+          RSpec.describe(Foo::Bar) do
+          end
+        RUBY
+
+        with_server(source, uri) do |server, uri|
+          server.process_message(
+            {
+              id: 1,
+              method: "textDocument/codeLens",
+              params: {
+                textDocument: { uri: uri },
+                position: { line: 0, character: 0 },
+              },
+            },
+          )
+
+          response = server.pop_response.response
+
+          expect(response.count).to eq(3)
+          expect(response[0].command.arguments[2]).to eq("bundle exec bin/rspec /fake_spec.rb:1")
+        end
+      end
+    end
+  end
+end