Add test for generator

spec/command/generate_spec.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+require "pathname"
+require "rake"
+
+GEM_ROOT_PATH = Pathname.new(Dir.pwd)
+GEM_TEMP_PATH = GEM_ROOT_PATH.join("tmp")
+GENERATOR_PLAYGROUND_PATH = GEM_TEMP_PATH.join("sample-project")
+CONTROLPLANE_CONFIG_DIR_PATH = GENERATOR_PLAYGROUND_PATH.join(".controlplane")
+CPL_EXECUTABLE_PATH = GEM_ROOT_PATH.join("bin", "cpl")
+
+def sh_in_dir(dir, *shell_commands)
+  shell_commands.flatten.each { |shell_command| RakeFileUtils.sh %(cd '#{dir}' && #{shell_command.strip}) }
+end
+
+describe Command::Generate do
+  before do
+    FileUtils.rm_r(GENERATOR_PLAYGROUND_PATH) if Dir.exist?(GENERATOR_PLAYGROUND_PATH)
+    FileUtils.mkdir_p GENERATOR_PLAYGROUND_PATH
+  end
+
+  after do
+    FileUtils.rm_r GENERATOR_PLAYGROUND_PATH
+  end
+
+  context "when no configuration exist in the project" do
+    it "generates base config files" do
+      command = "#{CPL_EXECUTABLE_PATH} generate"
+      sh_in_dir(GENERATOR_PLAYGROUND_PATH, command)
+
+      controlplane_config_file_path = CONTROLPLANE_CONFIG_DIR_PATH.join("controlplane.yml")
+      expect(controlplane_config_file_path).to exist
+    end
+  end
+end