test: add cli and end-to-end integration tests

test/test_cli.rb

@@ -0,0 +1,95 @@
+require 'minitest/autorun'
+require 'prism'
+require 'tmpdir'
+require 'fileutils'
+
+class CliTest < Minitest::Test
+  def setup
+    @workdir = Dir.mktmpdir('prism-cli')
+    @cli = Prism::Cli.new(@workdir)
+  end
+
+  def teardown
+    FileUtils.remove_entry(@workdir)
+  end
+
+  def test_new_app_scaffolds_expected_files
+    app_dir = @cli.new_app('blog')
+    assert File.directory?(File.join(app_dir, 'app', 'controllers'))
+    assert File.directory?(File.join(app_dir, 'app', 'models'))
+    assert File.directory?(File.join(app_dir, 'db', 'migrate'))
+    assert File.file?(File.join(app_dir, 'app.rb'))
+    assert File.file?(File.join(app_dir, 'config.ru'))
+    assert File.file?(File.join(app_dir, 'app', 'views', 'layouts', 'application.erb'))
+    assert File.executable?(File.join(app_dir, 'bin', 'server'))
+  end
+
+  def test_new_app_boot_file_references_app_class
+    app_dir = @cli.new_app('blog')
+    content = File.read(File.join(app_dir, 'app.rb'))
+    assert_includes content, 'class Blog < Prism::Application'
+  end
+
+  def test_new_app_refuses_to_overwrite_existing_directory
+    @cli.new_app('blog')
+    assert_raises(Prism::Cli::UsageError) { @cli.new_app('blog') }
+  end
+
+  def test_generate_migration_for_create_table
+    path = @cli.generate_migration('create_posts', ['title:string', 'body:text'])
+    content = File.read(path)
+    assert_includes content, 'class CreatePosts < Prism::Orm::Migration'
+    assert_includes content, 'create_table :posts do |t|'
+    assert_includes content, 't.string :title'
+    assert_includes content, 't.text :body'
+    assert_includes content, 't.timestamps'
+    assert_includes content, 'drop_table :posts'
+  end
+
+  def test_generate_migration_filename_has_version_prefix
+    path = @cli.generate_migration('create_posts', [])
+    assert_match(/\A\d{14}_create_posts\.rb\z/, File.basename(path))
+  end
+
+  def test_generate_migration_avoids_version_collisions_within_the_same_second
+    first = @cli.generate_migration('create_posts', [])
+    second = @cli.generate_migration('create_comments', [])
+    first_version = File.basename(first).split('_', 2).first
+    second_version = File.basename(second).split('_', 2).first
+    refute_equal first_version, second_version
+  end
+
+  def test_generated_migration_actually_runs
+    path = @cli.generate_migration('create_widgets', ['name:string'])
+    store = Prism::Orm::Store.new(File.join(@workdir, 'test.pstore'))
+    Prism::Orm::Migrator.new(store, File.dirname(path)).migrate!
+    assert store.table_exists?(:widgets)
+    assert_includes store.columns(:widgets), 'name'
+  end
+
+  def test_generate_model_creates_model_and_migration
+    model_path, migration_path = @cli.generate_model('post', ['title:string'])
+    assert_includes File.read(model_path), 'class Post < Prism::Orm::Model'
+    assert_includes File.read(migration_path), 'create_table :posts do |t|'
+  end
+
+  def test_bin_prism_new_via_subprocess
+    lib_dir = File.expand_path('../lib', __dir__)
+    bin_path = File.expand_path('../bin/prism', __dir__)
+    ruby = File.join(RbConfig::CONFIG['bindir'], RbConfig::CONFIG['ruby_install_name'])
+    output = IO.popen([ruby, "-I#{lib_dir}", bin_path, 'new', 'shop'], chdir: @workdir, err: [:child, :out], &:read)
+    status = $?.exitstatus
+    assert_equal 0, status, output
+    assert File.file?(File.join(@workdir, 'shop', 'app.rb'))
+  end
+
+  def test_bin_prism_reports_usage_error_and_nonzero_exit
+    lib_dir = File.expand_path('../lib', __dir__)
+    bin_path = File.expand_path('../bin/prism', __dir__)
+    ruby = File.join(RbConfig::CONFIG['bindir'], RbConfig::CONFIG['ruby_install_name'])
+    output = IO.popen([ruby, "-I#{lib_dir}", bin_path, 'bogus'], chdir: @workdir, err: [:child, :out], &:read)
+    status = $?.exitstatus
+    refute_equal 0, status
+    assert_includes output, 'unknown command'
+  end
+end