Add some feature tests for multiple file operations

Author: shepmaster

tests/spec/features/multi_file_editor_spec.rb

@@ -0,0 +1,91 @@
+require 'spec_helper'
+require 'support/editor'
+require 'support/file_tree'
+require 'support/matchers/editor'
+require 'support/playground_actions'
+
+RSpec.feature "Multi-file editor interaction", type: :feature, js: true do
+  include PlaygroundActions
+
+  before do
+    visit '/'
+  end
+
+  scenario "editing and running multiple files" do
+    in_config_menu { choose('multiple') }
+
+    filetree.select 'src/main.rs'
+    editor.set(<<~CODE)
+      mod utils;
+
+      fn main() {
+          println!("Hello to the whole {}", utils::greeting());
+      }
+    CODE
+
+    filetree.create_file 'src/utils.rs'
+    editor.set(<<~CODE)
+      pub fn greeting() -> &'static str {
+          "world"
+      }
+    CODE
+
+    # Verify both files retain their content
+    filetree.select 'src/main.rs'
+    expect(editor).to have_line 'mod utils;'
+    expect(editor).to_not have_line 'pub fn greeting()'
+
+    filetree.select 'src/utils.rs'
+    expect(editor).to have_line 'pub fn greeting()'
+    expect(editor).to_not have_line 'mod utils;'
+
+    # And that the files are transferred to the server
+    click_on "Run"
+
+    within(:output, :stdout) do
+      expect(page).to have_content 'Hello to the whole world'
+    end
+  end
+
+  scenario "toggling from single to multi-file view preserves contents" do
+    editor.set(<<~CODE)
+      fn main() {
+          println!("From a single file");
+      }
+    CODE
+
+    in_config_menu { choose('multiple') }
+
+    # The original code had a `main` function, so should be in main.rs
+    filetree.select 'src/main.rs'
+
+    expect(editor).to have_line 'println!("From a single file")'
+  end
+
+  scenario "toggling from multi-file to single view preserves contents" do
+    in_config_menu { choose('multiple') }
+
+    filetree.select 'src/main.rs'
+    editor.set('// Main file content')
+
+    filetree.create_file 'src/helper.rs'
+    editor.set('// Helper module content')
+
+    # Toggle back to single-file mode
+    in_config_menu { choose('single') }
+
+    # The content should be preserved
+    expect(editor).to have_line '// src/main.rs'
+    expect(editor).to have_line '// Main file content'
+    expect(editor).to have_line '// src/helper.rs'
+    expect(editor).to have_line '// Helper module content'
+  end
+
+  def editor
+    Editor.new(page)
+  end
+
+  def filetree
+    FileTree.new(page)
+  end
+end

tests/spec/features/sharing_with_others_spec.rb

@@ -1,5 +1,6 @@
 require 'spec_helper'
 require 'support/editor'
+require 'support/file_tree'
 require 'support/matchers/be_at_url'
 require 'support/playground_actions'
 
@@ -11,7 +12,9 @@
   # This test does more than one thing so we can avoid sending too
   # many requests to GitHub
   scenario "saving to a Gist" do
-    editor.set(code)
+    editor.set(<<~CODE)
+      // This code was saved by an automated test for the Rust Playground
+    CODE
 
     in_channel_menu { click_on("Nightly") }
     in_mode_menu { click_on("Release") }
@@ -47,13 +50,51 @@
     expect(urlo_link).to include('automated+test')
   end
 
+  # This test does more than one thing so we can avoid sending too
+  # many requests to GitHub
+  scenario "saving a multi-file Gist and restoring it" do
+    in_config_menu { choose('multiple') }
+
+    filetree.select 'src/main.rs'
+    editor.set(<<~CODE)
+      mod utils;
+
+      fn main() {
+          println!("{}", utils::greet());
+      }
+    CODE
+
+    filetree.create_file 'src/utils.rs'
+    editor.set(<<~CODE)
+      pub fn greet() -> &'static str {
+          "Hello from multi-file!"
+      }
+    CODE
+
+    # Save to gist
+    within(:header) { click_on 'Share' }
+
+    perma_link = find_link("Permalink to the playground")[:href]
+
+    # Navigate away so we can tell that we go back to the same page
+    visit 'about:blank'
+
+    visit perma_link
+
+    filetree.select 'src/main.rs'
+    expect(editor).to have_line 'mod utils;'
+    expect(editor).to have_line 'println!("{}", utils::greet());'
+
+    filetree.select 'src/utils.rs'
+    expect(editor).to have_line 'pub fn greet()'
+    expect(editor).to have_line '"Hello from multi-file!"'
+  end
+
   def editor
     Editor.new(page)
   end
 
-  def code
-    <<~EOF
-      // This code was saved by an automated test for the Rust Playground
-    EOF
+  def filetree
+    FileTree.new(page)
   end
 end

tests/spec/support/file_tree.rb

@@ -0,0 +1,20 @@
+class FileTree
+  attr_reader :page
+  def initialize(page)
+    @page = page
+  end
+
+  def create_file(name)
+    page.within(:filetree) do
+      page.click_on 'Create file'
+      page.fill_in 'pathname', with: name
+      page.click_on 'Create new file'
+    end
+  end
+
+  def select(name)
+    page.within(:filetree) do
+      page.click_on name
+    end
+  end
+end