Basic specs for autoloading

spec/runtime/autoload_spec.rb

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+require "spec_helper"
+
+describe "Bundler.autoload" do
+  before :each do
+    build_lib "one", "1.0.0" do |s|
+      s.write "lib/baz.rb", "module Baz; end"
+      s.write "lib/qux.rb", "module Qux; end"
+    end
+
+    build_lib "two", "1.0.0" do |s|
+      s.write "lib/two.rb", "module Two; end"
+      s.add_dependency "three", "= 1.0.0"
+    end
+
+    build_lib "three", "1.0.0" do |s|
+      s.write "lib/three.rb", "module Three; end"
+      s.add_dependency "seven", "= 1.0.0"
+    end
+
+    build_lib "four", "1.0.0" do |s|
+      s.write "lib/four.rb", "module Four; end; puts 'four'"
+    end
+
+    build_lib "five", "1.0.0", :no_default => true do |s|
+      s.write "lib/mofive.rb", "module Five; end"
+    end
+
+    build_lib "six", "1.0.0" do |s|
+      s.write "lib/six.rb", "module Six; end"
+    end
+
+    build_lib "seven", "1.0.0" do |s|
+      s.write "lib/seven.rb", "module Seven; end"
+    end
+
+    build_lib "eight", "1.0.0" do |s|
+      s.write "lib/ate.rb", "module Eight; end"
+    end
+
+    gemfile <<-G
+      path "#{lib_path}"
+      gem "one", :group => :bar, :autoload => %w(Baz Qux), :require => %w(baz qux)
+      gem "two"
+      gem "three", :group => :not
+      gem "four", :autoload => false, :require => false
+      gem "five"
+      gem "six", :group => "string"
+      gem "seven", :group => :not
+      gem "eight", :require => 'ate', :group => :gate
+    G
+  end
+
+  def run_and_load_all(command)
+    run %Q{
+      #{command};
+      
+      loaded = []
+      [:Baz, :Qux, :Two, :Three, :Four, :Five, :Six, :Seven, :Eight].each do |sym|
+        begin
+          loaded << Object.const_get(sym)
+        rescue
+        end
+      end
+      
+      puts loaded
+    }
+  end
+
+  it "sets the gems up to autoload in the same manner that require does" do
+    # default group
+    run_and_load_all "Bundler.autoload"
+    check out.should == "Two"
+
+    # specific group
+    run_and_load_all "Bundler.autoload(:bar)"
+    check out.should == "Baz\nQux"
+
+    # default and specific group
+    run_and_load_all "Bundler.autoload(:default, :bar)"
+    check out.should == "Baz\nQux\nTwo"
+
+    # specific group given as a string
+    run_and_load_all "Bundler.autoload('bar')"
+    check out.should == "Baz\nQux"
+
+    # specific group declared as a string
+    run_and_load_all "Bundler.autoload(:string)"
+    check out.should == "Six"
+
+    # Works even with dependencies that don't require one another
+    run_and_load_all "Bundler.autoload(:not)"
+    check out.should == "Three\nSeven"
+  end
+
+  it "allows loading gems with non standard names explicitly" do
+    run_and_load_all "Bundler.autoload(:gate)"
+    out.should == "Eight"
+  end
+
+  it "raises an exception if either an explicit or implicit require are missing" do
+    gemfile <<-G
+      path "#{lib_path}"
+      gem "two", :require => 'boom'
+      gem "five", :autoload => :Fail
+    G
+
+    run <<-R
+      Bundler.autoload
+      
+      begin
+        Two
+      rescue LoadError => e
+        puts e.message
+      end
+      
+      begin
+        Five
+      rescue NameError => e
+        puts e.message
+      end
+    R
+    out.should == "no such file to load -- boom\nuninitialized constant Object::Five"
+  end
+
+  it "should require gems that are autoload: false, but not require: false" do
+    gemfile <<-G
+      path "#{lib_path}"
+      gem "two",  :autoload => false, :require => false
+      gem "four", :autoload => false
+    G
+
+    run 'Bundler.autoload'
+    check out.should == 'four'
+  end
+
+end