Refactor and test boot.rb. Include tests from and closes #9834.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7998 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 145 insertions, 0 deletions

diff --git a/railties/test/boot_test.rb b/railties/test/boot_test.rb
new file mode 100644
index 0000000000..5d5fb09b41
--- /dev/null
+++ b/railties/test/boot_test.rb
@@ -0,0 +1,145 @@
+require "#{File.dirname(__FILE__)}/abstract_unit"
+require 'initializer'
+require "#{File.dirname(__FILE__)}/../environments/boot"
+
+uses_mocha 'boot tests' do
+
+class BootTest < Test::Unit::TestCase
+  def test_boot_returns_if_booted
+    Rails.expects(:booted?).returns(true)
+    Rails.expects(:pick_boot).never
+    assert_nil Rails.boot!
+  end
+
+  def test_boot_picks_and_runs_if_not_booted
+    Rails.expects(:booted?).returns(false)
+    Rails.expects(:pick_boot).returns(mock(:run => 'result'))
+    assert_equal 'result', Rails.boot!
+  end
+
+  def test_boot_vendor_rails_by_default
+    Rails.expects(:booted?).returns(false)
+    File.expects(:exist?).with("#{RAILS_ROOT}/vendor/rails").returns(true)
+    Rails::VendorBoot.any_instance.expects(:run).returns('result')
+    assert_equal 'result', Rails.boot!
+  end
+
+  def test_boot_gem_rails_otherwise
+    Rails.expects(:booted?).returns(false)
+    File.expects(:exist?).with("#{RAILS_ROOT}/vendor/rails").returns(false)
+    Rails::GemBoot.any_instance.expects(:run).returns('result')
+    assert_equal 'result', Rails.boot!
+  end
+
+  def test_run_loads_initializer_and_sets_load_path
+    boot = Rails::Boot.new
+    boot.expects(:load_initializer)
+    Rails::Initializer.expects(:run).with(:set_load_path)
+    boot.run
+  end
+end
+
+class VendorBootTest < Test::Unit::TestCase
+  include Rails
+
+  def test_load_initializer_requires_from_vendor_rails
+    boot = VendorBoot.new
+    boot.expects(:require).with("#{RAILS_ROOT}/vendor/rails/railties/lib/initializer")
+    boot.load_initializer
+  end
+end
+
+class GemBootTest < Test::Unit::TestCase
+  include Rails
+
+  def test_load_initializer_loads_rubygems_and_the_rails_gem
+    boot = GemBoot.new
+    GemBoot.expects(:load_rubygems)
+    boot.expects(:load_rails_gem)
+    boot.expects(:require).with('initializer')
+    boot.load_initializer
+  end
+
+  def test_load_rubygems_exits_with_error_if_missing
+    GemBoot.expects(:require).with('rubygems').raises(LoadError, 'missing rubygems')
+    STDERR.expects(:puts)
+    GemBoot.expects(:exit).with(1)
+    GemBoot.load_rubygems
+  end
+
+  def test_load_rubygems_exits_with_error_if_too_old
+    GemBoot.stubs(:rubygems_version).returns('0.0.1')
+    GemBoot.expects(:require).with('rubygems').returns(true)
+    STDERR.expects(:puts)
+    GemBoot.expects(:exit).with(1)
+    GemBoot.load_rubygems
+  end
+
+  def test_load_rails_gem_activates_specific_gem_if_version_given
+    GemBoot.stubs(:gem_version).returns('0.0.1')
+
+    boot = GemBoot.new
+    boot.expects(:gem).with('rails', '=0.0.1')
+    boot.load_rails_gem
+  end
+
+  def test_load_rails_gem_activates_latest_gem_if_no_version_given
+    GemBoot.stubs(:gem_version).returns(nil)
+
+    boot = GemBoot.new
+    boot.expects(:gem).with('rails')
+    boot.load_rails_gem
+  end
+
+  def test_load_rails_gem_exits_with_error_if_missing
+    GemBoot.stubs(:gem_version).returns('0.0.1')
+
+    boot = GemBoot.new
+    boot.expects(:gem).with('rails', '=0.0.1').raises(Gem::LoadError, 'missing rails 0.0.1 gem')
+    STDERR.expects(:puts)
+    boot.expects(:exit).with(1)
+    boot.load_rails_gem
+  end
+end
+
+end # uses_mocha
+
+
+class ParseGemVersionTest < Test::Unit::TestCase
+  def test_should_return_nil_if_no_lines_are_passed
+    assert_equal nil, parse('')
+    assert_equal nil, parse(nil)
+  end
+
+  def test_should_return_nil_if_no_lines_match
+    assert_equal nil, parse('nothing matches on this line\nor on this line')
+  end
+
+  def test_should_parse_with_no_leading_space
+    assert_equal "1.2.3", parse("RAILS_GEM_VERSION = '1.2.3' unless defined? RAILS_GEM_VERSION")
+    assert_equal "1.2.3", parse("RAILS_GEM_VERSION = '1.2.3'")
+  end
+
+  def test_should_parse_with_any_number_of_leading_spaces
+    assert_equal nil, parse([])
+    assert_equal "1.2.3", parse(" RAILS_GEM_VERSION = '1.2.3' unless defined? RAILS_GEM_VERSION")
+    assert_equal "1.2.3", parse("   RAILS_GEM_VERSION = '1.2.3' unless defined? RAILS_GEM_VERSION")
+    assert_equal "1.2.3", parse(" RAILS_GEM_VERSION = '1.2.3'")
+    assert_equal "1.2.3", parse("   RAILS_GEM_VERSION = '1.2.3'")
+  end
+
+  def test_should_ignore_unrelated_comments
+    assert_equal "1.2.3", parse("# comment\nRAILS_GEM_VERSION = '1.2.3'\n# comment")
+  end
+
+  def test_should_ignore_commented_version_lines
+    assert_equal "1.2.3", parse("#RAILS_GEM_VERSION = '9.8.7'\nRAILS_GEM_VERSION = '1.2.3'")
+    assert_equal "1.2.3", parse("# RAILS_GEM_VERSION = '9.8.7'\nRAILS_GEM_VERSION = '1.2.3'")
+    assert_equal "1.2.3", parse("RAILS_GEM_VERSION = '1.2.3'\n# RAILS_GEM_VERSION = '9.8.7'")
+  end
+
+  private
+    def parse(text)
+      Rails::GemBoot.parse_gem_version(text)
+    end
+end