map undefined scopes to the Jeeves module in test

README.md

@@ -225,6 +225,9 @@ If you're feeling reckless, you can monkey-patch Jeeves into your project with
 History
 -------
 
+### Edge
+* Mock undefined dependency scope within RSpec or Test::Unit
+
 ### Version 0.2.1
 * Import dependencies as class methods (rather than just instance methods)
 * Raise Jeeves::UnresolvedDependency when a dependency is not found

lib/jeeves.rb

@@ -32,5 +32,25 @@ def import(*args)
       end
     end
   end
+
+  def const_missing(name)
+    return super unless Jeeves.in_test_framework?
+    Module.new do
+      @name = [name]
+      class << self
+        def const_missing(name)
+          @name << name
+          self
+        end
+        def to_s
+          @name.join("::")
+        end
+      end
+    end
+  end
+
+  def self.in_test_framework?
+    defined?(RSpec) || defined?(Test::Unit)
+  end
 end
 

lib/jeeves/resolve_dependency.rb

@@ -10,16 +10,12 @@ def self.call(scope, name)
       RESOLVERS.each do |resolver|
         break if delegator = resolver.call(scope, name)
       end
-      delegator = mock(delegator, scope, name) if in_test_framework?
+      delegator = mock(delegator, scope, name) if Jeeves.in_test_framework?
       delegator or unresolved(scope, name)
     end
 
   private
 
-    def self.in_test_framework?
-      defined?(RSpec) || defined?(Test::Unit)
-    end
-
     def self.mock(delegator, scope, name)
       lambda do |*args, &block|
         if Jeeves.respond_to?(name)

spec/integration/import_spec.rb

@@ -82,10 +82,19 @@ class TestSubject
   end
 
   it "raises an error if no importers can find the dependency" do
-    Jeeves::ResolveDependency.stub(:in_test_framework?) { false } # to avoid RSpec integration
+    Jeeves.stub(:in_test_framework?) { false } # to avoid RSpec integration
     expect { subject.class.import :unknown, from: JeevesTestApp::OtherScope }.
       to raise_error(Jeeves::UnresolvedDependency,
            "Dependency 'unknown' was not found in JeevesTestApp::OtherScope")
   end
+
+  it "raises an error if the scope is undefined" do
+    Jeeves.stub(:in_test_framework?) { false } # to avoid RSpec integration
+    expect do
+      class JeevesTestApp::InnerScope::TestSubject
+        import :unknown, from: MyUndefined::Scope
+      end
+    end.to raise_error(NameError)
+  end
 end
 

spec/integration/rspec_spec.rb

@@ -9,6 +9,7 @@ def self.loaded_dependency
     class TestSubject
       extend Jeeves
       import :my_mock, :loaded_dependency
+      import :external_mock, from: MyUndefined::Scope
 
       def call
         my_mock(42)
@@ -17,6 +18,10 @@ def call
       def call_integrated
         loaded_dependency
       end
+
+      def call_external
+        external_mock
+      end
     end
   end
 end
@@ -34,13 +39,23 @@ def call_integrated
       "Dependency 'my_mock' was not found in JeevesTestApp::InnerScope")
   end
 
-  it "overrides loaded dependencies with mocked methdos on Jeeves" do
+  it "overrides loaded dependencies with mocked methods on Jeeves" do
     Jeeves.stub(:loaded_dependency) { :stubbed_value }
     subject.call_integrated.should == :stubbed_value
   end
 
   it "uses loaded dependencies if they are not mocked on Jeeves" do
     subject.call_integrated.should == :real_value
   end
+
+  it "treats missing scope as Jeeves" do
+    Jeeves.stub(:external_mock) { :stubbed_value }
+    subject.call_external.should == :stubbed_value
+  end
+
+  it "raises an error if the dependency in missing scope is not mocked" do
+    expect { subject.call_external }.to raise_error(Jeeves::UnresolvedDependency,
+      "Dependency 'external_mock' was not found in MyUndefined::Scope")
+  end
 end
 

spec/unit/resolve_dependency_spec.rb

@@ -11,7 +11,7 @@ module Jeeves
     let(:delegator) { stub("delegator") }
 
     before do
-      Jeeves::ResolveDependency.stub(:in_test_framework?) { false } # to avoid RSpec integration
+      Jeeves.stub(:in_test_framework?) { false } # to avoid RSpec integration
       ResolveMethod.stub(:call)
       ResolveCallable.stub(:call)
       ResolveConstant.stub(:call)