spec/shared/adapter.rb in multi_mime-0.0.2 vs spec/shared/adapter.rb in multi_mime-0.0.3

@@ -1,77 +1,71 @@
-shared_examples_for "an adapter" do |adapter|
+shared_examples_for 'an adapter' do |desired_adapter|
 
-  before do
-    begin
-      MultiMime.use adapter
-    rescue LoadError
-      pending "Adapter #{adapter} couldn't be loaded (not installed?)"
-    end
+  around do |example|
+    desired_constants = MultiMime::REQUIREMENT_MAP.select { |adapter, library, clazz| adapter != desired_adapter }.map { |adapter, library, clazz| clazz }
+    undefine_constants(*desired_constants) { example.call }
+    MultiMime.reset_adapter
   end
 
   describe :type_for do
 
     context :with_correct_mime_type do
-      subject { MultiMime.type_for("text/html") }
-      it { should eq "text/html" }
+      subject { MultiMime.type_for('text/html') }
+      it { should eq 'text/html' }
     end
 
     context :with_incorrect_mime_type do
-      subject { MultiMime.type_for("foo/bar") }
+      subject { MultiMime.type_for('foo/bar') }
       it { should be_nil }
       it { should be_a MultiMime::NullType }
     end
 
   end
 
   describe :type_for_extension do
 
     context :without_dot do
-      subject { MultiMime.type_for_extension("html") }
-      it { should eq "text/html" }
+      subject { MultiMime.type_for_extension('html') }
+      it { should eq 'text/html' }
     end
 
     context :with_dot do
-      subject { MultiMime.type_for_extension(".html") }
-      it { should eq "text/html" }
+      subject { MultiMime.type_for_extension('.html') }
+      it { should eq 'text/html' }
     end
 
     context :unknown_extension do
-      subject { MultiMime.type_for_extension(".foo.bar") }
+      subject { MultiMime.type_for_extension('.foo.bar') }
       it { should be_nil }
       it { should be_a MultiMime::NullType }
     end
 
   end
 
   describe :type_for_path do
 
     context :known_extension do
-      subject { MultiMime.type_for_path("/usr/local/foo/bar.html") }
-      it { should eq "text/html" }
+      subject { MultiMime.type_for_path('/usr/local/foo/bar.html') }
+      it { should eq 'text/html' }
     end
 
     context :unknown_extension do
-      subject { MultiMime.type_for_path("/usr/local/foo/bar.foo") }
+      subject { MultiMime.type_for_path('/usr/local/foo/bar.foo') }
       it { should be_nil }
       it { should be_a MultiMime::NullType }
     end
 
   end
 
-  describe :type_for_file, :fakefs => true do
+  describe :type_for_file, fakefs: true do
 
-    let(:extension_file) {
-      File.open("foo.html", "w")
-    }
-    let(:extensionless_file) {
-      File.open("foo", "w")
-    }
+    let(:extension_file) { File.open('foo.html', 'w') }
+    let(:extensionless_file) { File.open('foo', 'w') }
 
     context :extension_file do
       subject { MultiMime.type_for_file(extension_file) }
-      it { should eq "text/html" }
+      it { should eq 'text/html' }
     end
 
     context :extensionless_file do
       subject { MultiMime.type_for_file(extensionless_file) }
       it { should be_nil }
@@ -82,20 +76,19 @@
 
   describe :null_type do
 
     context :with_incorrect_mime_type do
 
-      it "should'nt raise an exception when querying for formats" do
-        mime = MultiMime.type_for("foo/bar")
+      it 'should\'nt raise an exception when querying for formats' do
+        mime = MultiMime.type_for('foo/bar')
         expect(mime).to be_nil
         expect(mime).to be_a MultiMime::NullType
         expect(mime.html?).to be false
         expect(mime.xml?).to be false
         expect(mime.json?).to be false
       end
 
     end
 
-
   end
 
-end
\ No newline at end of file
+end