[BUG] Allow dossier.yml to override database name

lib/dossier/connection_url.rb

@@ -17,7 +17,7 @@ def to_hash
         password: uri.password,
         host:     uri.host,
         port:     uri.port,
-        database: File.basename(uri.path)
+        database: database_name
       }.merge(params).reject { |k,v| v.nil? }
     end
 
@@ -32,5 +32,13 @@ def params
       Rack::Utils.parse_nested_query(uri.query).symbolize_keys
     end
 
+    def database_name
+      path = File.basename(uri.path)
+      if path.blank? || path == "/"
+        nil
+      else
+        path
+      end
+    end
   end
 end

spec/dossier/connection_url_spec.rb

@@ -42,4 +42,15 @@
     expect(connection_options.slice(:username, :password, :port)).to be_empty
   end
 
+  it "drops blank database name" do
+    database_url  = "postgresql://localhost"
+    connection_options = described_class.new(database_url).to_hash
+    expect(connection_options.slice(:database)).to be_empty
+  end
+
+  it "drops trailing slash database name" do
+    database_url  = "postgresql://localhost/"
+    connection_options = described_class.new(database_url).to_hash
+    expect(connection_options.slice(:database)).to be_empty
+  end
 end