[ADDED] Added prepare step for elixir projects

[#153201654]

Signed-off-by: Shane Lattanzio <[email protected]>

lib/license_finder/package_managers/mix.rb

@@ -21,6 +21,10 @@ def self.package_management_command
       'mix'
     end
 
+    def self.prepare_command
+      'mix deps.get'
+    end
+
     private
 
     def mix_output

spec/lib/license_finder/package_managers/mix_spec.rb

@@ -73,5 +73,12 @@ module LicenseFinder
         expect(current_packages.map(&:install_path)).to eq([Pathname('foo/fs'), Pathname('foo/gettext'), Pathname('foo/uuid-refknown'), Pathname('foo/uuid')])
       end
     end
+
+    describe '.prepare_command' do
+      it 'returns the correct prepare method' do
+        expect(described_class.prepare_command).to eq('mix deps.get')
+      end
+    end
+
   end
 end