(PDK-429) Fix --tests to pass through to unit test handler.

lib/pdk/tests/unit.rb

@@ -6,9 +6,10 @@
 module PDK
   module Test
     class Unit
-      def self.cmd(_tests, opts = {})
-        # TODO: test selection
-        opts.key?(:parallel) ? 'parallel_spec' : 'spec'
+      def self.cmd(tests, opts = {})
+        rake_args = opts.key?(:parallel) ? 'parallel_spec' : 'spec'
+        rake_args += "[#{tests}]" unless tests.nil?
+        rake_args
       end
 
       def self.rake_bin

spec/unit/pdk/cli/test/unit_spec.rb

@@ -112,6 +112,22 @@
             }
           end
         end
+
+        context 'with specific tests passed in' do
+          let(:tests) { '/path/to/file1,/path/to/file2' }
+
+          before(:each) do
+            expect(PDK::CLI::Util::OptionValidator).to receive(:comma_separated_list?).with(tests).and_return(true)
+          end
+
+          it do
+            expect {
+              test_unit_cmd.run_this(["--tests=#{tests}"])
+            }.to raise_error(SystemExit) { |e|
+              expect(e.status).to eq 0
+            }
+          end
+        end
       end
 
       context 'when tests fail' do

spec/unit/pdk/test/unit_spec.rb

@@ -153,6 +153,14 @@
         expect(cmd).to eq('spec')
       end
     end
+
+    context 'when run with tests option' do
+      it 'passes file paths to rake' do
+        cmd = described_class.cmd('/path/to/test1,/path/to/test2')
+
+        expect(cmd).to eq('spec[/path/to/test1,/path/to/test2]')
+      end
+    end
   end
 
   describe '.parse_output' do