Improve Test spec:

* Use attributes readers instead of instance_eval;
* Refactor.

spec/producer/core/test_spec.rb

@@ -8,32 +8,26 @@ module Producer::Core
 
     describe '#initialize' do
       it 'assigns the env' do
-        expect(test.instance_eval { @env }).to be env
+        expect(test.env).to be env
       end
 
       it 'assigns the arguments' do
-        expect(test.instance_eval { @arguments }).to eq arguments
+        expect(test.arguments).to eq arguments
       end
 
       it 'assigns negated as false by default' do
-        expect(test.instance_eval { @negated }).to be false
+        expect(test).to_not be_negated
       end
 
       context 'when negated option is true' do
-        subject(:test) { Test.new(env, *arguments, negated: true) }
+        subject(:test) { described_class.new(env, *arguments, negated: true) }
 
         it 'assigns negated as true' do
-          expect(test.instance_eval { @negated }).to be true
+          expect(test).to be_negated
         end
       end
     end
 
-    describe '#env' do
-      it 'returns the assigned env' do
-        expect(test.env).to be env
-      end
-    end
-
     describe '#remote' do
       it 'returns env remote' do
         expect(test.remote).to be test.env.remote
@@ -46,19 +40,13 @@ module Producer::Core
       end
     end
 
-    describe '#arguments' do
-      it 'returns the assigned arguments' do
-        expect(test.arguments).to eq arguments
-      end
-    end
-
     describe '#negated?' do
       it 'returns false' do
         expect(test.negated?).to be false
       end
 
       context 'when test is negated' do
-        subject(:test) { Test.new(env, *arguments, negated: true) }
+        subject(:test) { described_class.new(env, *arguments, negated: true) }
 
         it 'returns true' do
           expect(test.negated?).to be true
@@ -78,7 +66,7 @@ module Producer::Core
       end
 
       context 'when test is negated' do
-        subject(:test) { Test.new(env, *arguments, negated: true) }
+        subject(:test) { described_class.new(env, *arguments, negated: true) }
 
         it 'returns false when #verify is true' do
           allow(test).to receive(:verify) { true }