Extract task DSL code and spec

spec/producer/core/task/dsl_spec.rb

@@ -0,0 +1,39 @@
+require 'spec_helper'
+
+module Producer::Core
+  describe Task::DSL do
+    subject(:dsl) { Task::DSL.new &block }
+
+    describe '#initialize' do
+      let(:block) { Proc.new { raise 'error from task' } }
+
+      it 'evaluates its block' do
+        expect { dsl }.to raise_error(RuntimeError, 'error from task')
+      end
+    end
+
+    describe '#condition' do
+      context 'condition is met (block evals to true)' do
+        let(:block) { Proc.new {
+          condition { true }
+          raise 'error after condition'
+        } }
+
+        it 'evaluates all the block' do
+          expect { dsl }.to raise_error(RuntimeError, 'error after condition')
+        end
+      end
+
+      context 'condition is not met (block evals to false)' do
+        let(:block) { Proc.new {
+          condition { false }
+          raise
+        } }
+
+        it 'stops block evaluation' do
+          expect { dsl }.not_to raise_error
+        end
+      end
+    end
+  end
+end