Use and enforce the new rspec #expect syntax

spec/spec_helper.rb

@@ -121,4 +121,10 @@ def call(request)
 include Substation
 
 RSpec.configure do |config|
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+  config.mock_with :rspec do |c|
+    c.syntax = :expect
+  end
 end

spec/unit/substation/action/call_spec.rb

@@ -21,7 +21,7 @@
     let(:observers) { [ Spec::Observer ] }
 
     before do
-      Spec::Observer.should_receive(:call).with(response)
+      expect(Spec::Observer).to receive(:call).with(response)
     end
 
     it { should eql(response) }

spec/unit/substation/chain/dsl/builder/class_methods/call_spec.rb

@@ -11,8 +11,8 @@
   let(:dsl)     { double }
 
   before do
-    described_class.should_receive(:new).with(registry).and_return(builder)
-    builder.should_receive(:dsl).and_return(dsl)
+    expect(described_class).to receive(:new).with(registry).and_return(builder)
+    expect(builder).to receive(:dsl).and_return(dsl)
   end
 
   it { should be(dsl) }

spec/unit/substation/chain/each_spec.rb

@@ -11,14 +11,14 @@
   let(:yields)     { [] }
 
   before do
-    object.should be_instance_of(described_class)
+    expect(object).to be_instance_of(described_class)
   end
 
   it_should_behave_like 'an #each method'
 
   it 'yields only processors' do
     subject
-    yields.each { |processor| processor.should be_instance_of(Spec::Processor) }
+    yields.each { |processor| expect(processor).to be_instance_of(Spec::Processor) }
   end
 
   it 'yields only processors with the expected handler' do
@@ -35,7 +35,7 @@
   let(:processor)  { Spec::FAKE_PROCESSOR }
 
   before do
-    subject.should be_instance_of(described_class)
+    expect(subject).to be_instance_of(described_class)
   end
 
   it { should be_kind_of(Enumerable) }