Convert builder tests to use rspec "subjects"

test/unit/vagrant/action/builder_test.rb

@@ -2,7 +2,6 @@ require File.expand_path("../../../base", __FILE__)
 
 describe Vagrant::Action::Builder do
   let(:data) { { :data => [] } }
-  let(:instance) { described_class.new }
 
   # This returns a proc that can be used with the builder
   # that simply appends data to an array in the env.
@@ -15,8 +14,8 @@ describe Vagrant::Action::Builder do
       data = {}
       proc = Proc.new { |env| env[:data] = true }
 
-      instance = described_class.build(proc)
-      instance.call(data)
+      subject = described_class.build(proc)
+      subject.call(data)
 
       data[:data].should == true
     end
@@ -27,8 +26,8 @@ describe Vagrant::Action::Builder do
       data = {}
       proc = Proc.new { |env| env[:data] = true }
 
-      instance.use proc
-      instance.call(data)
+      subject.use proc
+      subject.call(data)
 
       data[:data].should == true
     end
@@ -38,9 +37,9 @@ describe Vagrant::Action::Builder do
       proc1 = Proc.new { |env| env[:one] = true }
       proc2 = Proc.new { |env| env[:two] = true }
 
-      instance.use proc1
-      instance.use proc2
-      instance.call(data)
+      subject.use proc1
+      subject.use proc2
+      subject.call(data)
 
       data[:one].should == true
       data[:two].should == true
@@ -66,9 +65,9 @@ describe Vagrant::Action::Builder do
 
   context "inserting" do
     it "can insert at an index" do
-      instance.use appender_proc(1)
-      instance.insert(0, appender_proc(2))
-      instance.call(data)
+      subject.use appender_proc(1)
+      subject.insert(0, appender_proc(2))
+      subject.call(data)
 
       data[:data].should == [2, 1]
     end
@@ -78,48 +77,48 @@ describe Vagrant::Action::Builder do
       bar_proc = appender_proc(2)
       def bar_proc.name; :bar; end
 
-      instance.use appender_proc(1)
-      instance.use bar_proc
-      instance.insert_before :bar, appender_proc(3)
-      instance.call(data)
+      subject.use appender_proc(1)
+      subject.use bar_proc
+      subject.insert_before :bar, appender_proc(3)
+      subject.call(data)
 
       data[:data].should == [1, 3, 2]
     end
 
     it "can insert next to a previous object" do
       proc2 = appender_proc(2)
-      instance.use appender_proc(1)
-      instance.use proc2
-      instance.insert(proc2, appender_proc(3))
-      instance.call(data)
+      subject.use appender_proc(1)
+      subject.use proc2
+      subject.insert(proc2, appender_proc(3))
+      subject.call(data)
 
       data[:data].should == [1, 3, 2]
     end
 
     it "can insert before" do
-      instance.use appender_proc(1)
-      instance.insert_before 0, appender_proc(2)
-      instance.call(data)
+      subject.use appender_proc(1)
+      subject.insert_before 0, appender_proc(2)
+      subject.call(data)
 
       data[:data].should == [2, 1]
     end
 
     it "can insert after" do
-      instance.use appender_proc(1)
-      instance.use appender_proc(3)
-      instance.insert_after 0, appender_proc(2)
-      instance.call(data)
+      subject.use appender_proc(1)
+      subject.use appender_proc(3)
+      subject.insert_after 0, appender_proc(2)
+      subject.call(data)
 
       data[:data].should == [1, 2, 3]
     end
 
     it "raises an exception if an invalid object given for insert" do
-      expect { instance.insert "object", appender_proc(1) }.
+      expect { subject.insert "object", appender_proc(1) }.
         to raise_error(RuntimeError)
     end
 
     it "raises an exception if an invalid object given for insert_after" do
-      expect { instance.insert_after "object", appender_proc(1) }.
+      expect { subject.insert_after "object", appender_proc(1) }.
         to raise_error(RuntimeError)
     end
   end
@@ -129,9 +128,9 @@ describe Vagrant::Action::Builder do
       proc1 = appender_proc(1)
       proc2 = appender_proc(2)
 
-      instance.use proc1
-      instance.replace proc1, proc2
-      instance.call(data)
+      subject.use proc1
+      subject.replace proc1, proc2
+      subject.call(data)
 
       data[:data].should == [2]
     end
@@ -140,9 +139,9 @@ describe Vagrant::Action::Builder do
       proc1 = appender_proc(1)
       proc2 = appender_proc(2)
 
-      instance.use proc1
-      instance.replace 0, proc2
-      instance.call(data)
+      subject.use proc1
+      subject.replace 0, proc2
+      subject.call(data)
 
       data[:data].should == [2]
     end
@@ -152,10 +151,10 @@ describe Vagrant::Action::Builder do
     it "can delete by object" do
       proc1 = appender_proc(1)
 
-      instance.use proc1
-      instance.use appender_proc(2)
-      instance.delete proc1
-      instance.call(data)
+      subject.use proc1
+      subject.use appender_proc(2)
+      subject.delete proc1
+      subject.call(data)
 
       data[:data].should == [2]
     end
@@ -163,10 +162,10 @@ describe Vagrant::Action::Builder do
     it "can delete by index" do
       proc1 = appender_proc(1)
 
-      instance.use proc1
-      instance.use appender_proc(2)
-      instance.delete 0
-      instance.call(data)
+      subject.use proc1
+      subject.use appender_proc(2)
+      subject.delete 0
+      subject.call(data)
 
       data[:data].should == [2]
     end