```ruby
require 'spec_helper'
require 'rspec/core/formatters/progress_formatter'

describe RSpec::Core::Formatters::ProgressFormatter do

   before do
     @output = StringIO.new
     @formatter = RSpec::Core::Formatters::ProgressFormatter.new(@output)
     @formatter.start(2)
     @formatter.stub!(:color_enabled?).and_return(false)
   end

   it "produces line break on start dump" do
     @formatter.start_dump
     expect(@output.string).to eq("\n")
   end

   it "produces standard summary without pending when pending has a 0 count" do
     @formatter.start_dump
     @formatter.dump_summary(0.00001, 2, 0, 0)
     expect(@output.string).to match /2 examples, 0 failures/i
     expect(@output.string).not_to match /0 pending/i
   end

   it "pushes nothing on start" do
     @formatter.start(4)
     expect(@output.string).to eq("")
   end

end
```

Address deprecation warning from rspec-mocks.
user
```ruby
require 'spec_helper'
require 'rspec/core/formatters/progress_formatter'

describe RSpec::Core::Formatters::ProgressFormatter do

   before do
     @output = StringIO.new
     @formatter = RSpec::Core::Formatters::ProgressFormatter.new(@output)
     @formatter.start(2)
     @formatter.stub(:color_enabled?).and_return(false)
   end

   it "produces line break on start dump" do
     @formatter.start_dump
     expect(@output.string).to eq("\n")
   end

   it "produces standard summary without pending when pending has a 0 count" do
     @formatter.start_dump
     @formatter.dump_summary(0.00001, 2, 0, 0)
     expect(@output.string).to match /2 examples, 0 failures/i
     expect(@output.string).not_to match /0 pending/i
   end

   it "pushes nothing on start" do
     @formatter.start(4)
     expect(@output.string).to eq("")
   end

end
```
assistant