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Project: Aruba

Publisher: Mark Ayers

Check if path has size

If you need to check if a given path has file size, you can use the
have_file_size-matcher. It fails if the file does not exist.

require 'spec_helper'

RSpec.describe 'Check if file has size', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:size) { 1 }

  before(:each) { write_fixed_size_file(file, size) }

  it { expect(file).to have_file_size size }
end
Background
Given
I use a fixture named "cli-app"
Scenarios
  1. Expect file of given size
  2. Expect multiple files of given size
  3. Expect a least one file of size
  4. Fails because file has different size than expected
  5. Fails if file does not exist
Expect file of given size
Given
a file named "spec/file_of_size_spec.rb" with: 
require 'spec_helper'

RSpec.describe 'Check if file has size', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:size) { 1 }

  before(:each) { write_fixed_size_file(file, size) }

  it { expect(file).to have_file_size size }
end
When
I run rspec
Then
the specs should all pass
Expect multiple files of given size
Given
a file named "spec/file_of_size_spec.rb" with: 
require 'spec_helper'

RSpec.describe 'Check if file has size', :type => :aruba do
  let(:files) { %w(file1.txt file2.txt) }
  let(:size) { 1 }

  before :each do
    files.each { |f| write_fixed_size_file(f, size) }
  end

  it { expect(files).to all have_file_size size }
end
When
I run rspec
Then
the specs should all pass
Expect a least one file of size
Given
a file named "spec/file_of_size_spec.rb" with: 
require 'spec_helper'

RSpec.describe 'Check if file has size', :type => :aruba do
  let(:files) { %w(file1.txt file2.txt) }
  let(:size) { 1 }

  before :each do
    write_fixed_size_file(files.first, size)
  end

  it { expect(files).to include a_file_of_size size }
end
When
I run rspec
Then
the specs should all pass
Fails because file has different size than expected
Given
a file named "spec/file_of_size_spec.rb" with: 
require 'spec_helper'

RSpec.describe 'Check if file has size', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:size) { 1 }

  before(:each) { write_fixed_size_file(file, size) }

  it { expect(file).to have_file_size 2 }
end
When
I run rspec
Then
the specs should not all pass
Fails if file does not exist
Given
a file named "spec/file_of_size_spec.rb" with: 
require 'spec_helper'

RSpec.describe 'Check if file has size', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:size) { 1 }

  it { expect(file).to have_file_size size }
end
When
I run rspec
Then
the specs should not all pass

Last published almost 6 years ago by philoserf.