Project: Aruba

Publisher: Mark Ayers

Check if file has content

If you need to check if a given file has content, you can use the
have_file_content-matcher. It accepts Object, Regexp or any other
RSpec::Matcher-matchers. It fails if file does not exist.

require 'spec_helper'

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

  before(:each) { write_file(file, content) }

  it { expect(file).to have_file_content content }
end

Background

Given: I use a fixture named "cli-app"

Scenarios

Expect existing file with content
Expect existing file with partial content
Expect existing file with partial content described by another matcher
Expect multiple existing files with content
Expect at least one file with content
Fails if file does not exist

Expect existing file with content

Given

a file named "spec/file_with_content_spec.rb" with:

require 'spec_helper'

RSpec.describe 'Check file content', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:content) { 'Hello World' }

  before(:each) { write_file(file, content) }

  it { expect(file).to have_file_content content }
end

When

I run rspec

Then

the specs should all pass

Expect existing file with partial content

Given

a file named "spec/file_with_content_spec.rb" with:

require 'spec_helper'

RSpec.describe 'Check file content', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:content) { 'Hello World' }

  before(:each) { write_file(file, content) }

  it { expect(file).to have_file_content /Hello/ }
end

When

I run rspec

Then

the specs should all pass

Expect existing file with partial content described by another matcher

Given

a file named "spec/file_with_content_spec.rb" with:

require 'spec_helper'

RSpec.describe 'Check file content', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:content) { 'Hello World' }

  before(:each) { write_file(file, content) }

  it { expect(file).to have_file_content a_string_starting_with('Hello') }
end

When

I run rspec

Then

the specs should all pass

Expect multiple existing files with content

Given

a file named "spec/file_with_content_spec.rb" with:

require 'spec_helper'

RSpec.describe 'Check file content', :type => :aruba do
  let(:files) { %w(file1.txt file2.txt) }
  let(:content) { 'Hello World' }

  before :each do
    files.each { |f| write_file(f, content) }
  end

  it { expect(files).to all have_file_content content }
end

When

I run rspec

Then

the specs should all pass

Expect at least one file with content

Given

a file named "spec/file_with_content_spec.rb" with:

require 'spec_helper'

RSpec.describe 'Check file content', :type => :aruba do
  let(:files) { %w(file1.txt file2.txt) }
  let(:content) { 'Hello World' }

  before(:each) { write_file(files.first, content) }

  it { expect(files).to include a_file_having_content content }
end

When

I run rspec

Then

the specs should all pass

Fails if file does not exist

Given

a file named "spec/file_with_content_spec.rb" with:

require 'spec_helper'

RSpec.describe 'Check file content', :type => :aruba do
  let(:file) { 'file.txt' }
  let(:content) { 'Hello World' }

  it { expect(file).to have_file_content content }
end

When

I run rspec

Then

the specs should not all pass

Last published almost 6 years ago by philoserf.

Check if file has content

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