Class: RSpec::CircleCI::Coverage

Inherits:
Object
  • Object
show all
Defined in:
lib/rspec/circleci/coverage.rb

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Coverage

Returns a new instance of Coverage.



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# File 'lib/rspec/circleci/coverage.rb', line 20

def initialize
  @coverage_data = Hash.new { |h, k| h[k] = {} }
  @before_coverage = {}
  @installed = false
end

Class Attribute Details

.instance ⇒ Object

Returns the value of attribute instance.



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# File 'lib/rspec/circleci/coverage.rb', line 9

def instance
  @instance
end

Class Method Details

.install ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 12

def self.install
  # Only install if CIRCLECI_COVERAGE environment variable is set
  return unless ENV['CIRCLECI_COVERAGE']

  self.instance ||= new
  instance.install
end

Instance Method Details

#capture_coverage ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 60

def capture_coverage
  @before_coverage = ::Coverage.peek_result.dup
end

#coverage_file ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 103

def coverage_file
  ENV['CIRCLECI_COVERAGE']
end

#extract_lines(coverage_value) ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 133

def extract_lines(coverage_value)
  case coverage_value
  when Array then coverage_value
  when Hash then coverage_value[:lines]
  else nil
  end
end

#format_test_key(example) ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 107

def format_test_key(example)
  file_path = example.metadata[:file_path]
  # Clean path to remove ./ and other redundant components
  file_path = Pathname.new(file_path).cleanpath.to_s if file_path
  description = example.full_description
  "#{file_path}!!#{description}|run"
end

#in_project_scope?(file) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rspec/circleci/coverage.rb', line 121

def in_project_scope?(file)
  # Check if file is within the project directory
  # Files outside the project (system files, gems, etc.) should be filtered out
  return false unless file.start_with?(Dir.pwd)

  # Exclude gem files (even if they're in .bundle or vendor directories)
  return false if file.include?('/gems/')
  return false if file.include?('/.bundle/')
  return false if file.include?('/vendor/')
  true
end

#install ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 26

def install
  return if @installed
  @installed = true

  # Start coverage tracking if not already running
  unless ::Coverage.running?
    ::Coverage.start(lines: true, eval: true)
  end

  coverage_instance = self

  # Hook into RSpec lifecycle
  RSpec.configure do |config|
    config.before(:suite) do
      $stdout.write("rspec-circleci-coverage: generating CircleCI coverage JSON...\n")
    end

    config.before(:each) do |_|
      # Take a snapshot before each test
      coverage_instance.capture_coverage
    end

    config.after(:each) do |example|
      # Take a snapshot after each test and record coverage
      coverage_instance.record_test_coverage(example)
    end

    config.after(:suite) do
      # Write coverage data to file
      coverage_instance.write_coverage_data
    end
  end
end

#record_test_coverage(example) ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 64

def record_test_coverage(example)
  # Take a snapshot after each test
  after_coverage = ::Coverage.peek_result

  # Calculate which lines were executed during this test
  test_key = format_test_key(example)

  after_coverage.each do |file, coverage|
    # Skip files outside project scope, spec files, and rspec gem internals
    next unless in_project_scope?(file)
    next if file.end_with?('_spec.rb')

    lines = extract_lines(coverage)
    next if lines.nil?

    before_lines = extract_lines(@before_coverage[file])

    # Any line whose count increased means this test executed the file.
    executed = lines.each_with_index.any? do |count, index|
      next false if count.nil?
      # Treat a missing before-count as 0 so the first render of an
      # eval'd file (e.g. a compiled template) is attributed to this test.
      before_count = before_lines ? (before_lines[index] || 0) : 0
      count > before_count
    end

    @coverage_data[relative_path(file)][test_key] = true if executed
  end
end

#relative_path(file) ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 115

def relative_path(file)
  # Convert absolute path to relative path from current directory
  pathname = Pathname.new(file)
  pathname.absolute? ? pathname.relative_path_from(Dir.pwd).to_s : file
end

#write_coverage_data ⇒ Object 



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# File 'lib/rspec/circleci/coverage.rb', line 94

def write_coverage_data
  if @coverage_data.empty?
    $stdout.write("rspec-circleci-coverage: warning: no coverage data collected\n")
  end

  File.write(coverage_file, JSON.pretty_generate(@coverage_data))
  $stdout.write("rspec-circleci-coverage: wrote #{coverage_file}\n")
end