spec/ruby/library/coverage/supported_spec.rb


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require_relative '../../spec_helper'
require 'coverage'

describe "Coverage.supported?" do
  ruby_version_is "3.2" do
    it "returns true or false if coverage measurement is supported for the given mode" do
      [true, false].should.include?(Coverage.supported?(:lines))
      [true, false].should.include?(Coverage.supported?(:branches))
      [true, false].should.include?(Coverage.supported?(:methods))
      [true, false].should.include?(Coverage.supported?(:eval))
    end

    it "returns false for not existing modes" do
      Coverage.supported?(:foo).should == false
      Coverage.supported?(:bar).should == false
    end

    it "raise TypeError if argument is not Symbol" do
      -> {
        Coverage.supported?("lines")
      }.should raise_error(TypeError, "wrong argument type String (expected Symbol)")

      -> {
        Coverage.supported?([])
      }.should raise_error(TypeError, "wrong argument type Array (expected Symbol)")

      -> {
        Coverage.supported?(1)
      }.should raise_error(TypeError, "wrong argument type Integer (expected Symbol)")
    end
  end
end