run relative URL test only on supported CMake versions (3.27)

.github/workflows/test.yaml

@@ -19,7 +19,7 @@ jobs:
  os: [ubuntu-latest, windows-2022, macos-latest]
  # we want to ensure compatibility with a recent CMake version as well as the lowest officially supported
  # legacy version that we define as the default version of the second-latest Ubuntu LTS release currently available
- cmake_version: ['3.16.3', '3.25.1']
+ cmake_version: ['3.16.3', '3.25.1', '3.27.5']
  exclude:
  # there seems to be an issue with CMake 3.16 not finding a C++ compiler on windows-2022 
  - os: windows-2022

test/integration/test_relative_urls.rb

@@ -1,10 +1,17 @@
 require_relative './lib'
 
 class RelativeURLs < IntegrationTest
+ def setup
+ # relative URLs were introduced in CMake 3.27
+ @relative_urls_supported = (!ENV['CMAKE_VERSION']) || (Gem::Version.new(ENV['CMAKE_VERSION']) >= Gem::Version.new('3.27'))
+ end
+
  def test_add_project_with_relative_urls
- prj = make_project from_template: 'using-fibadder'
- prj.create_lists_from_default_template package: 'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.1.0-relative-urls")'
- assert_success prj.configure
- assert_success prj.build
+ omit_if !@relative_urls_supported do
+ prj = make_project from_template: 'using-fibadder'
+ prj.create_lists_from_default_template package: 'CPMAddPackage("gh:cpm-cmake/testpack-fibadder@1.1.0-relative-urls")'
+ assert_success prj.configure
+ assert_success prj.build
+ end
  end
 end