Add support to exclude directories

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 ### Added
+- Unit testing configuration now allows `exclude_dirs` to be set, which prevents stray source files from as part of unit testing allows
 
 ### Changed
 

REFERENCE.md

@@ -112,8 +112,16 @@ For your unit tests, in addition to setting specific libraries and platforms, yo
 
 Filtering your unit tests may help speed up targeted testing locally, but it is intended primarily as a means to temporarily disable tests between individual commits.
 
+Furthermore, you can filter the files that will be included in the compilation step by specifying `exclude_dirs`. All cpp and header files in those directories will not be included in the compilation step, before the unittests are run.
+
 ```yaml
 unittest:
+
+  # Exclude these directories from compilation
+  exclude_dirs:
+    - someDirectory
+    - someOtherDirectory
+
   # Perform unit tests with these compilers (these are the binaries that will be called via the shell)
   compilers:
     - g++      # default

SampleProjects/TestSomething/.arduino-ci.yml

@@ -1,4 +1,6 @@
 unittest:
+  exclude_dirs:
+    - excludeThis
   platforms:
     - uno
     - due

SampleProjects/TestSomething/excludeThis/exclude-this.cpp

@@ -0,0 +1,6 @@
+This file intentionally contains syntactically incorrect code
+to break unit test compilation.  If arduino_ci is working
+properly, it should exclude this file (as per .arduino-ci.yml
+configuration) and unit test compilation should succeed.
+
+~!@#$%^&*()

SampleProjects/TestSomething/excludeThis/exclude-this.h

@@ -0,0 +1,6 @@
+This file intentionally contains syntactically incorrect code
+to break unit test compilation.  If arduino_ci is working
+properly, it should exclude this file (as per .arduino-ci.yml
+configuration) and unit test compilation should succeed.
+
+~!@#$%^&*()

arduino_ci.gemspec

@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "os", "~> 1.0"
   spec.add_dependency "rubyzip", "~> 1.2"
 
-  spec.add_development_dependency "bundler", "~> 1.15"
+  spec.add_development_dependency "bundler", "> 1.15"
   spec.add_development_dependency "keepachangelog_manager", "~> 0.0.2"
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency 'rubocop', '~>0.59.0'

exe/arduino_ci_remote.rb

@@ -183,7 +183,9 @@ def perform_unit_tests(file_config)
     return
   end
   config = file_config.with_override_config(@cli_options[:ci_config])
-  cpp_library = ArduinoCI::CppLibrary.new(Pathname.new("."), @arduino_cmd.lib_dir)
+  cpp_library = ArduinoCI::CppLibrary.new(Pathname.new("."),
+                                          @arduino_cmd.lib_dir,
+                                          config.exclude_dirs.map(&Pathname.method(:new)))
 
   # check GCC
   compilers = config.compilers_to_use

lib/arduino_ci/ci_config.rb

@@ -28,6 +28,7 @@
   compilers: Array,
   platforms: Array,
   libraries: Array,
+  exclude_dirs: Array,
   testfiles: {
     select: Array,
     reject: Array,
@@ -256,6 +257,14 @@ def compilers_to_use
       @unittest_info[:compilers]
     end
 
+    # paths to exclude all files in for building and unitttests
+    # @return [Array<String>] The directories (relative to base dir) to exclude
+    def exclude_dirs
+      return [] if @unittest_info[:exclude_dirs].nil?
+
+      @unittest_info[:exclude_dirs]
+    end
+
     # platforms to build [the examples on]
     # @return [Array<String>] The platforms to build
     def platforms_to_build

lib/arduino_ci/cpp_library.rb

@@ -37,11 +37,15 @@ class CppLibrary
 
     # @param base_dir [Pathname] The path to the library being tested
     # @param arduino_lib_dir [Pathname] The path to the libraries directory
-    def initialize(base_dir, arduino_lib_dir)
+    # @param exclude_dirs [Array<Pathname>] Directories that should be excluded from compilation
+    def initialize(base_dir, arduino_lib_dir, exclude_dirs)
       raise ArgumentError, 'base_dir is not a Pathname' unless base_dir.is_a? Pathname
       raise ArgumentError, 'arduino_lib_dir is not a Pathname' unless arduino_lib_dir.is_a? Pathname
+      raise ArgumentError, 'exclude_dir is not an array of Pathnames' unless exclude_dirs.is_a?(Array)
+      raise ArgumentError, 'exclude_dir array contains non-Pathname elements' unless exclude_dirs.all? { |p| p.is_a? Pathname }
 
       @base_dir = base_dir
+      @exclude_dirs = exclude_dirs
       @arduino_lib_dir = arduino_lib_dir.expand_path
       @artifacts = []
       @last_err = ""
@@ -115,6 +119,19 @@ def in_tests_dir?(path)
       false
     end
 
+    # Guess whether a file is part of any @excludes_dir dir (indicating library compilation should ignore it).
+    #
+    # @param path [Pathname] The path to check
+    # @return [bool]
+    def in_exclude_dir?(path)
+      # we could do this but some rubies don't return an enumerator for ascend
+      # path.ascend.any? { |part| tests_dir_aliases.include?(part) }
+      path.ascend do |part|
+        return true if exclude_dir.any? { |p| p.realpath == part }
+      end
+      false
+    end
+
     # Check whether libasan (and by extension -fsanitizer=address) is supported
     #
     # This requires compilation of a sample program, and will be cached
@@ -150,7 +167,7 @@ def cpp_files_in(some_dir)
     # CPP files that are part of the project library under test
     # @return [Array<Pathname>]
     def cpp_files
-      cpp_files_in(@base_dir).reject { |p| vendor_bundle?(p) || in_tests_dir?(p) }
+      cpp_files_in(@base_dir).reject { |p| vendor_bundle?(p) || in_tests_dir?(p) || in_exclude_dir?(p) }
     end
 
     # CPP files that are part of the arduino mock library we're providing
@@ -172,6 +189,12 @@ def cpp_files_libraries(aux_libraries)
       arduino_library_src_dirs(aux_libraries).map { |d| cpp_files_in(d) }.flatten.uniq
     end
 
+    # Returns the Pathnames for all paths to exclude from testing and compilation
+    # @return [Array<Pathname>]
+    def exclude_dir
+      @exclude_dirs.map { |p| Pathname.new(@base_dir) + p }.select(&:exist?)
+    end
+
     # The directory where we expect to find unit test defintions provided by the user
     # @return [Pathname]
     def tests_dir
@@ -190,7 +213,8 @@ def header_dirs
       real = @base_dir.realpath
       all_files = Find.find(real).map { |f| Pathname.new(f) }.reject(&:directory?)
       unbundled = all_files.reject { |path| vendor_bundle?(path) }
-      files = unbundled.select { |path| HPP_EXTENSIONS.include?(path.extname.downcase) }
+      unexcluded = unbundled.reject { |path| in_exclude_dir?(path) }
+      files = unexcluded.select { |path| HPP_EXTENSIONS.include?(path.extname.downcase) }
       files.map(&:dirname).uniq
     end
 

spec/ci_config_spec.rb

@@ -157,7 +157,7 @@
 
   context "allowable_unittest_files" do
     cpp_lib_path = Pathname.new(__dir__) + "fake_library"
-    cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path, Pathname.new("my_fake_arduino_lib_dir"))
+    cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path, Pathname.new("my_fake_arduino_lib_dir"), [])
 
     it "starts with a known set of files" do
       expect(cpp_library.test_files.map { |f| File.basename(f) }).to match_array([
@@ -177,4 +177,3 @@
   end
 
 end
-

spec/cpp_library_spec.rb

@@ -13,7 +13,7 @@ def get_relative_dir(sampleprojects_tests_dir)
 RSpec.describe ArduinoCI::CppLibrary do
   next if skip_ruby_tests
   cpp_lib_path = sampleproj_path + "DoSomething"
-  cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path, Pathname.new("my_fake_arduino_lib_dir"))
+  cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path, Pathname.new("my_fake_arduino_lib_dir"), [])
   context "cpp_files" do
     it "finds cpp files in directory" do
       dosomething_cpp_files = [Pathname.new("DoSomething") + "do-something.cpp"]

spec/testsomething_unittests_spec.rb

@@ -10,10 +10,44 @@ def get_relative_dir(sampleprojects_tests_dir)
   sampleprojects_tests_dir.relative_path_from(base_dir)
 end
 
+RSpec.describe "TestSomething C++ without excludes" do
+  next if skip_cpp_tests
+  cpp_lib_path = sampleproj_path + "TestSomething"
+  cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path,
+                                          Pathname.new("my_fake_arduino_lib_dir"),
+                                          [])
+  context "cpp_files" do
+    it "finds cpp files in directory" do
+      testsomething_cpp_files = [
+        Pathname.new("TestSomething/test-something.cpp"),
+        Pathname.new("TestSomething/excludeThis/exclude-this.cpp")
+      ]
+      relative_paths = cpp_library.cpp_files.map { |f| get_relative_dir(f) }
+      expect(relative_paths).to match_array(testsomething_cpp_files)
+    end
+  end
+
+  context "unit tests" do
+    it "can't build due to files that should have been excluded" do
+      config = ArduinoCI::CIConfig.default.from_example(cpp_lib_path)
+      path = config.allowable_unittest_files(cpp_library.test_files).first
+      compiler = config.compilers_to_use.first
+      result = cpp_library.build_for_test_with_configuration(path,
+                                                             [],
+                                                             compiler,
+                                                             config.gcc_config("uno"))
+      expect(result).to be nil
+    end
+  end
+
+end
+
 RSpec.describe "TestSomething C++" do
   next if skip_cpp_tests
   cpp_lib_path = sampleproj_path + "TestSomething"
-  cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path, Pathname.new("my_fake_arduino_lib_dir"))
+  cpp_library = ArduinoCI::CppLibrary.new(cpp_lib_path,
+                                          Pathname.new("my_fake_arduino_lib_dir"),
+                                          ["excludeThis"].map(&Pathname.method(:new)))
   context "cpp_files" do
     it "finds cpp files in directory" do
       testsomething_cpp_files = [Pathname.new("TestSomething/test-something.cpp")]