Lazily evaluate FileUpdateCheckerSharedTests when being included

To avoid "uninitialized constant ActiveSupport::Testing (NameError)"

activesupport/test/file_update_checker_shared_tests.rb

@@ -3,294 +3,298 @@
 require "fileutils"
 
 module FileUpdateCheckerSharedTests
-  extend ActiveSupport::Testing::Declarative
-  include FileUtils
+  def self.included(kls)
+    kls.class_eval do
+      extend ActiveSupport::Testing::Declarative
+      include FileUtils
 
-  def tmpdir
-    @tmpdir
-  end
+      def tmpdir
+        @tmpdir
+      end
 
-  def tmpfile(name)
-    File.join(tmpdir, name)
-  end
+      def tmpfile(name)
+        File.join(tmpdir, name)
+      end
 
-  def tmpfiles
-    @tmpfiles ||= %w(foo.rb bar.rb baz.rb).map { |f| tmpfile(f) }
-  end
+      def tmpfiles
+        @tmpfiles ||= %w(foo.rb bar.rb baz.rb).map { |f| tmpfile(f) }
+      end
 
-  def run(*args)
-    capture_exceptions do
-      Dir.mktmpdir(nil, __dir__) { |dir| @tmpdir = dir; super }
-    end
-  end
+      def run(*args)
+        capture_exceptions do
+          Dir.mktmpdir(nil, __dir__) { |dir| @tmpdir = dir; super }
+        end
+      end
 
-  test "should not execute the block if no paths are given" do
-    silence_warnings { require "listen" }
-    i = 0
+      test "should not execute the block if no paths are given" do
+        silence_warnings { require "listen" }
+        i = 0
 
-    checker = new_checker { i += 1 }
+        checker = new_checker { i += 1 }
 
-    assert_not checker.execute_if_updated
-    assert_equal 0, i
-  end
+        assert_not checker.execute_if_updated
+        assert_equal 0, i
+      end
 
-  test "should not execute the block if no files change" do
-    i = 0
+      test "should not execute the block if no files change" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    checker = new_checker(tmpfiles) { i += 1 }
+        checker = new_checker(tmpfiles) { i += 1 }
 
-    assert_not checker.execute_if_updated
-    assert_equal 0, i
-  end
+        assert_not checker.execute_if_updated
+        assert_equal 0, i
+      end
 
-  test "should execute the block once when files are created" do
-    i = 0
+      test "should execute the block once when files are created" do
+        i = 0
 
-    checker = new_checker(tmpfiles) { i += 1 }
+        checker = new_checker(tmpfiles) { i += 1 }
 
-    touch(tmpfiles)
-    wait
+        touch(tmpfiles)
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "should execute the block once when files are modified" do
-    i = 0
+      test "should execute the block once when files are modified" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    checker = new_checker(tmpfiles) { i += 1 }
+        checker = new_checker(tmpfiles) { i += 1 }
 
-    touch(tmpfiles)
-    wait
+        touch(tmpfiles)
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "should execute the block once when files are deleted" do
-    i = 0
+      test "should execute the block once when files are deleted" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    checker = new_checker(tmpfiles) { i += 1 }
+        checker = new_checker(tmpfiles) { i += 1 }
 
-    rm_f(tmpfiles)
-    wait
+        rm_f(tmpfiles)
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "updated should become true when watched files are created" do
-    i = 0
+      test "updated should become true when watched files are created" do
+        i = 0
 
-    checker = new_checker(tmpfiles) { i += 1 }
-    assert_not_predicate checker, :updated?
+        checker = new_checker(tmpfiles) { i += 1 }
+        assert_not_predicate checker, :updated?
 
-    touch(tmpfiles)
-    wait
+        touch(tmpfiles)
+        wait
 
-    assert_predicate checker, :updated?
-  end
+        assert_predicate checker, :updated?
+      end
 
-  test "updated should become true when watched files are modified" do
-    i = 0
+      test "updated should become true when watched files are modified" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    checker = new_checker(tmpfiles) { i += 1 }
-    assert_not_predicate checker, :updated?
+        checker = new_checker(tmpfiles) { i += 1 }
+        assert_not_predicate checker, :updated?
 
-    touch(tmpfiles)
-    wait
+        touch(tmpfiles)
+        wait
 
-    assert_predicate checker, :updated?
-  end
+        assert_predicate checker, :updated?
+      end
 
-  test "updated should become true when watched files are deleted" do
-    i = 0
+      test "updated should become true when watched files are deleted" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    checker = new_checker(tmpfiles) { i += 1 }
-    assert_not_predicate checker, :updated?
+        checker = new_checker(tmpfiles) { i += 1 }
+        assert_not_predicate checker, :updated?
 
-    rm_f(tmpfiles)
-    wait
+        rm_f(tmpfiles)
+        wait
 
-    assert_predicate checker, :updated?
-  end
+        assert_predicate checker, :updated?
+      end
 
-  test "should be robust to handle files with wrong modified time" do
-    i = 0
+      test "should be robust to handle files with wrong modified time" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    now  = Time.now
-    time = Time.mktime(now.year + 1, now.month, now.day) # wrong mtime from the future
-    File.utime(time, time, tmpfiles[0])
+        now  = Time.now
+        time = Time.mktime(now.year + 1, now.month, now.day) # wrong mtime from the future
+        File.utime(time, time, tmpfiles[0])
 
-    checker = new_checker(tmpfiles) { i += 1 }
+        checker = new_checker(tmpfiles) { i += 1 }
 
-    touch(tmpfiles[1..-1])
-    wait
+        touch(tmpfiles[1..-1])
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "should return max_time for files with mtime = Time.at(0)" do
-    i = 0
+      test "should return max_time for files with mtime = Time.at(0)" do
+        i = 0
 
-    FileUtils.touch(tmpfiles)
+        FileUtils.touch(tmpfiles)
 
-    time = Time.at(0) # wrong mtime from the future
-    File.utime(time, time, tmpfiles[0])
+        time = Time.at(0) # wrong mtime from the future
+        File.utime(time, time, tmpfiles[0])
 
-    checker = new_checker(tmpfiles) { i += 1 }
+        checker = new_checker(tmpfiles) { i += 1 }
 
-    touch(tmpfiles[1..-1])
-    wait
+        touch(tmpfiles[1..-1])
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "should cache updated result until execute" do
-    i = 0
+      test "should cache updated result until execute" do
+        i = 0
 
-    checker = new_checker(tmpfiles) { i += 1 }
-    assert_not_predicate checker, :updated?
+        checker = new_checker(tmpfiles) { i += 1 }
+        assert_not_predicate checker, :updated?
 
-    touch(tmpfiles)
-    wait
+        touch(tmpfiles)
+        wait
 
-    assert_predicate checker, :updated?
-    checker.execute
-    assert_not_predicate checker, :updated?
-  end
+        assert_predicate checker, :updated?
+        checker.execute
+        assert_not_predicate checker, :updated?
+      end
 
-  test "should execute the block if files change in a watched directory one extension" do
-    i = 0
+      test "should execute the block if files change in a watched directory one extension" do
+        i = 0
 
-    checker = new_checker([], tmpdir => :rb) { i += 1 }
+        checker = new_checker([], tmpdir => :rb) { i += 1 }
 
-    touch(tmpfile("foo.rb"))
-    wait
+        touch(tmpfile("foo.rb"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "should execute the block if files change in a watched directory any extensions" do
-    i = 0
+      test "should execute the block if files change in a watched directory any extensions" do
+        i = 0
 
-    checker = new_checker([], tmpdir => []) { i += 1 }
+        checker = new_checker([], tmpdir => []) { i += 1 }
 
-    touch(tmpfile("foo.rb"))
-    wait
+        touch(tmpfile("foo.rb"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "should execute the block if files change in a watched directory several extensions" do
-    i = 0
+      test "should execute the block if files change in a watched directory several extensions" do
+        i = 0
 
-    checker = new_checker([], tmpdir => [:rb, :txt]) { i += 1 }
+        checker = new_checker([], tmpdir => [:rb, :txt]) { i += 1 }
 
-    touch(tmpfile("foo.rb"))
-    wait
+        touch(tmpfile("foo.rb"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
+        assert checker.execute_if_updated
+        assert_equal 1, i
 
-    touch(tmpfile("foo.txt"))
-    wait
+        touch(tmpfile("foo.txt"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 2, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 2, i
+      end
 
-  test "should not execute the block if the file extension is not watched" do
-    i = 0
+      test "should not execute the block if the file extension is not watched" do
+        i = 0
 
-    checker = new_checker([], tmpdir => :txt) { i += 1 }
+        checker = new_checker([], tmpdir => :txt) { i += 1 }
 
-    touch(tmpfile("foo.rb"))
-    wait
+        touch(tmpfile("foo.rb"))
+        wait
 
-    assert_not checker.execute_if_updated
-    assert_equal 0, i
-  end
+        assert_not checker.execute_if_updated
+        assert_equal 0, i
+      end
 
-  test "does not assume files exist on instantiation" do
-    i = 0
+      test "does not assume files exist on instantiation" do
+        i = 0
 
-    non_existing = tmpfile("non_existing.rb")
-    checker = new_checker([non_existing]) { i += 1 }
+        non_existing = tmpfile("non_existing.rb")
+        checker = new_checker([non_existing]) { i += 1 }
 
-    touch(non_existing)
-    wait
+        touch(non_existing)
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "detects files in new subdirectories" do
-    i = 0
+      test "detects files in new subdirectories" do
+        i = 0
 
-    checker = new_checker([], tmpdir => :rb) { i += 1 }
+        checker = new_checker([], tmpdir => :rb) { i += 1 }
 
-    subdir = tmpfile("subdir")
-    mkdir(subdir)
-    wait
+        subdir = tmpfile("subdir")
+        mkdir(subdir)
+        wait
 
-    assert_not checker.execute_if_updated
-    assert_equal 0, i
+        assert_not checker.execute_if_updated
+        assert_equal 0, i
 
-    touch(File.join(subdir, "nested.rb"))
-    wait
+        touch(File.join(subdir, "nested.rb"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 1, i
+      end
 
-  test "looked up extensions are inherited in subdirectories not listening to them" do
-    i = 0
+      test "looked up extensions are inherited in subdirectories not listening to them" do
+        i = 0
 
-    subdir = tmpfile("subdir")
-    mkdir(subdir)
+        subdir = tmpfile("subdir")
+        mkdir(subdir)
 
-    checker = new_checker([], tmpdir => :rb, subdir => :txt) { i += 1 }
+        checker = new_checker([], tmpdir => :rb, subdir => :txt) { i += 1 }
 
-    touch(tmpfile("new.txt"))
-    wait
+        touch(tmpfile("new.txt"))
+        wait
 
-    assert_not checker.execute_if_updated
-    assert_equal 0, i
+        assert_not checker.execute_if_updated
+        assert_equal 0, i
 
-    # subdir does not look for Ruby files, but its parent tmpdir does.
-    touch(File.join(subdir, "nested.rb"))
-    wait
+        # subdir does not look for Ruby files, but its parent tmpdir does.
+        touch(File.join(subdir, "nested.rb"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 1, i
+        assert checker.execute_if_updated
+        assert_equal 1, i
 
-    touch(File.join(subdir, "nested.txt"))
-    wait
+        touch(File.join(subdir, "nested.txt"))
+        wait
 
-    assert checker.execute_if_updated
-    assert_equal 2, i
-  end
+        assert checker.execute_if_updated
+        assert_equal 2, i
+      end
 
-  test "initialize raises an ArgumentError if no block given" do
-    assert_raise ArgumentError do
-      new_checker([])
+      test "initialize raises an ArgumentError if no block given" do
+        assert_raise ArgumentError do
+          new_checker([])
+        end
+      end
     end
   end
 end