Modernise build

.github/workflows/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "bundler"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/ruby.yml

@@ -0,0 +1,16 @@
+name: Build and Test
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["2.6", "2.7", "3.0"]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - run: bundle exec rake

.gitignore

@@ -9,4 +9,4 @@ tmp/
 .bundle/
 vendor/
 .idea/
-
+Gemfile.lock

.ruby-version

@@ -1 +1 @@
-2.4.3
+3.0.3

Gemfile

@@ -1,16 +1,4 @@
-source 'https://rubygems.org'
+# frozen_string_literal: true
 
-# Specify your gem's dependencies in rubytree.gemspec
+source "https://rubygems.org"
 gemspec
-
-group :development, :test do
-  gem 'rake', '>= 13.0.1'
-  gem 'test-unit', '~> 3.3.6'
-  gem 'coveralls', '>= 0.8.23', :require => false, :platforms => :mri_21
-  gem 'rspec', '>= 3.9.0'
-  gem 'rubocop'
-end
-
-# Local Variables:
-# mode: ruby
-# End:

lib/tree.rb

@@ -89,7 +89,6 @@ class TreeNode
     include Comparable
     include Tree::Utils::TreeMetricsHandler
     include Tree::Utils::TreePathHandler
-    include Tree::Utils::CamelCaseMethodHandler
     include Tree::Utils::JSONConverter
     include Tree::Utils::TreeMergeHandler
     include Tree::Utils::HashConverter
@@ -217,14 +216,9 @@ def has_children?
     # @see #[]
     def initialize(name, content = nil)
       raise ArgumentError, 'Node name HAS to be provided!' if name == nil
-      @name, @content = name, content
 
-      if name.kind_of?(Integer)
-        warn StructuredWarnings::StandardWarning,
-             'Using integer as node name.'\
-             ' Semantics of TreeNode[] may not be what you expect!'\
-             " #{name} #{content}"
-      end
+      name = name.to_s if name.kind_of?(Integer)
+      @name, @content = name, content
 
       self.set_as_root!
       @children_hash = Hash.new
@@ -593,24 +587,17 @@ def freeze_tree!
     #   in not in range, or the name is not present, then a +nil+
     #   is returned.
     #
-    # @note The use of +Integer+ names is allowed by using the optional
-    #       +num_as_name+ flag.
-    #
     # @raise [ArgumentError] Raised if the +name_or_index+ argument is +nil+.
     #
     # @see #add
     # @see #initialize
-    def [](name_or_index, num_as_name=false)
+    def [](name_or_index)
       raise ArgumentError,
             'Name_or_index needs to be provided!' if name_or_index == nil
 
-      if name_or_index.kind_of?(Integer) and not num_as_name
+      if name_or_index.kind_of?(Integer)
         @children[name_or_index]
       else
-        if num_as_name and not name_or_index.kind_of?(Integer)
-          warn StructuredWarnings::StandardWarning,
-               'Redundant use of the `num_as_name` flag for non-integer node name'
-        end
         @children_hash[name_or_index]
       end
     end

lib/tree/tree_deps.rb

@@ -37,13 +37,11 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-require 'structured_warnings'
 require 'json'
 
 require_relative '../tree/version'
 require_relative '../tree/utils/metrics_methods'
 require_relative '../tree/utils/path_methods'
-require_relative '../tree/utils/camel_case_method_handler'
 require_relative '../tree/utils/json_converter'
 require_relative '../tree/utils/tree_merge_handler'
 require_relative '../tree/utils/hash_converter'

lib/tree/utils/hash_converter.rb

@@ -37,8 +37,6 @@
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require_relative '../../../lib/tree/utils/utils'
-
 module Tree::Utils::HashConverter
 
   def self.included(base)

lib/tree/utils/json_converter.rb

@@ -35,7 +35,6 @@
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require_relative '../utils/utils'
 require 'json'
 
 # Provides utility methods to convert a {Tree::TreeNode} to and from