Merge pull request #133 from emancu/add_ruby_3.1

Add Ruby 3.1 and fix linter

.github/workflows/ruby.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['2.5', '2.6', '2.7', '3.0', truffleruby-head]
+        ruby-version: ['2.5', '2.6', '2.7', '3.0', '3.1', truffleruby-head]
 
     steps:
     - uses: actions/checkout@v2
@@ -42,7 +42,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7
+        ruby-version: '2.5'
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
 
     - name: Run standardrb

test/grammar_test.rb

@@ -18,24 +18,24 @@ def test_table
     indentation_alternatives_for("[akey]") do |str|
       match = TomlRB::Document.parse(str, root: :table)
       assert_equal(TomlRB::Table, match.value.class)
-      assert_equal(["akey"], match.value.instance_variable_get("@dotted_keys"))
+      assert_equal(["akey"], match.value.instance_variable_get(:@dotted_keys))
     end
 
     match = TomlRB::Document.parse("[owner.emancu]", root: :table)
     assert_equal(%w[owner emancu],
-      match.value.instance_variable_get("@dotted_keys"))
+      match.value.instance_variable_get(:@dotted_keys))
 
     match = TomlRB::Document.parse('["owner.emancu"]', root: :table)
     assert_equal(%w[owner.emancu],
-      match.value.instance_variable_get("@dotted_keys"))
+      match.value.instance_variable_get(:@dotted_keys))
 
     match = TomlRB::Document.parse('["first key"."second key"]', root: :table)
     assert_equal(["first key", "second key"],
-      match.value.instance_variable_get("@dotted_keys"))
+      match.value.instance_variable_get(:@dotted_keys))
 
     match = TomlRB::Document.parse("[ owner . emancu ]", root: :table)
     assert_equal(%w[owner emancu],
-      match.value.instance_variable_get("@dotted_keys"))
+      match.value.instance_variable_get(:@dotted_keys))
 
     assert_raises Citrus::ParseError do
       TomlRB::Document.parse("[ owner emancu ]", root: :table)
@@ -48,19 +48,19 @@ def test_keyvalue
       assert_equal(TomlRB::Keyvalue, match.value.class)
 
       keyvalue = match.value
-      assert_equal("key", keyvalue.instance_variable_get("@dotted_keys").first)
-      assert_equal("value", keyvalue.instance_variable_get("@value"))
+      assert_equal("key", keyvalue.instance_variable_get(:@dotted_keys).first)
+      assert_equal("value", keyvalue.instance_variable_get(:@value))
     end
 
     indentation_alternatives_for('key1."key2".key3 = "value"') do |str|
       match = TomlRB::Document.parse(str, root: :keyvalue)
       assert_equal(TomlRB::Keyvalue, match.value.class)
 
       keyvalue = match.value
-      assert_equal("key1", keyvalue.instance_variable_get("@dotted_keys")[0])
-      assert_equal("key2", keyvalue.instance_variable_get("@dotted_keys")[1])
-      assert_equal("key3", keyvalue.instance_variable_get("@dotted_keys")[2])
-      assert_equal("value", keyvalue.instance_variable_get("@value"))
+      assert_equal("key1", keyvalue.instance_variable_get(:@dotted_keys)[0])
+      assert_equal("key2", keyvalue.instance_variable_get(:@dotted_keys)[1])
+      assert_equal("key3", keyvalue.instance_variable_get(:@dotted_keys)[2])
+      assert_equal("value", keyvalue.instance_variable_get(:@value))
     end
   end
 
@@ -207,11 +207,11 @@ def test_signed_numbers
   def test_expressions_with_comments
     match = TomlRB::Document.parse("[shouldwork] # with comment", root: :table)
     assert_equal(["shouldwork"],
-      match.value.instance_variable_get("@dotted_keys"))
+      match.value.instance_variable_get(:@dotted_keys))
 
     match = TomlRB::Document.parse("works = true # with comment", root: :keyvalue).value
-    assert_equal("works", match.instance_variable_get("@dotted_keys").first)
-    assert_equal(true, match.instance_variable_get("@value"))
+    assert_equal("works", match.instance_variable_get(:@dotted_keys).first)
+    assert_equal(true, match.instance_variable_get(:@value))
   end
 
   def test_array