fix(type): support nilable elements in ArrayOf and HashOf case equality

lib/context_dev/internal/type/array_of.rb

@@ -38,7 +38,7 @@ def self.[](...) = new(...)
         # @param other [Object]
         #
         # @return [Boolean]
-        def ===(other) = other.is_a?(Array) && other.all?(item_type)
+        def ===(other) = other.is_a?(Array) && other.all? { (nilable? && _1.nil?) || item_type === _1 }
 
         # @api public
         #

lib/context_dev/internal/type/hash_of.rb

@@ -46,6 +46,8 @@ def ===(other)
               case [key, val]
               in [Symbol | String, ^type]
                 true
+              in [Symbol | String, nil] if nilable?
+                true
               else
                 false
               end

test/context_dev/internal/type/base_model_test.rb

@@ -725,3 +725,30 @@ def test_meta_retrieval
     assert_equal({doc: "dawg"}, ub)
   end
 end
+
+class ContextDev::Test::NilableCollectionCaseEqualityTest < Minitest::Test
+  def test_array_of_nilable_case_equality
+    arr_type = ContextDev::Internal::Type::ArrayOf[String, nil?: true]
+    assert_operator(arr_type, :===, ["hello", nil])
+    assert_operator(arr_type, :===, [nil])
+    assert_operator(arr_type, :===, ["hello", "world"])
+    refute_operator(arr_type, :===, ["hello", 123])
+
+    non_nilable = ContextDev::Internal::Type::ArrayOf[String]
+    assert_operator(non_nilable, :===, ["hello", "world"])
+    refute_operator(non_nilable, :===, ["hello", nil])
+  end
+
+  def test_hash_of_nilable_case_equality
+    hash_type = ContextDev::Internal::Type::HashOf[String, nil?: true]
+    assert_operator(hash_type, :===, {a: "hello", b: nil})
+    assert_operator(hash_type, :===, {"a" => "hello", "b" => nil})
+    assert_operator(hash_type, :===, {a: nil})
+    assert_operator(hash_type, :===, {a: "hello"})
+    refute_operator(hash_type, :===, {a: 123})
+
+    non_nilable = ContextDev::Internal::Type::HashOf[String]
+    assert_operator(non_nilable, :===, {a: "hello", b: "world"})
+    refute_operator(non_nilable, :===, {a: "hello", b: nil})
+  end
+end