Extract custom parser tests to a separate feature spec file

spec/features/custom_parser_spec.rb

@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+class ParserTest
+  include HappyMapper
+
+  class Coerce
+    def self.number_list(val)
+      val.to_s.split(",").map { _1.strip.to_i }
+    end
+  end
+
+  tag "parsertest"
+  attribute :numbers, Coerce, parser: :number_list
+  element :strings, self, parser: :string_list
+  element :bool, String, parser: ->(val) { val.to_s == "1" }
+
+  def self.string_list(val)
+    val.to_s.split(",").map(&:strip)
+  end
+end
+
+RSpec.describe "specifying a custom parser for attributes and elements" do
+  let(:xml) do
+    <<~XML
+      <parsertest numbers="1,2,3">
+        <strings>a, b, c</strings>
+        <bool>0</bool>
+      </parsertest>
+    XML
+  end
+
+  it "parses with a singleton method on the type class" do
+    parsed = ParserTest.parse xml
+
+    expect(parsed.numbers).to eq [1, 2, 3]
+  end
+
+  it "parses with a singleton method on the model class" do
+    parsed = ParserTest.parse xml
+
+    expect(parsed.strings).to eq %w(a b c)
+  end
+
+  it "parses with a proc specified in the element definition" do
+    parsed = ParserTest.parse xml
+
+    expect(parsed.bool).to be false
+  end
+end

spec/happymapper_spec.rb

@@ -560,25 +560,6 @@ class Thing
   end
 end
 
-class ParserTest
-  include HappyMapper
-
-  class Coerce
-    def self.number_list(val)
-      val.to_s.split(",").map { _1.strip.to_i }
-    end
-  end
-
-  tag "parsertest"
-  attribute :numbers, Coerce, parser: :number_list
-  element :strings, self, parser: :string_list
-  element :bool, String, parser: ->(val) { val.to_s == "1" }
-
-  def self.string_list(val)
-    val.to_s.split(",").map(&:strip)
-  end
-end
-
 describe HappyMapper do
   describe "being included into another class" do
     let(:klass) do
@@ -1235,14 +1216,4 @@ def self.string_list(val)
       end
     end
   end
-
-  it "parses with custom parser" do
-    parsed = ParserTest.parse fixture_file("custom_parsers.xml")
-
-    aggregate_failures do
-      expect(parsed.numbers).to eq [1, 2, 3]
-      expect(parsed.strings).to eq %w(a b c)
-      expect(parsed.bool).to be false
-    end
-  end
 end