lib/petitest/assertion_failure_error.rb in petitest-0.1.0 vs lib/petitest/assertion_failure_error.rb in petitest-0.1.1

@@ -1,4 +1,40 @@
 module Petitest
   class AssertionFailureError < ::StandardError
+    # @return [String, nil]
+    attr_reader :additional_message
+
+    # @return [String]
+    attr_reader :template
+
+    # @return [Hash{Symbol => Object}]
+    attr_reader :template_variables
+
+    # @param additional_message [String, nil]
+    # @param template [String]
+    # @param template_variables [Hash, nil]
+    def initialize(
+      additional_message:,
+      template:,
+      template_variables:
+    )
+      @additional_message = additional_message
+      @template = template
+      @template_variables = template_variables
+      super(assertion_type_message)
+    end
+
+    # @return [String]
+    def assertion_type_message
+      template % inspected_template_variables
+    end
+
+    private
+
+    # @return [Hash{Symbol => String}]
+    def inspected_template_variables
+      template_variables.map do |key, value|
+        [key, value.inspect]
+      end.to_h
+    end
   end
 end