Some more easy target refactors

EmptyMatcher should extend StandardMatcher.

src/spectator/matchers/empty_matcher.cr

@@ -3,7 +3,7 @@ require "./matcher"
 module Spectator::Matchers
   # Matcher that tests whether a collection is empty.
   # The values are checked with the `empty?` method.
-  struct EmptyMatcher < Matcher
+  struct EmptyMatcher < StandardMatcher
     private def match?(actual)
       actual.value.empty?
     end
@@ -19,9 +19,5 @@ module Spectator::Matchers
     private def failure_message_when_negated(actual)
       "#{actual.label} is empty"
     end
-
-    private def values(actual)
-      {actual: actual.value.inspect}
-    end
   end
 end

src/spectator/matchers/inequality_matcher.cr

@@ -4,43 +4,34 @@ module Spectator::Matchers
   # Matcher that tests whether two values do not equal each other.
   # The values are compared with the != operator.
   struct InequalityMatcher(ExpectedType) < ValueMatcher(ExpectedType)
-    # Determines whether the matcher is satisfied with the value given to it.
     private def match?(actual)
-      actual != expected
+      expected.value != actual.value
     end
 
-    # Determines whether the matcher is satisfied with the partial given to it.
-    def match(partial, negated = false)
-      values = ExpectedActual.new(partial, self)
-      MatchData.new(match?(values.actual), values)
+    def description
+      "is not equal to #{expected.label}"
     end
 
-    # Match data specific to this matcher.
-    private struct MatchData(ExpectedType, ActualType) < MatchData
-      # Creates the match data.
-      def initialize(matched, @values : ExpectedActual(ExpectedType, ActualType))
-        super(matched)
-      end
+    private def failure_message(actual)
+      "#{actual.label} is equal to #{expected.label}"
+    end
 
-      # Information about the match.
-      def named_tuple
-        {
-          expected: NegatablePrefixedMatchDataValue.new("Not", "", @values.expected),
-          actual:   @values.actual,
-        }
-      end
+    private def failure_message_when_negated(actual)
+      "#{actual.label} is not equal to #{expected.label}"
+    end
 
-      # Describes the condition that satisfies the matcher.
-      # This is informational and displayed to the end-user.
-      def message
-        "#{@values.actual_label} is not #{@values.expected_label} (using !=)"
-      end
+    private def values(actual)
+      {
+        expected: "Not #{expected.value.inspect}",
+        actual:   actual.value.inspect,
+      }
+    end
 
-      # Describes the condition that won't satsify the matcher.
-      # This is informational and displayed to the end-user.
-      def negated_message
-        "#{@values.actual_label} is #{@values.expected_label} (using !=)"
-      end
+    private def negated_values(actual)
+      {
+        expected: expected.value.inspect,
+        actual:   actual.value.inspect,
+      }
     end
   end
 end

src/spectator/matchers/nil_matcher.cr

@@ -3,45 +3,21 @@ require "./matcher"
 module Spectator::Matchers
   # Common matcher that tests whether a value is nil.
   # The `Object#nil?` method is used for this.
-  struct NilMatcher < Matcher
-    # Textual representation of what the matcher expects.
-    def label
-      "nil?"
+  struct NilMatcher < StandardMatcher
+    private def match?(actual)
+      actual.value.nil?
     end
 
-    # Determines whether the matcher is satisfied with the partial given to it.
-    def match(partial, negated = false)
-      actual = partial.actual
-      matched = actual.nil?
-      MatchData.new(matched, actual, partial.label)
+    def description
+      "is nil"
     end
 
-    # Match data specific to this matcher.
-    private struct MatchData(T) < MatchData
-      # Creates the match data.
-      def initialize(matched, @actual : T, @actual_label : String)
-        super(matched)
-      end
+    private def failure_message(actual)
+      "#{actual.label} is not nil"
+    end
 
-      # Information about the match.
-      def named_tuple
-        {
-          expected: NegatableMatchDataValue.new(nil),
-          actual:   @actual,
-        }
-      end
-
-      # Describes the condition that satisfies the matcher.
-      # This is informational and displayed to the end-user.
-      def message
-        "#{@actual_label} is nil"
-      end
-
-      # Describes the condition that won't satsify the matcher.
-      # This is informational and displayed to the end-user.
-      def negated_message
-        "#{@actual_label} is not nil"
-      end
+    private def failure_message_when_negated(actual)
+      "#{actual.label} is nil"
     end
   end
 end

src/spectator/matchers/reference_matcher.cr

@@ -4,43 +4,20 @@ module Spectator::Matchers
   # Matcher that tests whether two references are the same.
   # The values are compared with the `Reference#same?` method.
   struct ReferenceMatcher(ExpectedType) < ValueMatcher(ExpectedType)
-    # Determines whether the matcher is satisfied with the value given to it.
     private def match?(actual)
-      actual.same?(expected)
+      expected.value.same?(actual.value)
     end
 
-    # Determines whether the matcher is satisfied with the partial given to it.
-    def match(partial, negated = false)
-      values = ExpectedActual.new(partial, self)
-      MatchData.new(match?(values.actual), values)
+    def description
+      "is #{expected.label}"
     end
 
-    # Match data specific to this matcher.
-    private struct MatchData(ExpectedType, ActualType) < MatchData
-      # Creates the match data.
-      def initialize(matched, @values : ExpectedActual(ExpectedType, ActualType))
-        super(matched)
-      end
+    private def failure_message(actual)
+      "#{actual.label} is not #{expected.label}"
+    end
 
-      # Information about the match.
-      def named_tuple
-        {
-          expected: NegatableMatchDataValue.new(@values.expected),
-          actual:   @values.actual,
-        }
-      end
-
-      # Describes the condition that satisfies the matcher.
-      # This is informational and displayed to the end-user.
-      def message
-        "#{@values.actual_label} is #{@values.expected_label}"
-      end
-
-      # Describes the condition that won't satsify the matcher.
-      # This is informational and displayed to the end-user.
-      def negated_message
-        "#{@values.actual_label} is not #{@values.expected_label}"
-      end
+    private def failure_message_when_negated(actual)
+      "#{actual.label} is #{expected.label}"
     end
   end
 end

src/spectator/matchers/size_matcher.cr

@@ -4,39 +4,34 @@ module Spectator::Matchers
   # Matcher that tests whether a set has a specified number of elements.
   # The set's `#size` method is used for this check.
   struct SizeMatcher(ExpectedType) < ValueMatcher(ExpectedType)
-    # Determines whether the matcher is satisfied with the partial given to it.
-    def match(partial, negated = false)
-      actual = partial.actual.size
-      values = ExpectedActual.new(expected, label, actual, partial.label)
-      MatchData.new(actual == expected, values)
+    private def match?(actual)
+      expected.value == actual.value.size
     end
 
-    # Match data specific to this matcher.
-    private struct MatchData(ExpectedType, ActualType) < MatchData
-      # Creates the match data.
-      def initialize(matched, @values : ExpectedActual(ExpectedType, ActualType))
-        super(matched)
-      end
+    def description
+      "has size #{expected.label}"
+    end
 
-      # Information about the match.
-      def named_tuple
-        {
-          expected: NegatableMatchDataValue.new(@values.expected),
-          actual:   @values.actual,
-        }
-      end
+    private def failure_message(actual)
+      "#{actual.label} does not have #{expected.label} elements"
+    end
 
-      # Describes the condition that satisfies the matcher.
-      # This is informational and displayed to the end-user.
-      def message
-        "#{@values.actual_label} has #{@values.expected_label} elements"
-      end
+    private def failure_message_when_negated(actual)
+      "#{actual.label} has #{expected.label} elements"
+    end
 
-      # Describes the condition that won't satsify the matcher.
-      # This is informational and displayed to the end-user.
-      def negated_message
-        "#{@values.actual_label} does not have #{@values.expected_label} elements"
-      end
+    private def values(actual)
+      {
+        expected: expected.value.inspect,
+        actual:   actual.value.size.inspect,
+      }
+    end
+
+    private def negated_values(actual)
+      {
+        expected: "Not #{expected.value.inspect}",
+        actual:   actual.value.size.inspect,
+      }
     end
   end
 end

src/spectator/matchers/size_of_matcher.cr

@@ -4,40 +4,34 @@ module Spectator::Matchers
   # Matcher that tests whether a set has the same number of elements as another set.
   # The set's `#size` method is used for this check.
   struct SizeOfMatcher(ExpectedType) < ValueMatcher(ExpectedType)
-    # Determines whether the matcher is satisfied with the partial given to it.
-    def match(partial, negated = false)
-      actual = partial.actual.size
-      size = expected.size
-      values = ExpectedActual.new(size, label, actual, partial.label)
-      MatchData.new(actual == size, values)
+    private def match?(actual)
+      expected.value.size == actual.value.size
     end
 
-    # Match data specific to this matcher.
-    private struct MatchData(ExpectedType, ActualType) < MatchData
-      # Creates the match data.
-      def initialize(matched, @values : ExpectedActual(ExpectedType, ActualType))
-        super(matched)
-      end
+    def description
+      "is the same size as #{expected.label}"
+    end
 
-      # Information about the match.
-      def named_tuple
-        {
-          expected: NegatableMatchDataValue.new(@values.expected),
-          actual:   @values.actual,
-        }
-      end
+    private def failure_message(actual)
+      "#{actual.label} is not the same size as #{expected.label}"
+    end
 
-      # Describes the condition that satisfies the matcher.
-      # This is informational and displayed to the end-user.
-      def message
-        "#{@values.actual_label} has the same number of elements as #{@values.expected_label}"
-      end
+    private def failure_message_when_negated(actual)
+      "#{actual.label} is the same size as #{expected.label}"
+    end
 
-      # Describes the condition that won't satsify the matcher.
-      # This is informational and displayed to the end-user.
-      def negated_message
-        "#{@values.actual_label} has a different number of elements than #{@values.expected_label}"
-      end
+    private def values(actual)
+      {
+        expected: expected.value.size.inspect,
+        actual:   actual.value.size.inspect,
+      }
+    end
+
+    private def negated_values(actual)
+      {
+        expected: "Not #{expected.value.size.inspect}",
+        actual:   actual.value.size.inspect,
+      }
     end
   end
 end

src/spectator/matchers/type_matcher.cr

@@ -3,50 +3,35 @@ require "./matcher"
 module Spectator::Matchers
   # Matcher that tests a value is of a specified type.
   # The values are compared with the `Object#is_a?` method.
-  struct TypeMatcher(Expected) < Matcher
-    # Textual representation of what the matcher expects.
-    # The `Expected` type param will be used to populate the label.
-    def label
-      Expected.to_s
-    end
-
-    # Determines whether the matcher is satisfied with the value given to it.
+  struct TypeMatcher(Expected) < StandardMatcher
     private def match?(actual)
-      actual.is_a?(Expected)
+      actual.value.is_a?(Expected)
     end
 
-    # Determines whether the matcher is satisfied with the partial given to it.
-    def match(partial, negated = false)
-      actual = partial.actual
-      MatchData(Expected, typeof(actual)).new(match?(actual), actual, partial.label)
+    def description
+      "is as #{Expected}"
     end
 
-    # Match data specific to this matcher.
-    private struct MatchData(ExpectedType, ActualType) < MatchData
-      # Creates the match data.
-      def initialize(matched, @actual : ActualType, @actual_label : String)
-        super(matched)
-      end
+    private def failure_message(actual)
+      "#{actual.label} is not a #{Expected}"
+    end
 
-      # Information about the match.
-      def named_tuple
-        {
-          expected: NegatableMatchDataValue.new(ExpectedType),
-          actual:   @actual.class,
-        }
-      end
+    private def failure_message_when_negated(actual)
+      "#{actual.label} is a #{Expected}"
+    end
 
-      # Describes the condition that satisfies the matcher.
-      # This is informational and displayed to the end-user.
-      def message
-        "#{@actual_label} is a #{ExpectedType}"
-      end
+    private def values(actual)
+      {
+        expected: Expected.to_s,
+        actual:   actual.value.class.inspect,
+      }
+    end
 
-      # Describes the condition that won't satsify the matcher.
-      # This is informational and displayed to the end-user.
-      def negated_message
-        "#{@actual_label} is not a #{ExpectedType}"
-      end
+    private def negated_values(actual)
+      {
+        expected: "Not #{Expected}",
+        actual:   actual.value.class.inspect,
+      }
     end
   end
 end