Move example filters from === to their own types

spec/line_example_filter_spec.cr

@@ -0,0 +1,21 @@
+require "./spec_helper"
+
+describe Spectator::LineExampleFilter do
+  describe "#includes?" do
+    context "with a matching example" do
+      it "is true" do
+        example = PassingExample.create
+        filter = Spectator::LineExampleFilter.new(example.source.line)
+        filter.includes?(example).should be_true
+      end
+    end
+
+    context "with a non-matching example" do
+      it "is false" do
+        example = PassingExample.create
+        filter = Spectator::LineExampleFilter.new(example.source.line + 5)
+        filter.includes?(example).should be_false
+      end
+    end
+  end
+end

spec/name_example_filter_spec.cr

@@ -0,0 +1,21 @@
+require "./spec_helper"
+
+describe Spectator::NameExampleFilter do
+  describe "#includes?" do
+    context "with a matching example" do
+      it "is true" do
+        example = PassingExample.create
+        filter = Spectator::NameExampleFilter.new(example.to_s)
+        filter.includes?(example).should be_true
+      end
+    end
+
+    context "with a non-matching example" do
+      it "is false" do
+        example = PassingExample.create
+        filter = Spectator::NameExampleFilter.new("BOGUS")
+        filter.includes?(example).should be_false
+      end
+    end
+  end
+end

spec/pending_example_spec.cr

@@ -119,66 +119,4 @@ describe Spectator::PendingExample do
       example.to_s.should contain(group.what.to_s)
     end
   end
-
-  describe "#===" do
-    context "with a matching Regex" do
-      it "is true" do
-        example = new_pending_example
-        regex = Regex.new(Regex.escape(example.what))
-        (example === regex).should be_true
-      end
-    end
-
-    context "with a non-matching Regex" do
-      it "is false" do
-        example = new_pending_example
-        regex = /BOGUS/
-        (example === regex).should be_false
-      end
-    end
-
-    context "with a String equal to the name" do
-      it "is true" do
-        example = new_pending_example
-        (example === example.to_s).should be_true
-      end
-    end
-
-    context "with a String different than the name" do
-      it "is false" do
-        example = new_pending_example
-        (example === "BOGUS").should be_false
-      end
-    end
-
-    context "with a matching source location" do
-      it "is true" do
-        example = new_pending_example
-        (example === example.source).should be_true
-      end
-    end
-
-    context "with a non-matching source location" do
-      it "is false" do
-        example = new_pending_example
-        source = Spectator::Source.new(__FILE__, __LINE__)
-        (example === source).should be_false
-      end
-    end
-
-    context "with a matching source line" do
-      it "is true" do
-        example = new_pending_example
-        (example === example.source.line).should be_true
-      end
-    end
-
-    context "with a non-matching source line" do
-      it "is false" do
-        example = new_pending_example
-        line = example.source.line + 5
-        (example === line).should be_false
-      end
-    end
-  end
 end

spec/runnable_example_spec.cr

@@ -1565,66 +1565,4 @@ describe Spectator::RunnableExample do
       end
     end
   end
-
-  describe "#===" do
-    context "with a matching Regex" do
-      it "is true" do
-        example = new_runnable_example
-        regex = Regex.new(Regex.escape(example.what))
-        (example === regex).should be_true
-      end
-    end
-
-    context "with a non-matching Regex" do
-      it "is false" do
-        example = new_runnable_example
-        regex = /BOGUS/
-        (example === regex).should be_false
-      end
-    end
-
-    context "with a String equal to the name" do
-      it "is true" do
-        example = new_runnable_example
-        (example === example.to_s).should be_true
-      end
-    end
-
-    context "with a String different than the name" do
-      it "is false" do
-        example = new_runnable_example
-        (example === "BOGUS").should be_false
-      end
-    end
-
-    context "with a matching source location" do
-      it "is true" do
-        example = new_runnable_example
-        (example === example.source).should be_true
-      end
-    end
-
-    context "with a non-matching source location" do
-      it "is false" do
-        example = new_runnable_example
-        source = Spectator::Source.new(__FILE__, __LINE__)
-        (example === source).should be_false
-      end
-    end
-
-    context "with a matching source line" do
-      it "is true" do
-        example = new_runnable_example
-        (example === example.source.line).should be_true
-      end
-    end
-
-    context "with a non-matching source line" do
-      it "is false" do
-        example = new_runnable_example
-        line = example.source.line + 5
-        (example === line).should be_false
-      end
-    end
-  end
 end

spec/source_example_filter_spec.cr

@@ -0,0 +1,22 @@
+require "./spec_helper"
+
+describe Spectator::SourceExampleFilter do
+  describe "#includes?" do
+    context "with a matching example" do
+      it "is true" do
+        example = PassingExample.create
+        filter = Spectator::SourceExampleFilter.new(example.source)
+        filter.includes?(example).should be_true
+      end
+    end
+
+    context "with a non-matching example" do
+      it "is false" do
+        example = PassingExample.create
+        source = Spectator::Source.new(__FILE__, __LINE__)
+        filter = Spectator::SourceExampleFilter.new(source)
+        filter.includes?(example).should be_false
+      end
+    end
+  end
+end

src/spectator/example.cr

@@ -59,21 +59,5 @@ module Spectator
     def to_json(json : ::JSON::Builder)
       json.string(to_s)
     end
-
-    # Checks if this example matches some criteria.
-    # This is used to filter examples.
-    def ===(other)
-      other === to_s
-    end
-
-    # Checks if this example is at the specified source.
-    def ===(other : Source)
-      source == other
-    end
-
-    # Checks if this example is at the specified line number.
-    def ===(other : Int32)
-      source.line === other
-    end
   end
 end

src/spectator/example_filter.cr

@@ -1,24 +1,9 @@
 module Spectator
-  # Checks examples to determine which should be run.
-  class ExampleFilter
-    # The criteria for filtering examples can be multiple types.
-    # A `String` will exact-match an example's name.
-    # A `Regex` will perform a regular expression match on the example's name.
-    # A `Source` will check if the example is in the specified file on a given line.
-    # An `Int32` will check if an example is on a given line.
-    alias Type = String | Regex | Source | Int32
-
-    # Creates the example filter.
-    # The *criteria* should be a list of what to filter on.
-    def initialize(@criteria = [] of Type)
-    end
-
+  # Base class for all example filters.
+  # Checks whether an example should be run.
+  # Sub-classes must implement the `#includes?` method.
+  abstract class ExampleFilter
     # Checks if an example is in the filter, and should be run.
-    def includes?(example)
-      return true if @criteria.empty?
-      @criteria.any? do |criterion|
-        example === criterion
-      end
-    end
+    abstract def includes?(example : Example) : Bool
   end
 end

src/spectator/includes.cr

@@ -28,7 +28,11 @@ require "./config"
 require "./config_builder"
 require "./config_source"
 require "./command_line_arguments_config_source"
+
 require "./example_filter"
+require "./source_example_filter"
+require "./line_example_filter"
+require "./name_example_filter"
 
 require "./example_failed"
 require "./expectation_failed"

src/spectator/line_example_filter.cr

@@ -0,0 +1,13 @@
+module Spectator
+  # Filter that matches examples on a given line.
+  class LineExampleFilter < ExampleFilter
+    # Creates the example filter.
+    def initialize(@line : Int32)
+    end
+
+    # Checks whether the example satisfies the filter.
+    def includes?(example)
+      @line == example.source.line
+    end
+  end
+end

src/spectator/name_example_filter.cr

@@ -0,0 +1,13 @@
+module Spectator
+  # Filter that matches examples based on their name.
+  class NameExampleFilter < ExampleFilter
+    # Creates the example filter.
+    def initialize(@name : String)
+    end
+
+    # Checks whether the example satisfies the filter.
+    def includes?(example)
+      @name == example.to_s
+    end
+  end
+end

src/spectator/source_example_filter.cr

@@ -0,0 +1,14 @@
+module Spectator
+  # Filter that matches examples in a given file and line.
+  class SourceExampleFilter < ExampleFilter
+    # Creates the filter.
+    # The *source* indicates which file and line the example must be on.
+    def initialize(@source : Source)
+    end
+
+    # Checks whether the example satisfies the filter.
+    def includes?(example)
+      @source === example.source
+    end
+  end
+end