Add CompositeExampleFilter

src/spectator/composite_example_filter.cr

@@ -0,0 +1,13 @@
+module Spectator
+  # Filter that combines multiple other filters.
+  class CompositeExampleFilter < ExampleFilter
+    # Creates the example filter.
+    def initialize(@filters : Array(ExampleFilter))
+    end
+
+    # Checks whether the example satisfies the filter.
+    def includes?(example)
+      @filters.any?(&.includes?(example))
+    end
+  end
+end

src/spectator/includes.cr

@@ -34,6 +34,7 @@ require "./source_example_filter"
 require "./line_example_filter"
 require "./name_example_filter"
 require "./null_example_filter"
+require "./composite_example_filter"
 
 require "./example_failed"
 require "./expectation_failed"