Allow matching any line number of example in filter

spec/line_number_spec.cr

@@ -5,15 +5,19 @@ Spectator.describe Spectator do
   subject(source) { current_example.source }
 
   context "line numbers" do
-    subject { source.line }
+    it "contains starting line of spec" do
+      expect(source.line).to eq(__LINE__ - 1)
+    end
 
-    it "match source code" do
-      is_expected.to eq(__LINE__ - 1)
+    it "contains ending line of spec" do
+      expect(source.end_line).to eq(__LINE__ + 1)
     end
 
     it "handles multiple lines and examples" do
       # Offset is important.
-      is_expected.to eq(__LINE__ - 2)
+      expect(source.line).to eq(__LINE__ - 2)
+      expect(source.end_line).to eq(__LINE__ + 2)
+      # Offset is still important.
     end
   end
 

src/spectator/dsl/examples.cr

@@ -19,9 +19,9 @@ module Spectator
       {% end %}
 
       {% if block.is_a?(Nop) %}
-        %source = ::Spectator::Source.new({{description.filename}}, {{description.line_number}})
+        %source = ::Spectator::Source.new({{description.filename}}, line: {{description.line_number}}, end_line: {{description.end_line_number}})
       {% else %}
-        %source = ::Spectator::Source.new({{block.filename}}, {{block.line_number}})
+        %source = ::Spectator::Source.new({{block.filename}}, line: {{block.line_number}}, end_line: {{block.end_line_number}})
       {% end %}
       ::Spectator::SpecBuilder.add_example(
         {{description.is_a?(StringLiteral) || description.is_a?(StringInterpolation) || description.is_a?(NilLiteral) ? description : description.stringify}},
@@ -50,9 +50,9 @@ module Spectator
       {% end %}
 
       {% if block.is_a?(Nop) %}
-        %source = ::Spectator::Source.new({{description.filename}}, {{description.line_number}})
+        %source = ::Spectator::Source.new({{description.filename}}, line: {{description.line_number}}, end_line: {{description.end_line_number}})
       {% else %}
-        %source = ::Spectator::Source.new({{block.filename}}, {{block.line_number}})
+        %source = ::Spectator::Source.new({{block.filename}}, line: {{block.line_number}}, end_line: {{block.end_line_number}})
       {% end %}
       ::Spectator::SpecBuilder.add_pending_example(
         {{description.is_a?(StringLiteral) || description.is_a?(StringInterpolation) || description.is_a?(NilLiteral) ? description : description.stringify}},

src/spectator/line_example_filter.cr

@@ -7,7 +7,13 @@ module Spectator
 
     # Checks whether the example satisfies the filter.
     def includes?(example) : Bool
-      @line == example.source.line
+      source = example.source
+      # end_line is present so there is a range to check against
+      if end_line = source.end_line
+        (source.line..end_line).covers?(@line)
+      else
+        source.line == @line
+      end
     end
   end
 end

src/spectator/source.cr

@@ -5,10 +5,14 @@ module Spectator
     getter file : String
 
     # Line number in the file.
+    # If end_line is present, this is the starting line
     getter line : Int32
 
+    # Ending line number in the file.
+    getter end_line : Int32?
+
     # Creates the source.
-    def initialize(@file, @line)
+    def initialize(@file, @line, @end_line = nil)
     end
 
     # Parses a source from a string.