Merge pull request #296 from jekyll/copilot/fix-date-formatting-compatibility

[WIP] Fix backwards compatibility in date formatting

Author: benbalter

lib/jekyll-github-metadata/value.rb

@@ -34,7 +34,7 @@ def render
 
       def to_liquid
         case render
-        when nil, true, false, Hash, String, Numeric, Array
+        when nil, true, false, Hash, String, Numeric, Array, Time
           value
         else
           to_json

spec/value_spec.rb

@@ -11,6 +11,7 @@
   let(:nil_value_without_key) { described_class.new(nil) }
   let(:nil_value_with_key) { described_class.new("my_key", nil) }
   let(:key_and_value)      { described_class.new("my_key2", proc { "leonard told me" }) }
+  let(:time_value)         { described_class.new(Time.utc(2025, 1, 29, 12, 0, 0)) }
 
   it "takes in a value and stores it" do
     v = described_class.new("some_value")
@@ -55,6 +56,16 @@
     expect(hash_value.render).to eql("hello" => "world")
   end
 
+  it "does not modify a time value" do
+    expect(time_value.render).to be_a(Time)
+    expect(time_value.render).to eql(Time.utc(2025, 1, 29, 12, 0, 0))
+  end
+
+  it "returns Time objects directly from to_liquid for date filter compatibility" do
+    expect(time_value.to_liquid).to be_a(Time)
+    expect(time_value.to_liquid).to eql(Time.utc(2025, 1, 29, 12, 0, 0))
+  end
+
   it "accepts a nil value with no key" do
     expect(nil_value_without_key.key).to eql("{anonymous}")
     expect(nil_value_without_key.render).to be_nil