More coverage tests & specs. (#7171)

* Add spec for eval and line coverage.

* Add test for main file coverage.

1 files changed, 7 insertions, 1 deletions

diff --git a/spec/ruby/library/coverage/start_spec.rb b/spec/ruby/library/coverage/start_spec.rb
index ddfad8b47c..a993abbf4e 100644
--- a/spec/ruby/library/coverage/start_spec.rb
+++ b/spec/ruby/library/coverage/start_spec.rb
@@ -2,5 +2,11 @@ require_relative '../../spec_helper'
 require 'coverage'
 
 describe 'Coverage.start' do
-  it 'needs to be reviewed for spec completeness'
+  ruby_version_is '3.2' do
+    it "can measure coverage within eval" do
+      Coverage.start(lines: true, eval: true)
+      eval("Object.new\n"*3, binding, "test.rb", 1)
+      Coverage.result["test.rb"].should == {lines: [1, 1, 1]}
+    end
+  end
 end