2 files changed, 20 insertions, 0 deletions
diff --git a/spec/ruby/library/objectspace/fixtures/trace.rb b/spec/ruby/library/objectspace/fixtures/trace.rb
new file mode 100644
index 0000000000..fd4524b0ba
--- /dev/null
+++ b/spec/ruby/library/objectspace/fixtures/trace.rb
@@ -0,0 +1,5 @@
+require "objspace/trace"
+a = "foo"
+b = "b" + "a" + "r"
+c = 42
+p a, b, c
diff --git a/spec/ruby/library/objectspace/trace_spec.rb b/spec/ruby/library/objectspace/trace_spec.rb
new file mode 100644
index 0000000000..59952a006c
--- /dev/null
+++ b/spec/ruby/library/objectspace/trace_spec.rb
@@ -0,0 +1,15 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "3.1" do
+  describe 'require "objspace/trace"' do
+    it "shows object allocation sites" do
+      file = fixture(__FILE__ , "trace.rb")
+      ruby_exe(file, args: "2>&1").lines(chomp: true).should == [
+        "objspace/trace is enabled",
+        "\"foo\" @ #{file}:2",
+        "\"bar\" @ #{file}:3",
+        "42"
+      ]
+    end
+  end
+end