1 files changed, 35 insertions, 0 deletions
diff --git a/spec/ruby/core/regexp/timeout_spec.rb b/spec/ruby/core/regexp/timeout_spec.rb
new file mode 100644
index 0000000000..6fce261814
--- /dev/null
+++ b/spec/ruby/core/regexp/timeout_spec.rb
@@ -0,0 +1,35 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "3.2" do
+  describe "Regexp.timeout" do
+    after :each do
+      Regexp.timeout = nil
+    end
+
+    it "returns global timeout" do
+      Regexp.timeout = 3
+      Regexp.timeout.should == 3
+    end
+
+    it "raises Regexp::TimeoutError after global timeout elapsed" do
+      Regexp.timeout = 0.001
+      Regexp.timeout.should == 0.001
+
+      -> {
+        # A typical ReDoS case
+        /^(a*)*$/ =~ "a" * 1000000 + "x"
+      }.should raise_error(Regexp::TimeoutError, "regexp match timeout")
+    end
+
+    it "raises Regexp::TimeoutError after timeout keyword value elapsed" do
+      Regexp.timeout = 3 # This should be ignored
+      Regexp.timeout.should == 3
+
+      re = Regexp.new("^a*b?a*$", timeout: 0.001)
+
+      -> {
+        re =~ "a" * 1000000 + "x"
+      }.should raise_error(Regexp::TimeoutError, "regexp match timeout")
+    end
+  end
+end