Add specs for Thread.each_caller_location

Author: moozzi

core/thread/each_caller_location_spec.rb

@@ -0,0 +1,37 @@
+require_relative '../../spec_helper'
+
+describe "Thread.each_caller_location" do
+  ruby_version_is "3.2" do
+    context "starts at the default frame that caller_locations would start at and" do
+      it "yields Thread::Backtrace::Location" do
+        i = 0;
+        ecl = Thread.each_caller_location do |loc|
+          i += 1;
+          break loc if i == 1;
+        end
+
+        ecl.to_s.should == caller_locations(1, 1)[0].to_s
+        ecl.should be_kind_of(Thread::Backtrace::Location)
+      end
+
+      it "yields multiple Thread::Backtrace::Locations" do
+        i = 0;
+        ar = []
+        ecl = Thread.each_caller_location do |loc|
+          ar << loc;
+          i += 1;
+          break loc if i == 2;
+        end
+
+        ar.map(&:to_s).should == caller_locations(1..2).map(&:to_s)
+        ecl.should be_kind_of(Thread::Backtrace::Location)
+      end
+    end
+
+    it "raises StopIteration if reached an end" do
+      -> {
+        Thread.to_enum(:each_caller_location).next
+      }.should raise_error(StopIteration, "iteration reached an end")
+    end
+  end
+end