Add specs for Thread.each_caller_location

Author: moozzi

core/thread/each_caller_location_spec.rb

@@ -0,0 +1,81 @@
+require_relative '../../spec_helper'
+
+describe "Thread.each_caller_location" do
+  ruby_version_is "3.2" do
+    it "iterates through the current execution stack and matches caller_locations content and type" do
+      ar = []
+      Thread.each_caller_location { ar << _1; }
+
+      ar.map(&:to_s).should == caller_locations.map(&:to_s)
+      ar[0].should be_kind_of(Thread::Backtrace::Location)
+    end
+
+    it "returns subset of 'Thread.to_enum(:each_caller_location)' locations" do
+      i = 0
+      ar = []
+      ecl = Thread.each_caller_location do |x|
+        ar << x
+        i += 1
+        break x if i == 1
+      end
+
+      Thread.to_enum(:each_caller_location).to_a.map(&:to_s).should include(ecl.to_s)
+    end
+
+    it "stops the backtrace iteration if 'break' occurs" do
+      i = 0
+      ar = []
+      ecl = Thread.each_caller_location do |x|
+        ar << x
+        i += 1
+        break x 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
+
+    it "show multiple block farames" do
+      i = 0
+      ar = []
+      cl = nil
+      ecl = nil
+
+      -> {
+        -> {
+          cl = caller_locations(1, 2)
+          ecl = Thread.each_caller_location do |x|
+            ar << x
+            i += 1
+            break x if i == 2
+          end
+        }.()
+      }.()
+
+      cl.map(&:to_s).should == ar.map(&:to_s)
+      ecl.should be_kind_of(Thread::Backtrace::Location)
+    end
+
+    it "returns nil unconditionally" do
+      Thread.each_caller_location {}.should == nil
+    end
+
+    it "raises StopIteration at the first invocation of 'next'" do
+      -> {
+        Thread.to_enum(:each_caller_location).next
+      }.should raise_error(StopIteration, "iteration reached an end")
+    end
+
+    it "raises LocalJumpError when called without a block" do
+      -> {
+        Thread.each_caller_location
+      }.should raise_error(LocalJumpError, "no block given")
+    end
+
+    it "doesn't accept positional and keyword arguments" do
+      -> {
+        Thread.each_caller_location(12, foo: 10) {}
+      }.should raise_error(ArgumentError, "wrong number of arguments (given 2, expected 0)")
+    end
+  end
+end