1 files changed, 74 insertions, 0 deletions
diff --git a/spec/ruby/optional/capi/debug_spec.rb b/spec/ruby/optional/capi/debug_spec.rb
new file mode 100644
index 0000000000..14ba25609c
--- /dev/null
+++ b/spec/ruby/optional/capi/debug_spec.rb
@@ -0,0 +1,74 @@
+require_relative 'spec_helper'
+
+load_extension('debug')
+
+describe "C-API Debug function" do
+  before :each do
+    @o = CApiDebugSpecs.new
+  end
+
+  describe "rb_debug_inspector_open" do
+    it "creates a debug context and calls the given callback" do
+      @o.rb_debug_inspector_open(42).should be_kind_of(Array)
+      @o.debug_spec_callback_data.should == 42
+    end
+  end
+
+  describe "rb_debug_inspector_frame_self_get" do
+    it "returns self" do
+      @o.rb_debug_inspector_frame_self_get(0).should == @o
+      @o.rb_debug_inspector_frame_self_get(1).should == self
+    end
+  end
+
+  describe "rb_debug_inspector_frame_class_get" do
+    it "returns the frame class" do
+      @o.rb_debug_inspector_frame_class_get(0).should == CApiDebugSpecs
+    end
+  end
+
+  describe "rb_debug_inspector_frame_binding_get" do
+    it "returns the current binding" do
+      a = "test"
+      b = @o.rb_debug_inspector_frame_binding_get(1)
+      b.should be_an_instance_of(Binding)
+      b.local_variable_get(:a).should == "test"
+    end
+
+    it "matches the locations in rb_debug_inspector_backtrace_locations" do
+      frames = @o.rb_debug_inspector_open(42)
+      frames.each do |_s, klass, binding, iseq, backtrace_location|
+        if binding
+          # YJIT modifies Array#each backtraces but leaves its source_location as is
+          unless defined?(RubyVM::YJIT) && klass == Array && iseq.label == "each"
+            binding.source_location.should == [backtrace_location.path, backtrace_location.lineno]
+          end
+          method_name = binding.eval('__method__')
+          if method_name
+            method_name.should == backtrace_location.base_label.to_sym
+          end
+        end
+      end
+    end
+  end
+
+  describe "rb_debug_inspector_frame_iseq_get" do
+    it "returns an InstructionSequence" do
+      if defined?(RubyVM::InstructionSequence)
+        @o.rb_debug_inspector_frame_iseq_get(1).should be_an_instance_of(RubyVM::InstructionSequence)
+      else
+        @o.rb_debug_inspector_frame_iseq_get(1).should == nil
+      end
+    end
+  end
+
+  describe "rb_debug_inspector_backtrace_locations" do
+    it "returns an array of Thread::Backtrace::Location" do
+      bts = @o.rb_debug_inspector_backtrace_locations
+      bts.should_not.empty?
+      bts.each { |bt| bt.should be_kind_of(Thread::Backtrace::Location) }
+      location = "#{__FILE__}:#{__LINE__ - 3}"
+      bts[1].to_s.should include(location)
+    end
+  end
+end