1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/full_message_spec.rb b/spec/ruby/core/exception/full_message_spec.rb
new file mode 100644
index 0000000000..f56282d67b
--- /dev/null
+++ b/spec/ruby/core/exception/full_message_spec.rb
@@ -0,0 +1,38 @@
+require_relative '../../spec_helper'
+
+ruby_version_is "2.5" do
+  describe "Exception#full_message" do
+    it "returns formatted string of exception using the same format that is used to print an uncaught exceptions to stderr" do
+      e = RuntimeError.new("Some runtime error")
+      e.set_backtrace(["a.rb:1", "b.rb:2"])
+
+      full_message = e.full_message
+      full_message.should include "RuntimeError"
+      full_message.should include "Some runtime error"
+      full_message.should include "a.rb:1"
+      full_message.should include "b.rb:2"
+    end
+
+    ruby_version_is "2.5.1" do
+      it "supports :highlight option and adds escape sequences to highlight some strings" do
+        e = RuntimeError.new("Some runtime error")
+
+        full_message = e.full_message(highlight: true, order: :bottom)
+        full_message.should include "\e[1mTraceback\e[m (most recent call last)"
+        full_message.should include "\e[1mSome runtime error (\e[1;4mRuntimeError\e[m\e[1m)"
+
+        full_message = e.full_message(highlight: false, order: :bottom)
+        full_message.should include "Traceback (most recent call last)"
+        full_message.should include "Some runtime error (RuntimeError)"
+      end
+
+      it "supports :order option and places the error message and the backtrace at the top or the bottom" do
+        e = RuntimeError.new("Some runtime error")
+        e.set_backtrace(["a.rb:1", "b.rb:2"])
+
+        e.full_message(order: :top,    highlight: false).should =~ /a.rb:1.*b.rb:2/m
+        e.full_message(order: :bottom, highlight: false).should =~ /b.rb:2.*a.rb:1/m
+      end
+    end
+  end
+end