Small spec to check let() still works in nested groups

opal/opal/rspec/fixes.rb

@@ -21,3 +21,11 @@ def underscore(camel_cased_word)
     word
   end
 end
+
+# Opal does not yet support $1..$9 backrefs
+class RSpec::Matchers::BuiltIn::BePredicate
+  def prefix_and_expected(symbol)
+    symbol.to_s =~ /^(be_(an?_)?)(.*)/
+    return $~[1], $~[3]
+  end
+end

spec/example_spec.rb

@@ -137,3 +137,13 @@ def some_helper
     lambda { raise "wtf son" }.should raise_error(Exception)
   end
 end
+
+describe "let on an inner scope" do
+  describe "inner context" do
+    let(:foo) { :bar }
+
+    it "should still work" do
+      foo.should eq(:bar)
+    end
+  end
+end