diff options
author | Jeremy Evans <code@jeremyevans.net> | 2019-04-06 00:02:11 -0700 |
---|---|---|
committer | Jeremy Evans <code@jeremyevans.net> | 2019-05-26 11:09:21 -0700 |
commit | 39eadca76b48fc7841da688f6745e40897ec37ff (patch) | |
tree | 5c29107b29f5384eedb390af636186e7877369f3 /spec | |
parent | 897901283c79e5f5f33656abdd453dc272268748 (diff) |
Add FrozenError#receiver
Similar to NameError#receiver, this returns the object on which
the modification was attempted. This is useful as it can pinpoint
exactly what is frozen. In many cases when a FrozenError is
raised, you cannot determine from the context which object is
frozen that you attempted to modify.
Users of the current rb_error_frozen C function will have to switch
to using rb_error_frozen_object or the new rb_frozen_error_raise
in order to set the receiver of the FrozenError.
To allow the receiver to be set from Ruby, support an optional
second argument to FrozenError#initialize.
Implements [Feature #15751]
Diffstat (limited to 'spec')
-rw-r--r-- | spec/ruby/core/exception/frozen_error_spec.rb | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/frozen_error_spec.rb b/spec/ruby/core/exception/frozen_error_spec.rb new file mode 100644 index 0000000000..7b356253c4 --- /dev/null +++ b/spec/ruby/core/exception/frozen_error_spec.rb @@ -0,0 +1,34 @@ +require_relative '../../spec_helper' + +describe "FrozenError" do + ruby_version_is "2.5" do + it "is a subclass of RuntimeError" do + RuntimeError.should be_ancestor_of(FrozenError) + end + end +end + +describe "FrozenError.new" do + ruby_version_is "2.7" do + it "should take optional receiver argument" do + o = Object.new + FrozenError.new("msg", o).receiver.should equal(o) + end + end +end + +describe "FrozenError#receiver" do + ruby_version_is "2.7" do + it "should return frozen object that modification was attempted on" do + o = Object.new.freeze + begin + def o.x; end + rescue => e + e.should be_kind_of(FrozenError) + e.receiver.should equal(o) + else + raise + end + end + end +end |