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-rw-r--r--spec/ruby/core/encoding/converter/primitive_convert_spec.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/converter/primitive_convert_spec.rb b/spec/ruby/core/encoding/converter/primitive_convert_spec.rb
index 802d8e7cb1..ab34ebf33f 100644
--- a/spec/ruby/core/encoding/converter/primitive_convert_spec.rb
+++ b/spec/ruby/core/encoding/converter/primitive_convert_spec.rb
@@ -14,6 +14,10 @@ describe "Encoding::Converter#primitive_convert" do
-> { @ec.primitive_convert("","") }.should_not raise_error
end
+ it "raises FrozenError when the destination buffer is a frozen String" do
+ -> { @ec.primitive_convert("", "".freeze) }.should raise_error(FrozenError)
+ end
+
it "accepts nil for the destination byte offset" do
-> { @ec.primitive_convert("","", nil) }.should_not raise_error
end