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add AS::SafeBuffer#clone_empty

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commit baf69031dd9ef306d03e8a801da69fe7e3b9f962 1 parent 1be2bbe
@amatsuda amatsuda authored tenderlove committed
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6 activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -101,6 +101,12 @@ def initialize_copy(other)
@dirty = other.dirty?
end
+ def clone_empty
+ new_safe_buffer = self[0, 0]
+ new_safe_buffer.instance_variable_set(:@dirty, @dirty)
+ new_safe_buffer
+ end
+
def concat(value)
if dirty? || value.html_safe?
super(value)
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9 activesupport/test/safe_buffer_test.rb
@@ -102,4 +102,13 @@ def setup
@buffer.safe_concat "BUSTED"
end
end
+
+ test "clone_empty returns an empty buffer" do
+ assert_equal '', ActiveSupport::SafeBuffer.new('foo').clone_empty
+ end
+
+ test "clone_empty keeps the original dirtyness" do
+ assert @buffer.clone_empty.html_safe?
+ assert !@buffer.gsub!('', '').clone_empty.html_safe?
+ end
end
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