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-rw-r--r--spec/support/matchers/be_a_binary_string.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/spec/support/matchers/be_a_binary_string.rb b/spec/support/matchers/be_a_binary_string.rb
index f041ae76167..6195c6c7554 100644
--- a/spec/support/matchers/be_a_binary_string.rb
+++ b/spec/support/matchers/be_a_binary_string.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
RSpec::Matchers.define :be_a_binary_string do |_|
match do |actual|
actual.is_a?(String) && actual.encoding == Encoding.find('ASCII-8BIT')