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-rw-r--r--spec/ruby/core/file/open_spec.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/spec/ruby/core/file/open_spec.rb b/spec/ruby/core/file/open_spec.rb
index 93f1972ac6..e3c5618795 100644
--- a/spec/ruby/core/file/open_spec.rb
+++ b/spec/ruby/core/file/open_spec.rb
@@ -623,6 +623,14 @@ describe "File.open" do
end
end
+ ruby_version_is "2.5" do
+ it "raises ArgumentError if mixing :newline and binary mode" do
+ -> {
+ File.open(@file, "rb", newline: :universal) {}
+ }.should raise_error(ArgumentError, "newline decorator with binary mode")
+ end
+ end
+
ruby_version_is "2.6" do
context "'x' flag" do
before :each do