1 files changed, 18 insertions, 0 deletions
diff --git a/spec/ruby/core/file/printf_spec.rb b/spec/ruby/core/file/printf_spec.rb
new file mode 100644
index 0000000000..8423c010ab
--- /dev/null
+++ b/spec/ruby/core/file/printf_spec.rb
@@ -0,0 +1,18 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../../kernel/shared/sprintf', __FILE__)
+
+describe "File#printf" do
+  it_behaves_like :kernel_sprintf, -> (format, *args) {
+    begin
+      @filename = tmp("printf.txt")
+
+      File.open(@filename, "w", encoding: "utf-8") do |f|
+        f.printf(format, *args)
+      end
+
+      File.read(@filename, encoding: "utf-8")
+    ensure
+      rm_r @filename
+    end
+  }
+end