1 files changed, 133 insertions, 0 deletions
diff --git a/test/openssl/ut_eof.rb b/test/openssl/ut_eof.rb
new file mode 100644
index 00000000..cf1f2d42
--- /dev/null
+++ b/test/openssl/ut_eof.rb
@@ -0,0 +1,133 @@
+# frozen_string_literal: true
+require 'test/unit'
+
+if defined?(OpenSSL)
+
+module OpenSSL::TestEOF
+  def test_eof_0
+    open_file("") {|f|
+      assert_equal("", f.read(0))
+      assert_equal("", f.read(0))
+      assert_equal("", f.read)
+      assert_equal("", f.read(0))
+      assert_equal("", f.read(0))
+    }
+    open_file("") {|f|
+      assert_nil(f.read(1))
+      assert_equal("", f.read)
+      assert_nil(f.read(1))
+    }
+    open_file("") {|f|
+      s = +"x"
+      assert_equal("", f.read(nil, s))
+      assert_equal("", s)
+    }
+    open_file("") {|f|
+      s = +"x"
+      assert_nil(f.read(10, s))
+      assert_equal("", s)
+    }
+  end
+
+  def test_eof_0_rw
+    return unless respond_to? :open_file_rw
+    open_file_rw("") {|f|
+      assert_equal("", f.read)
+      assert_equal("", f.read)
+      assert_equal(0, f.syswrite(""))
+      assert_equal("", f.read)
+    }
+  end
+
+  def test_eof_1
+    open_file("a") {|f|
+      assert_equal("", f.read(0))
+      assert_equal("a", f.read(1))
+      assert_equal("" , f.read(0))
+      assert_equal("" , f.read(0))
+      assert_equal("", f.read)
+      assert_equal("", f.read(0))
+      assert_equal("", f.read(0))
+    }
+    open_file("a") {|f|
+      assert_equal("a", f.read(1))
+      assert_nil(f.read(1))
+    }
+    open_file("a") {|f|
+      assert_equal("a", f.read(2))
+      assert_nil(f.read(1))
+      assert_equal("", f.read)
+      assert_nil(f.read(1))
+    }
+    open_file("a") {|f|
+      assert_equal("a", f.read)
+      assert_nil(f.read(1))
+      assert_equal("", f.read)
+      assert_nil(f.read(1))
+    }
+    open_file("a") {|f|
+      assert_equal("a", f.read(2))
+      assert_equal("", f.read)
+      assert_equal("", f.read)
+    }
+    open_file("a") {|f|
+      assert_equal("a", f.read)
+      assert_equal("", f.read(0))
+    }
+    open_file("a") {|f|
+      s = +"x"
+      assert_equal("a", f.read(nil, s))
+      assert_equal("a", s)
+    }
+    open_file("a") {|f|
+      s = +"x"
+      assert_equal("a", f.read(10, s))
+      assert_equal("a", s)
+    }
+  end
+
+  def test_eof_2
+    open_file("") {|f|
+      assert_equal("", f.read)
+      assert_predicate(f, :eof?)
+    }
+  end
+
+  def test_eof_3
+    open_file("") {|f|
+      assert_predicate(f, :eof?)
+    }
+  end
+
+  module Seek
+    def open_file_seek(content, pos)
+      open_file(content) do |f|
+        f.seek(pos)
+        yield f
+      end
+    end
+
+    def test_eof_0_seek
+      open_file_seek("", 10) {|f|
+        assert_equal(10, f.pos)
+        assert_equal("", f.read(0))
+        assert_equal("", f.read)
+        assert_equal("", f.read(0))
+        assert_equal("", f.read)
+      }
+    end
+
+    def test_eof_1_seek
+      open_file_seek("a", 10) {|f|
+        assert_equal("", f.read)
+        assert_equal("", f.read)
+      }
+      open_file_seek("a", 1) {|f|
+        assert_equal("", f.read)
+        assert_equal("", f.read)
+      }
+    end
+  end
+end
+
+end