1 files changed, 53 insertions, 3 deletions
diff --git a/test/csv/test_interface.rb b/test/csv/test_interface.rb
index be27fcd616..912e2ec7f5 100755
--- a/test/csv/test_interface.rb
+++ b/test/csv/test_interface.rb
@@ -4,9 +4,7 @@
 
 # tc_interface.rb
 #
-#  Created by James Edward Gray II on 2005-10-31.
-#  Copyright 2005 James Edward Gray II. You can redistribute or modify this code
-#  under the terms of Ruby's license.
+# Created by James Edward Gray II on 2005-10-31.
 
 require_relative "base"
 require "tempfile"
@@ -64,6 +62,55 @@ class TestCSV::Interface < TestCSV
     assert_equal("Return value.", ret)
   end
 
+  def test_open_encoding_valid
+    # U+1F600 GRINNING FACE
+    # U+1F601 GRINNING FACE WITH SMILING EYES
+    File.open(@path, "w") do |file|
+      file << "\u{1F600},\u{1F601}"
+    end
+    CSV.open(@path, encoding: "utf-8") do |csv|
+      assert_equal([["\u{1F600}", "\u{1F601}"]],
+                   csv.to_a)
+    end
+  end
+
+  def test_open_encoding_invalid
+    # U+1F600 GRINNING FACE
+    # U+1F601 GRINNING FACE WITH SMILING EYES
+    File.open(@path, "w") do |file|
+      file << "\u{1F600},\u{1F601}"
+    end
+    CSV.open(@path, encoding: "EUC-JP") do |csv|
+      error = assert_raise(CSV::MalformedCSVError) do
+        csv.shift
+      end
+      assert_equal("Invalid byte sequence in EUC-JP in line 1.",
+                   error.message)
+    end
+  end
+
+  def test_open_encoding_nonexistent
+    _output, error = capture_io do
+      CSV.open(@path, encoding: "nonexistent") do
+      end
+    end
+    assert_equal("path:0: warning: Unsupported encoding nonexistent ignored\n",
+                 error.gsub(/\A.+:\d+: /, "path:0: "))
+  end
+
+  def test_open_encoding_utf_8_with_bom
+    # U+FEFF ZERO WIDTH NO-BREAK SPACE, BOM
+    # U+1F600 GRINNING FACE
+    # U+1F601 GRINNING FACE WITH SMILING EYES
+    File.open(@path, "w") do |file|
+      file << "\u{FEFF}\u{1F600},\u{1F601}"
+    end
+    CSV.open(@path, encoding: "bom|utf-8") do |csv|
+      assert_equal([["\u{1F600}", "\u{1F601}"]],
+                   csv.to_a)
+    end
+  end
+
   def test_parse
     data = File.binread(@path)
     assert_equal( @expected,
@@ -161,6 +208,9 @@ class TestCSV::Interface < TestCSV
       assert_equal(csv, csv << ["last", %Q{"row"}])
     end
     assert_equal(%Q{1,2,3\n4,,5\nlast,"""row"""\n}, str)
+
+    out = CSV.generate("test") { |csv| csv << ["row"] }
+    assert_equal("testrow\n", out)
   end
 
   def test_generate_line