From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/test/-ext-/string/test_cstr.rb | 119 ++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 jni/ruby/test/-ext-/string/test_cstr.rb

(limited to 'jni/ruby/test/-ext-/string/test_cstr.rb')

diff --git a/jni/ruby/test/-ext-/string/test_cstr.rb b/jni/ruby/test/-ext-/string/test_cstr.rb
new file mode 100644
index 0000000..272e090
--- /dev/null
+++ b/jni/ruby/test/-ext-/string/test_cstr.rb
@@ -0,0 +1,119 @@
+require 'test/unit'
+require "-test-/string/string"
+
+class Test_StringCStr < Test::Unit::TestCase
+  Bug4319 = '[ruby-dev:43094]'
+
+  def test_embed
+    s = Bug::String.new("abcdef")
+    s.set_len(3)
+    assert_equal(0, s.cstr_term, Bug4319)
+  end
+
+  def test_long
+    s = Bug::String.new("abcdef")*100000
+    assert_equal(0, s.cstr_term, Bug4319)
+  end
+
+  WCHARS = [Encoding::UTF_16BE, Encoding::UTF_16LE, Encoding::UTF_32BE, Encoding::UTF_32LE]
+
+  def test_wchar_embed
+    WCHARS.each do |enc|
+      s = Bug::String.new("\u{4022}a".encode(enc))
+      assert_nothing_raised(ArgumentError) {s.cstr_term}
+      s.set_len(s.bytesize / 2)
+      assert_equal(1, s.size)
+      assert_equal(0, s.cstr_term)
+    end
+  end
+
+  def test_wchar_long
+    str = "\u{4022}abcdef"
+    n = 100
+    len = str.size * n
+    WCHARS.each do |enc|
+      s = Bug::String.new(str.encode(enc))*n
+      assert_nothing_raised(ArgumentError, enc.name) {s.cstr_term}
+      s.set_len(s.bytesize / 2)
+      assert_equal(len / 2, s.size, enc.name)
+      assert_equal(0, s.cstr_term, enc.name)
+    end
+  end
+
+  def test_wchar_lstrip!
+    assert_wchars_term_char(" a") {|s| s.lstrip!}
+  end
+
+  def test_wchar_rstrip!
+    assert_wchars_term_char("a ") {|s| s.rstrip!}
+  end
+
+  def test_wchar_chop!
+    assert_wchars_term_char("a\n") {|s| s.chop!}
+  end
+
+  def test_wchar_chomp!
+    assert_wchars_term_char("a\n") {|s| s.chomp!}
+  end
+
+  def test_wchar_aset
+    assert_wchars_term_char("a"*30) {|s| s[29,1] = ""}
+  end
+
+  def test_wchar_sub!
+    assert_wchars_term_char("foobar") {|s| s.sub!(/#{"foo".encode(s.encoding)}/, "")}
+  end
+
+  def test_wchar_delete!
+    assert_wchars_term_char("foobar") {|s| s.delete!("ao".encode(s.encoding))}
+  end
+
+  def test_wchar_squeeze!
+    assert_wchars_term_char("foo!") {|s| s.squeeze!}
+  end
+
+  def test_wchar_tr!
+    assert_wchars_term_char("\u{3042}foobar") {|s|
+      enc = s.encoding
+      s.tr!("\u{3042}".encode(enc), "c".encode(enc))
+    }
+  end
+
+  def test_wchar_tr_s!
+    assert_wchars_term_char("\u{3042}foobar") {|s|
+      enc = s.encoding
+      s.tr_s!("\u{3042}".encode(enc), "c".encode(enc))
+    }
+  end
+
+  def test_embedded_from_heap
+    gh821 = "[GH-821]"
+    embedded_string = "abcdefghi"
+    string = embedded_string.gsub("efg", "123")
+    {}[string] = 1
+    non_terminated = "#{string}#{nil}"
+    assert_nil(Bug::String.cstr_term_char(non_terminated), gh821)
+
+    result = {}
+    WCHARS.map do |enc|
+      embedded_string = "ab".encode(enc)
+      string = embedded_string.gsub("b".encode(enc), "1".encode(enc))
+      {}[string] = 1
+      non_terminated = "#{string}#{nil}"
+      c = Bug::String.cstr_term_char(non_terminated)
+      result[enc] = c if c
+    end
+    assert_empty(result, gh821)
+  end
+
+  def assert_wchars_term_char(str)
+    result = {}
+    WCHARS.map do |enc|
+      s = Bug::String.new(str.encode(enc))
+      yield s
+      c = s.cstr_term_char
+      result[enc] = c if c
+    end
+    assert_empty(result)
+  end
+end
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