Proper MB_CUR_MAX.

Previously this was hard coded to 4. This is only the case for UTF-8
locales.

As a side effect, this properly reports C.UTF-8 as the default locale
instead of C.

Change-Id: I7c73cc8fe6ffac61d211cd5f75287e36de06f4fc

1 files changed, 19 insertions, 2 deletions

diff --git a/tests/locale_test.cpp b/tests/locale_test.cpp
index 7d063f9dd..325f6ceda 100644
--- a/tests/locale_test.cpp
+++ b/tests/locale_test.cpp
@@ -48,8 +48,8 @@ TEST(locale, localeconv) {
 }
 
 TEST(locale, setlocale) {
-  EXPECT_STREQ("C", setlocale(LC_ALL, NULL));
-  EXPECT_STREQ("C", setlocale(LC_CTYPE, NULL));
+  EXPECT_STREQ("C.UTF-8", setlocale(LC_ALL, NULL));
+  EXPECT_STREQ("C.UTF-8", setlocale(LC_CTYPE, NULL));
 
   errno = 0;
   EXPECT_EQ(NULL, setlocale(-1, NULL));
@@ -105,3 +105,20 @@ TEST(locale, uselocale) {
 
   EXPECT_EQ(n, uselocale(NULL));
 }
+
+TEST(locale, mb_cur_max) {
+  // We can't reliably test the behavior with setlocale(3) or the behavior for
+  // initial program conditions because (unless we're the only test that was
+  // run), another test has almost certainly called uselocale(3) in this thread.
+  // See b/16685652.
+  locale_t cloc = newlocale(LC_ALL, "C", 0);
+  locale_t cloc_utf8 = newlocale(LC_ALL, "C.UTF-8", 0);
+
+  uselocale(cloc);
+  ASSERT_EQ(1U, MB_CUR_MAX);
+  uselocale(cloc_utf8);
+  ASSERT_EQ(4U, MB_CUR_MAX);
+
+  freelocale(cloc);
+  freelocale(cloc_utf8);
+}