Bug 380783 - nsStringAPI.h: no equivalent of IsVoid (tell if string is null), patch by Mook <mook.moz+mozbz@gmail.com>, r=bsmedberg/dbaron, sr=dbaron, a1.9=bz

git-svn-id: svn://10.0.0.236/trunk@232323 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpcom/tests/TestStringAPI.cpp

@@ -0,0 +1,134 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is XPCOM external strings test.
+ *
+ * The Initial Developer of the Original Code is
+ * Mook <mook.moz@gmail.com>.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <cstdio>
+#include "nsStringAPI.h"
+
+#define CHECK(x) \
+  _doCheck(x, #x, __LINE__)
+
+int _doCheck(bool cond, const char* msg, int line) {
+  if (cond) return 0;
+  fprintf(stderr, "FAIL: line %d: %s\n", line, msg);
+  return 1;
+}
+
+int testEmpty() {
+  nsString s;
+  return CHECK(0 == s.Length()) +
+         CHECK(s.IsEmpty());
+}
+
+int testAccess() {
+  nsString s;
+  s.Assign(NS_LITERAL_STRING("hello"));
+  int res = CHECK(5 == s.Length()) +
+            CHECK(s.EqualsLiteral("hello"));
+  const PRUnichar *it, *end;
+  int len = s.BeginReading(&it, &end);
+  res += CHECK(5 == len);
+  res += CHECK(PRUnichar('h') == it[0]) +
+         CHECK(PRUnichar('e') == it[1]) +
+         CHECK(PRUnichar('l') == it[2]) +
+         CHECK(PRUnichar('l') == it[3]) +
+         CHECK(PRUnichar('o') == it[4]) +
+         CHECK(it + len == end);
+  res += CHECK(s[0] == s.First());
+  for (int i = 0; i < len; ++i) {
+    res += CHECK(s[i] == it[i]);
+    res += CHECK(s[i] == s.CharAt(i));
+  }
+  res += CHECK(it == s.BeginReading());
+  res += CHECK(end == s.EndReading());
+  return res;
+}
+
+int testWrite() {
+  nsString s(NS_LITERAL_STRING("xyzz"));
+  PRUnichar *begin, *end;
+  int res = CHECK(4 == s.Length());
+  PRUint32 len = s.BeginWriting(&begin, &end, 5);
+  res += CHECK(5 == s.Length()) +
+         CHECK(5 == len) +
+         CHECK(end == begin + 5) +
+         CHECK(begin == s.BeginWriting()) +
+         CHECK(end == s.EndWriting());
+  begin[4] = PRUnichar('y');
+  res += CHECK(s.Equals(NS_LITERAL_STRING("xyzzy")));
+  s.SetLength(4);
+  res += CHECK(4 == s.Length()) +
+         CHECK(s.Equals(NS_LITERAL_STRING("xyzz"))) +
+         CHECK(!s.Equals(NS_LITERAL_STRING("xyzzy"))) +
+         CHECK(!s.IsEmpty());
+  s.Truncate();
+  res += CHECK(0 == s.Length()) +
+         CHECK(s.IsEmpty());
+  const PRUnichar sample[] = { 's', 'a', 'm', 'p', 'l', 'e', '\0' };
+  s.Assign(sample);
+  res += CHECK(s.EqualsLiteral("sample"));
+  s.Assign(sample, 4);
+  res += CHECK(s.EqualsLiteral("samp"));
+  s.Assign(PRUnichar('q'));
+  res += CHECK(s.EqualsLiteral("q"));
+  return res;
+}
+
+int testVoid() {
+  nsString s;
+  int ret = CHECK(!s.IsVoid());
+  s.SetIsVoid(PR_FALSE);
+  ret += CHECK(!s.IsVoid());
+  s.SetIsVoid(PR_TRUE);
+  ret += CHECK(s.IsVoid());
+  s.SetIsVoid(PR_FALSE);
+  ret += CHECK(!s.IsVoid());
+  s.SetIsVoid(PR_TRUE);
+  s.AssignLiteral("hello");
+  ret += CHECK(!s.IsVoid());
+  return ret;
+}
+
+int main() {
+  int rv = 0;
+  rv += testEmpty();
+  rv += testAccess();
+  rv += testWrite();
+  rv += testVoid();
+  if (0 == rv) {
+    fprintf(stderr, "PASS: StringAPI tests\n");
+  }
+  return rv;
+}