gecko-dev/xpcom/tests/TestTArray.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* ***** 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 C++ array template tests.
 *
 * The Initial Developer of the Original Code is Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Darin Fisher <darin@meer.net>
 *
 * 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 <stdlib.h>
#include <stdio.h>
#include "nsTArray.h"
#include "nsTPtrArray.h"
#include "nsMemory.h"
#include "nsAutoPtr.h"
#include "nsString.h"
#include "nsDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsXPCOM.h"
#include "nsILocalFile.h"

namespace TestTArray {

// Define this so we can use test_basic_array in test_comptr_array
template <class T>
inline bool operator<(const nsCOMPtr<T>& lhs, const nsCOMPtr<T>& rhs) {
  return lhs.get() < rhs.get();
}

//----

template <class ElementType>
static PRBool test_basic_array(ElementType *data,
                               PRUint32 dataLen,
                               const ElementType& extra) {
  nsTArray<ElementType> ary;
  ary.AppendElements(data, dataLen);
  if (ary.Length() != dataLen) {
    return PR_FALSE;
  }
  if (!(ary == ary)) {
    return PR_FALSE;
  }
  PRUint32 i;
  for (i = 0; i < ary.Length(); ++i) {
    if (ary[i] != data[i])
      return PR_FALSE;
  }
  for (i = 0; i < ary.Length(); ++i) {
    if (ary.SafeElementAt(i, extra) != data[i])
      return PR_FALSE;
  }
  if (ary.SafeElementAt(ary.Length(), extra) != extra ||
      ary.SafeElementAt(ary.Length() * 10, extra) != extra)
    return PR_FALSE;
  // ensure sort results in ascending order
  ary.Sort();
  PRUint32 j = 0, k;
  if (ary.GreatestIndexLtEq(extra, k))
    return PR_FALSE;
  for (i = 0; i < ary.Length(); ++i) {
    if (!ary.GreatestIndexLtEq(ary[i], k))
      return PR_FALSE;
    if (k < j)
      return PR_FALSE;
    j = k;
  }
  for (i = ary.Length(); --i; ) {
    if (ary[i] < ary[i - 1])
      return PR_FALSE;
    if (ary[i] == ary[i - 1])
      ary.RemoveElementAt(i);
  }
  if (!(ary == ary)) {
    return PR_FALSE;
  }
  for (i = 0; i < ary.Length(); ++i) {
    if (ary.BinaryIndexOf(ary[i]) != i)
      return PR_FALSE;
  }
  if (ary.BinaryIndexOf(extra) != ary.NoIndex)
    return PR_FALSE;
  PRUint32 oldLen = ary.Length();
  ary.RemoveElement(data[dataLen / 2]);
  if (ary.Length() != (oldLen - 1))
    return PR_FALSE;
  if (!(ary == ary))
    return PR_FALSE;

  PRUint32 index = ary.Length() / 2;
  if (!ary.InsertElementAt(index, extra))
    return PR_FALSE;
  if (!(ary == ary))
    return PR_FALSE;
  if (ary[index] != extra)
    return PR_FALSE;
  if (ary.IndexOf(extra) == PR_UINT32_MAX)
    return PR_FALSE;
  if (ary.LastIndexOf(extra) == PR_UINT32_MAX)
    return PR_FALSE;
  // ensure proper searching
  if (ary.IndexOf(extra) > ary.LastIndexOf(extra))
    return PR_FALSE;
  if (ary.IndexOf(extra, index) != ary.LastIndexOf(extra, index))
    return PR_FALSE;

  nsTArray<ElementType> copy(ary);
  if (!(ary == copy))
    return PR_FALSE;
  for (i = 0; i < copy.Length(); ++i) {
    if (ary[i] != copy[i])
      return PR_FALSE;
  }
  if (!ary.AppendElements(copy))
    return PR_FALSE;
  PRUint32 cap = ary.Capacity();
  ary.RemoveElementsAt(copy.Length(), copy.Length());
  ary.Compact();
  if (ary.Capacity() == cap)
    return PR_FALSE;

  ary.Clear();
  if (!ary.IsEmpty() || ary.Elements() == nsnull)
    return PR_FALSE;
  if (!(ary == nsTArray<ElementType>()))
    return PR_FALSE;
  if (ary == copy)
    return PR_FALSE;
  if (ary.SafeElementAt(0, extra) != extra ||
      ary.SafeElementAt(10, extra) != extra)
    return PR_FALSE;

  ary = copy;
  if (!(ary == copy))
    return PR_FALSE;
  for (i = 0; i < copy.Length(); ++i) {
    if (ary[i] != copy[i])
      return PR_FALSE;
  }

  if (!ary.InsertElementsAt(0, copy))
    return PR_FALSE;
  if (ary == copy)
    return PR_FALSE;
  ary.RemoveElementsAt(0, copy.Length());
  for (i = 0; i < copy.Length(); ++i) {
    if (ary[i] != copy[i])
      return PR_FALSE;
  }

  // These shouldn't crash!
  nsTArray<ElementType> empty;
  ary.AppendElements(reinterpret_cast<ElementType *>(0), 0);
  ary.AppendElements(empty);

  // See bug 324981
  ary.RemoveElement(extra);
  ary.RemoveElement(extra);

  return PR_TRUE;
}

static PRBool test_int_array() {
  int data[] = {4,6,8,2,4,1,5,7,3};
  return test_basic_array(data, NS_ARRAY_LENGTH(data), int(14));
}

static PRBool test_int64_array() {
  PRInt64 data[] = {4,6,8,2,4,1,5,7,3};
  return test_basic_array(data, NS_ARRAY_LENGTH(data), PRInt64(14));
}

static PRBool test_char_array() {
  char data[] = {4,6,8,2,4,1,5,7,3};
  return test_basic_array(data, NS_ARRAY_LENGTH(data), char(14));
}

static PRBool test_uint32_array() {
  PRUint32 data[] = {4,6,8,2,4,1,5,7,3};
  return test_basic_array(data, NS_ARRAY_LENGTH(data), PRUint32(14));
}

//----

class Object {
  public:
    Object() : mNum(0) {
    }
    Object(const char *str, PRUint32 num) : mStr(str), mNum(num) {
    }
    Object(const Object& other) : mStr(other.mStr), mNum(other.mNum) {
    }
    ~Object() {}

    Object& operator=(const Object& other) {
      mStr = other.mStr;
      mNum = other.mNum;
      return *this;
    }

    PRBool operator==(const Object& other) const {
      return mStr == other.mStr && mNum == other.mNum;
    }

    PRBool operator<(const Object& other) const {
      // sort based on mStr only
      return Compare(mStr, other.mStr) < 0;
    }

    const char *Str() const { return mStr.get(); }
    PRUint32 Num() const { return mNum; }

  private:
    nsCString mStr;
    PRUint32  mNum;
};

static PRBool test_object_array() {
  nsTArray<Object> objArray;
  const char kdata[] = "hello world";
  PRUint32 i;
  for (i = 0; i < NS_ARRAY_LENGTH(kdata); ++i) {
    char x[] = {kdata[i],'\0'};
    if (!objArray.AppendElement(Object(x, i)))
      return PR_FALSE;
  }
  for (i = 0; i < NS_ARRAY_LENGTH(kdata); ++i) {
    if (objArray[i].Str()[0] != kdata[i])
      return PR_FALSE;
    if (objArray[i].Num() != i)
      return PR_FALSE;
  }
  objArray.Sort();
  const char ksorted[] = "\0 dehllloorw";
  for (i = 0; i < NS_ARRAY_LENGTH(kdata)-1; ++i) {
    if (objArray[i].Str()[0] != ksorted[i])
      return PR_FALSE;
  }
  return PR_TRUE;
}

// nsTArray<nsAutoPtr<T>> is not supported
#if 0
static PRBool test_autoptr_array() {
  nsTArray< nsAutoPtr<Object> > objArray;
  const char kdata[] = "hello world";
  for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(kdata); ++i) {
    char x[] = {kdata[i],'\0'};
    nsAutoPtr<Object> obj(new Object(x,i));
    if (!objArray.AppendElement(obj))  // XXX does not call copy-constructor for nsAutoPtr!!!
      return PR_FALSE;
    if (obj.get() == nsnull)
      return PR_FALSE;
    obj.forget();  // the array now owns the reference
  }
  for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(kdata); ++i) {
    if (objArray[i]->Str()[0] != kdata[i])
      return PR_FALSE;
    if (objArray[i]->Num() != i)
      return PR_FALSE;
  }
  return PR_TRUE;
}
#endif

//----

static PRBool operator==(const nsCString &a, const char *b) {
  return a.Equals(b);
}

static PRBool test_string_array() {
  nsTArray<nsCString> strArray;
  const char kdata[] = "hello world";
  PRUint32 i;
  for (i = 0; i < NS_ARRAY_LENGTH(kdata); ++i) {
    if (!strArray.AppendElement(nsCString(kdata[i])))
      return PR_FALSE;
  }
  for (i = 0; i < NS_ARRAY_LENGTH(kdata); ++i) {
    if (strArray[i].CharAt(0) != kdata[i])
      return PR_FALSE;
  }

  const char kextra[] = "foo bar";
  PRUint32 oldLen = strArray.Length();
  if (!strArray.AppendElement(kextra))
    return PR_FALSE;
  strArray.RemoveElement(kextra);
  if (oldLen != strArray.Length())
    return PR_FALSE;

  if (strArray.IndexOf("e") != 1)
    return PR_FALSE;

  strArray.Sort();
  const char ksorted[] = "\0 dehllloorw";
  for (i = NS_ARRAY_LENGTH(kdata); i--; ) {
    if (strArray[i].CharAt(0) != ksorted[i])
      return PR_FALSE;
    if (i > 0 && strArray[i] == strArray[i - 1])
      strArray.RemoveElementAt(i);
  }
  for (i = 0; i < strArray.Length(); ++i) {
    if (strArray.BinaryIndexOf(strArray[i]) != i)
      return PR_FALSE;
  }
  if (strArray.BinaryIndexOf(EmptyCString()) != strArray.NoIndex)
    return PR_FALSE;

  nsCString rawArray[NS_ARRAY_LENGTH(kdata)-1];
  for (i = 0; i < NS_ARRAY_LENGTH(rawArray); ++i)
    rawArray[i].Assign(kdata + i);  // substrings of kdata
  return test_basic_array(rawArray, NS_ARRAY_LENGTH(rawArray),
                          nsCString("foopy"));
}

//----

typedef nsCOMPtr<nsIFile> FilePointer;

class nsFileNameComparator {
  public:
    PRBool Equals(const FilePointer &a, const char *b) const {
      nsCAutoString name;
      a->GetNativeLeafName(name);
      return name.Equals(b);
    }
};

static PRBool test_comptr_array() {
  FilePointer tmpDir;
  NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tmpDir));
  if (!tmpDir)
    return PR_FALSE;
  const char *kNames[] = {
    "foo.txt", "bar.html", "baz.gif"
  };
  nsTArray<FilePointer> fileArray;
  PRUint32 i;
  for (i = 0; i < NS_ARRAY_LENGTH(kNames); ++i) {
    FilePointer f;
    tmpDir->Clone(getter_AddRefs(f));
    if (!f)
      return PR_FALSE;
    if (NS_FAILED(f->AppendNative(nsDependentCString(kNames[i]))))
      return PR_FALSE;
    fileArray.AppendElement(f);
  }

  if (fileArray.IndexOf(kNames[1], 0, nsFileNameComparator()) != 1)
    return PR_FALSE;

  // It's unclear what 'operator<' means for nsCOMPtr, but whatever...
  return test_basic_array(fileArray.Elements(), fileArray.Length(), 
                          tmpDir);
}

//----

class RefcountedObject {
  public:
    RefcountedObject() : rc(0) {}
    void AddRef() {
      ++rc;
    }
    void Release() {
      if (--rc == 0)
        delete this;
    }
    ~RefcountedObject() {}
  private:
    PRInt32 rc;
};

static PRBool test_refptr_array() {
  PRBool rv = PR_TRUE;

  nsTArray< nsRefPtr<RefcountedObject> > objArray;

  RefcountedObject *a = new RefcountedObject(); a->AddRef();
  RefcountedObject *b = new RefcountedObject(); b->AddRef();
  RefcountedObject *c = new RefcountedObject(); c->AddRef();

  objArray.AppendElement(a);
  objArray.AppendElement(b);
  objArray.AppendElement(c);

  if (objArray.IndexOf(b) != 1)
    rv = PR_FALSE;

  a->Release();
  b->Release();
  c->Release();
  return rv;
}

//----

static PRBool test_ptrarray() {
  nsTPtrArray<PRUint32> ary;
  if (ary.SafeElementAt(0) != nsnull)
    return PR_FALSE;
  if (ary.SafeElementAt(1000) != nsnull)
    return PR_FALSE;
  PRUint32 a = 10;
  ary.AppendElement(&a);
  if (*ary[0] != a)
    return PR_FALSE;
  if (*ary.SafeElementAt(0) != a)
    return PR_FALSE;

  nsTPtrArray<const PRUint32> cary;
  if (cary.SafeElementAt(0) != nsnull)
    return PR_FALSE;
  if (cary.SafeElementAt(1000) != nsnull)
    return PR_FALSE;
  const PRUint32 b = 14;
  cary.AppendElement(&a);
  cary.AppendElement(&b);
  if (*cary[0] != a || *cary[1] != b)
    return PR_FALSE;
  if (*cary.SafeElementAt(0) != a || *cary.SafeElementAt(1) != b)
    return PR_FALSE;

  return PR_TRUE;
}

//----

// This test relies too heavily on the existence of DebugGetHeader to be
// useful in non-debug builds.
#ifdef DEBUG
static PRBool test_autoarray() {
  PRUint32 data[] = {4,6,8,2,4,1,5,7,3};
  nsAutoTArray<PRUint32, NS_ARRAY_LENGTH(data)> array;

  void* hdr = array.DebugGetHeader();
  if (hdr == nsTArray<PRUint32>().DebugGetHeader())
    return PR_FALSE;
  if (hdr == nsAutoTArray<PRUint32, NS_ARRAY_LENGTH(data)>().DebugGetHeader())
    return PR_FALSE;

  array.AppendElement(1u);
  if (hdr != array.DebugGetHeader())
    return PR_FALSE;

  array.RemoveElement(1u);
  array.AppendElements(data, NS_ARRAY_LENGTH(data));
  if (hdr != array.DebugGetHeader())
    return PR_FALSE;

  array.AppendElement(2u);
  if (hdr == array.DebugGetHeader())
    return PR_FALSE;

  array.Clear();
  array.Compact();
  if (hdr != array.DebugGetHeader())
    return PR_FALSE;
  array.AppendElements(data, NS_ARRAY_LENGTH(data));
  if (hdr != array.DebugGetHeader())
    return PR_FALSE;

  nsTArray<PRUint32> array2;
  void* emptyHdr = array2.DebugGetHeader();
  array.SwapElements(array2);
  if (emptyHdr == array.DebugGetHeader())
    return PR_FALSE;
  if (hdr == array2.DebugGetHeader())
    return PR_FALSE;
  PRUint32 i;
  for (i = 0; i < NS_ARRAY_LENGTH(data); ++i) {
    if (array2[i] != data[i])
      return PR_FALSE;
  }
  if (!array.IsEmpty())
    return PR_FALSE;

  array.Compact();
  array.AppendElements(data, NS_ARRAY_LENGTH(data));
  PRUint32 data3[] = {5, 7, 11};
  nsAutoTArray<PRUint32, NS_ARRAY_LENGTH(data3)> array3;
  array3.AppendElements(data3, NS_ARRAY_LENGTH(data3));  
  array.SwapElements(array3);
  for (i = 0; i < NS_ARRAY_LENGTH(data); ++i) {
    if (array3[i] != data[i])
      return PR_FALSE;
  }
  for (i = 0; i < NS_ARRAY_LENGTH(data3); ++i) {
    if (array[i] != data3[i])
      return PR_FALSE;
  }

  return PR_TRUE;
}
#endif

//----

// IndexOf used to potentially scan beyond the end of the array.  Test for
// this incorrect behavior by adding a value (5), removing it, then seeing
// if IndexOf finds it.
static PRBool test_indexof() {
  nsTArray<int> array;
  array.AppendElement(0);
  // add and remove the 5
  array.AppendElement(5);
  array.RemoveElementAt(1);
  // we should not find the 5!
  return array.IndexOf(5, 1) == array.NoIndex;
}

//----

template <class Array>
static PRBool is_heap(const Array& ary, PRUint32 len) {
  PRUint32 index = 1;
  while (index < len) {
    if (ary[index] > ary[(index - 1) >> 1])
      return PR_FALSE;
    index++;
  }
  return PR_TRUE;
} 

static PRBool test_heap() {
  const int data[] = {4,6,8,2,4,1,5,7,3};
  nsTArray<int> ary;
  ary.AppendElements(data, NS_ARRAY_LENGTH(data));
  // make a heap and make sure it's a heap
  ary.MakeHeap();
  if (!is_heap(ary, NS_ARRAY_LENGTH(data)))
    return PR_FALSE;
  // pop the root and make sure it's still a heap
  int root = ary[0];
  ary.PopHeap();
  if (!is_heap(ary, NS_ARRAY_LENGTH(data) - 1))
    return PR_FALSE;
  // push the previously poped value back on and make sure it's still a heap
  ary.PushHeap(root);
  if (!is_heap(ary, NS_ARRAY_LENGTH(data)))
    return PR_FALSE;
  // make sure the heap looks like what we expect
  const int expected_data[] = {8,7,5,6,4,1,4,2,3};
  PRUint32 index;
  for (index = 0; index < NS_ARRAY_LENGTH(data); index++)
    if (ary[index] != expected_data[index])
      return PR_FALSE;
  return PR_TRUE;
}

//----

typedef PRBool (*TestFunc)();
#define DECL_TEST(name) { #name, name }

static const struct Test {
  const char* name;
  TestFunc    func;
} tests[] = {
  DECL_TEST(test_int_array),
  DECL_TEST(test_int64_array),
  DECL_TEST(test_char_array),
  DECL_TEST(test_uint32_array),
  DECL_TEST(test_object_array),
  DECL_TEST(test_string_array),
  DECL_TEST(test_comptr_array),
  DECL_TEST(test_refptr_array),
  DECL_TEST(test_ptrarray),
#ifdef DEBUG
  DECL_TEST(test_autoarray),
#endif
  DECL_TEST(test_indexof),
  DECL_TEST(test_heap),
  { nsnull, nsnull }
};

}

using namespace TestTArray;

int main(int argc, char **argv) {
  int count = 1;
  if (argc > 1)
    count = atoi(argv[1]);

  if (NS_FAILED(NS_InitXPCOM2(nsnull, nsnull, nsnull)))
    return -1;

  while (count--) {
    for (const Test* t = tests; t->name != nsnull; ++t) {
      printf("%25s : %s\n", t->name, t->func() ? "SUCCESS" : "FAILURE");
    }
  }
  
  NS_ShutdownXPCOM(nsnull);
  return 0;
}