modeltest.cpp 19.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
/****************************************************************************
**
** Copyright (C) 2007 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Concurrent project on Trolltech Labs.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "modeltest.h"

Q_DECLARE_METATYPE(QModelIndex)

/*!
    Connect to all of the models signals.  Whenever anything happens recheck everything.
*/
31
ModelTest::ModelTest(QAbstractItemModel *_model, QObject* parent) : QObject(parent), model(_model), fetchingMore(false)
32 33 34
{
    Q_ASSERT(model);

35
    connect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
36
            this, SLOT(runAllTests()));
37
    connect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
38
            this, SLOT(runAllTests()));
39
    connect(model, SIGNAL(columnsInserted(QModelIndex,int,int)),
40
            this, SLOT(runAllTests()));
41
    connect(model, SIGNAL(columnsRemoved(QModelIndex,int,int)),
42
            this, SLOT(runAllTests()));
43
    connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
44
            this, SLOT(runAllTests()));
45
    connect(model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),
46
            this, SLOT(runAllTests()));
47 48 49 50
    connect(model, SIGNAL(layoutAboutToBeChanged()), this, SLOT(runAllTests()));
    connect(model, SIGNAL(layoutChanged()), this, SLOT(runAllTests()));
    connect(model, SIGNAL(modelReset()), this, SLOT(runAllTests()));
    connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
51
            this, SLOT(runAllTests()));
52
    connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
53
            this, SLOT(runAllTests()));
54
    connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),
55
            this, SLOT(runAllTests()));
56
    connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
57 58 59 60 61 62 63 64
            this, SLOT(runAllTests()));

    // Special checks for inserting/removing
    connect(model, SIGNAL(layoutAboutToBeChanged()),
            this, SLOT(layoutAboutToBeChanged()));
    connect(model, SIGNAL(layoutChanged()),
            this, SLOT(layoutChanged()));

65 66 67 68 69 70 71 72
    connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
            this, SLOT(rowsAboutToBeInserted(QModelIndex,int,int)));
    connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
            this, SLOT(rowsAboutToBeRemoved(QModelIndex,int,int)));
    connect(model, SIGNAL(rowsInserted(QModelIndex,int,int)),
            this, SLOT(rowsInserted(QModelIndex,int,int)));
    connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
            this, SLOT(rowsRemoved(QModelIndex,int,int)));
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215

    runAllTests();
}

void ModelTest::runAllTests()
{
    if (fetchingMore)
        return;
    nonDestructiveBasicTest();
    rowCount();
    columnCount();
    hasIndex();
    index();
    parent();
    data();
}

/*!
    nonDestructiveBasicTest tries to call a number of the basic functions (not all)
    to make sure the model doesn't outright segfault, testing the functions that makes sense.
*/
void ModelTest::nonDestructiveBasicTest()
{
    Q_ASSERT(model->buddy(QModelIndex()) == QModelIndex());
    model->canFetchMore(QModelIndex());
    Q_ASSERT(model->columnCount(QModelIndex()) >= 0);
    Q_ASSERT(model->data(QModelIndex()) == QVariant());
    fetchingMore = true;
    model->fetchMore(QModelIndex());
    fetchingMore = false;
    Qt::ItemFlags flags = model->flags(QModelIndex());
    Q_ASSERT(flags == Qt::ItemIsDropEnabled || flags == 0);
    model->hasChildren(QModelIndex());
    model->hasIndex(0, 0);
    model->headerData(0, Qt::Horizontal);
    model->index(0, 0);
    Q_ASSERT(model->index(-1, -1) == QModelIndex());
    model->itemData(QModelIndex());
    QVariant cache;
    model->match(QModelIndex(), -1, cache);
    model->mimeTypes();
    Q_ASSERT(model->parent(QModelIndex()) == QModelIndex());
    Q_ASSERT(model->rowCount() >= 0);
    QVariant variant;
    model->setData(QModelIndex(), variant, -1);
    model->setHeaderData(-1, Qt::Horizontal, QVariant());
    model->setHeaderData(0, Qt::Horizontal, QVariant());
    model->setHeaderData(999999, Qt::Horizontal, QVariant());
    QMap<int, QVariant> roles;
    model->sibling(0, 0, QModelIndex());
    model->span(QModelIndex());
    model->supportedDropActions();
}

/*!
    Tests model's implementation of QAbstractItemModel::rowCount() and hasChildren()

    Models that are dynamically populated are not as fully tested here.
 */
void ModelTest::rowCount()
{
    // check top row
    QModelIndex topIndex = model->index(0, 0, QModelIndex());
    int rows = model->rowCount(topIndex);
    Q_ASSERT(rows >= 0);
    if (rows > 0)
        Q_ASSERT(model->hasChildren(topIndex) == true);

    QModelIndex secondLevelIndex = model->index(0, 0, topIndex);
    if (secondLevelIndex.isValid()) { // not the top level
        // check a row count where parent is valid
        rows = model->rowCount(secondLevelIndex);
        Q_ASSERT(rows >= 0);
        if (rows > 0)
            Q_ASSERT(model->hasChildren(secondLevelIndex) == true);
    }

    // The models rowCount() is tested more extensively in checkChildren(),
    // but this catches the big mistakes
}

/*!
    Tests model's implementation of QAbstractItemModel::columnCount() and hasChildren()
 */
void ModelTest::columnCount()
{
    // check top row
    QModelIndex topIndex = model->index(0, 0, QModelIndex());
    Q_ASSERT(model->columnCount(topIndex) >= 0);

    // check a column count where parent is valid
    QModelIndex childIndex = model->index(0, 0, topIndex);
    if (childIndex.isValid())
        Q_ASSERT(model->columnCount(childIndex) >= 0);

    // columnCount() is tested more extensively in checkChildren(),
    // but this catches the big mistakes
}

/*!
    Tests model's implementation of QAbstractItemModel::hasIndex()
 */
void ModelTest::hasIndex()
{
    // Make sure that invalid values returns an invalid index
    Q_ASSERT(model->hasIndex(-2, -2) == false);
    Q_ASSERT(model->hasIndex(-2, 0) == false);
    Q_ASSERT(model->hasIndex(0, -2) == false);

    int rows = model->rowCount();
    int columns = model->columnCount();

    // check out of bounds
    Q_ASSERT(model->hasIndex(rows, columns) == false);
    Q_ASSERT(model->hasIndex(rows + 1, columns + 1) == false);

    if (rows > 0)
        Q_ASSERT(model->hasIndex(0, 0) == true);

    // hasIndex() is tested more extensively in checkChildren(),
    // but this catches the big mistakes
}

/*!
    Tests model's implementation of QAbstractItemModel::index()
 */
void ModelTest::index()
{
    // Make sure that invalid values returns an invalid index
    Q_ASSERT(model->index(-2, -2) == QModelIndex());
    Q_ASSERT(model->index(-2, 0) == QModelIndex());
    Q_ASSERT(model->index(0, -2) == QModelIndex());

    int rows = model->rowCount();
    int columns = model->columnCount();

    if (rows == 0)
        return;

    // Catch off by one errors
    Q_ASSERT(model->index(rows, columns) == QModelIndex());
    Q_ASSERT(model->index(0, 0).isValid() == true);

216
    // Make sure that the same index is* always* returned
217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
    QModelIndex a = model->index(0, 0);
    QModelIndex b = model->index(0, 0);
    Q_ASSERT(a == b);

    // index() is tested more extensively in checkChildren(),
    // but this catches the big mistakes
}

/*!
    Tests model's implementation of QAbstractItemModel::parent()
 */
void ModelTest::parent()
{
    // Make sure the model wont crash and will return an invalid QModelIndex
    // when asked for the parent of an invalid index.
    Q_ASSERT(model->parent(QModelIndex()) == QModelIndex());

    if (model->rowCount() == 0)
        return;

    // Column 0                | Column 1    |
    // QModelIndex()           |             |
    //    \- topIndex          | topIndex1   |
    //         \- childIndex   | childIndex1 |

    // Common error test #1, make sure that a top level index has a parent
    // that is a invalid QModelIndex.
    QModelIndex topIndex = model->index(0, 0, QModelIndex());
    Q_ASSERT(model->parent(topIndex) == QModelIndex());

    // Common error test #2, make sure that a second level index has a parent
    // that is the first level index.
    if (model->rowCount(topIndex) > 0) {
        QModelIndex childIndex = model->index(0, 0, topIndex);
        Q_ASSERT(model->parent(childIndex) == topIndex);
    }

    // Common error test #3, the second column should NOT have the same children
    // as the first column in a row.
    // Usually the second column shouldn't have children.
    QModelIndex topIndex1 = model->index(0, 1, QModelIndex());
    if (model->rowCount(topIndex1) > 0) {
        QModelIndex childIndex = model->index(0, 0, topIndex);
        QModelIndex childIndex1 = model->index(0, 0, topIndex1);
        Q_ASSERT(childIndex != childIndex1);
    }

    // Full test, walk n levels deep through the model making sure that all
    // parent's children correctly specify their parent.
    checkChildren(QModelIndex());
}

/*!
    Called from the parent() test.

    A model that returns an index of parent X should also return X when asking
    for the parent of the index.

    This recursive function does pretty extensive testing on the whole model in an
    effort to catch edge cases.

    This function assumes that rowCount(), columnCount() and index() already work.
    If they have a bug it will point it out, but the above tests should have already
    found the basic bugs because it is easier to figure out the problem in
    those tests then this one.
 */
void ModelTest::checkChildren(const QModelIndex &parent, int currentDepth)
{
    // First just try walking back up the tree.
    QModelIndex p = parent;
    while (p.isValid())
        p = p.parent();

    // For models that are dynamically populated
    if (model->canFetchMore(parent)) {
        fetchingMore = true;
        model->fetchMore(parent);
        fetchingMore = false;
    }

    int rows = model->rowCount(parent);
    int columns = model->columnCount(parent);

    if (rows > 0)
        Q_ASSERT(model->hasChildren(parent));

    // Some further testing against rows(), columns(), and hasChildren()
    Q_ASSERT(rows >= 0);
    Q_ASSERT(columns >= 0);
    if (rows > 0)
        Q_ASSERT(model->hasChildren(parent) == true);

    //qDebug() << "parent:" << model->data(parent).toString() << "rows:" << rows
    //         << "columns:" << columns << "parent column:" << parent.column();

    Q_ASSERT(model->hasIndex(rows + 1, 0, parent) == false);
    for (int r = 0; r < rows; ++r) {
        if (model->canFetchMore(parent)) {
            fetchingMore = true;
            model->fetchMore(parent);
            fetchingMore = false;
        }
        Q_ASSERT(model->hasIndex(r, columns + 1, parent) == false);
        for (int c = 0; c < columns; ++c) {
            Q_ASSERT(model->hasIndex(r, c, parent) == true);
            QModelIndex index = model->index(r, c, parent);
            // rowCount() and columnCount() said that it existed...
            Q_ASSERT(index.isValid() == true);

            // index() should always return the same index when called twice in a row
            QModelIndex modifiedIndex = model->index(r, c, parent);
            Q_ASSERT(index == modifiedIndex);

            // Make sure we get the same index if we request it twice in a row
            QModelIndex a = model->index(r, c, parent);
            QModelIndex b = model->index(r, c, parent);
            Q_ASSERT(a == b);

            // Some basic checking on the index that is returned
            Q_ASSERT(index.model() == model);
            Q_ASSERT(index.row() == r);
            Q_ASSERT(index.column() == c);
            // While you can technically return a QVariant usually this is a sign
            // of an bug in data()  Disable if this really is ok in your model.
            //Q_ASSERT(model->data(index, Qt::DisplayRole).isValid() == true);

            // If the next test fails here is some somewhat useful debug you play with.
            /*
            if (model->parent(index) != parent) {
                qDebug() << r << c << currentDepth << model->data(index).toString()
                         << model->data(parent).toString();
                qDebug() << index << parent << model->parent(index);
                // And a view that you can even use to show the model.
                //QTreeView view;
                //view.setModel(model);
                //view.show();
            }*/

            // Check that we can get back our real parent.
            QModelIndex p = model->parent(index);
            //qDebug() << "child:" << index;
            //qDebug() << p;
            //qDebug() << parent;
360
            Q_ASSERT(p == parent);
361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394

            // recursively go down the children
            if (model->hasChildren(index) && currentDepth < 10 ) {
                //qDebug() << r << c << "has children" << model->rowCount(index);
                checkChildren(index, ++currentDepth);
            }/* else { if (currentDepth >= 10) qDebug() << "checked 10 deep"; };*/

            // make sure that after testing the children that the index doesn't change.
            QModelIndex newerIndex = model->index(r, c, parent);
            Q_ASSERT(index == newerIndex);
        }
    }
}

/*!
    Tests model's implementation of QAbstractItemModel::data()
 */
void ModelTest::data()
{
    // Invalid index should return an invalid qvariant
    Q_ASSERT(!model->data(QModelIndex()).isValid());

    if (model->rowCount() == 0)
        return;

    // A valid index should have a valid QVariant data
    Q_ASSERT(model->index(0, 0).isValid());

    // shouldn't be able to set data on an invalid index
    Q_ASSERT(model->setData(QModelIndex(), QLatin1String("foo"), Qt::DisplayRole) == false);

    // General Purpose roles that should return a QString
    QVariant variant = model->data(model->index(0, 0), Qt::ToolTipRole);
    if (variant.isValid()) {
395
        Q_ASSERT(variant.canConvert<QString>());
396 397 398
    }
    variant = model->data(model->index(0, 0), Qt::StatusTipRole);
    if (variant.isValid()) {
399
        Q_ASSERT(variant.canConvert<QString>());
400 401 402
    }
    variant = model->data(model->index(0, 0), Qt::WhatsThisRole);
    if (variant.isValid()) {
403
        Q_ASSERT(variant.canConvert<QString>());
404 405 406 407 408
    }

    // General Purpose roles that should return a QSize
    variant = model->data(model->index(0, 0), Qt::SizeHintRole);
    if (variant.isValid()) {
409
        Q_ASSERT(variant.canConvert<QSize>());
410 411 412 413 414
    }

    // General Purpose roles that should return a QFont
    QVariant fontVariant = model->data(model->index(0, 0), Qt::FontRole);
    if (fontVariant.isValid()) {
415
        Q_ASSERT(fontVariant.canConvert<QFont>());
416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437
    }

    // Check that the alignment is one we know about
    QVariant textAlignmentVariant = model->data(model->index(0, 0), Qt::TextAlignmentRole);
    if (textAlignmentVariant.isValid()) {
        int alignment = textAlignmentVariant.toInt();
        Q_ASSERT(alignment == Qt::AlignLeft ||
                 alignment == Qt::AlignRight ||
                 alignment == Qt::AlignHCenter ||
                 alignment == Qt::AlignJustify ||
                 alignment == Qt::AlignTop ||
                 alignment == Qt::AlignBottom ||
                 alignment == Qt::AlignVCenter ||
                 alignment == Qt::AlignCenter ||
                 alignment == Qt::AlignAbsolute ||
                 alignment == Qt::AlignLeading ||
                 alignment == Qt::AlignTrailing);
    }

    // General Purpose roles that should return a QColor
    QVariant colorVariant = model->data(model->index(0, 0), Qt::BackgroundColorRole);
    if (colorVariant.isValid()) {
438
        Q_ASSERT(colorVariant.canConvert<QColor>());
439 440 441 442
    }

    colorVariant = model->data(model->index(0, 0), Qt::TextColorRole);
    if (colorVariant.isValid()) {
443
        Q_ASSERT(colorVariant.canConvert<QColor>());
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537
    }

    // Check that the "check state" is one we know about.
    QVariant checkStateVariant = model->data(model->index(0, 0), Qt::CheckStateRole);
    if (checkStateVariant.isValid()) {
        int state = checkStateVariant.toInt();
        Q_ASSERT(state == Qt::Unchecked ||
                 state == Qt::PartiallyChecked ||
                 state == Qt::Checked);
    }
}

/*!
    Store what is about to be inserted to make sure it actually happens

    \sa rowsInserted()
 */
void ModelTest::rowsAboutToBeInserted(const QModelIndex &parent, int start, int end)
{
    Q_UNUSED(end);
    Changing c;
    c.parent = parent;
    c.oldSize = model->rowCount(parent);
    c.last = model->data(model->index(start - 1, 0, parent));
    c.next = model->data(model->index(start, 0, parent));
    insert.push(c);
}

/*!
    Confirm that what was said was going to happen actually did

    \sa rowsAboutToBeInserted()
 */
void ModelTest::rowsInserted(const QModelIndex & parent, int start, int end)
{
    Changing c = insert.pop();
    Q_ASSERT(c.parent == parent);
    Q_ASSERT(c.oldSize + (end - start + 1) == model->rowCount(parent));
    Q_ASSERT(c.last == model->data(model->index(start - 1, 0, c.parent)));
    /*
    if (c.next != model->data(model->index(end + 1, 0, c.parent))) {
        qDebug() << start << end;
        for (int i=0; i < model->rowCount(); ++i)
            qDebug() << model->index(i, 0).data().toString();
        qDebug() << c.next << model->data(model->index(end + 1, 0, c.parent));
    }
    */
    Q_ASSERT(c.next == model->data(model->index(end + 1, 0, c.parent)));
}

void ModelTest::layoutAboutToBeChanged()
{
    for (int i = 0; i < qBound(0, model->rowCount(), 100); ++i)
        changing.append(QPersistentModelIndex(model->index(i, 0)));
}

void ModelTest::layoutChanged()
{
    for (int i = 0; i < changing.count(); ++i) {
        QPersistentModelIndex p = changing[i];
        Q_ASSERT(p == model->index(p.row(), p.column(), p.parent()));
    }
    changing.clear();
}

/*!
    Store what is about to be inserted to make sure it actually happens

    \sa rowsRemoved()
 */
void ModelTest::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
{
    Changing c;
    c.parent = parent;
    c.oldSize = model->rowCount(parent);
    c.last = model->data(model->index(start - 1, 0, parent));
    c.next = model->data(model->index(end + 1, 0, parent));
    remove.push(c);
}

/*!
    Confirm that what was said was going to happen actually did

    \sa rowsAboutToBeRemoved()
 */
void ModelTest::rowsRemoved(const QModelIndex & parent, int start, int end)
{
    Changing c = remove.pop();
    Q_ASSERT(c.parent == parent);
    Q_ASSERT(c.oldSize - (end - start + 1) == model->rowCount(parent));
    Q_ASSERT(c.last == model->data(model->index(start - 1, 0, c.parent)));
    Q_ASSERT(c.next == model->data(model->index(start, 0, c.parent)));
}