// Copyright 2011 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

goog.provide('goog.editor.TableTest');
goog.setTestOnly('goog.editor.TableTest');

goog.require('goog.dom');
goog.require('goog.editor.Table');
goog.require('goog.testing.jsunit');
goog.require('goog.userAgent');

function setUp() {
  var inputTables = document.getElementsByTagName('table');
  testElements = {};
  testObjects = {};
  for (var i = 0; i < inputTables.length; i++) {
    var originalTable = inputTables[i];
    if (originalTable.id.substring(0, 5) == 'test-') {
      var tableName = originalTable.id.substring(5);
      var testTable = originalTable.cloneNode(true);
      testTable.id = tableName;
      testElements[tableName] = testTable;
      document.body.appendChild(testTable);
      testObjects[tableName] = new goog.editor.Table(testTable);
    }
  }
}

function tearDown() {
  for (var tableName in testElements) {
    document.body.removeChild(testElements[tableName]);
    delete testElements[tableName];
    delete testObjects[tableName];
  }
  testElements = null;
  testObjects = null;
}

// These tests don't pass on Safari, because the table editor only works
// on IE and FF right now.
// TODO(nicksantos): Fix this.
if (!goog.userAgent.WEBKIT) {

  function tableSanityCheck(editableTable, rowCount, colCount) {
    assertEquals('Table has expected number of rows',
        rowCount, editableTable.rows.length);
    for (var i = 0, row; row = editableTable.rows[i]; i++) {
      assertEquals('Row ' + i + ' has expected number of columns',
          colCount, row.columns.length);
    }
  }

  function testBasicTable() {
    // Do some basic sanity checking on the editable table structure
    tableSanityCheck(testObjects.basic, 4, 3);
    var originalRows = testElements.basic.getElementsByTagName('tr');
    assertEquals('Basic table row count, compared to source',
        originalRows.length, testObjects.basic.rows.length);
    assertEquals('Basic table row count, known value',
        4, testObjects.basic.rows.length);
    assertEquals('Basic table first row element',
        originalRows[0], testObjects.basic.rows[0].element);
    assertEquals('Basic table last row element',
        originalRows[3], testObjects.basic.rows[3].element);
    assertEquals('Basic table first row length',
        3, testObjects.basic.rows[0].columns.length);
    assertEquals('Basic table last row length',
        3, testObjects.basic.rows[3].columns.length);
  }

  function testTortureTable() {
    // Do basic sanity checking on torture table structure
    tableSanityCheck(testObjects.torture, 9, 3);
    var originalRows = testElements.torture.getElementsByTagName('tr');
    assertEquals('Torture table row count, compared to source',
        originalRows.length, testObjects.torture.rows.length);
    assertEquals('Torture table row count, known value',
        9, testObjects.torture.rows.length);
  }

  function _testInsertRowResult(element, editableTable,  newTr, index) {
    if (element == testElements.basic) {
      originalRowCount = 4;
    } else if (element == testElements.torture) {
      originalRowCount = 9;
    }

    assertEquals('Row was added to table',
        originalRowCount + 1, element.getElementsByTagName('tr').length);
    assertEquals('Row was added at position ' + index,
        element.getElementsByTagName('tr')[index], newTr);
    assertEquals('Row knows its own position',
        index, editableTable.rows[index].index);
    assertEquals('EditableTable shows row at position ' + index,
        newTr, editableTable.rows[index].element);
    assertEquals('New row has correct number of TDs',
        3, newTr.getElementsByTagName('td').length);
  }

  function testInsertRowAtBeginning() {
    var tr = testObjects.basic.insertRow(0);
    _testInsertRowResult(testElements.basic, testObjects.basic, tr, 0);
  }

  function testInsertRowInMiddle() {
    var tr = testObjects.basic.insertRow(2);
    _testInsertRowResult(testElements.basic, testObjects.basic, tr, 2);
  }

  function testInsertRowAtEnd() {
    assertEquals('Table has expected number of existing rows',
        4, testObjects.basic.rows.length);
    var tr = testObjects.basic.insertRow(4);
    _testInsertRowResult(testElements.basic, testObjects.basic, tr, 4);
  }

  function testInsertRowAtEndNoIndexArgument() {
    assertEquals('Table has expected number of existing rows',
        4, testObjects.basic.rows.length);
    var tr = testObjects.basic.insertRow();
    _testInsertRowResult(testElements.basic, testObjects.basic, tr, 4);
  }

  function testInsertRowAtBeginningRowspan() {
    // Test inserting a row when the existing DOM row at that index has
    // a cell with a rowspan. This should be just like a regular insert -
    // the rowspan shouldn't have any effect.
    assertEquals('Cell has starting rowspan',
        2,
        goog.dom.getFirstElementChild(
        testElements.torture.getElementsByTagName('tr')[0]).rowSpan);
    var tr = testObjects.torture.insertRow(0);
    // Among other things this verifies that the new row has 3 child TDs.
    _testInsertRowResult(testElements.torture, testObjects.torture, tr, 0);
  }

  function testInsertRowAtEndingRowspan() {
    // Test inserting a row when there's a cell in a previous DOM row
    // with a rowspan that extends into the row with the given index
    // and ends there. This should be just like a regular insert -
    // the rowspan shouldn't have any effect.
    assertEquals('Cell has ending rowspan',
        4,
        goog.dom.getLastElementChild(
        testElements.torture.getElementsByTagName('tr')[5]).rowSpan);
    var tr = testObjects.torture.insertRow();
    // Among other things this verifies that the new row has 3 child TDs.
    _testInsertRowResult(testElements.torture, testObjects.torture, tr, 9);
  }

  function testInsertRowAtSpanningRowspan() {
    // Test inserting a row at an index where there's a cell with a rowspan
    // that begins in a previous row and continues into the next row. In this
    // case the existing cell's rowspan should be extended, and the new
    // tr should have one less child element.
    var rowSpannedCell = testObjects.torture.rows[7].columns[2];
    assertTrue('Existing cell has overlapping rowspan',
        rowSpannedCell.startRow == 5 && rowSpannedCell.endRow == 8);
    var tr = testObjects.torture.insertRow(7);
    assertEquals('New DOM row has one less cell',
        2, tr.getElementsByTagName('td').length);
    assertEquals('Rowspanned cell listed in new EditableRow\'s columns',
        testObjects.torture.rows[6].columns[2].element,
        testObjects.torture.rows[7].columns[2].element);
  }

  function _testInsertColumnResult(newCells, element, editableTable, index) {
    for (var rowNo = 0, row; row = editableTable.rows[rowNo]; rowNo++) {
      assertEquals('Row includes new column',
          4, row.columns.length);
    }
    assertEquals('New cell in correct position',
        newCells[0], editableTable.rows[0].columns[index].element);
  }

  function testInsertColumnAtBeginning() {
    var startColCount = testObjects.basic.rows[0].columns.length;
    var newCells = testObjects.basic.insertColumn(0);
    assertEquals('New cell added for each row',
        testObjects.basic.rows.length, newCells.length);
    assertEquals('Insert column incremented column length',
        startColCount + 1, testObjects.basic.rows[0].columns.length);
    _testInsertColumnResult(newCells, testElements.basic, testObjects.basic, 0);
  }

  function testInsertColumnAtEnd() {
    var startColCount = testObjects.basic.rows[0].columns.length;
    var newCells = testObjects.basic.insertColumn(3);
    assertEquals('New cell added for each row',
        testObjects.basic.rows.length, newCells.length);
    assertEquals('Insert column incremented column length',
        startColCount + 1, testObjects.basic.rows[0].columns.length);
    _testInsertColumnResult(newCells, testElements.basic, testObjects.basic, 3);
  }

  function testInsertColumnAtEndNoIndexArgument() {
    var startColCount = testObjects.basic.rows[0].columns.length;
    var newCells = testObjects.basic.insertColumn();
    assertEquals('New cell added for each row',
        testObjects.basic.rows.length, newCells.length);
    assertEquals('Insert column incremented column length',
        startColCount + 1, testObjects.basic.rows[0].columns.length);
    _testInsertColumnResult(newCells, testElements.basic, testObjects.basic, 3);
  }

  function testInsertColumnInMiddle() {
    var startColCount = testObjects.basic.rows[0].columns.length;
    var newCells = testObjects.basic.insertColumn(2);
    assertEquals('New cell added for each row',
        testObjects.basic.rows.length, newCells.length);
    assertEquals('Insert column incremented column length',
        startColCount + 1, testObjects.basic.rows[0].columns.length);
    _testInsertColumnResult(newCells, testElements.basic, testObjects.basic, 2);
  }

  function testInsertColumnAtBeginning() {
    var startColCount = testObjects.basic.rows[0].columns.length;
    var newCells = testObjects.basic.insertColumn(0);
    assertEquals('Insert column incremented column length',
        startColCount + 1, testObjects.basic.rows[0].columns.length);
    _testInsertColumnResult(newCells, testElements.basic, testObjects.basic, 0);
  }

  function testInsertColumnAtBeginningColSpan() {
    var cells = testObjects.torture.insertColumn(0);
    tableSanityCheck(testObjects.torture, 9, 4);
    assertEquals('New cell was added before colspanned cell',
        1, testObjects.torture.rows[3].columns[0].colSpan);
    assertEquals('New cell was added and returned',
        testObjects.torture.rows[3].columns[0].element,
        cells[3]);
  }

  function testInsertColumnAtEndingColSpan() {
    var cells = testObjects.torture.insertColumn();
    tableSanityCheck(testObjects.torture, 9, 4);
    assertEquals('New cell was added after colspanned cell',
        1, testObjects.torture.rows[0].columns[3].colSpan);
    assertEquals('New cell was added and returned',
        testObjects.torture.rows[0].columns[3].element,
        cells[0]);
  }

  function testInsertColumnAtSpanningColSpan() {
    assertEquals('Existing cell has expected colspan',
        3, testObjects.torture.rows[4].columns[1].colSpan);
    var cells = testObjects.torture.insertColumn(1);
    tableSanityCheck(testObjects.torture, 9, 4);
    assertEquals('Existing cell increased colspan',
        4, testObjects.torture.rows[4].columns[1].colSpan);
    assertEquals('3 cells weren\'t created due to existing colspans',
        6, cells.length);
  }

  function testRemoveFirstRow() {
    var originalRow = testElements.basic.getElementsByTagName('tr')[0];
    testObjects.basic.removeRow(0);
    tableSanityCheck(testObjects.basic, 3, 3);
    assertNotEquals('Row was removed from table element',
        originalRow, testElements.basic.getElementsByTagName('tr')[0]);
  }

  function testRemoveLastRow() {
    var originalRow = testElements.basic.getElementsByTagName('tr')[3];
    testObjects.basic.removeRow(3);
    tableSanityCheck(testObjects.basic, 3, 3);
    assertNotEquals('Row was removed from table element',
        originalRow, testElements.basic.getElementsByTagName('tr')[3]);
  }

  function testRemoveMiddleRow() {
    var originalRow = testElements.basic.getElementsByTagName('tr')[2];
    testObjects.basic.removeRow(2);
    tableSanityCheck(testObjects.basic, 3, 3);
    assertNotEquals('Row was removed from table element',
        originalRow, testElements.basic.getElementsByTagName('tr')[2]);
  }

  function testRemoveRowAtBeginingRowSpan() {
    var originalRow = testObjects.torture.removeRow(0);
    tableSanityCheck(testObjects.torture, 8, 3);
    assertNotEquals('Row was removed from table element',
        originalRow, testElements.basic.getElementsByTagName('tr')[0]);
    assertEquals('Rowspan correctly adjusted',
        1, testObjects.torture.rows[0].columns[0].rowSpan);
  }

  function testRemoveRowAtEndingRowSpan() {
    var originalRow = testElements.torture.getElementsByTagName('tr')[8];
    testObjects.torture.removeRow(8);
    tableSanityCheck(testObjects.torture, 8, 3);
    assertNotEquals('Row was removed from table element',
        originalRow, testElements.basic.getElementsByTagName('tr')[8]);
    assertEquals('Rowspan correctly adjusted',
        3, testObjects.torture.rows[7].columns[2].rowSpan);
  }

  function testRemoveRowAtSpanningRowSpan() {
    var originalRow = testElements.torture.getElementsByTagName('tr')[7];
    testObjects.torture.removeRow(7);
    tableSanityCheck(testObjects.torture, 8, 3);
    assertNotEquals('Row was removed from table element',
        originalRow, testElements.basic.getElementsByTagName('tr')[7]);
    assertEquals('Rowspan correctly adjusted',
        3, testObjects.torture.rows[6].columns[2].rowSpan);
  }

  function _testRemoveColumn(index) {
    var sampleCell = testElements.basic.getElementsByTagName(
        'tr')[0].getElementsByTagName('th')[index];
    testObjects.basic.removeColumn(index);
    tableSanityCheck(testObjects.basic, 4, 2);
    assertNotEquals(
        'Test cell removed from column',
        sampleCell,
        testElements.basic.getElementsByTagName(
        'tr')[0].getElementsByTagName('th')[index]);
  }

  function testRemoveFirstColumn() {
    _testRemoveColumn(0);
  }

  function testRemoveMiddleColumn() {
    _testRemoveColumn(1);
  }

  function testRemoveLastColumn() {
    _testRemoveColumn(2);
  }

  function testRemoveColumnAtStartingColSpan() {
    testObjects.torture.removeColumn(0);
    tableSanityCheck(testObjects.torture, 9, 2);
    assertEquals('Colspan was decremented correctly',
        1,
        testElements.torture.getElementsByTagName(
        'tr')[5].getElementsByTagName('th')[0].colSpan);
  }

  function testRemoveColumnAtEndingColSpan() {
    testObjects.torture.removeColumn(2);
    tableSanityCheck(testObjects.torture, 9, 2);
    assertEquals('Colspan was decremented correctly',
        1,
        testElements.torture.getElementsByTagName(
        'tr')[1].getElementsByTagName('td')[0].colSpan);
  }

  function testRemoveColumnAtSpanningColSpan() {
    testObjects.torture.removeColumn(2);
    tableSanityCheck(testObjects.torture, 9, 2);
    assertEquals('Colspan was decremented correctly',
        2,
        testElements.torture.getElementsByTagName(
        'tr')[4].getElementsByTagName('th')[0].colSpan);
  }

  function testMergeCellsInRow() {
    testObjects.basic.mergeCells(0, 0, 0, 2);
    tableSanityCheck(testObjects.basic, 4, 3);
    var trs = testElements.basic.getElementsByTagName('tr');
    assertEquals('Cells merged',
        1, trs[0].getElementsByTagName('th').length);
    assertEquals('Merged cell has correct colspan',
        3, trs[0].getElementsByTagName('th')[0].colSpan);
    assertEquals('Merged cell has correct rowspan',
        1, trs[0].getElementsByTagName('th')[0].rowSpan);
  }

  function testMergeCellsInColumn() {
    testObjects.basic.mergeCells(0, 0, 2, 0);
    tableSanityCheck(testObjects.basic, 4, 3);
    var trs = testElements.basic.getElementsByTagName('tr');
    assertEquals('Other cells still in row',
        3, trs[0].getElementsByTagName('th').length);
    assertEquals('Merged cell has correct colspan',
        1, trs[0].getElementsByTagName('th')[0].colSpan);
    assertEquals('Merged cell has correct rowspan',
        3, trs[0].getElementsByTagName('th')[0].rowSpan);
    assert('Cell appears in multiple rows after merge',
        testObjects.basic.rows[0].columns[0] ==
        testObjects.basic.rows[2].columns[0]);
  }

  function testMergeCellsInRowAndColumn() {
    testObjects.basic.mergeCells(1, 1, 3, 2);
    tableSanityCheck(testObjects.basic, 4, 3);
    var trs = testElements.basic.getElementsByTagName('tr');
    var mergedCell = trs[1].getElementsByTagName('td')[1];
    assertEquals('Merged cell has correct rowspan',
        3, mergedCell.rowSpan);
    assertEquals('Merged cell has correct colspan',
        2, mergedCell.colSpan);
  }

  function testMergeCellsAlreadyMerged() {
    testObjects.torture.mergeCells(5, 0, 8, 2);
    tableSanityCheck(testObjects.torture, 9, 3);
    var trs = testElements.torture.getElementsByTagName('tr');
    var mergedCell = trs[5].getElementsByTagName('th')[0];
    assertEquals('Merged cell has correct rowspan',
        4, mergedCell.rowSpan);
    assertEquals('Merged cell has correct colspan',
        3, mergedCell.colSpan);
  }

  function testIllegalMergeNonRectangular() {
    // This should fail because it involves trying to merge two parts
    // of a 3-colspan cell with other cells
    var mergeSucceeded = testObjects.torture.mergeCells(3, 1, 5, 2);
    if (mergeSucceeded) {
      throw 'EditableTable allowed impossible merge!';
    }
    tableSanityCheck(testObjects.torture, 9, 3);
  }

  function testIllegalMergeSingleCell() {
    // This should fail because it involves merging a single cell
    var mergeSucceeded = testObjects.torture.mergeCells(0, 1, 0, 1);
    if (mergeSucceeded) {
      throw 'EditableTable allowed impossible merge!';
    }
    tableSanityCheck(testObjects.torture, 9, 3);
  }

  function testSplitCell() {
    testObjects.torture.splitCell(1, 1);
    tableSanityCheck(testObjects.torture, 9, 3);
    var trs = testElements.torture.getElementsByTagName('tr');
    assertEquals('Cell was split into multiple columns in row 1',
        3, trs[1].getElementsByTagName('*').length);
    assertEquals('Cell was split into multiple columns in row 2',
        3, trs[2].getElementsByTagName('*').length);
  }

  function testChildTableRowsNotCountedInParentTable() {
    tableSanityCheck(testObjects.nested, 2, 3);
    for (var i = 0; i < testObjects.nested.rows.length; i++) {
      var tr = testObjects.nested.rows[i].element;
      // A tr's parent is tbody, parent of that is table - check to
      // make sure the ancestor table is as expected. This means
      // that none of the child table's rows have been erroneously
      // loaded into the EditableTable.
      assertEquals('Row is child of parent table',
          testElements.nested,
          tr.parentNode.parentNode);
    }
  }

}
/*
  // TODO(user): write more unit tests for selection stuff.
  // The following code is left in here for reference in implementing
  // this TODO.

    var tds = goog.dom.getElement('test1').getElementsByTagName('td');
    var range = goog.dom.Range.createFromNodes(tds[7], tds[9]);
    range.select();
    var cellSelection = new goog.editor.Table.CellSelection(range);
    assertEquals(0, cellSelection.getFirstColumnIndex());
    assertEquals(2, cellSelection.getLastColumnIndex());
    assertEquals(2, cellSelection.getFirstRowIndex());
    assertEquals(2, cellSelection.getLastRowIndex());
    assertTrue(cellSelection.isRectangle());

    range = goog.dom.Range.createFromNodes(tds[7], tds[12]);
    range.select();
    var cellSelection2 = new goog.editor.Table.CellSelection(range);
    assertFalse(cellSelection2.isRectangle());
*/
