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package fit.decorator.util;

import static org.junit.Assert.assertEquals;

import fit.Parse;
import fit.decorator.exceptions.InvalidInputException;
import org.junit.Before;
import org.junit.Test;

public class TableTest {
  private String fitPage = ""
    + ""
    + "eg.Division
numerator denominator quotient()
10 2 5";
  private Table table;

  @Before
  public void setUp() throws Exception {
    table = new Table(fitPage);
  }

  @Test
  public void testToStringShouldParseTableWithMultipleRowsAndColumns() throws Exception {
    assertTable(fitPage);
  }

  @Test
  public void testConstructorShouldBuildTableFromParseObject() throws Exception {
    String expectedTableContents = "fit.decorator.MaxTime10";
    Parse parse = new Parse(expectedTableContents, new String[]
      {"tr", "td"});
    table = new Table(parse);
    assertTable(expectedTableContents);
  }

  @Test
  public void testCopyAndAppendLastRow() throws Exception {
    table.copyAndAppendLastRow(1);
    String expectedTableContents = ""
      + ""
      + "" + "eg.Division
numerator denominator quotient()
10 2 5
10 2 5";
    assertTable(expectedTableContents);
  }

  @Test
  public void testCopyAndAppendLastRowMultipleTimes() throws Exception {
    table.copyAndAppendLastRow(3);
    String expectedTableContents = ""
      + ""
      + ""
      + "" + "eg.Division
numerator denominator quotient()
10 2 5
10 2 5
10 2 5
10 2 5";
    assertTable(expectedTableContents);
  }

  @Test
  public void testCopyAndAppendLastRowZeroTime() throws Exception {
    table.copyAndAppendLastRow(0);
    assertTable(fitPage);
  }

  @Test
  public void testIncrementColumnValueThrowsInvalidInputExceptionIfColumnNameIsNotFound() throws Exception {
    try {
      table.incrementColumnValues(1, "invalidColumnName", null);
    } catch (InvalidInputException e) {
      assertEquals("'invalidColumnName' was not found in the table " + fitPage, e.getMessage());
    }
  }

  @Test
  public void testIncrementColumnValueShouldAddTheGivenDeltaToAllRowsOfTheGivenColumn() throws Exception {
    table.incrementColumnValues("denominator", new Delta("int", "1"), 1);
    assertTable(fitPage);
  }

  @Test
  public void testIncrementColumnValueShouldIncrementallyAddTheGivenDeltaMultipleTimes() throws Exception {
    table.incrementColumnValues(3, "denominator", new Delta("int", "1"));
    String expectedFitPage = ""
      + ""
      + ""
      + "eg.Division
numerator denominator quotient()
10 2 5
10 3 5
10 4 5";
    assertTable(expectedFitPage);
  }

  @Test
  public void testInsertAsFirstRow() throws Exception {
    Parse firstRow = new Parse("first row", new String[]
      {"tr", "td"});
    table.insertAsFirstRow(firstRow);
    String expectedTableContents = ""
      + ""
      + "first row
eg.Division
numerator denominator quotient()
10 2 5";
    assertTable(expectedTableContents);
  }

  @Test
  public void testStripFirstRow() throws Exception {
    table.stripFirstRow();
    String expectedTableContents = "" + ""
      + "numerator denominator quotient()
10 2 5";
    assertTable(expectedTableContents);
  }

  @Test
  public void testColumnNumberShouldReturnColumnNumberForTheGivenColumnName() throws Exception {
    assertEquals(0, table.columnNumberContainingText("numerator", 1));
    assertEquals(1, table.columnNumberContainingText("denominator", 1));
    assertEquals(2, table.columnNumberContainingText("quotient()", 1));
  }

  @Test
  public void testColumnNumberShouldThrowsInvalidInputExceptionIfColumnNameIsNotFound() throws Exception {
    try {
      table.columnNumberContainingText("invalidColumnName", 1);
    } catch (InvalidInputException e) {
      assertEquals("'invalidColumnName' was not found in the table " + fitPage, e.getMessage());
    }
  }

  @Test
  public void testColumnValueShouldReturnColumnValueForTheGivenColumnNumber() throws Exception {
    assertEquals("10", table.columnValue(2, 0));
    assertEquals("2", table.columnValue(2, 1));
    assertEquals("5", table.columnValue(2, 2));
  }

  @Test
  public void testGetLastRow() throws Exception {
    Parse lastRow = table.lastRow();
    String expectedLastRow = "1025";
    assertParseObject(expectedLastRow, lastRow);
  }

  @Test
  public void testGetSecondLastRow() throws Exception {
    String fitPage = ""
      + ""
      + "" + "eg.Division
numerator denominator quotient()
10 2 5
5 1 5";
    table = new Table(fitPage);
    Parse secondLastRow = table.secondLastRow(table.lastRow());
    String expectedSecondLastRow = "1025";
    assertParseObject(expectedSecondLastRow, secondLastRow);
  }

  @Test
  public void testRowNumberContainingTextShouldReturnIndexOfTheRowContainingTheText() throws Exception {
    assertEquals(0, table.rowNumberContainingText("eg.Division"));
    assertEquals(1, table.rowNumberContainingText("numerator"));
    assertEquals(1, table.rowNumberContainingText("denominator"));
  }

  @Test
  public void testRowNumberContainingTextShouldThrowInvalidInputExceptionIfSearchTextIsNotFound() throws Exception {
    try {
      table.rowNumberContainingText("invalidColumnName");
    } catch (InvalidInputException e) {
      assertEquals("'invalidColumnName' was not found in the table " + fitPage, e.getMessage());
    }
  }

  @Test
  public void testCopyAndAppendLastRowShouldLeaveTheTableAsItIsIfTotalRowsAreLessThanThree() throws Exception {
    String fitPage = ""
      + "eg.Division
numerator denominator quotient()";
    table = new Table(fitPage);
    table.copyAndAppendLastRow(4);
    assertTable(fitPage);
  }

  private void assertTable(String expectedTableContents) {
    assertEquals(expectedTableContents, table.toString());
  }

  private void assertParseObject(String expectedTableContents, Parse parse) {
    assertEquals(expectedTableContents, new Table(parse).toString());
  }
}