比较两个DataTables(单元测试,集成测试,C#,TestMethod)

Question

在比较应该是不同的并且具有多行的数据表时,应该在单元测试中执行什么样的测试.

    [TestMethod]
    public void ExecuteOutWithMultipleDataTables()
    {
        //Arrange
        int id1 = TestOrderBuilder.New().Build();
        DataTable dtDefault = CreateDefaultDataTable(id1, "OUT", "TableDesc", DateTime.Now);

        //Act
        object[] result = OracleDatabase.ExecuteOut(SqlStatements.Cursor, procedureParameters);
        DataTable dtResults = result[0] as DataTable;

        //Assert
        Assert.IsNotNull(dtDefault);
        Assert.IsNotNull(dtResults);
        Assert.AreNotEqual(dtDefault, dtResults);
        Assert.AreNotSame(dtDefault.Rows[0][0], dtResults.Rows[0][0]);
        Assert.AreNotSame(dtDefault.Rows[0][1], dtResults.Rows[0][1]);
    }

这是我已经写过的一些例子,但我不确定我是否在正确的轨道上.

有人有建议吗？

苹果电脑

Answer 1

如果需要验证每个行和列值,则需要编写辅助方法.

此外,它看起来不像单元测试,因为它看起来你正在调用真正的数据库,而不是嘲笑它.

可能是下面的东西

private bool IsTableSame(DataTable t1, DataTable t2)
    {
        if (t1 == null)
            return false;
        if (t2 == null)
            return false;
        if (t1.Rows.Count != t2.Rows.Count)
            return false;

        if (t1.Columns.Count != t2.Columns.Count)
            return false;

        if (t1.Columns.Cast<DataColumn>().Any(dc => !t2.Columns.Contains(dc.ColumnName)))
        {
            return false;
        }

        for (int i = 0; i <= t1.Rows.Count-1; i++)
        {
            if (t1.Columns.Cast<DataColumn>().Any(dc1 => t1.Rows[i][dc1.ColumnName].ToString() != t2.Rows[i][dc1.ColumnName].ToString()))
            {
                return false;
            } 
        }

        return true;
    }

Answer 2

我已经包装了上面相同的辅助方法来使用断言。它有助于调试单元测试。

private void AssertTableRecordsAreEqual(DataTable expectedTable, DataTable actualTable)
    {
        Assert.IsNotNull(actualTable, "Table is empty");
        Assert.AreEqual(expectedTable.Columns.Count, actualTable.Columns.Count, "Number of columns in actual and expected tables are different");
        Assert.AreEqual(expectedTable.Rows.Count, actualTable.Rows.Count, "Number of records in actual and expected tables are different");
        Assert.IsFalse(expectedTable.Columns.Cast<DataColumn>().Any(dc => !actualTable.Columns.Contains(dc.ColumnName)), "Table column names are different");

        for (int i = 0; i <= expectedTable.Rows.Count - 1; i++)
        {
            Assert.IsFalse(expectedTable.Columns.Cast<DataColumn>().Any(dc1 => expectedTable.Rows[i][dc1.ColumnName].ToString() != actualTable.Rows[i][dc1.ColumnName].ToString()), "Table row value is different");
        }
    }