无法覆盖1行如果声明 [英] Unable to Cover 1 Line in If statment

问题描述

	private object ReadNextObject()
        {
			if (currentLine == null)
				return null;

			// Check to see if the next value is quoted
			bool quoted = false;
			if (currentLine.StartsWith("\""))
				quoted = true;

			// Find the end of the next value
			string nextObjectString = "";
			int i = 0;
			int len = currentLine.Length;
			bool foundEnd = false;
			while (!foundEnd && i <= len)
			{
				// Check if we've hit the end of the string
				if ((!quoted && i == len) // non-quoted strings end with a comma or end of line
					|| (!quoted && currentLine.Substring(i, 1) == ",")
					// quoted strings end with a quote followed by a comma or end of line
					|| (quoted && i == len - 1 && currentLine.EndsWith("\""))
					|| (quoted && currentLine.Substring(i, 2) == "\","))
					foundEnd = true;
				else
					i++;
			}
			if (quoted)
			{
                if (i > len || !currentLine.Substring(i, 1).StartsWith("\""))
                    throw new FormatException("Invalid CSV format: " + currentLine.Substring(0, i));
				i++;
			}
			nextObjectString = currentLine.Substring(0, i).Replace("\"\"", "\"");

			if (i < len)
				currentLine = currentLine.Substring(i + 1);
			else
				currentLine = "";

			if (quoted)
			{
				if (nextObjectString.StartsWith("\""))
					nextObjectString = nextObjectString.Substring(1);
				if (nextObjectString.EndsWith("\""))
					nextObjectString = nextObjectString.Substring(0, nextObjectString.Length - 1);
				return nextObjectString;
			}
			else
			{
				object convertedValue;
				StringConverter.ConvertString(nextObjectString, out convertedValue);
				return convertedValue;
			}
		}

我需要对代码进行单元测试....

I Need to Unit Test Above Code....

if (i > len || !currentLine.Substring(i, 1).StartsWith("\""))
                    throw new FormatException("Invalid CSV format: " + currentLine.Substring(0, i));
				i++;

无法掩盖抛出异常......我需要存根或模拟来覆盖这条线......

Not able to Cover Throw Exception...Do I Need Stub or Mock to Cover this Line...

如果是这样我怎么能这样做..

If so how can i Do that..

当前测试。

public void Test_ReadNextObject_19()
        {
            object returnValue = string.Empty;
            try
            {
                
                privateClass.SetField("currentLine", "\"\"\"\"");
				privateClass.GetField("currentLine").ToString()));
                returnValue = privateClass.Invoke("ReadNextObject");
                
            }
            catch (FormatException ex)
            {
                returnValue = ex.Message;
            }
           
        }

当前测试用例SetField"" \" \ " \" \"" ..

Current Test Case SetField ""\"\"\"\"" ..

推荐答案

嗨ID GO，

< span style ="line-height：107％; font-family：'Segoe UI'，sans-serif; font-size：10pt">>>

我需要Stub或Mock来覆盖这条线......

基于代码"私有对象ReadNextObject（）... "，这是一种私人方法。你必须模仿这个私有方法。但是测试私有方法没有意义。因为
他们没有公共行为，除了可以通过定义类的公共方法访问的行为，他们的行为应该通过测试公共方法来测试。

是否有其他方法可以调用此私有方法？如果是这样，你可以从你调用的方法写，然后，就不需要模拟了。

另外，请看一下这个帖子"单元测试如何确认异常被抛出"：

https://stackoverflow.com/questions/6125143/how-can-a-unit-测试 - 确认 - 例外 - 已被抛出

问候，

Judyzh

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