简单的单元测试框架

做了个简单的单元测试框架，只算个毛坯，遇到一些问题。

1、由于没有完整的堆栈跟踪，所以无法打印出断言失败的行号。
2、无法获得行号，成功、失败或异常都需要显示这个。
3、由于unittest关键字后面的块是一个函数，所以把这个单元测试放在里面时，成了内嵌类，这时D禁止调用static ctor。当然这不算是个大问题。

只做了简单输出，没什么实际用途。代码如下：

class TestCase
{
	public
	template TestCases(Methods ...)
	{
		static this()
		{
			typeof(this) instance = new typeof(this);
			instance.setUp();
			instance.beginTest((typeof(this)).classinfo.name);
			mixin (_TestCases!(Methods));
			instance.endTest();
			instance.tearDown();
		}
	}

	protected:

	void setUp(){}

	void tearDown(){}

	void beginTest(char[] classname)
	{
		this.classname = classname;
	}

	void endTest()
	{
	}

	void assertEqual(T,U)(T t, U u)
	{
		bool pass = (t == u);
		addTestResult(classname, methodname, pass, std.string.format("assertEqual(", t, ", ", u, ")"));
	}

	void assertNotEqual(T,U)(T t, U u)
	{
		bool pass = (t != u);
		addTestResult(classname, methodname, pass, std.string.format("assertNotEqual(", t, ", ", u, ")"));
	}

	private:
	void beginMethodTest(char[] methodname)
	{
		this.methodname = methodname;
	}

	void endMethodTest()
	{

	}

	void runTest(lazy void dg)
	{
		writefln("runTest: " ~ methodname);
		try
		{
			dg();
		}
		catch(Exception ex)
		{
			addTestException(classname, methodname, ex);
		}
	}

	void addTestResult(char[] classname, char[] methodname, bool pass, char[] info)
	{
		writefln("in ", classname, ".", methodname, " ", info, ", result: ", pass);
	}

	void addTestException(char[] classname, char[] methodname, Exception ex)
	{
		writefln("in ", classname, ".", methodname, " ", ex);
	}

	template _TestCases(Methods ...)
	{
		static if (Methods.length > 0)
		{
			const char[] _TestCases = 
				"instance.beginMethodTest(\"" ~ Methods[0] ~ "\");\n" ~ 
				"instance.runTest(instance." ~ Methods[0] ~ "());\n" ~
				"instance.endMethodTest();\n" ~
				_TestCases!(Methods[1..$]);
		}
		else
		{
			const char[] _TestCases = "";
		}
	}

	char[] classname;
	char[] methodname;
}

import std.stdio;


class MathTest : TestCase
{
	mixin TestCases!(
		"testFoo",
		"testBar"
	);

	void setUp()
	{
		writefln("setUp");
	}

	void tearDown()
	{
		writefln("tearDown");
	}

	void testFoo()
	{
		assertEqual(1, 1);
		assertNotEqual(1, 0);
	}

	void testBar()
	{
		assertEqual(1, 0); // must fail
		assertNotEqual(1, 1); // must fail
	}
}


void main()
{
}

输出：
setUp
runTest: testFoo
in unittest.MathTest.testFoo assertEqual(1, 1), result: true
in unittest.MathTest.testFoo assertNotEqual(1, 0), result: true
runTest: testBar
in unittest.MathTest.testBar assertEqual(1, 0), result: false
in unittest.MathTest.testBar assertNotEqual(1, 1), result: false
tearDown

评论

1 楼 h_rain 2007-04-10  

赞！