defaultparamtest.groovy

来自「Groovy动态语言 运行在JVM中的动态语言 可以方便的处理业务逻辑变化大的业」· GROOVY 代码 · 共 75 行

class DefaultParamTest extends GroovyTestCase {

    void testDefaultParameters() {
    
    	def value = doSomething("X", "Y", "Z")
    	assert value == "X-Y-Z"
    	
    	value = doSomething("X", "Y")
    	assert value == "X-Y-defC"
    	
    	value = doSomething("X")
    	assert value == "X-defB-defC"
    	
    	shouldFail { doSomething() }
    }

    void testDefaultTypedParameters() {
    	def value = doTypedSomething("X", "Y", "Z")
    	assert value == "X-Y-Z"
    	
    	value = doTypedSomething("X", "Y")
    	assert value == "X-Y-defC"
    	
    	value = doTypedSomething("X")
    	assert value == "X-defB-defC"
    	
    	value = doTypedSomething()
    	assert value == "defA-defB-defC"
    }

    void testDefaultTypedParametersAnother() {
    	def value = doTypedSomethingAnother("X", "Y", "Z")
    	assert value == "X-Y-Z"
    	
    	value = doTypedSomethingAnother("X", "Z")
    	assert value == "X-defB-Z"
    	
    	value = doTypedSomethingAnother("Z")
    	assert value == "defA-defB-Z"
    	
    	shouldFail{ value = doTypedSomethingAnother() }
    }


    def doSomething(a, b = 'defB', c = 'defC') {
        println "Called with a: ${a}, b ${b}, c ${c}"

        return a + "-" + b + "-" + c
    }

    String doTypedSomething(String a = 'defA', String b = 'defB', String c = 'defC') {
        println "Called typed method with a: ${a}, b ${b}, c ${c}"

        return a + "-" + b + "-" + c
    }

    String doTypedSomethingAnother(String a = 'defA', String b = 'defB', String c) {
        println "Called typed method with a: ${a}, b ${b}, c ${c}"

        return a + "-" + b + "-" + c
    }
    
    void testConstructor() {
        assert DefaultParamTestTestClass.declaredConstructors.size() == 2
        def foo = new DefaultParamTestTestClass()
        assert foo.j == 1
        foo = new DefaultParamTestTestClass(2)
        assert foo.j == 2
    }
}

class DefaultParamTestTestClass {
  def j
  DefaultParamTestTestClass(int i = 1){j=i}
}