我怎樣才能

Question

我想了解如何測試用戶的輸入（請注意我不是試圖做一個模擬試驗，但實際用戶輸入的測試）

目前在Java單元測試用戶輸入您可能會在我的程序中看到我硬編碼了測試用例的值，並且它正在通過所有測試，但是如何獲取用戶輸入並進行測試。

有沒有一種方法可以在我的構造函數中調用System.in，並在測試類中創建MyClass1實例時傳遞它？

請儘可能給我一些示例代碼，以便我能更好地理解。

如果我有一個接口，這樣

public interface IMyClass{ 
    public int getvalue1(); 
    public int getvalue2(); 
    public int getvalue3(); 
} 

然後接口實現這樣

public class MyClass1 implements MyClass{ 

private int _value1 = 0; 
private int _value2 = 0; 
private int _value3 = 0; 



public MyClass1(int number1, int number2, int number3) 
{ 

    _value1 = number1; 
    _value2 = number2; 
    _value3 = number3; 
} 

public void setLength1(int value1) 
{ 
    _value1 = value1; 
} 

public void setLength2(int length2) 
{ 
    _value2 = value2; 
} 

public void setLength3(int length3) 
{ 
    _value3 = value3; 
} 

public int getValue1() 
{ 
    return _value1; 
} 

public int getValue2() 
{ 
    return _value2; 
} 

public int getValue3() 
{ 
    return _value3; 
} 
} 

最後一個測試類這樣：

public class ClasTest extends TestCase { 

public void testNumbers() 
{ 
    MyClass1 numbers= new MyClass1(1,2,3); 
    assertThat(numbers.getValue1(),is(not(numbers.getValue2()))); 

} 
} 

三江源，我很欣賞任何幫助。

Answer 1

用戶Scanner類

public void testNumbers() 
{ 

    Scanner scan = new Scanner(System.in); 
    System.out.println("value1"); 
    int value1 = scan.nextInt(); 

    System.out.println("value2"); 
    int value2 = scan.nextInt(); 

    System.out.println("value3"); 
    int value3 = scan.nextInt(); 

    MyClass1 numbers= new MyClass1(value1, value2, value3); 
    assertThat(numbers.getValue1(),is(not(numbers.getValue2()))); 

} 

Answer 2

使用System.setIn(new InputSteam());，然後寫在傳遞給System.in

看到輸入流：JUnit: How to simulate System.in testing?

單輸入

String data = "Users Input"; 
System.setIn(new ByteArrayInputStream(data.getBytes())); 

Scanner scanner = new Scanner(System.in); 
System.out.println(scanner.nextLine()); 

結果

Users Input 

多輸入

String data = "Users Input" + 
     "\nA second line of user input."; 
System.setIn(new ByteArrayInputStream(data.getBytes())); 

Scanner scanner = new Scanner(System.in); 
System.out.println("Line 1: " + scanner.nextLine()); 
System.out.println("Line 2: " + scanner.nextLine()); 

結果

Line 1: Users Input 
Line 2: A second line of user input. 

Answer 3

如果在UNIX

java MyProgram < sampleinput.txt