Nunit Quick GuideNunit Quick Guide

23年 4月 21日

목 차

OS2 강의교재 2

Assert.That(bool)Assert.That(bool, string)Assert.That(bool, string, params object[])

Assert.That

Mona’s C# 3

Assert.AreEqual(expected, actual [, string message])Assert.AreEqual(expected, actual, tolerance [, string message])

실수형 표기는 한계가 있음 . Tolerance 는 그 오차허용치를 지정함그렇지 않으면 모두 실패로 뜸

Assert.AreEqual

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Assert.Less(x, y)Assert.Greater(x, y)

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Assert.LessOrEqual(x, y)Assert.GreaterOrEqual(x, y)

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Assert.IsNull(object [,string message])Assert.IsNotNull(object [,string message])

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Assert.AreSame(expected, actual [,string message])

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Assert.IsTrue(bool condition [,string message])Assert.IsFalse(bool condition [,string message])

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Assert.Fail([string message])

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Contraint-based AssertContraint-based Assert

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Nunit.Framework.SyntaxHelpersIs.EqualTo()

Assert.That(actual, Is.EqualTo(expected))

Is.Not.EqualTo()Assert.That(actual, Is.Not.EqualTo(expected))

Is.AtMost()Assert.That(actual, Is.AtMost(expected))Is.LessThenOrEqualTo() 의 Alias method

Is.Null()Assert.That(expected, Is.Null);

Is.Not.Null()Assert.That(expected, Is.Not.Null);Assert.That(expected, !Is.Null);

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Is.Empty()Assert.That(expected, Is.Empty);

Is.AtLeast()Assert.That(actual, Is.AtLeast(expected);

Is.InstanceOfTypeAssert.That(actual, Is.InstanceOfType(expected));

Has.Length()Assert.That(actual, Has.Length(expected));

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nunit-console library.dll /fixture:ClassName

nunit-console

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TSP tsp;

[Setup]public void Setup(){ tsp = new TSP();}

Setup attribute

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[Category(“Long”)]Public void UseCities(){ Assert.That(tsp.ShortestPath(5), Is.AtMost(140));}

Category

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SetupSetup

TestTest

TearDownTearDown

[TestFixtureSetUp][TestFixtureTearDown]클래스 단위로 설정하고 정리하는 작업이 필요할 때

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List.ContainsAssert.That({1,2,3}, List.Contains(2));

Is.SubsetOfAssert.That(new byte[]{1,2,3}, IsSubsetOf(new byte[]{ 1,2,3,4,5});

Text.StartsWithAssert.That(“header:data.”, Text.StartsWith(“header:”));Assert.That(“header:data.”, Text.StartsWith(“headeR:”).IgnoreCase);

Text.MatchesAssert.That(“header:data.”, Text.Matches(@”header.*\.”));

Mona’s C# 19

FileAssert.AreEqual/AreNotEqualFileAssert.AreEqual(FileInfo expected, FileInfo actual)FileAssert.AreEqual(string pathToExpected, string pathToActual)Ex. 스트림이 바이트 단위로 일치하는지 확인

FileAssert

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Stream expectedStream = File.OpenRead(“expected.bin”);

Stream actualStream = File.OpenRead(“actual.bin”);

Assert.That( actualStream, isEqualTo(expectedStream) );

Custom Assert

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using System;using NUnit.Framework;using NUnit.Framework.SyntaxHelpers;

public class MoneyAssert{// Assert that the amount of money is an even// number of dollars (no cents)public static void AssertNoCents(Money amount,String message){Assert.That(Decimal.Truncate(amount.AsDecimal()),Is.EqualTo(amount.AsDecimal()),message);}// Assert that the amount of money is an even// number of dollars (no cents)public static void AssertNoCents(Money amount){AssertNoCents(amount, String.Empty);}}

test to ensure that the exception is thrown as expected.[Test]public void NullList(){try{WhitePages.ImportList(null);Assert.Fail("ArgumentNullException should have been thrown" );}catch (ArgumentNullException){}}

Testing Exception

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[TestFixture]public class ImportListTests{[Test][ExpectedException(typeof(ArgumentNullException))]public void NullList() {WhitePages.ImportList(null);// Shouldn’t get to here}}

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[Test][Ignore("Out of time. Will Continue Monday. --AH" )]public void Something(){xxx xxx xxxxxx xxxxx xxxx;}ExceptionTest.csNUnit will report

Ignoring Test

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[Test][Platform(Exclude = "Mono" )]public void RemoveOnEmpty() {xxx xx xxx xxxxx xx xx xxx;}[Test, Platform(Exclude = "Net-1.0,Win95" )]public void EmptyStatusBar() {xxx xx xxx xxxxx xx xx xxx;}

Ignoring Platform Dependent Test

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Right BICEPRight: Right Results?B: Boundary conditionI: check Inverse RelationshipsC: Cross-check results using other meansE: force Error conditions to happenP: Performance characteristics within bounds

What To Test?

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Using Data Files

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using NUnit.Framework;using NUnit.Framework.SyntaxHelpers;using System;using System.IO;using System.Collections.Generic;[TestFixture]public class LargestDataFileTests{private int[] getNumberList(string line){string[] tokens = line.Split(null);List<int> numberList = new List<int>();for (int i=1; i < tokens.Length; i++){numberList.Add(Int32.Parse(tokens[i]));}return numberList.ToArray();}

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private int getLargestNumber(string line){string[] tokens = line.Split(null);string val = tokens[0];int expected = Int32.Parse(val);return expected;}private bool hasComment(string line){return line.StartsWith("#" );}

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// Run all the tests in testdata.txt (does not test// exception case). We’ll get an error if any of the// file I/O goes wrong.[Test]public void FromFile(){string line;// most IDEs output the test bi-nary in bin/[Debug,Release]StreamReader reader =new StreamReader("../../testdata.txt" );while ((line = reader.ReadLine()) != null){if (hasComment(line)){continue;}int[] numberListForLine = getNumberList(line);int expectedLargestNumber = getLargestNumber(line);int actualLargestNumber = Cmp.Largest(numberListForLine));Assert.That(expectedLargestNumber, Is.EqualTo(actualLargestNumber));}}

Test File Format

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## Simple tests:#9 7 8 99 9 8 79 9 8 9## Negative number tests:#-7 -7 -8 -9-7 -8 -7 -8-7 -9 -7 -8## Mixture:#7 -9 -7 -8 7 6 49 -1 0 9 -7 4## Boundary conditions:#1 10 02147483647 2147483647-2147483648 -2147483648

Most Bugs happen hereMax, Min values, boundary in arrays, lists• Totally bogus or inconsistent input values, such as a filename of "!*W:X\&Gi/w>g/h#WQ@".• Badly formatted data that is missing delimeters or terminators,such as an e-mail address without a top-leveldomain ("fred@foobar.").2• Empty or missing values (such as 0, 0.0, an empty string,an empty array, or null), or missing in a sequence (suchas a missing TCP packet).• Values far in excess of reasonable expectations, such asa person’s age of 10,000 years or a password string with10,000 characters in it.• Duplicates in lists that shouldn’t have duplicates.• Ordered lists that aren’t, and vice-versa. Try handing apre-sorted list to a sort algorithm, for instance—or evena reverse-sorted list.• Things that arrive out of order, or happen out of expectedorder, such as trying to print a document before loggingin, or getting fragmented IP packets out of order, for instance.

Boundary Conditions

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Conformance — Does the value conform to an expectedformat?• Ordering — Is the set of values ordered or unordered as appropriate?• Range — Is the value within reasonable minimum andmaximum values?• Reference — Does the code reference anything externalthat isn’t under direct control of the code itself?• Existence — Does the value exist (e.g., is non-null, nonzero,present in a set, etc.)?• Cardinality — Are there exactly enough values?• Time (absolute and relative) — Is everything happeningin order? At the right time? In time?

CORRECT in Boundary Conditions

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Format 을 따르나 ?Email 주소 : myid@ring.net

• What if there’s no header, just data and a trailer?• What if there’s no data, just a header and trailer?• What if there’s no trailer, just a header and data?• What if there’s just a trailer?• What if there’s just a header?• What if there’s just data?

Conformance

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순서가 있는 데이터 집합

Ordering

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데이터 종류에 따른 범위나이 , 각도 (angle)

데이터 타입에 따른 범위Int, long 형

Range

Mona’s C# 35

public const int MAX_DIST = 100;static public void AssertPairInRange(Point one,Point two,String message){Assert.That(Math.Abs(one.X - two.X),Is.AtMost(MAX_DIST),message);Assert.That(Math.Abs(one.Y - two.Y),Is.AtMost(MAX_DIST),message);}

Range -2

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public class MyStack{public MyStack(){elements = new string[100];nextIndex = 0;}public String Pop(){return elements[--nextIndex];}// Delete n items from the elements en-massepublic void Delete(int n){nextIndex -= n;}public void Push(string element){elements[nextIndex++] = element;}public String Top(){return elements[nextIndex-1];}private int nextIndex;private string[] elements;}

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public void CheckInvariant(){if (!(nextIndex >= 0 &&nextIndex < elements.Length)){throw new InvariantException("nextIndex out of range: " + nextIndex +" for elements length " + elements.Length);}}MyStack.cs

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using NUnit.Framework;[TestFixture]public class MyStackTest{[Test]public void Empty(){MyStack stack = new MyStack();stack.CheckInvariant();stack.Push("sample" );stack.CheckInvariant();// Popping last element okAssert.That(stack.Pop(),Is.EqualTo("sample" ));stack.CheckInvariant();// Delete from empty stackstack.Delete(1);stack.CheckInvariant();}}

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• Start and End index have the same value• First is greater than Last• Index is negative• Index is greater than allowed• Count doesn’t match actual number of items

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역관계가 성립하는지 확인역으로 계산하는 것도 맞는지 확인반대 관계반대 순서로 했을 때 원 순서가 유지되는지 테스트

Inverse Relationships

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[Test]public void SquareRootUsingInverse() {double x = MyMath.SquareRoot(4.0);Assert.That(4.0, Is.EqualTo(x*x).Within(0.0001));}

계산을 반대로 해보기DB 에서 삽입 <-> 삭제부드러운 이미지 <-> 선명한 이미지

Inverse Relationships Examples

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• Running out of memory• Running out of disk space• Issues with wall-clock time• Network availability and errors• Insufficient File or Path permissions• System load• Limited color palette• Very high or very low video resolution

Force Error Conditions

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데이터 크기에 따른 성능 특성 테스트작은 데이터 집단큰 데이터 집단

Performance Characteristics

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일반원칙망가질 가능성이 있는 모든 것을 테스트한다 .망가지는 모든 것을 테스트한다 .새 코드는 무죄가 증명되기 전까지는 유죄 .적어도 제품 코드만큼 테스트 코드를 작성한다 .컴파일을 할 때마다 지역 테스트를 실행한다 .저장소에 체크인하기 전에 모든 테스트를 실행해본다 .무엇을 테스트해야 하는가 RIGHT-BICEPRight : 결과가 옳은가 ?Boundary : 모든 경계 조건이 CORRECT( 아래 참조 ) 한가 ?Inverse : 역관계를 확인할 수 있는가 ?Cross-check : 다른 수단을 사용해서 결과를 교차 확인 할 수 있는가 ?Error condition : 에러조건을 강제로 만들어 낼 수 있는가 ?Perfomance : 성능 특성이 한도내에 있는가 ?CORRECT 경계 조건Conformance : 예상한 형식과 일치하는가 ?Ordering : 적절한 순서대로 되어있는가 ?Range : 최소값과 최대값사이에 있는가 ?Reference : 외부코드를 참조 하는가 ?Existence : 값이 존재하는가 ?Cardinality : 확실히 충분한 값이 존재하는가 ?Time : 제시간에 때맞추어 일어나는가 ?좋은 테스트는 A-TRIP 해야 한다 .Automatic : 자동적이어야 한다 .Through : 철저해야 한다 .Repeatable : 반복가능해야 한다 .Independent : 독립적이어야 한다 .Professional : 전문적이어야 한다 .

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