UnitTest Class Reference

This is a base class for classes that perform a unit test. More...

Public Member Functions
	UnitTest (const String &name)
	Creates a test with the given name. More...
virtual	~UnitTest ()
	Destructor. More...
const String &	getName () const noexcept
	Returns the name of the test. More...
void	performTest (UnitTestRunner *runner)
	Runs the test, using the specified UnitTestRunner. More...
virtual void	initialise ()
	You can optionally implement this method to set up your test. More...
virtual void	shutdown ()
	You can optionally implement this method to clear up after your test has been run. More...
virtual void	runTest ()=0
	Implement this method in your subclass to actually run your tests. More...
void	beginTest (const String &testName)
	Tells the system that a new subsection of tests is beginning. More...
void	expect (bool testResult, const String &failureMessage=String())
	Checks that the result of a test is true, and logs this result. More...
template<class ValueType >
void	expectEquals (ValueType actual, ValueType expected, String failureMessage=String())
	Compares two values, and if they don't match, prints out a message containing the expected and actual result values. More...
void	logMessage (const String &message)
	Writes a message to the test log. More...
Random	getRandom () const
	Returns a shared RNG that all unit tests should use. More...

Static Public Member Functions
static Array< UnitTest * > &	getAllTests ()
	Returns the set of all UnitTest objects that currently exist. More...

Detailed Description

This is a base class for classes that perform a unit test.

To write a test using this class, your code should look something like this:

class MyTest  : public UnitTest
{
public:
    MyTest()  : UnitTest ("Foobar testing") {}

    void runTest() override
    {
        beginTest ("Part 1");

        expect (myFoobar.doesSomething());
        expect (myFoobar.doesSomethingElse());

        beginTest ("Part 2");

        expect (myOtherFoobar.doesSomething());
        expect (myOtherFoobar.doesSomethingElse());

        ...etc..
    }
};

// Creating a static instance will automatically add the instance to the array
// returned by UnitTest::getAllTests(), so the test will be included when you call
// UnitTestRunner::runAllTests()
static MyTest test;

To run a test, use the UnitTestRunner class.

See also

UnitTestRunner

Constructor & Destructor Documentation

UnitTest::UnitTest ( const String &  name )

explicit

Creates a test with the given name.

virtual UnitTest::~UnitTest ( )

virtual

Destructor.

Member Function Documentation

const String& UnitTest::getName ( ) const

noexcept

Returns the name of the test.

void UnitTest::performTest

(

UnitTestRunner *

runner

)

Runs the test, using the specified UnitTestRunner.

You shouldn't need to call this method directly - use UnitTestRunner::runTests() instead.

static Array<UnitTest*>& UnitTest::getAllTests ( )

static

Returns the set of all UnitTest objects that currently exist.

virtual void UnitTest::initialise ( )

virtual

You can optionally implement this method to set up your test.

This method will be called before runTest().

virtual void UnitTest::shutdown ( )

virtual

You can optionally implement this method to clear up after your test has been run.

This method will be called after runTest() has returned.

virtual void UnitTest::runTest ( )

pure virtual

Implement this method in your subclass to actually run your tests.

The content of your implementation should call beginTest() and expect() to perform the tests.

void UnitTest::beginTest

(

const String &

testName

)

Tells the system that a new subsection of tests is beginning.

This should be called from your runTest() method, and may be called as many times as you like, to demarcate different sets of tests.

void UnitTest::expect	(	bool	testResult,
		const String &	failureMessage = String()
	)

Checks that the result of a test is true, and logs this result.

In your runTest() method, you should call this method for each condition that you want to check, e.g.

void runTest()
{
    beginTest ("basic tests");
    expect (x + y == 2);
    expect (getThing() == someThing);
    ...etc...
}

If testResult is true, a pass is logged; if it's false, a failure is logged. If the failure message is specified, it will be written to the log if the test fails.

template<class ValueType >

void UnitTest::expectEquals	(	ValueType	actual,
		ValueType	expected,
		String	failureMessage = String()
	)

Compares two values, and if they don't match, prints out a message containing the expected and actual result values.

void UnitTest::logMessage

(

const String &

message

)

Writes a message to the test log.

This can only be called from within your runTest() method.

Random UnitTest::getRandom

(

)

const

Returns a shared RNG that all unit tests should use.

If a test needs random numbers, it's important that when an error is found, the exact circumstances can be re-created in order to re-test the problem, by repeating the test with the same random seed value. To make this possible, the UnitTestRunner class creates a master seed value for the run, writes this number to the log, and then this method returns a Random object based on that seed. All tests should only use this method to create any Random objects that they need.

Note that this method will return an identical object each time it's called for a given run, so if you need several different Random objects, the best way to do that is to call Random::combineSeed() on the result to permute it with a constant value.

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The documentation for this class was generated from the following file:

• juce_UnitTest.h