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No-magic Scala test framework concept
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// admittedly there is some optional implicit magic below to reduce some boiler place, | |
// but it is only using implicits, not runtime reflection as many test frameworks do | |
// usage: stand-alone test | |
object MyTest extends Test( | |
assert(2 == 1+1) | |
) | |
// usage: test suite | |
object MySuite extends TestSuite( | |
test{ // anonymous test | |
assert(2 == 1+1) | |
}, | |
test("my test"){ // named test | |
assert(2 == 1+1) | |
}, | |
"my test"{ // optional magic String#apply extension method | |
assert(2 == 1+1) | |
}, | |
// optional magic conversion for anonymous test | |
assert(2 == 1+1) | |
) | |
// usage: test suite | |
// Framework | |
object assert{ | |
/** | |
value capturing assert macro as in Scala Test for better error messages | |
admittedly this is magical, but not in terms of semantics, only in terms of better error messages | |
*/ | |
def apply(expr: => Boolean): Unit = macro ... | |
} | |
trait Test{ | |
def main(args: Array[String]): Unit | |
} | |
case class TestCase(name: String)(val code: => Unit) extends Test{ | |
def this(code: => Unit) = this(this.getClass.getSimpleName)(code) | |
def main(args: Array[String]) = code | |
} | |
object test{ | |
def apply(name: String)(val code: => Unit) = TestCase(name)(code) | |
def apply(code: => Unit) = TestCase(code) | |
} | |
abstract class TestSuite(tests: Test*) extends Test{ | |
def main(args: Array[String]) = tests.foreach{ | |
test => try{ | |
test.main(Array()) | |
} catch { | |
case e:AssertionError => TestLogger.failure(e) | |
case e:Exception => TestLogger.exception(e) | |
} | |
} | |
} | |
/** optional implicit magic to save 6 chars per test if really wanted */ | |
implicit class StringTestExtensions(name: String){ | |
def apply(code: => Unit) = test(name)(code) | |
} | |
/** optional implicit magic to save 6 chars per test if really wanted */ | |
implicit object UnitToTest{ | |
def apply(code: => Unit) = test(code) | |
} |
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