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How to use shouldNotThrow method of io.kotest.assertions.throwables.CovariantThrowableHandling class

Best Kotest code snippet using io.kotest.assertions.throwables.CovariantThrowableHandling.shouldNotThrow

shouldNotThrow

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1class  CovariantThrowableHandling {2     fun  shouldNotThrow(block:  () ->  Unit) {3         try  {4            block()5        }  catch  (t: Throwable) {6             throw  AssertionFailedError( "Expected no exception, but found $t" )7        }8    }9}10class  CovariantThrowableHandling {11     fun  shouldThrow(block:  () ->  Unit) {12         try  {13            block()14             throw  AssertionFailedError( "Expected exception, but found none" )15        }  catch  (t: Throwable) {16        }17    }18}19class  CovariantThrowableHandling {20     fun  <T : Throwable> shouldThrow(block:  () ->  Unit, clazz: KClass<T>): T {21         try  {22            block()23             throw  AssertionFailedError( "Expected exception $clazz, but found none" )24        }  catch  (t: Throwable) {25             if  (clazz.isInstance(t)) {26                 return  clazz.cast(t)27            }  else  {28                 throw  AssertionFailedError( "Expected exception $clazz, but found $t" )29            }30        }31    }32}33class  CovariantThrowableHandling {34     fun  <T : Throwable> shouldThrow(block:  () ->  Unit, clazz: KClass<T>, message: String): T {35         try  {36            block()37             throw  AssertionFailedError( "Expected exception $clazz, but found none" )38        }  catch  (t: Throwable) {39             if  (clazz.isInstance(t)) {40                 if  (actual != message) {41                     throw  AssertionFailedError( "Expected exception with message \"$message\", but found \"$actual\"" )42                }43                 return  clazz.cast(t)44            }  else  {45                 throw  AssertionFailedError( "Expected exception $clazz, but found $t" )46            }47        }48    }49}

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