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How to use FooRuntimeException class of com.sksamuel.kotest.throwablehandling package

Best Kotest code snippet using com.sksamuel.kotest.throwablehandling.FooRuntimeException

CovariantThrowableHandlingTest.kt

Source:CovariantThrowableHandlingTest.kt

...16   init {17      "Should throw" - {18         "Should throw a new exception" - {19            "When no exception is thrown" {20               onShouldThrowMatcher<FooRuntimeException> { shouldThrowMatcher ->21                  verifyNoExceptionThrownError(FooRuntimeException::class) {22                     shouldThrowMatcher { /* No exception is thrown */ }23                  }24               }25            }26            "When an exception is thrown, but it's not the right class" {27               val instanceToThrow = NullPointerException()28               onShouldThrowMatcher<FooRuntimeException> { shouldThrowMatcher ->29                  verifyThrowsWrongExceptionClass(30                     instanceToThrow,31                     FooRuntimeException::class,32                     NullPointerException::class33                  ) {34                     shouldThrowMatcher { throw instanceToThrow }35                  }36               }37            }38            "When an exception is thrown, but it's the parent class of the right class" {39               val instanceToThrow = ParentException()40               onShouldThrowMatcher<SubException> { shouldThrowMatcher ->41                  verifyThrowsWrongExceptionClass(instanceToThrow, SubException::class, ParentException::class) {42                     shouldThrowMatcher { throw instanceToThrow }43                  }44               }45            }46         }47         "Should throw the thrown exception" - {48            "When an exception is thrown, but it's an Assertion Error (special case) when it's not expected" {49               val thrownInstance = AssertionError()50               onShouldThrowMatcher<FooRuntimeException> { shouldThrowMatcher ->51                  verifyThrowsAssertionErrorInstance(thrownInstance) {52                     shouldThrowMatcher { throw thrownInstance }53                  }54               }55            }56         }57         "Should return the thrown exception" - {58            "When an exception is thrown and it's exactly the right class" {59               val thrownException = FooRuntimeException()60               onShouldThrowMatcher<FooRuntimeException> { shouldThrowMatcher ->61                  verifyReturnsExactly(thrownException) {62                     shouldThrowMatcher { throw thrownException }63                  }64               }65            }66            "When an exception is thrown and it's a subclass of the right class" {67               val thrownException = SubException()68               onShouldThrowMatcher<ParentException> { shouldThrowMatcher ->69                  verifyReturnsExactly(thrownException) {70                     shouldThrowMatcher { throw thrownException }71                  }72               }73            }74            "When an AssertionError is thrown and it's exactly the right class" {75               val thrownException = AssertionError()76               onShouldThrowMatcher<AssertionError> { shouldThrowMatcher ->77                  verifyReturnsExactly(thrownException) {78                     shouldThrowMatcher { throw thrownException }79                  }80               }81            }82            "When a subclass of AssertionError is thrown, and we're expecting an AssertionError" {83               val thrownException = AssertionErrorSubclass()84               onShouldThrowMatcher<AssertionError> { shouldThrowMatcher ->85                  verifyReturnsExactly(thrownException) {86                     shouldThrowMatcher { throw thrownException }87                  }88               }89            }90         }91      }92      "Should not throw" - {93         "Should throw an assertion error wrapping the thrown exception" - {94            "When it's an instance of the right class" {95               val thrownException = FooRuntimeException()96               onShouldNotThrowMatcher<FooRuntimeException> { shouldNotThrowMatcher ->97                  verifyThrowsAssertionWrapping(thrownException) {98                     shouldNotThrowMatcher { throw thrownException }99                  }100               }101            }102            "When it's a subclass of the right class" {103               val thrownException = SubException()104               onShouldNotThrowMatcher<ParentException> { shouldNotThrowMatcher ->105                  verifyThrowsAssertionWrapping(thrownException) {106                     shouldNotThrowMatcher { throw thrownException }107                  }108               }109            }110         }111         "Should throw the thrown exception" - {112            "When it's not an instance nor subclass of the right class" {113               val thrownException = FooRuntimeException()114               onShouldNotThrowMatcher<ParentException> { shouldNotThrowMatcher ->115                  verifyThrowsExactly(thrownException) {116                     shouldNotThrowMatcher { throw thrownException }117                  }118               }119            }120            "When it's an instance of the parent class of the right class" {121               val thrownException = ParentException()122               onShouldNotThrowMatcher<SubException> { shouldNotThrowMatcher ->123                  verifyThrowsExactly(thrownException) {124                     shouldNotThrowMatcher { throw thrownException }125                  }126               }127            }...

StrictThrowableHandlingTest.kt

Source:StrictThrowableHandlingTest.kt

...13  init {14    "Should throw exactly" - {15      "Should throw a new exception" - {16        "When no exception is thrown" {17          onShouldThrowExactlyMatcher<FooRuntimeException> { shouldThrowExactlyMatcher ->18            verifyNoExceptionThrownError(FooRuntimeException::class) {19              shouldThrowExactlyMatcher { /* No exception is thrown */ }20            }21          }22        }23        "When an exception is thrown, but it's not the right class" {24          val instanceToThrow = NullPointerException()25          onShouldThrowExactlyMatcher<FooRuntimeException> { shouldThrowExactlyMatcher ->26            verifyThrowsWrongExceptionClass(instanceToThrow, FooRuntimeException::class, NullPointerException::class) {27              shouldThrowExactlyMatcher { throw instanceToThrow }28            }29          }30        }31        "When an exception is thrown, but it's the parent class of the right class" {32          val instanceToThrow = ParentException()33          onShouldThrowExactlyMatcher<SubException> { shouldThrowExactlyMatcher ->34            verifyThrowsWrongExceptionClass(instanceToThrow, SubException::class, ParentException::class) {35              shouldThrowExactlyMatcher { throw instanceToThrow }36            }37          }38        }39        "When an exception is thrown, but it's subclass of the right class" {40          val instanceToThrow = SubException()41          onShouldThrowExactlyMatcher<ParentException> { shouldThrowExactlyMatcher ->42            verifyThrowsWrongExceptionClass(instanceToThrow, ParentException::class, SubException::class) {43              shouldThrowExactlyMatcher { throw instanceToThrow }44            }45          }46        }47      }48      "Should throw the thrown exception" - {49        "When an exception is thrown, and it's an Assertion Error (special case) when it's not the expected error" {50          val thrownInstance = AssertionError()51          onShouldThrowExactlyMatcher<FooRuntimeException> { shouldThrowExactlyMatcher ->52            verifyThrowsAssertionErrorInstance(thrownInstance) {53              shouldThrowExactlyMatcher { throw thrownInstance }54            }55          }56        }57      }58      "Should return the thrown exception" - {59        "When an exception is thrown, and it's exactly the right class" {60          val thrownException = FooRuntimeException()61          onShouldThrowExactlyMatcher<FooRuntimeException> { shouldThrowExactlyMatcher ->62            verifyReturnsExactly(thrownException) {63              shouldThrowExactlyMatcher { throw thrownException }64            }65          }66        }67        "When an AssertionError is thrown, and it's exactly the right class" {68          val thrownException = AssertionError()69          onShouldThrowExactlyMatcher<AssertionError> { shouldThrowExactlyMatcher ->70            verifyReturnsExactly(thrownException) {71              shouldThrowExactlyMatcher { throw thrownException }72            }73          }74        }75      }76    }77    "Should not throw exactly" - {78      "Should throw an assertion error wrapping the thrown exception" - {79        "When the exact class is thrown" {80          val thrownException = FooRuntimeException()81          onShouldNotThrowExactlyMatcher<FooRuntimeException> { shouldNotThrowExactlyMatcher ->82            verifyThrowsAssertionWrapping(thrownException) {83              shouldNotThrowExactlyMatcher { throw thrownException }84            }85          }86        }87      }88      "Should throw the thrown exception" - {89        "When it's a subclass of the expected type" {90          val thrownException = SubException()91          onShouldNotThrowExactlyMatcher<ParentException> { shouldNotThrowExactlyMatcher ->92            verifyThrowsExactly(thrownException) {93              shouldNotThrowExactlyMatcher { throw thrownException }94            }95          }96        }97        "When it's a super class of the expected type" {98          val thrownException = ParentException()99          onShouldNotThrowExactlyMatcher<SubException> { shouldNotThrowExactlyMatcher ->100            verifyThrowsExactly(thrownException) {101              shouldNotThrowExactlyMatcher { throw thrownException }102            }103          }104        }105        "When it's unrelated to the expected type" {106          val thrownException = FooRuntimeException()107          onShouldNotThrowExactlyMatcher<ParentException> { shouldNotThrowExactlyMatcher ->108            verifyThrowsExactly(thrownException) {109              shouldNotThrowExactlyMatcher { throw thrownException }110            }111          }112        }113      }114      "Should not throw anything" - {115        "When nothing is thrown" {116          onShouldNotThrowExactlyMatcher<FooRuntimeException> { shouldNotThrowExactlyMatcher ->117            verifyNoErrorIsThrown {118              shouldNotThrowExactlyMatcher { /* Success */ }119            }120          }121        }122      }123    }124  }125  private inline fun <reified T : Throwable> onShouldThrowExactlyMatcher(func: (ShouldThrowExactlyMatcher<T>) -> Unit) {126    func(::shouldThrowExactlyUnit)127    func { shouldThrowExactly(it) }128  }129  private fun verifyNoExceptionThrownError(expectedClass: KClass<*>, block: () -> Unit) {130    val throwable = catchThrowable(block)131    throwable.shouldBeInstanceOf<AssertionError>()132    throwable.message shouldBe "Expected exception ${expectedClass.qualifiedName} but no exception was thrown."133  }134  private fun verifyThrowsAssertionErrorInstance(assertionErrorInstance: AssertionError, block: () -> Unit) {135    val throwable = catchThrowable(block)136    (throwable === assertionErrorInstance).shouldBeTrue()137  }138  private fun verifyThrowsWrongExceptionClass(thrownInstance: Throwable, expectedClass: KClass<*>, incorrectClass: KClass<*>, block: () -> Unit) {139    val throwable = catchThrowable(block)140    throwable.shouldBeInstanceOf<AssertionError>()141    throwable.message shouldBe "Expected exception ${expectedClass.qualifiedName} but a ${incorrectClass.simpleName} was thrown instead."142    (throwable.cause === thrownInstance).shouldBeTrue()143  }144  private fun verifyReturnsExactly(thrownException: Throwable, block: () -> Any?) {145    val actualReturn = block()146    (thrownException === actualReturn).shouldBeTrue()147  }148  private inline fun <reified T : Throwable> onShouldNotThrowExactlyMatcher(func: (ShouldNotThrowExactlyMatcher) -> Unit) {149    func { shouldNotThrowExactly<T>(it) }150    func { shouldNotThrowExactlyUnit<T>(it) }151  }152  private fun verifyThrowsAssertionWrapping(thrownException: FooRuntimeException, block: () -> Unit) {153    val thrown = catchThrowable(block)154    thrown!!.shouldBeInstanceOf<AssertionError>()155    thrown.message shouldBe "No exception expected, but a FooRuntimeException was thrown."156    thrown.cause shouldBeSameInstanceAs thrownException157  }158  private fun verifyThrowsExactly(thrownException: Throwable, block: () -> Unit) {159    catchThrowable(block).shouldBeSameInstanceAs(thrownException)160  }161  private fun verifyNoErrorIsThrown(block: () -> Unit) {162    block()163  }164}165private typealias ShouldThrowExactlyMatcher<T> = (() -> Unit) -> T166private typealias ShouldNotThrowExactlyMatcher = (() -> Unit) -> Unit...

AnyThrowableHandlingTest.kt

Source:AnyThrowableHandlingTest.kt

...20          }21        }22        "Should return the thrown instance" - {23          "When an exception is thrown in the code" {24            val instanceToThrow = FooRuntimeException()25            verifyReturnsExactly(instanceToThrow) {26              shouldThrowAnyMatcher { throw instanceToThrow }27            }28          }29        }30      }31    }32    onShouldNotThrowAnyMatcher { shouldNotThrowAnyMatcher ->33      "Should not throw any($shouldNotThrowAnyMatcher)" - {34        "Should throw an exception" - {35          "When any exception is thrown in the code" {36            val exception = FooRuntimeException()37            verifyThrowsAssertionWrapping(exception) {38              shouldNotThrowAnyMatcher { throw exception }39            }40          }41        }42        "Should not throw an exception" - {43          "When no exception is thrown in the code" {44            verifyNoErrorIsThrown {45              shouldNotThrowAnyMatcher { /* Nothing thrown */ }46            }47          }48        }49      }50    }...

ThrowableHandlingScenarioHelpers.kt

Source:ThrowableHandlingScenarioHelpers.kt

1package com.sksamuel.kotest.throwablehandling2class FooRuntimeException : RuntimeException()3open class ParentException : Throwable()4class SubException : ParentException()5fun catchThrowable(block: () -> Any?): Throwable? {6  return try {7    block()8    null9  } catch (t: Throwable) { t }10}...

FooRuntimeException

Using AI Code Generation

1    import com.sksamuel.kotest.throwablehandling.FooRuntimeException2    fun foo() {3        throw FooRuntimeException()4    }5    fun bar() {6        import com.sksamuel.kotest.throwablehandling.FooRuntimeException7        fun foo() {8            throw FooRuntimeException()9        }10        fun bar() {11            throw RuntimeException()12        }13        fun baz() {14            throw Exception()15        }16    }17    fun baz() {18        throw Exception()19    }20    testImplementation("io.kotest:kotest-assertions-core-jvm:4.4.1")

FooRuntimeException

Using AI Code Generation

1    }2    fun `should pass when exception is thrown and expected exception is a subclass of it`() {3    }4    fun `should fail when exception is thrown and expected exception is not a subclass of it`() {5    }6    fun `should fail when exception is not thrown and expected exception is a subclass of it`() {7    }8    fun `should fail when exception is not thrown and expected exception is not a subclass of it`() {9    }10}

FooRuntimeException

Using AI Code Generation

1class FooTest : ShouldSpec() {2  init {3    should("throw exception") {4      shouldThrow<FooRuntimeException> {5        throw FooRuntimeException("foo")6      }7    }8  }9}10"hello world" shouldMatch Regex("hello.*")11"hello world" shouldNotMatch Regex("Hello.*")12"123" shouldContainOnlyDigits()13"123abc" shouldNotContainOnlyDigits()14"abc" shouldContainOnlyLetters()

FooRuntimeException

Using AI Code Generation

1@Throws(FooRuntimeException::class)2fun foo() {3throw FooRuntimeException()4}5}6I have a project that I am working on with a colleague. I have a class that I am trying to test. I am trying to throw an exception in the method I am testing, but I am not sure how to do this. I have tried to use the @Throws annotation, but that doesn't seem to work. Here is my code:Here is the test class:Here is the error I am getting:org.opentest4j.AssertionFailedError: Unexpected exception type thrown ==> expected: <com.sksamuel.kotest.throwablehandling.FooRuntimeException> but was: <kotlin.KotlinNullPointerException>at io.kotest.engine.spec.SpecRunnerKt$executeSpec$1$1$1$1$1.invoke(SpecRunner.kt:129)at io.kotest.engine.spec.SpecRunnerKt$executeSpec$1$1$1$1$1.invoke(SpecRunner.kt)at io.kotest.core.test.TestCaseExecutor$executeTest$1.invokeSuspend(TestCaseExecutor.kt:133)at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:56)at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)I am not sure what I am doing wrong. Any help would be greatly appreciated. Thank you!

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