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How to use verifyThrowsExactly method of com.sksamuel.kotest.throwablehandling.CovariantThrowableHandlingTest class

Best Kotest code snippet using com.sksamuel.kotest.throwablehandling.CovariantThrowableHandlingTest.verifyThrowsExactly

CovariantThrowableHandlingTest.kt

Source:CovariantThrowableHandlingTest.kt

...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            }128         }129         "Should not throw an exception" - {130            "When no exception is thrown" {131               onShouldNotThrowMatcher<ParentException> { shouldNotThrowMatcher ->132                  val thrown = catchThrowable {133                     shouldNotThrowMatcher { /* Nothing thrown */ }134                  }135                  thrown shouldBe null136               }137            }138         }139      }140      "should throw with message" - {141         "When the correct exception is thrown, but the message is wrong" {142            onShouldThrowWithMessageMatcher<Exception>("foo") { shouldThrowMatcher ->143               verifyThrowsWrongExceptionMessage("foo", "bar") {144                  shouldThrowMatcher { throw Exception("bar") }145               }146            }147         }148         "Exception class type should have priority in assertion" {149            val instanceToThrow = Exception("foo")150            runCatching {151               shouldThrowWithMessage<RuntimeException>("bar") {152                  throw instanceToThrow153               }154            }155               .exceptionOrNull() shouldBe AssertionError("Expected exception java.lang.RuntimeException but a Exception was thrown instead.")156         }157      }158   }159   private fun <T> onShouldThrowWithMessageMatcher(message: String, func: (ShouldThrowMatcher<T>) -> Unit) {160      func { shouldThrowUnitWithMessage(message, it) }161      func { shouldThrowWithMessage(message, it) }162   }163   private inline fun <reified T : Throwable> onShouldThrowMatcher(func: (ShouldThrowMatcher<T>) -> Unit) {164      func(::shouldThrowUnit)165      func { shouldThrow(it) }166   }167   private fun verifyNoExceptionThrownError(expectedClass: KClass<*>, block: () -> Unit) {168      val throwable = catchThrowable(block)169      throwable.shouldBeInstanceOf<AssertionError>()170      throwable.message shouldBe "Expected exception ${expectedClass.qualifiedName} but no exception was thrown."171   }172   private fun verifyThrowsAssertionErrorInstance(assertionErrorInstance: AssertionError, block: () -> Unit) {173      val throwable = catchThrowable(block)174      (throwable === assertionErrorInstance).shouldBeTrue()175   }176   private fun verifyThrowsWrongExceptionClass(177      thrownInstance: Throwable,178      expectedClass: KClass<*>,179      incorrectClass: KClass<*>,180      block: () -> Unit181   ) {182      val throwable = catchThrowable(block)183      throwable.shouldBeInstanceOf<AssertionError>()184      throwable.message shouldBe "Expected exception ${expectedClass.qualifiedName} but a ${incorrectClass.simpleName} was thrown instead."185      (throwable.cause === thrownInstance).shouldBeTrue()186   }187   private fun verifyThrowsWrongExceptionMessage(188      expectedMessage: String,189      actualMessage: String,190      block: () -> Unit191   ) {192      val throwable = catchThrowable(block)193      throwable.shouldBeInstanceOf<AssertionError>()194      throwable.message shouldBe "Expected exception message $expectedMessage but was $actualMessage instead."195   }196   private fun verifyReturnsExactly(thrownException: Throwable, block: () -> Any?) {197      val actualReturn = block()198      (thrownException === actualReturn).shouldBeTrue()199   }200   private inline fun <reified T : Throwable> onShouldNotThrowMatcher(func: (ShouldNotThrowMatcher<T>) -> Unit) {201      func { shouldNotThrowUnit<T> { it() } }202      func { shouldNotThrow<T>(it) }203   }204   private fun verifyThrowsAssertionWrapping(exception: Throwable, block: () -> Unit) {205      val thrown = catchThrowable(block)206      thrown.shouldBeInstanceOf<AssertionError>()207      thrown.message shouldBe "No exception expected, but a ${exception::class.simpleName} was thrown."208      thrown.cause shouldBeSameInstanceAs exception209   }210   private fun verifyThrowsExactly(exception: Throwable, block: () -> Unit) {211      val thrown = catchThrowable(block)212      thrown shouldBeSameInstanceAs exception213   }214}215private typealias ShouldThrowMatcher<T> = (() -> Unit) -> T216private typealias ShouldNotThrowMatcher<T> = (() -> Unit) -> Unit...

verifyThrowsExactly

Using AI Code Generation

1import io.kotest.assertions.throwablehandling.shouldThrowExactly2import io.kotest.core.spec.style.FunSpec3import io.kotest.matchers.shouldBe4import java.io.IOException5class CovariantThrowableHandlingTest : FunSpec({6    test("shouldThrowExactly should match the expected exception") {7        shouldThrowExactly<IOException> {8            throw IOException("boom")9        }10    }11    test("shouldThrowExactly should fail if the expected exception is not thrown") {12        shouldThrowExactly<IOException> {13            throw IllegalArgumentException("boom")14        }15    }16    test("shouldThrowExactly should match the expected exception and message") {17        shouldThrowExactly<IOException>("boom") {18            throw IOException("boom")19        }20    }21    test("shouldThrowExactly should fail if the expected exception is not thrown with the expected message") {22        shouldThrowExactly<IOException>("boom") {23            throw IOException("boom2")24        }25    }26    test("shouldThrowExactly should fail if the expected exception is not thrown with a message that contains the expected message") {27        shouldThrowExactly<IOException>("boom") {28            throw IOException("boom2")29        }30    }31    test("shouldThrowExactly should match the expected exception and message using a matcher") {32        shouldThrowExactly<IOException> { e ->33        }34    }35    test("shouldThrowExactly should fail if the expected exception is not thrown with the expected message using a matcher") {36        shouldThrowExactly<IOException> { e ->37        }38    }39    test("shouldThrowExactly should fail if the expected exception is not thrown with a message that contains the expected message using a matcher") {40        shouldThrowExactly<IOException> { e ->41        }42    }43    test("shouldThrowExactly should match the expected exception and message using a string matcher") {44        shouldThrowExactly<IOException>("boom") {45            throw IOException("boom")46        }47    }48    test("shouldThrowExactly should fail if the expected exception is not thrown with the expected message using a string matcher") {49        shouldThrowExactly<IOException>("boom") {50            throw IOException("boom2")51        }52    }53    test("shouldThrowExactly should fail if the expected exception is not thrown with

verifyThrowsExactly

Using AI Code Generation

1    fun `verifyThrowsExactly should throw an exception if the given block does not throw an exception`() {2        val block: () -> Unit = {}3        val exception = shouldThrowExactly<AssertionError> {4            verifyThrowsExactly<Throwable>(block)5        }6    }7    fun `verifyThrowsExactly should throw an exception if the given block throws an exception of a different type`() {8        val block: () -> Unit = { throw IllegalArgumentException() }9        val exception = shouldThrowExactly<AssertionError> {10            verifyThrowsExactly<Throwable>(block)11        }12    }13    fun `verifyThrowsExactly should not throw an exception if the given block throws an exception of the given type`() {14        val block: () -> Unit = { throw Throwable() }15        verifyThrowsExactly<Throwable>(block)16    }17    fun `verifyThrowsExactly should throw an exception if the given block does not throw an exception`() {18        val block: () -> Unit = {}19        val exception = shouldThrowExactly<AssertionError> {20            verifyThrowsExactly<Throwable>(block)21        }22    }23    fun `verifyThrowsExactly should throw an exception if the given block throws an exception of a different type`() {24        val block: () -> Unit = { throw IllegalArgumentException() }25        val exception = shouldThrowExactly<AssertionError> {26            verifyThrowsExactly<Throwable>(block)27        }28    }

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