Verify Error Signals

Write a StepVerifier test for a Flux that emits "OK" then throws an IllegalStateException("Boom"). Verify the element, then verify the error. Print "Error test passed!".

expectError() verifies that the stream terminates with an error.

Expected

Error test passed!

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Main.kt

Verify Error Signals

medium⏱ 15 minkotlinreactorchallengetesting

Write a StepVerifier test for a Flux that emits "OK" then throws an IllegalStateException("Boom"). Verify the element, then verify the error. Print "Error test passed!".

expectError() verifies that the stream terminates with an error.

Why this works

expectError(Class) verifies the stream terminated with a specific error type. Unlike verifyComplete(), .verify() is used after expectError() to trigger the verification.

Expected output

Error test passed!

Reactor Challenges/Testing Reactive Code

Medium Testing Reactive Code

Verify Error Signals

Write a StepVerifier test for a Flux that emits "OK" then throws an IllegalStateException("Boom"). Verify the element, then verify the error. Print "Error test passed!".

expectError() verifies that the stream terminates with an error.

Expected

Error test passed!

Previous Next

Main.kt

Verify Error Signals

medium⏱ 15 minkotlinreactorchallengetesting

Write a StepVerifier test for a Flux that emits "OK" then throws an IllegalStateException("Boom"). Verify the element, then verify the error. Print "Error test passed!".

expectError() verifies that the stream terminates with an error.

Why this works

expectError(Class) verifies the stream terminated with a specific error type. Unlike verifyComplete(), .verify() is used after expectError() to trigger the verification.

Expected output

Error test passed!