how exactly do I use `assert()`? `assert(1 == 1, ...

# getting-started

[oday]

how exactly do I use assert()?

assert(1 == 1, { "Equal" }) shows nothing in the console

[oday]

where do I check the status of this flag?

[Youssef Shoaib [MOD]]

It's the exact opposite actually. Assert prints the message when the condition is false

[oday]

ah, excuse me I can’t read

[oday]

ok so just tried again,

assert(1 == 2, {"not true"})

nothing printed still

[Zun]

The docs: Throws an AssertionError calculated by lazyMessage if the value is false and runtime assertions have been enabled on the JVM using the -ea JVM option.

[Zun]

So make sure that flag is enabled. Maybe this can help: https://www.jetbrains.com/help/idea/tuning-the-ide.html#configure-platform-properties

[ephemient]

or don't use assert, https://www.yegor256.com/2016/06/17/dont-use-java-assertions.html

[ephemient]

Kotlin's assert is missing Java features too: https://youtrack.jetbrains.com/issue/KT-22292

[oday]

yea was just testing it, not looking to rely on it for anything serious at the moment

[ephemient]

given that, might as well use `check`/`require` (or their `*`NotNull shortcuts)