kotlin.test / kotlin.test / Asserter / assertTrue assertTrue Common JVM JS Native 1.0 open fun assertTrue( lazyMessage: () -> String?, actual: Boolean): Unit(source) Asserts that the specified value is true. Parameters lazyMessage - the function to return a message to report if the assertion fails. Common JVM JS Native 1.0 open fun assertTrue(message: String?, actual: Boolean): Unit(source) Asserts that the specified value is true. Parameters message - the message to report if the assertion fails.