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@file:kotlin.jvm.JvmMultifileClass
@file:kotlin.jvm.JvmName("TestAssertionsKt")
/**
* A number of helper methods for writing unit tests.
*/
package kotlin.test
/** Asserts that the given [block] returns `false`. */
@Deprecated("Use assertFalse instead.", ReplaceWith("assertFalse(message, block)"))
public fun assertNot(message: String, block: () -> Boolean): Unit = assertFalse(message, block)
/** Asserts that the given [block] returns `false`. */
@Deprecated("Use assertFalse instead.", ReplaceWith("assertFalse(null, block)"))
public fun assertNot(block: () -> Boolean): Unit = assertFalse(block = block)
/** Asserts that the given [block] returns `true`. */
public fun assertTrue(message: String? = null, block: () -> Boolean): Unit = assertTrue(block(), message)
/** Asserts that the expression is `true` with an optional [message]. */
public fun assertTrue(actual: Boolean, message: String? = null) {
return asserter.assertTrue(message ?: "Expected value to be true.", actual)
}
/** Asserts that the given [block] returns `false`. */
public fun assertFalse(message: String? = null, block: () -> Boolean): Unit = assertFalse(block(), message)
/** Asserts that the expression is `false` with an optional [message]. */
public fun assertFalse(actual: Boolean, message: String? = null) {
return asserter.assertTrue(message ?: "Expected value to be false.", !actual)
}
/** Asserts that the [expected] value is equal to the [actual] value, with an optional [message]. */
public fun assertEquals(expected: Any?, actual: Any?, message: String? = null) {
asserter.assertEquals(message, expected, actual)
}
/** Asserts that the [actual] value is not equal to the illegal value, with an optional [message]. */
public fun assertNotEquals(illegal: Any?, actual: Any?, message: String? = null) {
asserter.assertNotEquals(message, illegal, actual)
}
/** Asserts that the [actual] value is not `null`, with an optional [message]. */
public fun assertNotNull(actual: T?, message: String? = null): T {
asserter.assertNotNull(message, actual)
return actual!!
}
/** Asserts that the [actual] value is not `null`, with an optional [message] and a function [block] to process the not-null value. */
public fun assertNotNull(actual: T?, message: String? = null, block: (T) -> R) {
asserter.assertNotNull(message, actual)
if (actual != null) {
block(actual)
}
}
/** Asserts that the [actual] value is `null`, with an optional [message]. */
public fun assertNull(actual: Any?, message: String? = null) {
asserter.assertNull(message, actual)
}
/** Marks a test as having failed if this point in the execution path is reached, with an optional [message]. */
public fun fail(message: String? = null) {
asserter.fail(message)
}
/** Asserts that given function [block] returns the given [expected] value. */
public fun expect(expected: T, block: () -> T) {
assertEquals(expected, block())
}
/** Asserts that given function [block] returns the given [expected] value and use the given [message] if it fails. */
public fun expect(expected: T, message: String?, block: () -> T) {
assertEquals(expected, block(), message)
}
@Deprecated("Use assertFails instead.", ReplaceWith("assertFails(block)"))
public fun fails(block: () -> Unit): Throwable? = assertFails(block)
/** Asserts that given function [block] fails by throwing an exception. */
public fun assertFails(block: () -> Unit): Throwable? {
var thrown: Throwable? = null
try {
block()
} catch (e: Throwable) {
thrown = e
}
if (thrown == null)
asserter.fail("Expected an exception to be thrown")
return thrown
}
/**
* Abstracts the logic for performing assertions. Specific implementations of [Asserter] can use JUnit
* or TestNG assertion facilities.
*/
public interface Asserter {
/**
* Fails the current test with the specified message.
*
* @param message the message to report.
*/
public fun fail(message: String?): Unit
/**
* Asserts that the specified value is `true`.
*
* @param lazyMessage the function to return a message to report if the assertion fails.
*/
public fun assertTrue(lazyMessage: () -> String?, actual: Boolean): Unit {
if (!actual) {
fail(lazyMessage())
}
}
/**
* Asserts that the specified value is `true`.
*
* @param message the message to report if the assertion fails.
*/
public fun assertTrue(message: String?, actual: Boolean): Unit {
assertTrue({message}, actual)
}
/**
* Asserts that the specified values are equal.
*
* @param message the message to report if the assertion fails.
*/
public fun assertEquals(message: String?, expected: Any?, actual: Any?): Unit {
assertTrue({ (message?.let { "$it. " } ?: "") + "Expected <$expected>, actual <$actual>." }, actual == expected)
}
/**
* Asserts that the specified values are not equal.
*
* @param message the message to report if the assertion fails.
*/
public fun assertNotEquals(message: String?, illegal: Any?, actual: Any?): Unit {
assertTrue({ (message?.let { "$it. " } ?: "") + "Illegal value: <$actual>." }, actual != illegal)
}
/**
* Asserts that the specified value is `null`.
*
* @param message the message to report if the assertion fails.
*/
public fun assertNull(message: String?, actual: Any?): Unit {
assertTrue({ (message?.let { "$it. " } ?: "") + "Expected value to be null, but was: <$actual>." }, actual == null)
}
/**
* Asserts that the specified value is not `null`.
*
* @param message the message to report if the assertion fails.
*/
public fun assertNotNull(message: String?, actual: Any?): Unit {
assertTrue({ (message?.let { "$it. " } ?: "") + "Expected value to be not null." }, actual != null)
}
}
