libraries/stdlib/test/collections/ComparisonDSL.kt

/*
 * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

package test.collections

import test.*
import kotlin.reflect.KProperty1
import kotlin.test.*

public fun <T> compare(expected: T, actual: T, block: CompareContext<T>.() -> Unit) {
    CompareContext(expected, actual).block()
}

public class CompareContext<out T>(public val expected: T, public val actual: T) {

    public fun equals(message: String = "") {
        assertEquals(expected, actual, message)
    }

    public fun <P> propertyEquals(property: KProperty1<in T, P>) {
        propertyEquals(property.name, property)
    }

    public fun <P> propertyEquals(message: String = "", getter: T.() -> P) {
        assertEquals(expected.getter(), actual.getter(), message)
    }

    public fun propertyFails(getter: T.() -> Any?) {
        assertFailEquals({ expected.getter() }, { actual.getter() })
    }

    public inline fun <reified E : Throwable> propertyFailsWith(crossinline getter: T.() -> Any?) {
        assertFailsWith<E> { expected.getter() }
        assertFailsWith<E> { actual.getter() }
    }

    public fun <P> compareProperty(getter: T.() -> P, block: CompareContext<P>.() -> Unit) {
        compare(expected.getter(), actual.getter(), block)
    }

    private fun assertFailEquals(expected: () -> Any?, actual: () -> Any?) {
        val expectedFail = assertFails(expected)
        val actualFail = assertFails(actual)
        //assertEquals(expectedFail != null, actualFail != null)
        assertTypeEquals(expectedFail, actualFail)
    }
}