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/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package kotlin.jdk8.collections.test
import org.junit.Test
import java.util.function.BiFunction
import kotlin.test.*
import kotlin.jdk8.collections.*
class MapTest {
@Test fun getOrDefault() {
val map = mapOf("x" to 1, "z" to null)
assertEquals(1, map.getOrDefault("x", 0))
assertEquals(0, map.getOrDefault("y", 0))
assertEquals(null, map.getOrDefault("z", 0))
assertEquals(null, map.getOrDefault("y" as CharSequence, null))
val nonNullMap = mapOf("x" to 1)
assertEquals(null, nonNullMap.getOrDefault("y" as CharSequence, null)) // should pass
assertEquals("none", nonNullMap.getOrDefault("y" as CharSequence, "none")) // should not compile
}
@Test fun forEach() {
val map = mapOf("k" to "v")
map.forEach { k, v ->
assertEquals("k", k)
assertEquals("v", v)
}
map.forEach {
assertEquals("k", it.key)
assertEquals("v", it.value)
}
}
@Test fun replaceAll() {
val map: MutableMap<String, CharSequence> = mutableMapOf("a" to "b", "c" to "d")
map.replaceAll { k, v -> k + v }
assertEquals(mapOf<String, CharSequence>("a" to "ab", "c" to "cd"), map)
val operator = BiFunction<Any, Any, String> { k, v -> k.toString() + v.toString() }
map.replaceAll(operator)
assertEquals(mapOf<String, CharSequence>("a" to "aab", "c" to "ccd"), map)
}
@Test fun putIfAbsent() {
val map = mutableMapOf(1 to "a")
assertEquals("a", map.putIfAbsent(1, "b"))
assertEquals("a", map[1])
assertEquals(null, map.putIfAbsent(2, "b"))
assertEquals("b", map[2])
}
@Test fun removeKeyValue() {
val map = mutableMapOf(1 to "a")
assertEquals(false, map.remove(1 as Number, null as Any?)) // requires import
assertEquals(true, map.remove(1, "a"))
}
@Test fun replace() {
val map = mutableMapOf(1 to "a", 2 to null)
assertTrue(map.replace(2, null, "x"))
assertEquals("x", map[2])
assertFalse(map.replace(2, null, "x"))
assertEquals("a", map.replace(1, "b"))
assertEquals(null, map.replace(3, "c"))
}
@Test fun computeIfAbsent() {
val map = mutableMapOf(2 to "x")
assertEquals("x", map.computeIfAbsent(2) { it.toString() })
assertEquals("3", map.computeIfAbsent(3) { it.toString() })
// prohibited: map.computeIfAbsent(0) { null }
val map2 = mutableMapOf(2 to "x", 3 to null)
assertEquals("x", map2.computeIfAbsent(2) { it.toString() })
assertEquals("3", map2.computeIfAbsent(3) { it.toString() })
assertEquals(null, map2.computeIfAbsent(0) { null })
assertFalse(0 in map2)
}
@Test fun computeIfPresent() {
val map = mutableMapOf(2 to "x")
assertEquals("2x", map.computeIfPresent(2) { k, v -> k.toString() + v })
assertEquals(null, map.computeIfPresent(3) { k, v -> k.toString() + v })
assertEquals(null, map.computeIfPresent(2) { _, _ -> null })
assertFalse(2 in map)
val map2 = mutableMapOf<Int, String?>(2 to "x")
assertEquals("2x", map2.computeIfPresent(2) { k, v -> k.toString() + v })
assertEquals(null, map2.computeIfPresent(3) { k, v -> k.toString() + v })
assertEquals(null, map2.computeIfPresent(2) { _, _ -> null })
assertFalse(2 in map2)
}
@Test fun compute() {
val map = mutableMapOf(2 to "x")
assertEquals("2x", map.compute(2) { k, v -> k.toString() + v })
assertEquals(null, map.compute(2) { _, _ -> null })
assertFalse { 2 in map }
assertEquals("1null", map.compute(1) { k, v -> k.toString() + v })
}
@Test fun merge() {
val map = mutableMapOf(2 to "x")
assertEquals("y", map.merge(3, "y") { _, _ -> null })
assertEquals(null, map.merge(3, "z") { old, new ->
assertEquals("y", old)
assertEquals("z", new)
null
})
assertFalse(3 in map)
// fails due to KT-12144
val map2 = mutableMapOf<Int, String?>(1 to null)
// new value must be V&Any
assertEquals("e", map2.merge(1, "e") { old, new -> (old.length + new.length).toString() ?: null })
assertEquals("3", map2.merge(1, "fg") { old, new -> (old.length + new.length).toString() ?: null })
assertEquals(null, map2.merge(1, "3") { _, _ -> null })
assertFalse(1 in map)
}
}
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