Move contract and stress tests and make them runnable on JVM

Author: ilya-g

core/build.gradle.kts

@@ -78,6 +78,7 @@ kotlin {
         val jvmTest by getting {
             dependencies {
                 api("org.jetbrains.kotlin:kotlin-test-junit")
+                implementation("com.google.guava:guava-testlib:18.0")
             }
         }
 

kotlinx-collections-immutable/tests/src/test/kotlin/kotlinx.collections.immutable/contractTests/CollectionBehaviors.kt renamed to core/commonTest/src/contract/CollectionBehaviors.kt

@@ -19,7 +19,6 @@ package kotlinx.collections.immutable.contractTests.immutableList
 import kotlinx.collections.immutable.*
 import kotlinx.collections.immutable.contractTests.compare
 import kotlinx.collections.immutable.contractTests.listBehavior
-import org.junit.Test
 import kotlin.test.*
 
 class ImmutableListTest {

kotlinx-collections-immutable/tests/src/test/kotlin/kotlinx.collections.immutable/contractTests/ComparisonDSL.kt renamed to core/commonTest/src/contract/ComparisonDSL.kt

@@ -21,8 +21,6 @@ import kotlinx.collections.immutable.contractTests.collectionBehavior
 import kotlinx.collections.immutable.contractTests.compare
 import kotlinx.collections.immutable.contractTests.mapBehavior
 import kotlinx.collections.immutable.contractTests.setBehavior
-import org.junit.Test
-import java.util.*
 import kotlin.test.*
 
 class ImmutableHashMapTest : ImmutableMapTest() {

kotlinx-collections-immutable/tests/src/test/kotlin/kotlinx.collections.immutable/contractTests/immutableList/ImmutableListTest.kt renamed to core/commonTest/src/contract/list/ImmutableListTest.kt

@@ -19,7 +19,6 @@ package kotlinx.collections.immutable.contractTests.immutableSet
 import kotlinx.collections.immutable.*
 import kotlinx.collections.immutable.contractTests.compare
 import kotlinx.collections.immutable.contractTests.setBehavior
-import org.junit.Test
 import kotlin.test.*
 
 class ImmutableHashSetTest : ImmutableSetTestBase() {