[Test] Extract MockLibraryUtil to :compiler:tests-compiler-utils

Also provide MockLibraryUtilExt with bridges to MockLibraryUtil
  with JUnit4Assertions

compiler/test-infrastructure-utils/tests/org/jetbrains/kotlin/test/Assertions.kt

@@ -3,40 +3,9 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-@file:JvmName("KtAssert")
-
 package org.jetbrains.kotlin.test
 
 import java.io.File
-import java.util.*
-import kotlin.collections.ArrayList
-import kotlin.contracts.ExperimentalContracts
-import kotlin.contracts.contract
-
-/*
- * Those functions are needed only in this module because it has no testing framework
- *   with assertions in it's dependencies
- */
-
-internal fun fail(message: String) {
-    throw AssertionError(message)
-}
-
-@OptIn(ExperimentalContracts::class)
-internal fun assertNotNull(message: String, value: Any?) {
-    contract {
-        returns() implies (value != null)
-    }
-    if (value == null) {
-        fail(message)
-    }
-}
-
-internal fun assertTrue(message: String, value: Boolean) {
-    if (!value) {
-        fail(message)
-    }
-}
 
 abstract class Assertions {
     fun assertEqualsToFile(expectedFile: File, actual: String, sanitizer: (String) -> String = { it }) {

compiler/test-infrastructure-utils/tests/org/jetbrains/kotlin/test/KtAssert.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2020 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 org.jetbrains.kotlin.test
+
+import kotlin.contracts.ExperimentalContracts
+import kotlin.contracts.contract
+
+
+/*
+ * Those functions are needed only in modules which are not depend on any testing framework
+ */
+object KtAssert {
+    @JvmStatic
+    fun fail(message: String) {
+        throw AssertionError(message)
+    }
+
+    @JvmStatic
+    @OptIn(ExperimentalContracts::class)
+    fun assertNotNull(message: String, value: Any?) {
+        contract {
+            returns() implies (value != null)
+        }
+        if (value == null) {
+            fail(message)
+        }
+    }
+
+    @JvmStatic
+    fun assertTrue(message: String, value: Boolean) {
+        if (!value) {
+            fail(message)
+        }
+    }
+
+    @JvmStatic
+    fun <T> assertEquals(message: String, expected: T, actual: T) {
+        if (expected != actual) {
+            fail(message)
+        }
+    }
+}