[analysis api fir] put every library into a separate KtModule in tests

analysis/analysis-internal-utils/src/org/jetbrains/kotlin/analysis/utils/errors/checks.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010-2022 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.analysis.utils.errors
+
+import kotlin.contracts.ExperimentalContracts
+import kotlin.contracts.contract
+
+@OptIn(ExperimentalContracts::class)
+public inline fun <reified T> requireIsInstance(obj: Any) {
+    contract {
+        returns() implies (obj is T)
+    }
+    require(obj is T) { "Expected ${T::class} instead of ${obj::class} for $obj" }
+}
+
+@OptIn(ExperimentalContracts::class)
+public inline fun <reified T> checkIsInstance(obj: Any) {
+    contract {
+        returns() implies (obj is T)
+    }
+    check(obj is T) { "Expected ${T::class} instead of ${obj::class} for $obj" }
+}