Fix flaky navigation tests by refreshing file system before find

idea/tests/org/jetbrains/kotlin/idea/decompiler/navigation/AbstractNavigateFromLibrarySourcesTest.kt

@@ -17,7 +17,9 @@ abstract class AbstractNavigateFromLibrarySourcesTest : LightCodeInsightFixtureT
     protected fun navigationElementForReferenceInLibrarySource(filePath: String, referenceText: String): PsiElement {
         val libraryOrderEntry = ModuleRootManager.getInstance(myModule!!).orderEntries.first { it is LibraryOrderEntry }
         val libSourcesRoot = libraryOrderEntry.getUrls(OrderRootType.SOURCES)[0]
-        val vf = VirtualFileManager.getInstance().findFileByUrl(libSourcesRoot + "/$filePath")!!
+        val libUrl = "$libSourcesRoot/$filePath"
+        val vf = VirtualFileManager.getInstance().refreshAndFindFileByUrl(libUrl)
+            ?: error("Can't find library: $libUrl")
         val psiFile = psiManager.findFile(vf)!!
         val indexOf = psiFile.text!!.indexOf(referenceText)
         val reference = psiFile.findReferenceAt(indexOf)

idea/tests/org/jetbrains/kotlin/test/util/ProjectStructureUtils.kt

@@ -41,7 +41,11 @@ fun PlatformTestCase.projectLibrary(
     }
 }
 
-val File.jarRoot get() = JarFileSystem.getInstance().getRootByLocal(LocalFileSystem.getInstance().findFileByIoFile(this)!!)!!
+val File.jarRoot: VirtualFile
+    get() {
+        val virtualFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(this) ?: error("Cannot find file $this")
+        return JarFileSystem.getInstance().getRootByLocal(virtualFile) ?: error("Can't find root by file $virtualFile")
+    }
 
 fun Module.addDependency(
         library: Library,