Inspection: do not report anything with manual INFORMATION level offline

So #KT-20369 Fixed
So #KT-20333 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/inspections/AbstractKotlinInspection.kt

@@ -18,6 +18,8 @@ package org.jetbrains.kotlin.idea.inspections
 
 import com.intellij.codeHighlighting.HighlightDisplayLevel
 import com.intellij.codeInspection.*
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.util.TextRange
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.asJava.unwrapped
 import org.jetbrains.kotlin.caches.resolve.KotlinCacheService
@@ -45,6 +47,30 @@ abstract class AbstractKotlinInspection: LocalInspectionTool(), CustomSuppressab
     }
 
     protected open val suppressionKey: String get() = this.shortName.removePrefix("Kotlin")
+
+    protected fun ProblemsHolder.registerProblemWithoutOfflineInformation(
+            element: PsiElement,
+            description: String,
+            isOnTheFly: Boolean,
+            highlightType: ProblemHighlightType,
+            vararg fixes: LocalQuickFix
+    ) {
+        registerProblemWithoutOfflineInformation(element, description, isOnTheFly, highlightType, null, *fixes)
+    }
+
+    protected fun ProblemsHolder.registerProblemWithoutOfflineInformation(
+            element: PsiElement,
+            description: String,
+            isOnTheFly: Boolean,
+            highlightType: ProblemHighlightType,
+            range: TextRange?,
+            vararg fixes: LocalQuickFix
+    ) {
+        if (!ApplicationManager.getApplication().isUnitTestMode &&
+            !isOnTheFly && highlightType == ProblemHighlightType.INFORMATION) return
+        val problemDescriptor = manager.createProblemDescriptor(element, range, description, highlightType, isOnTheFly, *fixes)
+        registerProblem(problemDescriptor)
+    }
 }
 
 private fun toSeverity(highlightDisplayLevel: HighlightDisplayLevel): Severity  {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/inspections/IntentionBasedInspection.kt

@@ -123,8 +123,14 @@ abstract class IntentionBasedInspection<TElement : PsiElement>(
                     val allFixes = fixes ?: SmartList<LocalQuickFix>()
                     additionalFixes(targetElement)?.let { allFixes.addAll(it) }
                     if (!allFixes.isEmpty()) {
-                        holder.registerProblem(targetElement, problemText ?: allFixes.first().name,
-                                               problemHighlightType(targetElement), range, *allFixes.toTypedArray())
+                        holder.registerProblemWithoutOfflineInformation(
+                                targetElement,
+                                problemText ?: allFixes.first().name,
+                                isOnTheFly,
+                                problemHighlightType(targetElement),
+                                range,
+                                *allFixes.toTypedArray()
+                        )
                     }
                 }
             }

idea/src/org/jetbrains/kotlin/idea/inspections/LiftReturnOrAssignmentInspection.kt

@@ -48,9 +48,10 @@ class LiftReturnOrAssignmentInspection : AbstractKotlinInspection() {
                     }
                     val assignmentNumber = BranchedFoldingUtils.getFoldableAssignmentNumber(expression)
                     if (assignmentNumber > 0) {
-                        holder.registerProblem(
+                        holder.registerProblemWithoutOfflineInformation(
                                 keyword,
                                 "Assignment can be lifted out of '${keyword.text}'",
+                                isOnTheFly,
                                 if (assignmentNumber > 1) ProblemHighlightType.GENERIC_ERROR_OR_WARNING
                                 else ProblemHighlightType.INFORMATION,
                                 LiftAssignmentOutFix(keyword.text)

idea/src/org/jetbrains/kotlin/idea/inspections/NullableBooleanElvisInspection.kt

@@ -55,10 +55,13 @@ class NullableBooleanElvisInspection : AbstractKotlinInspection(), CleanupLocalI
                         else
                             INFORMATION to "can"
 
-                        holder.registerProblem(expression,
-                                               "Equality check $verb be used instead of elvis for nullable boolean check",
-                                               highlightType,
-                                               ReplaceWithEqualityCheckFix())
+                        holder.registerProblemWithoutOfflineInformation(
+                                expression,
+                                "Equality check $verb be used instead of elvis for nullable boolean check",
+                                isOnTheFly,
+                                highlightType,
+                                ReplaceWithEqualityCheckFix()
+                        )
                     }
                 }
             }

idea/src/org/jetbrains/kotlin/idea/inspections/UseExpressionBodyInspection.kt

@@ -74,15 +74,14 @@ class UseExpressionBodyInspection(private val convertEmptyToUnit: Boolean) : Abs
                     declaration as? KtDeclarationWithBody ?: return
                     val (toHighlight, suffix, highlightType) = statusFor(declaration) ?: return
 
-                    val problemDescriptor = holder.manager.createProblemDescriptor(
+                    holder.registerProblemWithoutOfflineInformation(
                             declaration,
-                            toHighlight?.textRange?.shiftRight(-declaration.startOffset),
                             "Use expression body instead of $suffix",
-                            highlightType,
                             isOnTheFly,
+                            highlightType,
+                            toHighlight?.textRange?.shiftRight(-declaration.startOffset),
                             ConvertToExpressionBodyFix()
                     )
-                    holder.registerProblem(problemDescriptor)
                 }
             }