KT-14032 related: if expression to elvis now handles also is and !is checks

idea/testData/intentions/branched/ifThenToElvis/inspectionData/expected.xml

@@ -103,4 +103,20 @@
     <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">If-Then foldable to '?:'</problem_class>
     <description>Replace 'if' expression with elvis expression</description>
   </problem>
+  <problem>
+    <file>notIsCheck.kt</file>
+    <line>4</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/notIsCheck.kt" />
+    <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">If-Then foldable to '?:'</problem_class>
+    <description>Replace 'if' expression with elvis expression</description>
+  </problem>
+  <problem>
+    <file>isCheck.kt</file>
+    <line>4</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/isCheck.kt" />
+    <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">If-Then foldable to '?:'</problem_class>
+    <description>Replace 'if' expression with elvis expression</description>
+  </problem>
 </problems>

idea/testData/intentions/branched/ifThenToElvis/isCheck.kt

@@ -0,0 +1,5 @@
+class My(val x: Int)
+
+fun foo(arg: Any?): My {
+    return if (<caret>arg is My) arg else My(42)
+}

idea/testData/intentions/branched/ifThenToElvis/isCheck.kt.after

@@ -0,0 +1,5 @@
+class My(val x: Int)
+
+fun foo(arg: Any?): My {
+    return arg as? My ?: My(42)
+}

idea/testData/intentions/branched/ifThenToElvis/notIsCheck.kt

@@ -0,0 +1,5 @@
+class My(val x: Int)
+
+fun foo(arg: Any?): My {
+    return if (<caret>arg !is My) My(42) else arg
+}

idea/testData/intentions/branched/ifThenToElvis/notIsCheck.kt.after

@@ -0,0 +1,5 @@
+class My(val x: Int)
+
+fun foo(arg: Any?): My {
+    return arg as? My ?: My(42)
+}