[Parameter Name Hints] added diagnostic

java/java-tests/testSrc/com/intellij/codeInsight/daemon/inlays/InlayParameterHintsTest.kt

@@ -88,7 +88,8 @@ class InlayAssert(private val file: PsiFile, val inlays: List<Inlay>) {
     val hintOffsets = hints.map { it.first }
     val hintNames = hints.map { it.second }
 
-    assertThat(hints.size).isEqualTo(expectedInlays.size)
+    val elements = hintOffsets.mapNotNull { file.findElementAt(it) }
+    assertThat(hints.size).isEqualTo(expectedInlays.size).withFailMessage("Element at offsets: ${elements.joinToString(", ")}")
 
     val expect = expectedInlays.map { it.substringBefore("->") to it.substringAfter("->") }
     val expectedHintNames = expect.map { it.first }
@@ -96,8 +97,7 @@ class InlayAssert(private val file: PsiFile, val inlays: List<Inlay>) {
 
     assertThat(hintNames).isEqualTo(expectedHintNames)
 
-    val wordsAfter = hintOffsets.mapNotNull { file.findElementAt(it) }.map { it.text }
-
+    val wordsAfter = elements.map { it.text }
     assertThat(wordsAfter).isEqualTo(expectedWordsAfter)
   }
 

java/java-tests/testSrc/com/intellij/codeInsight/daemon/inlays/JavaParameterNameHintsTest.kt

@@ -708,13 +708,16 @@ class Key {
     setup("""
 class Test {
   void test() {
+    xxx(100);
     check(1 + 1);
     int i=1; check(1 + 1 + 1);
   }
   void check(int isShow) {}
+  void xxx(int followTheSum) {}
 }
 """)
-    
+
+    onLineStartingWith("xxx").assertInlays("followTheSum->100")
     onLineStartingWith("check").assertInlays("isShow->1")
     onLineStartingWith("int").assertInlays("isShow->1")
   }