compiler testdata: s/trait/interface

compiler/testData/diagnostics/tests/smartCasts/inference/intersectionTypes.kt

@@ -8,9 +8,9 @@ fun <T> two(u: T, <!UNUSED_PARAMETER!>v<!>: T): T = u
 
 fun <T> three(<!UNUSED_PARAMETER!>a<!>: T, <!UNUSED_PARAMETER!>b<!>: T, c: T): T = c
 
-trait A
-trait B: A
-trait C: A
+interface A
+interface B: A
+interface C: A
 
 fun test(a: A, b: B, c: C) {
     if (a is B && a is C) {

compiler/testData/diagnostics/tests/smartCasts/inference/kt4009.kt

@@ -1,9 +1,9 @@
-trait PsiElement {
+interface PsiElement {
     fun getText(): String
     fun getParent(): PsiElement
 }
 
-trait JetExpression : PsiElement
+interface JetExpression : PsiElement
 
 fun foo1(e: PsiElement) {
     var current: PsiElement? = e

compiler/testData/diagnostics/tests/smartCasts/inference/kt4403.kt

@@ -1,7 +1,7 @@
 //KT-4403 Wrong "type mismatch" on smart cast with inference
 
-trait A
-trait B : A
+interface A
+interface B : A
 
 fun <T> T.f(): T = this
 

compiler/testData/diagnostics/tests/smartCasts/inference/kt4415.kt

@@ -1,6 +1,6 @@
 //KT-4415 Class Auto-Cast Bug
 
-trait SelfJson
+interface SelfJson
 
 object A {
     fun find(<!UNUSED_PARAMETER!>clz<!>:Class<*>){  }

compiler/testData/diagnostics/tests/smartCasts/inference/smartCastOnReceiver.kt

@@ -1,5 +1,5 @@
-trait A
-trait B
+interface A
+interface B
 
 class Test {
     fun test(a: A?, b: B, list: MutableList<Pair<A, B>>) {