Add test for smartcast

idea/idea-completion/testData/basic/common/primitiveCompletion/smartCast.kt

@@ -0,0 +1,21 @@
+interface A {
+    fun a()
+}
+
+interface B {
+    fun b()
+}
+
+interface C {
+    fun c()
+}
+
+fun take(a: A) {
+    if (a is B && a is C) {
+        a.<caret>
+    }
+}
+
+// EXIST: a
+// EXIST: b
+// EXIST: c

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JSBasicCompletionTestGenerated.java

@@ -2277,6 +2277,11 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
                 runTest("idea/idea-completion/testData/basic/common/primitiveCompletion/localVariablesAndFunctionsFromNestedScope.kt");
             }
 
+            @TestMetadata("smartCast.kt")
+            public void testSmartCast() throws Exception {
+                runTest("idea/idea-completion/testData/basic/common/primitiveCompletion/smartCast.kt");
+            }
+
             @TestMetadata("topLevelVariablesAndFunctions.kt")
             public void testTopLevelVariablesAndFunctions() throws Exception {
                 runTest("idea/idea-completion/testData/basic/common/primitiveCompletion/topLevelVariablesAndFunctions.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JvmBasicCompletionTestGenerated.java

@@ -2277,6 +2277,11 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
                 runTest("idea/idea-completion/testData/basic/common/primitiveCompletion/localVariablesAndFunctionsFromNestedScope.kt");
             }
 
+            @TestMetadata("smartCast.kt")
+            public void testSmartCast() throws Exception {
+                runTest("idea/idea-completion/testData/basic/common/primitiveCompletion/smartCast.kt");
+            }
+
             @TestMetadata("topLevelVariablesAndFunctions.kt")
             public void testTopLevelVariablesAndFunctions() throws Exception {
                 runTest("idea/idea-completion/testData/basic/common/primitiveCompletion/topLevelVariablesAndFunctions.kt");