stdlib: Introduced filterIsInstance version

without class-literal as a parameter

libraries/stdlib/test/collections/CollectionJVMTest.kt

@@ -104,4 +104,42 @@ class CollectionJVMTest {
     test fun takeReturnsFirstNElements() {
         expect(setOf(1, 2)) { sortedSetOf(1, 2, 3, 4, 5).take(2).toSet() }
     }
+
+    test fun filterIsInstanceList() {
+        val src: List<Any> = listOf(1,2,3.toDouble(), "abc", "cde")
+
+        val ints: List<Int> = src.filterIsInstance<Int>()
+        assertEquals(arrayListOf(1,2), ints)
+
+        val doubles: List<Double> = src.filterIsInstance<Double>()
+        assertEquals(arrayListOf(3.0), doubles)
+
+        val strings: List<String> = src.filterIsInstance<String>()
+        assertEquals(arrayListOf("abc", "cde"), strings)
+
+        val anys: List<Any> = src.filterIsInstance<Any>()
+        assertEquals(src.toList(), anys)
+
+        val chars: List<Char> = src.filterIsInstance<Char>()
+        assertEquals(0, chars.size())
+    }
+
+    test fun filterIsInstanceArray() {
+        val src: Array<Any> = array(1,2,3.toDouble(), "abc", "cde")
+
+        val ints: List<Int> = src.filterIsInstance<Int>()
+        assertEquals(arrayListOf(1,2), ints)
+
+        val doubles: List<Double> = src.filterIsInstance<Double>()
+        assertEquals(arrayListOf(3.0), doubles)
+
+        val strings: List<String> = src.filterIsInstance<String>()
+        assertEquals(arrayListOf("abc", "cde"), strings)
+
+        val anys: List<Any> = src.filterIsInstance<Any>()
+        assertEquals(src.toList(), anys)
+
+        val chars: List<Char> = src.filterIsInstance<Char>()
+        assertEquals(0, chars.size())
+    }
 }

libraries/stdlib/test/collections/StreamJVMTest.kt

@@ -0,0 +1,26 @@
+package test.collections
+
+import org.junit.Test as test
+import kotlin.test.assertEquals
+
+class StreamJVMTest {
+
+    test fun filterIsInstance() {
+        val src: Stream<Any> = listOf(1,2,3.toDouble(), "abc", "cde").stream()
+
+        val ints: Stream<Int> = src.filterIsInstance<Int>()
+        assertEquals(arrayListOf(1,2), ints.toArrayList())
+
+        val doubles: Stream<Double> = src.filterIsInstance<Double>()
+        assertEquals(arrayListOf(3.0), doubles.toArrayList())
+
+        val strings: Stream<String> = src.filterIsInstance<String>()
+        assertEquals(arrayListOf("abc", "cde"), strings.toArrayList())
+
+        val anys: Stream<Any> = src.filterIsInstance<Any>()
+        assertEquals(src.toList(), anys.toArrayList())
+
+        val chars: Stream<Char> = src.filterIsInstance<Char>()
+        assertEquals(0, chars.toArrayList().size())
+    }
+}