Add samples for coerceIn

#KT-20357

libraries/stdlib/samples/test/samples/comparisons/comparableOps.kt

@@ -17,6 +17,7 @@
 package samples.comparisons
 
 import samples.*
+import kotlin.test.assertFailsWith
 
 class ComparableOps {
 
@@ -31,4 +32,15 @@ class ComparableOps {
         assertPrints(10.coerceAtMost(5), "5")
         assertPrints(10.coerceAtMost(20), "10")
     }
+
+    @Sample
+    fun coerceIn() {
+        assertPrints(10.coerceIn(1, 100), "10")
+        assertPrints(10.coerceIn(1..100), "10")
+        assertPrints(0.coerceIn(1, 100), "1")
+        assertPrints(500.coerceIn(1, 100), "100")
+        assertFailsWith<IllegalArgumentException> {
+            10.coerceIn(100, 0)
+        }
+    }
 }