JS backend: test for KT-2901: nullable type in string template

js/js.tests/test/org/jetbrains/k2js/test/semantics/StringTest.java

@@ -86,4 +86,8 @@ public final class StringTest extends AbstractExpressionTest {
     public void testExtensionMethods() throws Exception {
         checkFooBoxIsOk();
     }
+
+    public void testNullableTypeInStringTemplate() throws Exception {
+        checkFooBoxIsOk();
+    }
 }

js/js.translator/testData/expression/string/cases/nullableTypeInStringTemplate.kt

@@ -0,0 +1,19 @@
+// KT-2901 nullable type in string template
+package foo
+
+fun box(): String {
+    var a: Int? = null
+
+    assertEquals("a: null", "a: ${a}")
+
+    a = 10
+    assertEquals("a: 10", "a: ${a}")
+
+    var s: String? = null
+    assertEquals("s: null", "s: $s")
+
+    s = "test"
+    assertEquals("s: test", "s: $s")
+
+    return "OK"
+}