[JS BE] Fix KT-26706: incorrect Long value in string templates

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -6306,6 +6306,11 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/number/kt2342.kt");
         }
 
+        @TestMetadata("kt26706.kt")
+        public void testKt26706() throws Exception {
+            runTest("js/js.translator/testData/box/number/kt26706.kt");
+        }
+
         @TestMetadata("longArray.kt")
         public void testLongArray() throws Exception {
             runTest("js/js.translator/testData/box/number/longArray.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/IrBoxJsTestGenerated.java

@@ -6306,6 +6306,11 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/number/kt2342.kt");
         }
 
+        @TestMetadata("kt26706.kt")
+        public void testKt26706() throws Exception {
+            runTest("js/js.translator/testData/box/number/kt26706.kt");
+        }
+
         @TestMetadata("longArray.kt")
         public void testLongArray() throws Exception {
             runTest("js/js.translator/testData/box/number/longArray.kt");

js/js.translator/src/org/jetbrains/kotlin/js/translate/expression/StringTemplateTranslator.java

@@ -113,6 +113,16 @@ public final class StringTemplateTranslator extends AbstractTranslator {
         private boolean mustCallToString(@NotNull KotlinType type) {
             Name typeName = DescriptorUtilsKt.getNameIfStandardType(type);
             //TODO: this is a hacky optimization, should use some generic approach
+
+            // Long has valueOf method which will be called instead of toString and produce different result.
+            if (KotlinBuiltIns.isAny(type) ||
+                KotlinBuiltIns.isComparable(type) ||
+                KotlinBuiltIns.isNumber(type) ||
+                KotlinBuiltIns.isLong(type)
+            ) {
+                return true;
+            }
+
             if (typeName != null && NamePredicate.STRING.test(typeName)) {
                 return false;
             }

js/js.translator/testData/box/number/kt26706.kt

@@ -0,0 +1,17 @@
+// IGNORE_BACKEND: JS_IR
+// EXPECTED_REACHABLE_NODES: 1229
+package foo
+
+fun box(): String {
+    val x = "895065487315017728"
+    if (" ${x.toLong()}" != " $x") return "FAIL 1"
+    if (" ${x.toLong() as Comparable<Long>}" != " $x") return "FAIL 2"
+    if (" ${x.toLong() as Number}" != " $x") return "FAIL 3"
+    if (" ${x.toLong() as Any}" != " $x") return "FAIL 4"
+    if (" ${x.toLong() as Long?}" != " $x") return "FAIL 5"
+    if (" ${x.toLong() as Comparable<Long>?}" != " $x") return "FAIL 6"
+    if (" ${x.toLong() as Number?}" != " $x") return "FAIL 7"
+    if (" ${x.toLong() as Any?}" != " $x") return "FAIL 8"
+
+    return "OK"
+}