From e1f23aeb2cf77b01a59945d0ff2b52a497efa2dc Mon Sep 17 00:00:00 2001
From: Pavan-Nambi <pavannambi999@gmail.com>
Date: Sun, 12 Oct 2025 22:23:04 +0530
Subject: [PATCH] fmt and add tests

---
 core/translate/expr.rs        |  2 +-
 testing/scalar-functions.test | 51 +++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/core/translate/expr.rs b/core/translate/expr.rs
index bcdd3f2c7..cb02e2e35 100644
--- a/core/translate/expr.rs
+++ b/core/translate/expr.rs
@@ -1187,7 +1187,7 @@ pub fn translate_expr(
                                 translate_expr_no_constant_opt(
                                     program,
                                     referenced_tables,
-                                    args.last().unwrap(), 
+                                    args.last().unwrap(),
                                     target_register,
                                     resolver,
                                     NoConstantOptReason::RegisterReuse,
diff --git a/testing/scalar-functions.test b/testing/scalar-functions.test
index 963ccc5be..30ba59b83 100755
--- a/testing/scalar-functions.test
+++ b/testing/scalar-functions.test
@@ -1023,7 +1023,58 @@ do_execsql_test sum-8 {
 } {1.2}
 
 
+# https://github.com/tursodatabase/turso/issues/3689
+do_execsql_test iif-3-args-true {
+  select iif(1 < 2, 'yes', 'no');
+} {yes}
+
+do_execsql_test iif-3-args-false {
+  select iif(1 > 2, 'yes', 'no');
+} {no}
+
+do_execsql_test iif-2-args-true {
+  select iif(1 < 2, 'yes');
+} {yes}
+
+do_execsql_test iif-2-args-false-is-null {
+  select iif(1 > 2, 'yes');
+} {}
+
+do_execsql_test iif-multi-args-finds-first-true {
+  select iif(0, 'a', 1, 'b', 2, 'c', 'default');
+} {b}
+
+do_execsql_test iif-multi-args-falls-to-else {
+  select iif(0, 'a', 0, 'b', 0, 'c', 'default');
+} {default}
+
+do_execsql_test if-alias-3-args-true {
+  select if(1 < 2, 'yes', 'no');
+} {yes}
+
+do_execsql_test if-alias-3-args-false {
+  select if(1 > 2, 'yes', 'no');
+} {no}
+
+do_execsql_test if-alias-2-args-true {
+  select if(1 < 2, 'ok');
+} {ok}
+
+do_execsql_test if-alias-multi-args-finds-first-true {
+  select if(0, 'a', 1, 'b', 'c');
+} {b}
+
+do_execsql_test if-alias-multi-args-falls-to-else {
+  select if(0, 'a', 0, 'b', 'c');
+} {c}
+
+do_execsql_test if-alias-multi-args-no-else-is-null {
+  select if(0, 'a', 0, 'b');
+} {}
+
+
 # TODO: sqlite seems not enable soundex() by default unless build it with SQLITE_SOUNDEX enabled.
 # do_execsql_test soundex-text {
 #  select soundex('Pfister'), soundex('husobee'), soundex('Tymczak'), soundex('Ashcraft'), soundex('Robert'), soundex('Rupert'), soundex('Rubin'), soundex('Kant'), soundex('Knuth'), soundex('x'), soundex('');
 # } {P236|H210|T522|A261|R163|R163|R150|K530|K530|X000|0000}
+