[llvm] [llvm][mustache] Precommit test for StandaloneIndentation (PR #159184)

[Paul Kirth via llvm-commits]

https://github.com/ilovepi updated https://github.com/llvm/llvm-project/pull/159184

>From 5fa6844c31ccb07dd2df584ddd96195c98d324b8 Mon Sep 17 00:00:00 2001
From: Paul Kirth <paulkirth at google.com>
Date: Fri, 29 Aug 2025 22:30:51 -0700
Subject: [PATCH] [llvm][mustache] Precommit test for StandaloneIndentation

---
 llvm/unittests/Support/MustacheTest.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/llvm/unittests/Support/MustacheTest.cpp b/llvm/unittests/Support/MustacheTest.cpp
index fb8478f368783..02eaed4244cc7 100644
--- a/llvm/unittests/Support/MustacheTest.cpp
+++ b/llvm/unittests/Support/MustacheTest.cpp
@@ -991,6 +991,16 @@ TEST(MustachePartials, PaddingWhitespace) {
   EXPECT_EQ("|[]|", Out);
 }
 
+TEST(MustachePartials, StandaloneIndentation) {
+  Value D = Object{{"content", "<\n->"}};
+  auto T = Template("\\\n  {{>partial}}\n/\n");
+  T.registerPartial("partial", "|\n{{{content}}}\n|\n");
+  std::string Out;
+  raw_string_ostream OS(Out);
+  T.render(D, OS);
+  EXPECT_NE("\\\n  |\n  <\n  ->\n  |\n/\n", Out);
+}
+
 TEST(MustacheLambdas, BasicInterpolation) {
   Value D = Object{};
   auto T = Template("Hello, {{lambda}}!");