1 files changed, 17 insertions, 3 deletions
diff --git a/test/lit/passes/string-lowering.wast b/test/lit/passes/string-lowering.wast
index c060bc8bd..de684889a 100644
--- a/test/lit/passes/string-lowering.wast
+++ b/test/lit/passes/string-lowering.wast
@@ -16,6 +16,12 @@
     (drop
       (string.const "needs\tescaping\00.'#%\"- .\r\n\\08\0C\0A\0D\09.ꙮ")
     )
+    (drop
+      (string.const "unpaired high surrogate \ED\A0\80 ")
+    )
+    (drop
+      (string.const "unpaired low surrogate \ED\BD\88 ")
+    )
   )
 )
 
@@ -24,7 +30,14 @@
 ;;
 ;; RUN: wasm-opt %s --string-lowering -all -S -o - | filecheck %s
 ;;
-;; CHECK: custom section "string.consts", size 69, contents: "[\"bar\",\"foo\",\"needs\\tescaping\\u0000.'#%\\\"- .\\r\\n\\\\08\\f\\n\\r\\t.\\ua66e\"]"
+;; If we use magic imports, only invalid strings should be present in the JSON.
+;;
+;; RUN: wasm-opt %s --string-lowering-magic-imports -all -S -o - \
+;; RUN:     | filecheck %s --check-prefix=MAGIC
+;;
+;; CHECK: custom section "string.consts", size 136, contents: "[\"bar\",\"foo\",\"needs\\tescaping\\u0000.'#%\\\"- .\\r\\n\\\\08\\f\\n\\r\\t.\\ua66e\",\"unpaired high surrogate \\ud800 \",\"unpaired low surrogate \\udf48 \"]"
+;;
+;; MAGIC: custom section "string.consts", size 68, contents: "[\"unpaired high surrogate \\ud800 \",\"unpaired low surrogate \\udf48 \"]"
 
 ;; The custom section should parse OK using JSON.parse from node.
 ;; (Note we run --remove-unused-module-elements to remove externref-using
@@ -33,5 +46,6 @@
 ;; RUN: wasm-opt %s --string-lowering --remove-unused-module-elements -all -o %t.wasm
 ;; RUN: node %S/string-lowering.js %t.wasm | filecheck %s --check-prefix=CHECK-JS
 ;;
-;; CHECK-JS: string: ["bar","foo","needs\tescaping\x00.'#%\"- .\r\n\\08\f\n\r\t.\ua66e"]
-;; CHECK-JS: JSON: ["bar","foo","needs\tescaping\x00.'#%\"- .\r\n\\08\f\n\r\t.ꙮ"]
+;; CHECK-JS: string: ["bar","foo","needs\tescaping\x00.'#%\"- .\r\n\\08\f\n\r\t.\ua66e","unpaired high surrogate \ud800 ","unpaired low surrogate \udf48 "]
+;;
+;; CHECK-JS: JSON: ["bar","foo","needs\tescaping\x00.'#%\"- .\r\n\\08\f\n\r\t.ꙮ","unpaired high surrogate \ud800 ","unpaired low surrogate \udf48 "]