test multi-line close in doc string

Author: Chase Coalwell

smithy-typescript-codegen/src/test/java/software/amazon/smithy/typescript/codegen/TypeScriptWriterTest.java

@@ -36,6 +36,17 @@ public void escapesDollarInDocStrings() {
         assertThat(result, equalTo("/**\n * " + docs + "\n */\n"));
     }
 
+    @Test
+    public void escapesMultiLineCloseInDocStrings() {
+        String docs = "This is */ valid documentation.";
+
+        TypeScriptWriter writer = new TypeScriptWriter("foo");
+        writer.writeDocs(docs);
+        String result = writer.toString();
+
+        assertThat(result, equalTo("/**\n * This is *\\/ valid documentation.\n */\n"));
+    }
+
     @Test
     public void addsFormatterForSymbols() {
         // TODO