Do not convert text blocks when text contains carriage return

Author: timtebeek

src/main/java/org/openrewrite/java/migrate/lang/UseTextBlocks.java

@@ -106,6 +106,10 @@ public J visitBinary(J.Binary binary, ExecutionContext ctx) {
                 }
 
                 String content = contentSb.toString();
+                if (content.contains("\r")) {
+                    // Carriage returns aren't yet carried over into text blocks, which always end with a newline \n
+                    return super.visitBinary(binary, ctx);
+                }
 
                 if (!convertStringsWithoutNewlines && !containsNewLineInContent(content)) {
                     return super.visitBinary(binary, ctx);

src/test/java/org/openrewrite/java/migrate/lang/UseTextBlocksTest.java

@@ -256,6 +256,21 @@ class Test {
         );
     }
 
+    @Test
+    void preferNoChangeIfCarriageReturnInContent() {
+        rewriteRun(
+          //language=java
+          java(
+            """
+              class Test {
+                  String text = "Deliberate\\r\\n" +
+                          "carriage return";
+              }
+              """
+          )
+        );
+    }
+
     @Test
     void preferChangeIfNoNewLineInContent() {
         rewriteRun(
@@ -537,7 +552,7 @@ public static void main(String[] args) {
     @Test
     void textBlockDemo() {
         String s1 = """
-                    
+
                     =========================================================
                                                                             \s
                               Welcome to Spring Integration!                \s