IDEA-225861 Detect a case related to String transformation where result can be predicted before transformation

GitOrigin-RevId: 3448b86219bebc4914cccae89e7e46db67d81128

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantStringOperation/afterToLowerCaseIsEmpty.java

@@ -0,0 +1,8 @@
+// "Remove redundant 'toLowerCase()' call" "true"
+class X {
+  void test(String string) {
+    if (string.isEmpty()) {
+      System.out.println("Empty");
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantStringOperation/beforeToLowerCaseIsEmpty.java

@@ -0,0 +1,8 @@
+// "Remove redundant 'toLowerCase()' call" "true"
+class X {
+  void test(String string) {
+    if (string.to<caret>LowerCase().isEmpty()) {
+      System.out.println("Empty");
+    }
+  }
+}