SONARJAVA-6839: Implement S9362: hashCode() and equals() should use consistent fields

java-checks-test-sources/default/src/main/files/non-compiling/checks/HashCodeMismatchedFieldsCheckSampleNonCompiling.java

@@ -0,0 +1,46 @@
+import java.util.Objects;
+
+class HashCodeMismatchedFieldsCheckSampleNonCompiling {
+
+  // "undefinedField" cannot be resolved: the field-read collector must bail out on the unknown
+  // identifier symbol instead of assuming it is unrelated state, and must not report an issue here.
+  static class UnresolvedIdentifier {
+    private final long id;
+
+    UnresolvedIdentifier(long id) {
+      this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+      return other instanceof UnresolvedIdentifier that && id == that.id;
+    }
+
+    @Override
+    public int hashCode() { // No issue - "undefinedField" cannot be resolved, so the scan bails out
+      return Objects.hash(id, undefinedField);
+    }
+  }
+
+  // A call to an unresolvable method must also make the scan bail out rather than treat it as a
+  // harmless side-effect-free helper.
+  static class UnresolvedHelperCall {
+    private final long id;
+    private final int version;
+
+    UnresolvedHelperCall(long id, int version) {
+      this.id = id;
+      this.version = version;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+      return other instanceof UnresolvedHelperCall that && id == that.id && unresolvedHelper();
+    }
+
+    @Override
+    public int hashCode() { // No issue - equals() calls an unresolved method, so the scan bails out
+      return Objects.hash(id, version);
+    }
+  }
+}