[#1161] Add a test for hidden parameter

Author: pnatashap

qulice-checkstyle/src/test/java/com/qulice/checkstyle/CheckstyleValidatorTest.java

@@ -692,6 +692,25 @@ void rejectsUppercaseAbbreviations() throws Exception {
         );
     }
 
+    @Test
+    @SuppressWarnings("unchecked")
+    void rejectsHiddenParameters() throws Exception {
+        final String file = "HiddenParameter.java";
+        final Collection<Violation> results = this.runValidation(
+                file, false
+        );
+        final String name = "HiddenFieldCheck";
+        final String message = "'test' hides a field.";
+        MatcherAssert.assertThat(
+                results,
+                Matchers.hasItems(
+                    new ViolationMatcher(
+                        message, file, "17", name
+                    )
+                )
+        );
+    }
+
     /**
      * CheckstyleValidator can allow IT as an uppercase abbreviation.
      *

qulice-checkstyle/src/test/resources/com/qulice/checkstyle/HiddenParameter.java

@@ -0,0 +1,20 @@
+/*
+ * Hello.
+ */
+package foo;
+
+/**
+ * Hidden paramater test.
+ * @since 1.0
+ */
+class HiddenParameter {
+    private final String test = "";
+
+    /**
+     * Some documentation for the function.
+     * @param test Test
+     */
+    void bar(final String test) { // error is here
+        System.out.println("Hello: " + test);
+    }
+}