tests, signer: remove staticcheck warnings (#20364)

tests/init_test.go

@@ -289,3 +289,14 @@ func runTestFunc(runTest interface{}, t *testing.T, name string, m reflect.Value
 		m.MapIndex(reflect.ValueOf(key)),
 	})
 }
+
+func TestMatcherWhitelist(t *testing.T) {
+	t.Parallel()
+	tm := new(testMatcher)
+	tm.whitelist("invalid*")
+	tm.walk(t, rlpTestDir, func(t *testing.T, name string, test *RLPTest) {
+		if name[:len("invalidRLPTest.json")] != "invalidRLPTest.json" {
+			t.Fatalf("invalid test found: %s != invalidRLPTest.json", name)
+		}
+	})
+}