Test Case Concepts

This time, we are going to create a test case for each method, but it is stuck from the first method.
Create a Test Case

All Normal Input Data Normal Patterns
Abnormal Input Data Abnormal Patterns All
Boundary Value If I/O element is a boundary value and a value before and after it
Multiple Elements (Boundary Value) If Input/Output Elements are List Arrays and the Item Is a Boundary Value
Special Value If I/O element is a special value (zero, null, empty string, etc.)
Multiple Elements (Number) If the input/output elements are a list array and the number is 0, 1, or n
Multiple elements (special value) If input/output elements are list arrays and the item is special value
Branch Cover All Branch Paths
Repeat exhaust loop 0 times, 1 time, normal, maximum, maximum - 1 time

The actual method to be tested is

private static final String STRING_EMPTY=";

public void addValue(String reportFieldKey, String value) {
        keyValue = new FieldKeyValuePair();

        if(reportFieldKey==null){
            keyValue.setReportFieldKey(STRING_EMPTY);
        } else {
            keyValue.setReportFieldKey(reportFieldKey);
        }

        if(value==null){
            keyValue.setValue(STRING_EMPTY);
        } else {
            keyValue.setValue(value);
        }

        recordInfo.add(keyValue);
}

Setting parameters received like this to a class called FieldKeyValuePair
I don't know how to think about this abnormal system.
When null comes in, I control it to include empty strings, so I can do a special value pattern, but I can only think of one normal system.

What else do you think of this test case?
I would appreciate it if you could let me know.