Special way to test binding type (JavaFX and Junit)

junit_test.md

Special way to test binding type (JavaFX and Junit)

Code of DataModel Class

The class data model is a binding type for javafx bar chart.

public static class DataModel {
    private final SimpleStringProperty title;
    private final SimpleStringProperty price;
    private final SimpleStringProperty url;
    private final SimpleStringProperty postedd;

    public DataModel(String _title, String _price, String _url, String _posted_date) {
        this.title = new SimpleStringProperty(_title);
        this.price = new SimpleStringProperty(_price);
        this.url = new SimpleStringProperty(_url);
        this.postedd = new SimpleStringProperty(_posted_date);

    }

    public String getTitle() {
        return title.get();
    }

    public void setTitle(String _title) {
        title.set(_title);
    }

    public String getPrice() {
        return price.get();
    }
    public void setPrice(String _price) {
        price.set(_price);
    }

    public String getUrl() {
        return url.get();
    }
    public void setUrl(String _url) {
        url.set(_url);
    }

    public String getPostedd() {
        return postedd.get();
    }
    public void setPostedd(String _posted_date) {
        this.postedd.set(_posted_date);
    }

}

Code of test case

package comp3111.webscraper;
import static org.junit.Assert.*;
import java.lang.reflect.Field;
import static org.hamcrest.CoreMatchers.is;
import org.junit.Test;
import javafx.beans.property.SimpleStringProperty;
import comp3111.webscraper.Controller.DataModel;

@Test
public void dataBinding_test() {
	try {
		Class progClass = data.getClass();
		Field postedd_field = DataModel.class.getDeclaredField("postedd");
		postedd_field.setAccessible(true);
		SimpleStringProperty x = (SimpleStringProperty) postedd_field.get(data);
		SimpleStringProperty src1 = new SimpleStringProperty();
		x.bind(src1);
		String expected = "01/01/2001";
		src1.set(expected);
		String actual = data.getPostedd();
		assertThat(actual,is(expected));
	} catch (SecurityException e1) {
		// TODO Auto-generated catch block
		e1.printStackTrace();
	}catch (IllegalArgumentException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (NoSuchFieldException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalAccessException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
}

References: http://www.51gjie.com/java/795.html

Using Java Reflection for private member

   @Test
    public void test_has_bar_selected() throws Exception {
    	Controller test = new Controller();
    	Controller test2 = new Controller();
    	List<Boolean> list = new ArrayList<>();
    	List<Boolean> list2 = new ArrayList<>();
    	list.add(true);
    	list2.add(false);
    	
    	Field field = test.getClass().getDeclaredField("bar_smVector");
    	field.setAccessible(true);
    	field.set(test, list);
    	
    	Field field2 = test2.getClass().getDeclaredField("bar_smVector");
    	field2.setAccessible(true);
    	field2.set(test2, list2);
    	
    	Method method = null;
    	Method method2 = null;
		method = test.getClass().getDeclaredMethod("has_bar_selected", null);
		method2 = test2.getClass().getDeclaredMethod("has_bar_selected", null);		
    	method.setAccessible(true);    	
    	method2.setAccessible(true);    	
    	Boolean result1;
    	Boolean result2;
		result1 = (Boolean) method.invoke(test, null);
		result2 = (Boolean) method.invoke(test2, null);
    	assertEquals(result1, true);
    	assertEquals(result2, false);
		
    }

References: https://www.geeksforgeeks.org/reflection-in-java/