src/test/java/design/persistence/JSONPersonalDatabaseTest.java


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package design.persistence;

import static org.junit.jupiter.api.Assertions.assertEquals;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

import static org.junit.jupiter.api.Assertions.assertNotNull;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;

import design.model.Golfer;

/** Unit Tests for the JSON Personal Database Singleton
 * @author Willem Dalton
 **/
@Tag("Persistence-tier")
public class JSONPersonalDatabaseTest {
    Path tempDB;

    @BeforeEach
    void clearDB() throws IOException
    {
        tempDB = Files.createTempFile("testdb", ".json");
        Files.writeString(tempDB, "[]");
        JSONPersonalDatabase.testInstance(tempDB.toString());
    }
    
    @Test 
    void testInstance()
    {
        JSONPersonalDatabase instance = JSONPersonalDatabase.instance(); // makes new instance
        assertNotNull(instance);
        JSONPersonalDatabase instance2 = JSONPersonalDatabase.instance(); // instance already exists
        assertNotNull(instance2);
    }

    @Test
    void testAddRemove() throws IOException
    {
        JSONPersonalDatabase instance = JSONPersonalDatabase.testInstance(tempDB.toString()); // makes new instance
        Golfer testGolfer = new Golfer("Jamie Doe", "joe_cool", "12345");
        instance.addGolfer(testGolfer);
        assertEquals(testGolfer, instance.getGolfer("joe_cool"));
        instance.removeGolfer(testGolfer);
        assertEquals(null, instance.getGolfer("joe_cool"));
    }

    @Test
    void testUpdateGolfer() throws IOException
    {
        JSONPersonalDatabase instance = JSONPersonalDatabase.testInstance(tempDB.toString()); // makes new instance
        Golfer testGolfer = new Golfer("Jamie Doe", "joe_cool", "12345");
        instance.addGolfer(testGolfer);
        testGolfer.setUsername("joe_super_cool");
        instance.updateGolfer(testGolfer);
        assertEquals(testGolfer, instance.getGolfer("joe_super_cool"));
    }
}