ciip-grp8-password-manager/src/test/java/VaultTest.java

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

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.nio.charset.StandardCharsets;
import java.util.NoSuchElementException;

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

public class VaultTest {

    //Vault vlt = new Vault();

    static Vault vlt;

    @BeforeAll
    static void init() {
        vlt = new Vault();
    }

    @BeforeEach
    void reset() {
        vlt.outputS = System.out;
        vlt.inputS = System.in;
    }

    @Test
    void configure() {vlt.configure();}

    @Test
    void addCredential() {vlt.addCredential();}

    @Test
    void showCredential() {vlt.showCredential();}

    @Test
    void getAsJson() {vlt.getAsJson();}

    @Test
    void loadFromJson() {vlt.loadFromJson();}

    @Test
    void openConfigureMenu() {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        vlt.inputS = getEmptyStringInputStream();
        vlt.outputS = outputStream;
        vlt.configure();
        assertTrue(outputStream.toString().startsWith("Configure:"));
    }

    @Test
    void exitConfigurationMenu(){
        vlt.inputS = new ByteArrayInputStream("e".getBytes(StandardCharsets.UTF_8));
        vlt.configure();
        assertFalse(vlt.config);
    }

    @Test
    void doNotExitConfigAfterWrongInput() {
        vlt.inputS = new ByteArrayInputStream("__\n".getBytes(StandardCharsets.UTF_8));
        vlt.configure();
        assertTrue(vlt.config);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        vlt.inputS = getEmptyStringInputStream();
        vlt.outputS = outputStream;

        assertThrowsExactly(NoSuchElementException.class, () -> vlt.configure());
        assertTrue(outputStream.toString().startsWith("Configure:"));
    }



    private ByteArrayInputStream getEmptyStringInputStream() {
        return new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));
    }
}