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

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

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
import static org.junit.jupiter.api.Assertions.assertTrue;

class ResourceApiTest {

    private static ResourceApi resourceApi;

    @BeforeAll
    static void init() {
        resourceApi = new ResourceApi();
    }

    @Test
    void getFileFromResourceAsStream() throws IOException {
        assertThrowsExactly(IllegalArgumentException.class,
                () -> resourceApi.getFileFromResourceAsStream("does_not_exist"));

        InputStream is = resourceApi.getFileFromResourceAsStream("german_wordlist.txt");

        BufferedReader in = new BufferedReader(new InputStreamReader(is));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine + "\n");
        }
        in.close();

        assertTrue(response.toString().contains("Alleinherrschaft"));
    }
}