DbPrepareRollbackCommandTest.java

package io.dropwizard.migrations;

import com.google.common.collect.ImmutableMap;
import net.jcip.annotations.NotThreadSafe;
import net.sourceforge.argparse4j.inf.Namespace;
import org.junit.Before;
import org.junit.Test;

import java.io.ByteArrayOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.PrintWriter;

import static org.assertj.core.api.Assertions.assertThat;

@NotThreadSafe
public class DbPrepareRollbackCommandTest extends AbstractMigrationTest {

    private final DbPrepareRollbackCommand<TestMigrationConfiguration> prepareRollbackCommand =
        new DbPrepareRollbackCommand<>(new TestMigrationDatabaseConfiguration(), TestMigrationConfiguration.class,
            "migrations-ddl.xml");
    private TestMigrationConfiguration conf;

    @Before
    public void setUp() throws Exception {
        final String databaseUrl = getDatabaseUrl();
        conf = createConfiguration(databaseUrl);
    }

    @Test
    public void testRun() throws Exception {
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        prepareRollbackCommand.setOutputStream(new PrintStream(baos));
        prepareRollbackCommand.run(null, new Namespace(ImmutableMap.of()), conf);
        assertThat(baos.toString(UTF_8))
            .contains("ALTER TABLE PUBLIC.persons DROP COLUMN email;")
            .contains("DROP TABLE PUBLIC.persons;");
    }

    @Test
    public void testPrepareOnlyChange() throws Exception {
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        prepareRollbackCommand.setOutputStream(new PrintStream(baos));
        prepareRollbackCommand.run(null, new Namespace(ImmutableMap.of("count", 1)), conf);
        assertThat(baos.toString(UTF_8)).contains("DROP TABLE PUBLIC.persons;");
    }

    @Test
    public void testPrintHelp() throws Exception {
        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        createSubparser(prepareRollbackCommand).printHelp(new PrintWriter(new OutputStreamWriter(out, UTF_8), true));
        assertThat(out.toString(UTF_8)).isEqualTo(String.format(
            "usage: db prepare-rollback [-h] [--migrations MIGRATIONS-FILE]%n" +
                "          [--catalog CATALOG] [--schema SCHEMA] [-c COUNT] [-i CONTEXTS]%n" +
                "          [file]%n" +
                "%n" +
                "Generate rollback DDL scripts for pending change sets.%n" +
                "%n" +
                "positional arguments:%n" +
                "  file                   application configuration file%n" +
                "%n" +
                "optional arguments:%n" +
                "  -h, --help             show this help message and exit%n" +
                "  --migrations MIGRATIONS-FILE%n" +
                "                         the file containing  the  Liquibase migrations for%n" +
                "                         the application%n" +
                "  --catalog CATALOG      Specify  the   database   catalog   (use  database%n" +
                "                         default if omitted)%n" +
                "  --schema SCHEMA        Specify the database schema  (use database default%n" +
                "                         if omitted)%n" +
                "  -c COUNT, --count COUNT%n" +
                "                         limit script to  the  specified  number of pending%n" +
                "                         change sets%n" +
                "  -i CONTEXTS, --include CONTEXTS%n" +
                "                         include change sets from the given context%n"));
    }
}