'use strict';

const { expect } = require('chai');

const equal = require('assert').equal;
const fs = require('fs');
const path = require('path');
const rimraf = require('rimraf');
const knexLib = require('../../../knex');
const logger = require('../logger');
const config = require('../../knexfile');
const delay = require('../../../lib/util/delay');
const _ = require('lodash');
const testMemoryMigrations = require('./memory-migrations');

module.exports = function (knex) {
  require('rimraf').sync(path.join(__dirname, './migration'));

  before(function () {
    // make sure lock was not left from previous failed test run
    return knex.migrate.forceFreeMigrationsLock({
      directory: 'test/integration/migrate/test',
    });
  });

  describe('knex.migrate', function () {
    it('should not fail on null default for timestamp', async () => {
      try {
        await knex.schema.dropTableIfExists('null_date');

        await knex.migrate.latest({
          directory: 'test/integration/migrate/null_timestamp_default',
        });

        await knex.into('null_date').insert({
          dummy: 'cannot insert empty object',
        });

        const rows = await knex('null_date').first();
        expect(rows.deleted_at).to.equal(null);
      } finally {
        await knex.migrate.rollback({
          directory: 'test/integration/migrate/null_timestamp_default',
        });
      }
    });

    it('should not fail drop-and-recreate-column operation when using promise chain', () => {
      return knex.migrate
        .latest({
          directory: 'test/integration/migrate/drop-and-recreate',
        })
        .then(() => {
          return knex.migrate.rollback({
            directory: 'test/integration/migrate/drop-and-recreate',
          });
        });
    });

    if (knex.client.driverName === 'pg') {
      it('should not fail drop-and-recreate-column operation when using promise chain and schema', () => {
        return knex.migrate
          .latest({
            directory: 'test/integration/migrate/drop-and-recreate-with-schema',
          })
          .then(() => {
            return knex.migrate.rollback({
              directory:
                'test/integration/migrate/drop-and-recreate-with-schema',
            });
          });
      });
    }

    if (knex.client.driverName === 'sqlite3') {
      it('should not fail rename-and-drop-column with multiline sql from legacy db', async () => {
        const knexConfig = _.extend({}, config.sqlite3, {
          connection: {
            filename: __dirname + '/../../multilineCreateMaster.sqlite3',
          },
          migrations: {
            directory:
              'test/integration/migrate/rename-and-drop-column-with-multiline-sql-from-legacy-db',
          },
        });

        const db = logger(knexLib(knexConfig));

        await db.migrate.latest();
        await db.migrate.rollback();
      });
    }

    it('should not fail drop-and-recreate-column operation when using async/await', () => {
      return knex.migrate
        .latest({
          directory: 'test/integration/migrate/async-await-drop-and-recreate',
        })
        .then(() => {
          return knex.migrate.rollback({
            directory: 'test/integration/migrate/async-await-drop-and-recreate',
          });
        });
    });

    if (knex.client.driverName === 'pg') {
      it('should not fail drop-and-recreate-column operation when using async/await and schema', () => {
        return knex.migrate
          .latest({
            directory:
              'test/integration/migrate/async-await-drop-and-recreate-with-schema',
          })
          .then(() => {
            return knex.migrate.rollback({
              directory:
                'test/integration/migrate/async-await-drop-and-recreate-with-schema',
            });
          });
      });
    }

    it('should create a new migration file with the create method', function () {
      return knex.migrate.make('test').then(function (name) {
        name = path.basename(name);
        expect(name.split('_')[0]).to.have.length(14);
        expect(name.split('_')[1].split('.')[0]).to.equal('test');
      });
    });

    it('should list the current migration state with the currentVersion method', function () {
      return knex.migrate.currentVersion().then(function (version) {
        equal(version, 'none');
      });
    });

    const tables = [
      'migration_test_1',
      'migration_test_2',
      'migration_test_2_1',
    ];

    describe('knex.migrate.status', function () {
      this.timeout(process.env.KNEX_TEST_TIMEOUT || 30000);

      beforeEach(function () {
        return knex.migrate.latest({
          directory: 'test/integration/migrate/test',
        });
      });

      afterEach(function () {
        return knex.migrate.rollback({
          directory: 'test/integration/migrate/test',
        });
      });

      it('should create a migrations lock table', function () {
        return knex.schema
          .hasTable('knex_migrations_lock')
          .then(function (exists) {
            expect(exists).to.equal(true);

            return knex.schema
              .hasColumn('knex_migrations_lock', 'is_locked')
              .then(function (exists) {
                expect(exists).to.equal(true);
              });
          });
      });

      it('should return 0 if code matches DB', function () {
        return knex.migrate
          .status({ directory: 'test/integration/migrate/test' })
          .then(function (migrationLevel) {
            expect(migrationLevel).to.equal(0);
          });
      });

      it('should return a negative number if the DB is behind', function () {
        return knex.migrate
          .rollback({ directory: 'test/integration/migrate/test' })
          .then(function () {
            return knex.migrate
              .status({ directory: 'test/integration/migrate/test' })
              .then(function (migrationLevel) {
                expect(migrationLevel).to.equal(-2);
              });
          });
      });

      it('should return a positive number if the DB is ahead', function () {
        return Promise.all([
          knex('knex_migrations').returning('id').insert({
            name: 'foobar',
            batch: 5,
            migration_time: new Date(),
          }),
          knex('knex_migrations').returning('id').insert({
            name: 'foobar',
            batch: 5,
            migration_time: new Date(),
          }),
          knex('knex_migrations').returning('id').insert({
            name: 'foobarbaz',
            batch: 6,
            migration_time: new Date(),
          }),
        ]).then(([migration1, migration2, migration3]) => {
          return knex.migrate
            .status({ directory: 'test/integration/migrate/test' })
            .then(function (migrationLevel) {
              expect(migrationLevel).to.equal(3);
            })
            .then(function () {
              // Cleanup the added migrations
              if (/redshift/.test(knex.client.driverName)) {
                return knex('knex_migrations')
                  .where('name', 'like', '%foobar%')
                  .del();
              }
              return knex('knex_migrations')
                .where('id', migration1[0])
                .orWhere('id', migration2[0])
                .orWhere('id', migration3[0])
                .del();
            });
        });
      });
    });

    describe('knex.migrate.latest', function () {
      before(function () {
        return knex.migrate.latest({
          directory: 'test/integration/migrate/test',
        });
      });

      it('should remove the record in the lock table once finished', function () {
        return knex('knex_migrations_lock')
          .select('*')
          .then(function (data) {
            expect(data[0]).to.have.property('is_locked');
            expect(data[0].is_locked).to.not.be.ok;
          });
      });

      it('should throw error if the migrations are already running', function () {
        return knex('knex_migrations_lock')
          .update({ is_locked: 1 })
          .then(function () {
            return knex.migrate
              .latest({ directory: 'test/integration/migrate/test' })
              .then(function () {
                throw new Error('then should not execute');
              });
          })
          .catch(function (error) {
            expect(error).to.have.property(
              'message',
              'Migration table is already locked'
            );
            return knex('knex_migrations_lock').select('*');
          })
          .then(function (data) {
            expect(data[0].is_locked).to.equal(1);

            // Clean up lock for other tests
            return knex('knex_migrations_lock').update({ is_locked: 0 });
          });
      });

      it('should work with concurent calls to _lockMigrations', async function () {
        if (knex.client.driverName == 'sqlite3') {
          // sqlite doesn't support concurrency
          this.skip();
          return;
        }

        const migrator = knex.migrate;
        try {
          // Start two transactions and call _lockMigrations in each of them.
          // Simulate a race condition by waiting until both are started before
          // attempting to commit either one. Exactly one should succeed.
          //
          // Both orderings are legitimate, but in practice the first transaction
          // to start will be the one that succeeds in all currently supported
          // databases (CockroachDB 1.x is an example of a database where the
          // second transaction would win, but this changed in 2.0). This test
          // assumes the first transaction wins, but could be refactored to support
          // both orderings if desired.
          const trx1 = await knex.transaction();
          await migrator._lockMigrations(trx1);
          const trx2 = await knex.transaction();
          // trx1 has a pending write lock, so the second call to _lockMigrations
          // will block (unless we're on a DB that resolves the transaction in
          // the other order as mentioned above).
          // Save the promise, then wait a short time to ensure it's had time
          // to start its query and get blocked.
          const trx2Promise = migrator._lockMigrations(trx2);
          await delay(100);
          const isTrx2PromisePending = await Promise.race([
            delay(10).then(() => true),
            trx2Promise.catch(() => {}).then(() => false),
          ]);
          if (!isTrx2PromisePending) {
            throw new Error('expected trx2 to be pending');
          }
          await trx1.commit();
          // trx1 has completed and unblocked trx2, which should now fail.
          try {
            await trx2Promise;
            throw new Error('expected trx2 to fail');
          } catch (error) {
            expect(error)
              .to.have.property('message')
              .that.includes('already locked');
            await trx2.rollback();
          }
        } finally {
          // Clean up after ourselves (I'm not sure why the before() at the
          // top of this file isn't doing it, but if this test fails without
          // this call it tends to cause cascading failures).
          await migrator._freeLock();
        }
      });

      it('should report failing migration', function () {
        const migrator = knex.migrate;
        return migrator
          .latest({ directory: 'test/integration/migrate/test_with_invalid' })
          .then(function () {
            throw new Error('then should not execute');
          })
          .catch(function (error) {
            // This will fail because of the invalid migration
            expect(error)
              .to.have.property('message')
              .that.includes('unknown_table');
            expect(migrator)
              .to.have.property('_activeMigration')
              .to.have.property(
                'fileName',
                '20150109002832_invalid_migration.js'
              );
          })
          .then(function (data) {
            // Clean up lock for other tests
            // TODO: Remove this code to reproduce https://github.com/tgriesser/knex/issues/2925
            // It is only relevant for Oracle, most likely there is a bug somewhere that needs fixing
            return knex('knex_migrations_lock').update({ is_locked: 0 });
          });
      });

      it('should release lock if non-locking related error is thrown', function () {
        return knex('knex_migrations_lock')
          .select('*')
          .then(function (data) {
            expect(data[0].is_locked).to.not.be.ok;
          });
      });

      it('should run all migration files in the specified directory', function () {
        return knex('knex_migrations')
          .select('*')
          .then(function (data) {
            expect(data.length).to.equal(2);
          });
      });

      it('should run the migrations from oldest to newest', function () {
        if (knex.client.driverName === 'oracledb') {
          return knex('knex_migrations')
            .orderBy('migration_time', 'asc')
            .select('*')
            .then(function (data) {
              expect(path.basename(data[0].name)).to.equal(
                '20131019235242_migration_1.js'
              );
              expect(path.basename(data[1].name)).to.equal(
                '20131019235306_migration_2.js'
              );
            });
        } else {
          return knex('knex_migrations')
            .orderBy('id', 'asc')
            .select('*')
            .then(function (data) {
              expect(path.basename(data[0].name)).to.equal(
                '20131019235242_migration_1.js'
              );
              expect(path.basename(data[1].name)).to.equal(
                '20131019235306_migration_2.js'
              );
            });
        }
      });

      it('should create all specified tables and columns', function () {
        // Map the table names to promises that evaluate chai expectations to
        // confirm that the table exists and the 'id' and 'name' columns exist
        // within the table
        return Promise.all(
          tables.map(function (table) {
            return knex.schema.hasTable(table).then(function (exists) {
              expect(exists).to.equal(true);
              if (exists) {
                return Promise.all([
                  knex.schema.hasColumn(table, 'id').then(function (exists) {
                    expect(exists).to.equal(true);
                  }),
                  knex.schema.hasColumn(table, 'name').then(function (exists) {
                    expect(exists).to.equal(true);
                  }),
                ]);
              }
            });
          })
        );
      });
    });

    describe('knex.migrate.latest - multiple directories', () => {
      before(() => {
        return knex.migrate.latest({
          directory: [
            'test/integration/migrate/test',
            'test/integration/migrate/test2',
          ],
        });
      });

      after(() => {
        return knex.migrate.rollback({
          directory: [
            'test/integration/migrate/test',
            'test/integration/migrate/test2',
          ],
        });
      });

      it('should create tables specified in both directories', () => {
        // Map the table names to promises that evaluate chai expectations to
        // confirm that the table exists
        const expectedTables = [
          'migration_test_1',
          'migration_test_2',
          'migration_test_2_1',
          'migration_test_3',
          'migration_test_4',
          'migration_test_4_1',
        ];

        return Promise.all(
          expectedTables.map(function (table) {
            return knex.schema.hasTable(table).then(function (exists) {
              expect(exists).to.equal(true);
            });
          })
        );
      });
    });

    describe('knex.migrate.rollback', function () {
      it('should delete the most recent batch from the migration log', function () {
        return knex.migrate
          .rollback({ directory: 'test/integration/migrate/test' })
          .then(([batchNo, log]) => {
            expect(batchNo).to.equal(1);
            expect(log).to.have.length(2);
            expect(log[0]).to.contain(batchNo);
            return knex('knex_migrations')
              .select('*')
              .then(function (data) {
                expect(data.length).to.equal(0);
              });
          });
      });

      it('should drop tables as specified in the batch', function () {
        return Promise.all(
          tables.map(function (table) {
            return knex.schema.hasTable(table).then(function (exists) {
              expect(!!exists).to.equal(false);
            });
          })
        );
      });
    });

    describe('knex.migrate.rollback - all', () => {
      before(() => {
        return knex.migrate
          .latest({
            directory: ['test/integration/migrate/test'],
          })
          .then(function () {
            return knex.migrate.latest({
              directory: [
                'test/integration/migrate/test',
                'test/integration/migrate/test2',
              ],
            });
          });
      });

      it('should delete all batches from the migration log', () => {
        return knex.migrate
          .rollback(
            {
              directory: [
                'test/integration/migrate/test',
                'test/integration/migrate/test2',
              ],
            },
            true
          )
          .then(([batchNo, log]) => {
            expect(batchNo).to.equal(2);
            expect(log).to.have.length(4);
            return knex('knex_migrations')
              .select('*')
              .then(function (data) {
                expect(data.length).to.equal(0);
              });
          });
      });

      it('should drop tables as specified in the batch', () => {
        return Promise.all(
          tables.map(function (table) {
            return knex.schema.hasTable(table).then(function (exists) {
              expect(!!exists).to.equal(false);
            });
          })
        );
      });
    });

    describe('knex.migrate.rollback - all', () => {
      before(() => {
        return knex.migrate.latest({
          directory: ['test/integration/migrate/test'],
        });
      });

      it('should only rollback migrations that have been completed and in reverse chronological order', () => {
        return knex.migrate
          .rollback(
            {
              directory: [
                'test/integration/migrate/test',
                'test/integration/migrate/test2',
              ],
            },
            true
          )
          .then(([batchNo, log]) => {
            expect(batchNo).to.equal(1);
            expect(log).to.have.length(2);

            fs.readdirSync('test/integration/migrate/test')
              .reverse()
              .forEach((fileName, index) => {
                expect(fileName).to.equal(log[index]);
              });

            return knex('knex_migrations')
              .select('*')
              .then(function (data) {
                expect(data.length).to.equal(0);
              });
          });
      });

      it('should drop tables as specified in the batch', () => {
        return Promise.all(
          tables.map(function (table) {
            return knex.schema.hasTable(table).then(function (exists) {
              expect(!!exists).to.equal(false);
            });
          })
        );
      });
    });

    describe('knex.migrate.up', () => {
      afterEach(() => {
        return knex.migrate.rollback(
          { directory: 'test/integration/migrate/test' },
          true
        );
      });

      it('should only run the first migration if no migrations have run', function () {
        return knex.migrate
          .up({
            directory: 'test/integration/migrate/test',
          })
          .then(() => {
            return knex('knex_migrations')
              .select('*')
              .then(function (data) {
                expect(data).to.have.length(1);
                expect(path.basename(data[0].name)).to.equal(
                  '20131019235242_migration_1.js'
                );
              });
          });
      });

      it('should only run the next migration that has not yet run if other migrations have already run', function () {
        return knex.migrate
          .up({
            directory: 'test/integration/migrate/test',
          })
          .then(() => {
            return knex.migrate
              .up({
                directory: 'test/integration/migrate/test',
              })
              .then(() => {
                return knex('knex_migrations')
                  .select('*')
                  .then(function (data) {
                    expect(data).to.have.length(2);
                    expect(path.basename(data[0].name)).to.equal(
                      '20131019235242_migration_1.js'
                    );
                    expect(path.basename(data[1].name)).to.equal(
                      '20131019235306_migration_2.js'
                    );
                  });
              });
          });
      });

      it('should not error if all migrations have already been run', function () {
        return knex.migrate
          .latest({
            directory: 'test/integration/migrate/test',
          })
          .then(() => {
            return knex.migrate
              .up({
                directory: 'test/integration/migrate/test',
              })
              .then((data) => {
                expect(data).to.be.an('array');
              });
          });
      });
    });

    describe('knex.migrate.down', () => {
      beforeEach(() => {
        return knex.migrate.latest({
          directory: ['test/integration/migrate/test'],
        });
      });

      afterEach(() => {
        return knex.migrate.rollback(
          { directory: ['test/integration/migrate/test'] },
          true
        );
      });

      it('should only undo the last migration that was run if all migrations have run', function () {
        return knex.migrate
          .down({
            directory: ['test/integration/migrate/test'],
          })
          .then(() => {
            return knex('knex_migrations')
              .select('*')
              .then((data) => {
                expect(data).to.have.length(1);
                expect(path.basename(data[0].name)).to.equal(
                  '20131019235242_migration_1.js'
                );
              });
          });
      });

      it('should only undo the last migration that was run if there are other migrations that have not yet run', function () {
        return knex.migrate
          .down({
            directory: ['test/integration/migrate/test'],
          })
          .then(() => {
            return knex.migrate
              .down({
                directory: ['test/integration/migrate/test'],
              })
              .then(() => {
                return knex('knex_migrations')
                  .select('*')
                  .then((data) => {
                    expect(data).to.have.length(0);
                  });
              });
          });
      });

      it('should not error if all migrations have already been undone', function () {
        return knex.migrate
          .rollback({ directory: ['test/integration/migrate/test'] }, true)
          .then(() => {
            return knex.migrate
              .down({
                directory: ['test/integration/migrate/test'],
              })
              .then((data) => {
                expect(data).to.be.an('array');
              });
          });
      });
    });

    after(function () {
      rimraf.sync(path.join(__dirname, './migration'));
    });
  });

  describe('knex.migrate.latest in parallel', function () {
    afterEach(function () {
      return knex.migrate.rollback({
        directory: 'test/integration/migrate/test',
      });
    });

    if (knex.client.driverName === 'pg' || knex.client.driverName === 'mssql') {
      it('is able to run two migrations in parallel (if no implicit DDL commits)', function () {
        return Promise.all([
          knex.migrate.latest({ directory: 'test/integration/migrate/test' }),
          knex.migrate.latest({ directory: 'test/integration/migrate/test' }),
        ]).then(function () {
          return knex('knex_migrations')
            .select('*')
            .then(function (data) {
              expect(data.length).to.equal(2);
            });
        });
      });
    }

    it('is not able to run two migrations in parallel when transactions are disabled', function () {
      const migrations = [
        knex.migrate
          .latest({
            directory: 'test/integration/migrate/test',
            disableTransactions: true,
          })
          .catch(function (err) {
            return err;
          }),
        knex.migrate
          .latest({
            directory: 'test/integration/migrate/test',
            disableTransactions: true,
          })
          .catch(function (err) {
            return err;
          }),
      ];

      return Promise.all(
        migrations.map((migration) => migration.then((res) => res && res.name))
      ).then(function (res) {
        // One should fail:
        const hasLockError =
          res[0] === 'MigrationLocked' || res[1] === 'MigrationLocked';
        expect(hasLockError).to.equal(true);

        // But the other should succeed:
        return knex('knex_migrations')
          .select('*')
          .then(function (data) {
            expect(data.length).to.equal(2);
          });
      });
    });
  });

  describe('knex.migrate (transactions disabled)', function () {
    describe('knex.migrate.latest (all transactions disabled)', function () {
      before(function () {
        return knex.migrate
          .latest({
            directory: 'test/integration/migrate/test_with_invalid',
            disableTransactions: true,
          })
          .catch(function () {});
      });

      // Same test as before, but this time, because
      // transactions are off, the column gets created for all dialects always.
      it('should create column even in invalid migration', function () {
        return knex.schema
          .hasColumn('migration_test_1', 'transaction')
          .then(function (exists) {
            expect(exists).to.equal(true);
          });
      });

      after(function () {
        return knex.migrate.rollback({
          directory: 'test/integration/migrate/test_with_invalid',
        });
      });
    });

    describe('knex.migrate.latest (per-migration transaction disabled)', function () {
      before(function () {
        return knex.migrate
          .latest({
            directory:
              'test/integration/migrate/test_per_migration_trx_disabled',
          })
          .catch(function () {});
      });

      it('should run all working migration files in the specified directory', function () {
        return knex('knex_migrations')
          .select('*')
          .then(function (data) {
            expect(data.length).to.equal(1);
          });
      });

      it('should create column in invalid migration with transaction disabled', function () {
        return knex.schema
          .hasColumn('migration_test_trx_1', 'transaction')
          .then(function (exists) {
            expect(exists).to.equal(true);
          });
      });

      after(function () {
        return knex.migrate.rollback({
          directory: 'test/integration/migrate/test_per_migration_trx_disabled',
        });
      });
    });

    describe('knex.migrate.latest (per-migration transaction enabled)', function () {
      before(function () {
        return knex.migrate
          .latest({
            directory:
              'test/integration/migrate/test_per_migration_trx_enabled',
            disableTransactions: true,
          })
          .catch(function () {});
      });

      it('should run all working migration files in the specified directory', function () {
        return knex('knex_migrations')
          .select('*')
          .then(function (data) {
            expect(data.length).to.equal(1);
          });
      });

      it('should not create column for invalid migration with transaction enabled', function () {
        return knex.schema
          .hasColumn('migration_test_trx_1', 'transaction')
          .then(function (exists) {
            // MySQL / Oracle commit transactions implicit for most common
            // migration statements (e.g. CREATE TABLE, ALTER TABLE, DROP TABLE),
            // so we need to check for dialect
            if (
              knex.client.driverName === 'mysql' ||
              knex.client.driverName === 'mysql2' ||
              knex.client.driverName === 'oracledb'
            ) {
              expect(exists).to.equal(true);
            } else {
              expect(exists).to.equal(false);
            }
          });
      });

      after(function () {
        return knex.migrate.rollback({
          directory: 'test/integration/migrate/test_per_migration_trx_enabled',
        });
      });
    });

    if (knex.client.driverName === 'pg') {
      describe('knex.migrate.latest with specific changelog schema', function () {
        before(() => {
          return knex.raw(`CREATE SCHEMA IF NOT EXISTS "testschema"`);
        });
        after(() => {
          return knex.raw(`DROP SCHEMA "testschema" CASCADE`);
        });

        it('should create changelog in the correct schema without transactions', function (done) {
          knex.migrate
            .latest({
              directory: 'test/integration/migrate/test',
              disableTransactions: true,
              schemaName: 'testschema',
            })
            .then(() => {
              return knex('testschema.knex_migrations')
                .select('*')
                .then(function (data) {
                  expect(data.length).to.equal(2);
                  done();
                });
            });
        });

        it('should create changelog in the correct schema with transactions', function (done) {
          knex.migrate
            .latest({
              directory: 'test/integration/migrate/test',
              disableTransactions: false,
              schemaName: 'testschema',
            })
            .then(() => {
              return knex('testschema.knex_migrations')
                .select('*')
                .then(function (data) {
                  expect(data.length).to.equal(2);
                  done();
                });
            });
        });

        afterEach(function () {
          return knex.migrate.rollback({
            directory: 'test/integration/migrate/test',
            disableTransactions: true,
            schemaName: 'testschema',
          });
        });
      });
    }
  });

  describe('migrationSource config', function () {
    const migrationSource = {
      getMigrations() {
        return Promise.resolve(Object.keys(testMemoryMigrations).sort());
      },
      getMigrationName(migration) {
        return migration;
      },
      getMigration(migration) {
        return testMemoryMigrations[migration];
      },
    };

    before(() => {
      return knex.migrate.latest({
        migrationSource,
      });
    });

    after(() => {
      return knex.migrate.rollback({
        migrationSource,
      });
    });

    it('can accept a custom migration source', function () {
      return knex.schema
        .hasColumn('migration_source_test_1', 'name')
        .then(function (exists) {
          expect(exists).to.equal(true);
        });
    });
  });

  describe('migrationSource config as class', function () {
    const migrations = {
      migration1: {
        up(knex) {
          return knex.schema.createTable('migration_source_test_1', function (
            t
          ) {
            t.increments();
            t.string('name');
          });
        },
        down(knex) {
          return knex.schema.dropTable('migration_source_test_1');
        },
      },
    };

    class MigrationSource {
      getMigrations() {
        return Promise.resolve(Object.keys(migrations));
      }
      getMigrationName(migration) {
        return 'migration1';
      }
      getMigration(migration) {
        return migrations[migration];
      }
    }
    const migrationSource = new MigrationSource();

    before(() => {
      return knex.migrate.latest({
        migrationSource,
      });
    });

    after(() => {
      return knex.migrate.rollback({
        migrationSource,
      });
    });

    it('can accept a custom migration source', function () {
      return knex.schema
        .hasColumn('migration_source_test_1', 'name')
        .then(function (exists) {
          expect(exists).to.equal(true);
        });
    });
  });

  describe('knex.migrate.latest with custom config parameter for table name', function () {
    before(function () {
      return knex
        .withUserParams({ customTableName: 'migration_test_2_1a' })
        .migrate.latest({
          directory: 'test/integration/migrate/test',
        });
    });

    it('should create all specified tables and columns', function () {
      const tables = [
        'migration_test_1',
        'migration_test_2',
        'migration_test_2_1a',
      ];
      return Promise.all(
        tables.map(function (table) {
          return knex.schema.hasTable(table).then(function (exists) {
            expect(exists).to.equal(true);
            if (exists) {
              return Promise.all([
                knex.schema.hasColumn(table, 'id').then(function (exists) {
                  expect(exists).to.equal(true);
                }),
                knex.schema.hasColumn(table, 'name').then(function (exists) {
                  expect(exists).to.equal(true);
                }),
              ]);
            }
          });
        })
      );
    });

    it('should not create unexpected tables', function () {
      const table = 'migration_test_2_1';
      return knex.schema.hasTable(table).then(function (exists) {
        expect(exists).to.equal(false);
      });
    });

    after(function () {
      return knex
        .withUserParams({ customTableName: 'migration_test_2_1a' })
        .migrate.rollback({
          directory: 'test/integration/migrate/test',
        });
    });
  });

  describe('knex.migrate.latest with disableValidateMigrationList', function () {
    it('should not fail if there is a missing migration', async () => {
      try {
        await knex.migrate.latest({
          directory: 'test/integration/migrate/test',
        });

        await knex.migrate.latest({
          directory:
            'test/integration/migrate/test_with_missing_first_migration',
          disableMigrationsListValidation: true,
        });
      } finally {
        await knex.migrate.rollback({
          directory: 'test/integration/migrate/test',
        });
      }
    });
  });
};