module.exports = function(knex) {

  var _ = require('lodash');

  describe('Additional', function () {

    it('should truncate a table with truncate', function() {

      return knex('test_table_two')
        .truncate()
        .testSql(function(tester) {
          tester('mysql', 'truncate `test_table_two`');
          tester('postgresql', 'truncate "test_table_two" restart identity');
          tester('sqlite3', "delete from sqlite_sequence where name = \"test_table_two\"");
        })
        .then(function() {

          return knex('test_table_two')
            .select('*')
            .then(function(resp) {
              expect(resp).to.have.length(0);
            });

        });

    });

    it('should allow raw queries directly with `knex.raw`', function() {
      var tables = {
        mysql: 'SHOW TABLES',
        postgresql: "SELECT table_name FROM information_schema.tables WHERE table_schema='public'",
        sqlite3: "SELECT name FROM sqlite_master WHERE type='table';"
      };
      return knex.raw(tables[knex.client.dialect]).testSql(function(tester) {
        tester(knex.client.dialect, tables[knex.client.dialect]);
      });
    });

    it('should allow using the primary table as a raw statement', function() {
      expect(knex(knex.raw("raw_table_name")).toQuery()).to.equal('select * from raw_table_name');
    });

    it('gets the columnInfo', function() {
      return knex('datatype_test').columnInfo().testSql(function(tester) {
        tester('mysql',
          'select * from information_schema.columns where table_name = ? and table_schema = ?',
          null, {
            "enum_value": {
              "defaultValue": null,
              "maxLength": 1,
              "nullable": true,
              "type": "enum"
            },
            "uuid": {
              "defaultValue": null,
              "maxLength": 36,
              "nullable": false,
              "type": "char"
            }
          });
        tester('postgresql', 'select * from information_schema.columns where table_name = ? and table_catalog = ?',
        null, {
          "enum_value": {
            "defaultValue": null,
            "maxLength": null,
            "nullable": true,
            "type": "text"
          },
          "uuid": {
            "defaultValue": null,
            "maxLength": null,
            "nullable": false,
            "type": "uuid"
          }
        });
        tester('sqlite3', 'PRAGMA table_info(datatype_test)', [], {
          "enum_value": {
            "defaultValue": null,
            "maxLength": null,
            "nullable": true,
            "type": "varchar"
          },
          "uuid": {
            "defaultValue": null,
            "maxLength": "36",
            "nullable": false,
            "type": "char"
          }
        });
      });
    });

    it('gets the columnInfo', function() {
          return knex('datatype_test').columnInfo('uuid').testSql(function(tester) {
            tester('mysql',
              'select * from information_schema.columns where table_name = ? and table_schema = ?',
              null, {
                "defaultValue": null,
                "maxLength": 36,
                "nullable": false,
                "type": "char"
              });
            tester('postgresql', 'select * from information_schema.columns where table_name = ? and table_catalog = ?',
            null, {
              "defaultValue": null,
              "maxLength": null,
              "nullable": false,
              "type": "uuid"
            });
            tester('sqlite3', 'PRAGMA table_info(datatype_test)', [], {
              "defaultValue": null,
              "maxLength": "36",
              "nullable": false,
              "type": "char"
            });
          });
        });

    it('should allow renaming a column', function() {
      var count, inserts = [];
      _.times(40, function() {
        inserts.push({first_name: 'Test', last_name: 'Data'});
      });
      return knex('accounts').insert(inserts).then(function() {
        return knex.count('*').from('accounts');
      }).then(function(resp) {
        count = resp['count(*)'];
        return knex.schema.table('accounts', function(t) {
          t.renameColumn('about', 'about_col');
        }).testSql(function(tester) {
          tester('mysql', ["show fields from `accounts` where field = ?"]);
          tester('postgresql', ["alter table \"accounts\" rename \"about\" to \"about_col\""]);
          tester('sqlite3', ["PRAGMA table_info(\"accounts\")"]);
        });
      }).then(function() {
        return knex.count('*').from('accounts');
      }).then(function(resp) {
        expect(resp['count(*)']).to.equal(count);
      }).then(function() {
        return knex('accounts').select('about_col');
      }).then(function() {
        return knex.schema.table('accounts', function(t) {
          t.renameColumn('about_col', 'about');
        });
      }).then(function() {
        return knex.count('*').from('accounts');
      }).then(function(resp) {
        expect(resp['count(*)']).to.equal(count);
      });
    });
  });

};