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# encoding: utf-8
require "cases/helper"
require 'active_record/base'
require 'active_record/connection_adapters/postgresql_adapter'
class PostgresqlArrayTest < ActiveRecord::TestCase
class PgArray < ActiveRecord::Base
self.table_name = 'pg_arrays'
end
def setup
@connection = ActiveRecord::Base.connection
@connection.transaction do
@connection.create_table('pg_arrays') do |t|
t.string 'tags', array: true
t.integer 'ratings', array: true
end
end
@column = PgArray.columns.find { |c| c.name == 'tags' }
end
teardown do
@connection.execute 'drop table if exists pg_arrays'
end
def test_column
assert_equal :string, @column.type
assert @column.array
assert_not @column.text?
ratings_column = PgArray.columns_hash['ratings']
assert_equal :integer, ratings_column.type
assert ratings_column.array
assert_not ratings_column.number?
end
def test_change_column_with_array
@connection.add_column :pg_arrays, :snippets, :string, array: true, default: []
@connection.change_column :pg_arrays, :snippets, :text, array: true, default: "{}"
PgArray.reset_column_information
column = PgArray.columns.find { |c| c.name == 'snippets' }
assert_equal :text, column.type
assert_equal [], column.default
assert column.array
end
def test_change_column_cant_make_non_array_column_to_array
@connection.add_column :pg_arrays, :a_string, :string
assert_raises ActiveRecord::StatementInvalid do
@connection.transaction do
@connection.change_column :pg_arrays, :a_string, :string, array: true
end
end
end
def test_type_cast_array
data = '{1,2,3}'
oid_type = @column.instance_variable_get('@oid_type').subtype
# we are getting the instance variable in this test, but in the
# normal use of string_to_array, it's called from the OID::Array
# class and will have the OID instance that will provide the type
# casting
array = @column.class.string_to_array data, oid_type
assert_equal(['1', '2', '3'], array)
assert_equal(['1', '2', '3'], @column.type_cast(data))
assert_equal([], @column.type_cast('{}'))
assert_equal([nil], @column.type_cast('{NULL}'))
end
def test_type_cast_integers
x = PgArray.new(ratings: ['1', '2'])
assert x.save!
assert_equal(['1', '2'], x.ratings)
end
def test_rewrite
@connection.execute "insert into pg_arrays (tags) VALUES ('{1,2,3}')"
x = PgArray.first
x.tags = ['1','2','3','4']
assert x.save!
end
def test_select
@connection.execute "insert into pg_arrays (tags) VALUES ('{1,2,3}')"
x = PgArray.first
assert_equal(['1','2','3'], x.tags)
end
def test_multi_dimensional_with_strings
assert_cycle(:tags, [[['1'], ['2']], [['2'], ['3']]])
end
def test_with_empty_strings
assert_cycle(:tags, [ '1', '2', '', '4', '', '5' ])
end
def test_with_multi_dimensional_empty_strings
assert_cycle(:tags, [[['1', '2'], ['', '4'], ['', '5']]])
end
def test_with_arbitrary_whitespace
assert_cycle(:tags, [[['1', '2'], [' ', '4'], [' ', '5']]])
end
def test_multi_dimensional_with_integers
assert_cycle(:ratings, [[[1], [7]], [[8], [10]]])
end
def test_strings_with_quotes
assert_cycle(:tags, ['this has','some "s that need to be escaped"'])
end
def test_strings_with_commas
assert_cycle(:tags, ['this,has','many,values'])
end
def test_strings_with_array_delimiters
assert_cycle(:tags, ['{','}'])
end
def test_strings_with_null_strings
assert_cycle(:tags, ['NULL','NULL'])
end
def test_contains_nils
assert_cycle(:tags, ['1',nil,nil])
end
def test_insert_fixture
tag_values = ["val1", "val2", "val3_with_'_multiple_quote_'_chars"]
@connection.insert_fixture({"tags" => tag_values}, "pg_arrays" )
assert_equal(PgArray.last.tags, tag_values)
end
def test_attribute_for_inspect_for_array_field
record = PgArray.new { |a| a.ratings = (1..11).to_a }
assert_equal("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...]", record.attribute_for_inspect(:ratings))
end
def test_update_all
pg_array = PgArray.create! tags: ["one", "two", "three"]
PgArray.update_all tags: ["four", "five"]
assert_equal ["four", "five"], pg_array.reload.tags
PgArray.update_all tags: []
assert_equal [], pg_array.reload.tags
end
private
def assert_cycle field, array
# test creation
x = PgArray.create!(field => array)
x.reload
assert_equal(array, x.public_send(field))
# test updating
x = PgArray.create!(field => [])
x.public_send("#{field}=", array)
x.save!
x.reload
assert_equal(array, x.public_send(field))
end
end
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