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require 'active_support/test_case'
module ActiveRecord
# = Active Record Test Case
#
# Defines some test assertions to test against SQL queries.
class TestCase < ActiveSupport::TestCase #:nodoc:
def teardown
SQLCounter.clear_log
end
def assert_date_from_db(expected, actual, message = nil)
assert_equal expected.to_s, actual.to_s, message
end
def capture(stream)
stream = stream.to_s
captured_stream = Tempfile.new(stream)
stream_io = eval("$#{stream}")
origin_stream = stream_io.dup
stream_io.reopen(captured_stream)
yield
stream_io.rewind
return captured_stream.read
ensure
captured_stream.close
captured_stream.unlink
stream_io.reopen(origin_stream)
end
def capture_sql
SQLCounter.clear_log
yield
SQLCounter.log_all.dup
end
def assert_sql(*patterns_to_match)
capture_sql { yield }
ensure
failed_patterns = []
patterns_to_match.each do |pattern|
failed_patterns << pattern unless SQLCounter.log_all.any?{ |sql| pattern === sql }
end
assert failed_patterns.empty?, "Query pattern(s) #{failed_patterns.map{ |p| p.inspect }.join(', ')} not found.#{SQLCounter.log.size == 0 ? '' : "\nQueries:\n#{SQLCounter.log.join("\n")}"}"
end
def assert_queries(num = 1, options = {})
ignore_none = options.fetch(:ignore_none) { num == :any }
SQLCounter.clear_log
x = yield
the_log = ignore_none ? SQLCounter.log_all : SQLCounter.log
if num == :any
assert_operator the_log.size, :>=, 1, "1 or more queries expected, but none were executed."
else
mesg = "#{the_log.size} instead of #{num} queries were executed.#{the_log.size == 0 ? '' : "\nQueries:\n#{the_log.join("\n")}"}"
assert_equal num, the_log.size, mesg
end
x
end
def assert_no_queries(options = {}, &block)
options.reverse_merge! ignore_none: true
assert_queries(0, options, &block)
end
def assert_column(model, column_name, msg=nil)
assert has_column?(model, column_name), msg
end
def assert_no_column(model, column_name, msg=nil)
assert_not has_column?(model, column_name), msg
end
def has_column?(model, column_name)
model.reset_column_information
model.column_names.include?(column_name.to_s)
end
end
class SQLCounter
class << self
attr_accessor :ignored_sql, :log, :log_all
def clear_log; self.log = []; self.log_all = []; end
end
self.clear_log
self.ignored_sql = [/^PRAGMA/, /^SELECT currval/, /^SELECT CAST/, /^SELECT @@IDENTITY/, /^SELECT @@ROWCOUNT/, /^SAVEPOINT/, /^ROLLBACK TO SAVEPOINT/, /^RELEASE SAVEPOINT/, /^SHOW max_identifier_length/, /^BEGIN/, /^COMMIT/]
# FIXME: this needs to be refactored so specific database can add their own
# ignored SQL, or better yet, use a different notification for the queries
# instead examining the SQL content.
oracle_ignored = [/^select .*nextval/i, /^SAVEPOINT/, /^ROLLBACK TO/, /^\s*select .* from all_triggers/im, /^\s*select .* from all_constraints/im, /^\s*select .* from all_tab_cols/im]
mysql_ignored = [/^SHOW TABLES/i, /^SHOW FULL FIELDS/, /^SHOW CREATE TABLE /i, /^SHOW VARIABLES /]
postgresql_ignored = [/^\s*select\b.*\bfrom\b.*pg_namespace\b/im, /^\s*select tablename\b.*from pg_tables\b/im, /^\s*select\b.*\battname\b.*\bfrom\b.*\bpg_attribute\b/im, /^SHOW search_path/i]
sqlite3_ignored = [/^\s*SELECT name\b.*\bFROM sqlite_master/im]
[oracle_ignored, mysql_ignored, postgresql_ignored, sqlite3_ignored].each do |db_ignored_sql|
ignored_sql.concat db_ignored_sql
end
attr_reader :ignore
def initialize(ignore = Regexp.union(self.class.ignored_sql))
@ignore = ignore
end
def call(name, start, finish, message_id, values)
sql = values[:sql]
# FIXME: this seems bad. we should probably have a better way to indicate
# the query was cached
return if 'CACHE' == values[:name]
self.class.log_all << sql
self.class.log << sql unless ignore =~ sql
end
end
ActiveSupport::Notifications.subscribe('sql.active_record', SQLCounter.new)
end
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