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# -*- coding: utf-8 -*- 

from datetime import datetime 

 

import pytest 

 

 

@pytest.mark.parametrize('start, end, expected', [ 

(datetime(2016, 11, 1), datetime(2016, 11, 1), []), 

( 

datetime(2016, 10, 1), datetime(2016, 12, 1), 

[ 

{'start': datetime(2016, 10, 1), 'end': datetime(2016, 11, 1)}, 

{'start': datetime(2016, 11, 1), 'end': datetime(2016, 12, 1)}, 

] 

), 

( 

datetime(2016, 11, 1), datetime(2017, 2, 1), 

[ 

{'start': datetime(2016, 11, 1), 'end': datetime(2016, 12, 1)}, 

{'start': datetime(2016, 12, 1), 'end': datetime(2017, 1, 1)}, 

{'start': datetime(2017, 1, 1), 'end': datetime(2017, 2, 1)}, 

] 

), 

]) 

def test_month_timerange(start, end, expected): 

from pgpart.rangep import month_timerange 

l = month_timerange(start, end) 

assert l == expected 

 

 

def test_generate_partitioned_table_ddl(): 

from pgpart.rangep import generate_partitioned_table_ddl 

parent_name = 'sale' 

partition_key = 'sold_at' 

month_range = [ 

{'start': datetime(2016, 11, 1), 'end': datetime(2016, 12, 1)}, 

] 

ddls = generate_partitioned_table_ddl(parent_name, partition_key, month_range) 

s = """ 

CREATE TABLE sale_201611 ( 

CHECK (sold_at >= '2016-11-01' AND sold_at < '2016-12-01') 

) INHERITS (sale);""" 

 

assert len(ddls) == 1 

assert ddls[0] == s 

 

 

def test_generate_trigger_condition(): 

from pgpart.rangep import generate_trigger_conditions 

parent_name = 'sale' 

partition_key = 'sold_at' 

month_range = [ 

{'start': datetime(2016, 11, 1), 'end': datetime(2016, 12, 1)}, 

{'start': datetime(2016, 12, 1), 'end': datetime(2017, 1, 1)}, 

] 

conditions = generate_trigger_conditions(parent_name, partition_key, month_range) 

s = """ 

IF (NEW.sold_at >= '2016-11-01' AND NEW.sold_at < '2016-12-01') THEN 

INSERT INTO sale_201611 VALUES (NEW.*); 

 

ELSIF (NEW.sold_at >= '2016-12-01' AND NEW.sold_at < '2017-01-01') THEN 

INSERT INTO sale_201612 VALUES (NEW.*);""" 

 

assert len(conditions) == 2 

assert '\n'.join(conditions) == s 

 

 

def test_generate_trigger(): 

from pgpart.rangep import generate_trigger 

parent_name = 'sale' 

partition_key = 'sold_at' 

month_range = [ 

{'start': datetime(2016, 11, 1), 'end': datetime(2016, 12, 1)}, 

{'start': datetime(2016, 12, 1), 'end': datetime(2017, 1, 1)}, 

] 

ddl = generate_trigger(parent_name, partition_key, month_range) 

s = """ 

CREATE OR REPLACE FUNCTION sale_insert_trigger() 

RETURNS TRIGGER AS $$ 

 

BEGIN 

IF (NEW.sold_at >= '2016-11-01' AND NEW.sold_at < '2016-12-01') THEN 

INSERT INTO sale_201611 VALUES (NEW.*); 

ELSIF (NEW.sold_at >= '2016-12-01' AND NEW.sold_at < '2017-01-01') THEN 

INSERT INTO sale_201612 VALUES (NEW.*); 

ELSE 

RAISE EXCEPTION 'Date out of range. Fix the sale_insert_trigger() function.'; 

END IF; 

 

RETURN NULL; 

END; 

$$ 

LANGUAGE plpgsql;""" 

 

assert ddl == s