wm/tests.sql

69 lines
3.8 KiB
PL/PgSQL

create schema if not exists test;
\i wm.sql
-- https://stackoverflow.com/questions/19982373/which-tools-libraries-do-you-use-to-unit-test-your-pl-pgsql
CREATE OR REPLACE FUNCTION assert_equals(expected anyelement, actual anyelement) RETURNS void AS $$
begin
if expected = actual or (expected is null and actual is null) then
--do nothing
else
raise exception 'Assertion Error. Expected <%> but was <%>', expected, actual;
end if;
end $$ LANGUAGE plpgsql;
drop table if exists figures;
create table figures (name text, way geometry);
insert into figures (name, way) values ('fig3',ST_GeomFromText('LINESTRING(0 0,12 0,13 4,20 2,20 0,32 0,33 10,38 16,43 15,44 10,44 0,60 0)'));
insert into figures (name, way) values ('fig3-1',ST_GeomFromText('LINESTRING(0 0,12 0,13 4,20 2,20 0,32 0,33 10,38 16,43 15,44 10,44 0)'));
insert into figures (name, way) values ('fig5',ST_GeomFromText('LINESTRING(0 39,19 52,27 77,26 104,41 115,49 115,65 103,65 75,53 45,63 15,91 0)'));
insert into figures (name, way) values ('inflection-1',ST_GeomFromText('LINESTRING(110 24,114 20,133 20,145 15,145 0,136 5,123 7,114 7,111 2)'));
-- DETECT BENDS
drop table if exists bends;
create table bends (name text, way geometry);
insert into bends select 'fig3', unnest(detect_bends((select way from figures where name='fig3')));
insert into bends select 'fig5', unnest(detect_bends((select way from figures where name='fig5')));
insert into bends select 'inflection-1', unnest(detect_bends((select way from figures where name='inflection-1')));
do $$
declare
vbends geometry[];
begin
select detect_bends((select way from figures where name='fig3')) into vbends;
perform assert_equals(5, array_length(vbends, 1));
perform assert_equals('LINESTRING(0 0,12 0,13 4)', st_astext(vbends[1]));
perform assert_equals('LINESTRING(12 0,13 4,20 2,20 0)', st_astext(vbends[2]));
perform assert_equals('LINESTRING(20 2,20 0,32 0,33 10)', st_astext(vbends[3]));
perform assert_equals('LINESTRING(32 0,33 10,38 16,43 15,44 10,44 0)', st_astext(vbends[4]));
perform assert_equals(4, array_length(detect_bends((select way from figures where name='fig3-1')), 1));
select detect_bends((select way from figures where name='fig5')) into vbends;
perform assert_equals(3, array_length(vbends, 1));
end $$ language plpgsql;
-- FIX BEND INFLECTIONS
drop table if exists inflections;
create table inflections (name text, way geometry);
insert into inflections select 'fig3', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='fig3'))));
insert into inflections select 'fig5', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='fig5'))));
insert into inflections select 'inflection-1', unnest(fix_gentle_inflections(detect_bends((select way from figures where name='inflection-1'))));
do $$
declare
vbends geometry[];
vinflections geometry[];
begin
-- fig5
select detect_bends((select way from figures where name='fig5')) into vbends;
select fix_gentle_inflections(vbends) into vinflections;
perform assert_equals('LINESTRING(0 39,19 52,27 77)', st_astext(vinflections[1]));
perform assert_equals('LINESTRING(19 52,27 77,26 104,41 115,49 115,65 103,65 75,53 45)', st_astext(vinflections[2]));
perform assert_equals('LINESTRING(65 75,53 45,63 15,91 0)', st_astext(vinflections[3]));
-- inflections-1, the example in fix_gentle_inflections docstring
select detect_bends((select way from figures where name='inflection-1')) into vbends;
select fix_gentle_inflections(vbends) into vinflections;
perform assert_equals(vbends[1], vinflections[1]); -- unchanged
perform assert_equals('LINESTRING(114 20,133 20,145 15,145 0,136 5,123 7,114 7)', st_astext(vinflections[2]));
perform assert_equals('LINESTRING(123 7,114 7,111 2)', st_astext(vinflections[3]));
end $$ language plpgsql;