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unit tests + "last bend" bugfix

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Motiejus Jakštys 2021-02-18 07:08:04 +02:00
parent 6660684912
commit 54703cb122
2 changed files with 24 additions and 4 deletions
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21
IV/tests.sql
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@ -1,10 +1,23 @@
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)'));
drop table if exists bends;
create table bends as (select * from detect_bends((select way from figures where name='fig3')));
--insert into figures (name, way) values ('Žeimena', (select st_linemerge(st_union(p.way)) from planet_osm_line p where p.name = 'Žeimena'))
do $$
begin
perform assert_equals(3::bigint, (select count(1) from detect_bends((select way from figures where name='fig3'))));
perform assert_equals(3::bigint, (select count(1) from detect_bends((select way from figures where name='fig3-1'))));
end $$ language plpgsql;

7
IV/wm.sql
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@ -36,5 +36,12 @@ begin
end if;
prev_sign = cur_sign;
end loop;
-- the last bend may be lost if there is no "final" inflection angle.
-- to avoid that, return the last bend if the last accumulation has >3
-- vertices.
if (select count(1) from ((select st_dumppoints(bend) as a)) b) >= 3 then
return next;
end if;
end
$$ language plpgsql;