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