liblwgeom/cunit/cu_misc.c

Go to the documentation of this file.

/**********************************************************************
 *
 * PostGIS - Spatial Types for PostgreSQL
 * http://postgis.net
 * Copyright 2008 Paul Ramsey
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU General Public Licence. See the COPYING file.
 *
 **********************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "CUnit/Basic.h"

#include "liblwgeom_internal.h"
#include "cu_tester.h"


static void test_misc_force_2d(void)
{
        LWGEOM *geom;
        LWGEOM *geom2d;
        char *wkt_out;

        geom = lwgeom_from_wkt("CIRCULARSTRINGM(-5 0 4,0 5 3,5 0 2,10 -5 1,15 0 0)", LW_PARSER_CHECK_NONE);
        geom2d = lwgeom_force_2d(geom);
        wkt_out = lwgeom_to_ewkt(geom2d);
        CU_ASSERT_STRING_EQUAL("CIRCULARSTRING(-5 0,0 5,5 0,10 -5,15 0)",wkt_out);
        lwgeom_free(geom);
        lwgeom_free(geom2d);
        lwfree(wkt_out);

        geom = lwgeom_from_wkt("GEOMETRYCOLLECTION(POINT(0 0 0),LINESTRING(1 1 1,2 2 2),POLYGON((0 0 1,0 1 1,1 1 1,1 0 1,0 0 1)),CURVEPOLYGON(CIRCULARSTRING(0 0 0,1 1 1,2 2 2,1 1 1,0 0 0)))", LW_PARSER_CHECK_NONE);
        geom2d = lwgeom_force_2d(geom);
        wkt_out = lwgeom_to_ewkt(geom2d);
        CU_ASSERT_STRING_EQUAL("GEOMETRYCOLLECTION(POINT(0 0),LINESTRING(1 1,2 2),POLYGON((0 0,0 1,1 1,1 0,0 0)),CURVEPOLYGON(CIRCULARSTRING(0 0,1 1,2 2,1 1,0 0)))",wkt_out);
        lwgeom_free(geom);
        lwgeom_free(geom2d);
        lwfree(wkt_out);
}

static void test_misc_simplify(void)
{
        LWGEOM *geom;
        LWGEOM *geom2d;
        char *wkt_out;

        geom = lwgeom_from_wkt("LINESTRING(0 0,0 10,0 51,50 20,30 20,7 32)", LW_PARSER_CHECK_NONE);
        geom2d = lwgeom_simplify(geom, 2, LW_FALSE);
        wkt_out = lwgeom_to_ewkt(geom2d);
        CU_ASSERT_STRING_EQUAL("LINESTRING(0 0,0 51,50 20,30 20,7 32)",wkt_out);
        lwgeom_free(geom);
        lwgeom_free(geom2d);
        lwfree(wkt_out);

        geom = lwgeom_from_wkt("MULTILINESTRING((0 0,0 10,0 51,50 20,30 20,7 32))", LW_PARSER_CHECK_NONE);
        geom2d = lwgeom_simplify(geom, 2, LW_FALSE);
        wkt_out = lwgeom_to_ewkt(geom2d);
        CU_ASSERT_STRING_EQUAL("MULTILINESTRING((0 0,0 51,50 20,30 20,7 32))",wkt_out);
        lwgeom_free(geom);
        lwgeom_free(geom2d);
        lwfree(wkt_out);
}

static void test_misc_count_vertices(void)
{
        LWGEOM *geom;
        int count;

        geom = lwgeom_from_wkt("GEOMETRYCOLLECTION(POINT(0 0),LINESTRING(0 0,1 1),POLYGON((0 0,0 1,1 0,0 0)),CIRCULARSTRING(0 0,0 1,1 1),CURVEPOLYGON(CIRCULARSTRING(0 0,0 1,1 1)))", LW_PARSER_CHECK_NONE);
        count = lwgeom_count_vertices(geom);
        CU_ASSERT_EQUAL(count,13);
        lwgeom_free(geom);

        geom = lwgeom_from_wkt("GEOMETRYCOLLECTION(CIRCULARSTRING(0 0,0 1,1 1),POINT(0 0),CURVEPOLYGON(CIRCULARSTRING(0 0,0 1,1 1,1 0,0 0)))", LW_PARSER_CHECK_NONE);
        count = lwgeom_count_vertices(geom);
        CU_ASSERT_EQUAL(count,9);
        lwgeom_free(geom);

        geom = lwgeom_from_wkt("CURVEPOLYGON((0 0,1 0,0 1,0 0),CIRCULARSTRING(0 0,1 0,1 1,1 0,0 0))", LW_PARSER_CHECK_NONE);
        count = lwgeom_count_vertices(geom);
        CU_ASSERT_EQUAL(count,9);
        lwgeom_free(geom);


        geom = lwgeom_from_wkt("POLYGON((0 0,1 0,0 1,0 0))", LW_PARSER_CHECK_NONE);
        count = lwgeom_count_vertices(geom);
        CU_ASSERT_EQUAL(count,4);
        lwgeom_free(geom);

        geom = lwgeom_from_wkt("CURVEPOLYGON((0 0,1 0,0 1,0 0),CIRCULARSTRING(0 0,1 0,1 1,1 0,0 0))", LW_PARSER_CHECK_NONE);
        count = lwgeom_count_vertices(geom);
        CU_ASSERT_EQUAL(count,9);
        lwgeom_free(geom);
}

static void test_misc_area(void)
{
        LWGEOM *geom;
        double area;

        geom = lwgeom_from_wkt("LINESTRING EMPTY", LW_PARSER_CHECK_ALL);
        area = lwgeom_area(geom);
        CU_ASSERT_DOUBLE_EQUAL(area, 0.0, 0.0001);
        lwgeom_free(geom);
}

static void test_misc_wkb(void)
{
        static char *wkb = "010A0000000200000001080000000700000000000000000000C00000000000000000000000000000F0BF000000000000F0BF00000000000000000000000000000000000000000000F03F000000000000F0BF000000000000004000000000000000000000000000000000000000000000004000000000000000C00000000000000000010200000005000000000000000000F0BF00000000000000000000000000000000000000000000E03F000000000000F03F00000000000000000000000000000000000000000000F03F000000000000F0BF0000000000000000";
        LWGEOM *geom = lwgeom_from_hexwkb(wkb, LW_PARSER_CHECK_ALL);
        char *str = lwgeom_to_wkt(geom, WKB_ISO, 8, 0);
        CU_ASSERT_STRING_EQUAL(str, "CURVEPOLYGON(CIRCULARSTRING(-2 0,-1 -1,0 0,1 -1,2 0,0 2,-2 0),(-1 0,0 0.5,1 0,0 1,-1 0))");
        lwfree(str);
        lwgeom_free(geom);

}


static void test_grid(void)
{
        gridspec grid;
        static char *wkt = "MULTIPOLYGON(((0 0, 10 0, 10 10, 0 10, 0 0)))";
        LWGEOM *geom = lwgeom_from_wkt(wkt, LW_PARSER_CHECK_ALL);
        LWGEOM *geomgrid;
        char *str;

        grid.ipx = grid.ipy = 0;
        grid.xsize = grid.ysize = 20;

        geomgrid = lwgeom_grid(geom, &grid);
        str = lwgeom_to_ewkt(geomgrid);
        CU_ASSERT_STRING_EQUAL(str, "MULTIPOLYGON EMPTY");
        lwfree(str);
        lwgeom_free(geom);
        lwgeom_free(geomgrid);
}

static void test_clone(void)
{
        static char *wkt = "GEOMETRYCOLLECTION(MULTIPOLYGON(((0 0, 10 0, 10 10, 0 10, 0 0))),POINT(1 1),LINESTRING(2 3,4 5))";
        LWGEOM *geom1 = lwgeom_from_wkt(wkt, LW_PARSER_CHECK_ALL);
        LWGEOM *geom2;

        /* Free in "backwards" order */
        geom2 = lwgeom_clone(geom1);
        lwgeom_free(geom1);
        lwgeom_free(geom2);

        /* Free in "forewards" order */
        geom1 = lwgeom_from_wkt(wkt, LW_PARSER_CHECK_ALL);
        geom2 = lwgeom_clone(geom1);
        lwgeom_free(geom2);
        lwgeom_free(geom1);
}

static void test_lwmpoint_from_lwgeom(void)
{
        /* This cast is so ugly, we only want to do it once.  And not even that. */
        LWGEOM* (*to_points)(LWGEOM*) = (LWGEOM* (*)(LWGEOM*)) &lwmpoint_from_lwgeom;

        do_fn_test(to_points, "MULTIPOLYGON (EMPTY)", "MULTIPOINT EMPTY");
        do_fn_test(to_points, "POINT (30 10)", "MULTIPOINT ((30 10))");
        do_fn_test(to_points, "LINESTRING Z (30 10 4,10 30 5,40 40 6)", "MULTIPOINT Z (30 10 4,10 30 5, 40 40 6)");
        do_fn_test(to_points, "POLYGON((35 10,45 45,15 40,10 20,35 10),(20 30,35 35,30 20,20 30))", "MULTIPOINT(35 10,45 45,15 40,10 20,35 10,20 30,35 35,30 20,20 30)");
        do_fn_test(to_points, "MULTIPOINT M (10 40 1,40 30 2,20 20 3,30 10 4)", "MULTIPOINT M (10 40 1,40 30 2,20 20 3,30 10 4)");
        do_fn_test(to_points, "COMPOUNDCURVE(CIRCULARSTRING(0 0,2 0, 2 1, 2 3, 4 3),(4 3, 4 5, 1 4, 0 0))", "MULTIPOINT(0 0, 2 0, 2 1, 2 3, 4 3, 4 3, 4 5, 1 4, 0 0)");
        do_fn_test(to_points, "TIN(((80 130,50 160,80 70,80 130)),((50 160,10 190,10 70,50 160)))", "MULTIPOINT (80 130, 50 160, 80 70, 80 130, 50 160, 10 190, 10 70, 50 160)");
}

/*
** Used by the test harness to register the tests in this file.
*/
void misc_suite_setup(void);
void misc_suite_setup(void)
{
        CU_pSuite suite = CU_add_suite("miscellaneous", NULL, NULL);
        PG_ADD_TEST(suite, test_misc_force_2d);
        PG_ADD_TEST(suite, test_misc_simplify);
        PG_ADD_TEST(suite, test_misc_count_vertices);
        PG_ADD_TEST(suite, test_misc_area);
        PG_ADD_TEST(suite, test_misc_wkb);
        PG_ADD_TEST(suite, test_grid);
        PG_ADD_TEST(suite, test_clone);
        PG_ADD_TEST(suite, test_lwmpoint_from_lwgeom);
}