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line_test.go
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package geom
import (
"github.com/franela/goblin"
"github.com/intdxdt/math"
"github.com/intdxdt/mbr"
"testing"
)
func TestLineString(t *testing.T) {
var g = goblin.Goblin(t)
var pts = []Point{{5.6, 7.9}, {5.6, 8.9}, {6.6, 8.9}, {6.6, 7.9}, {5.6, 7.9}}
var pt_array = [][]float64{{5.6, 7.9, 0}, {5.6, 8.9, 0}, {6.6, 8.9, 0}, {6.6, 7.9, 0}, {5.6, 7.9, 0}}
var pts_closed = []Point{{5.538, 8.467}, {5.498, 8.559}, {5.858, 8.987}, {6.654, 8.638}, {6.549, 8.024}, {5.765, 8.082}, {5.538, 8.467}}
var pts_open = []Point{{5.538, 8.467}, {5.498, 8.559}, {5.858, 8.987}, {6.654, 8.638}, {6.549, 8.024}, {5.765, 8.082}}
var ln = NewLineString(Coordinates(pts))
var ln2 = NewLineString(Coordinates(pts_closed))
var ln3 = NewLineString(Coordinates(pts_open))
var ply = NewPolygon(Coordinates(pts_closed))
var cln = ln.Clone()
var pt_lnstr = NewLineStringFromPoint(pts[0])
g.Describe("Linestring", func() {
g.It("should test length", func() {
g.Assert(ln.Type().IsLineString()).IsTrue()
g.Assert(ln.Type() == GeoTypeLineString).IsTrue()
g.Assert(ln.Length() == 4.0).IsTrue()
g.Assert(pt_lnstr.Length() == 0.0).IsTrue()
g.Assert(ln.IsRing()).IsTrue()
g.Assert(math.Round(ln.Area(), 5)).Equal(1.0)
g.Assert(ln.len(ln.Coordinates.Len()-1, 0) == ln.Length()).IsTrue()
var chains = ln.MonoChains()
g.Assert(len(chains)).Equal(1)
g.Assert(ln.chainLength(&chains[0])).Equal(ln.Length())
//g.Assert(ln.chainLength(&chains[0])).Equal(ln.chainLength(&chains[1]))
//g.Assert(ln.chainLength(&chains[2])).Equal(ln.chainLength(&chains[3]))
g.Assert(cln.Length() == 4.0).IsTrue()
g.Assert(ln3.Area()).Equal(0.0)
g.Assert(ln2.Area()).Equal(ply.Area())
})
g.It("should throw if empty Coords - 1", func(done goblin.Done) {
defer func() {
r := recover()
if r != nil {
g.Assert(r != nil).Equal(true)
} else {
g.Fail("did not throw")
}
done()
}()
NewLineString(Coordinates([]Point{}))
})
g.It("should throw if empty Coords - 2", func(done goblin.Done) {
defer func() {
r := recover()
if r != nil {
g.Assert(r != nil).Equal(true)
} else {
g.Fail("did not throw")
}
done()
}()
NewLineString(Coordinates([]Point{}))
})
g.It("should be slice of array", func() {
ln.buildIndex()
g.Assert(ln.ToArray()).Eql(pt_array)
g.Assert(cln.ToArray()).Eql(pt_array)
ln.buildIndex()
g.Assert(ln.ToArray()).Eql(pt_array)
})
})
g.Describe("Linestring - Coords", func() {
g.It("should be slice of points", func() {
ln.buildIndex()
g.Assert(ln.Coordinates.Points()).Eql(pts)
g.Assert(cln.Coordinates.Points()).Eql(pts)
ln.buildIndex()
g.Assert(ln.Coordinates.Points()).Eql(pts)
})
g.It("should test Coords indexing", func() {
g.Assert(*ln.Coordinates.Pt(0)).Eql(pts[0])
g.Assert(ln.Pt(ln.LenVertices() - 1).Equals2D(&pts[len(pts)-1])).IsTrue()
g.Assert(ln.LenVertices()).Eql(len(pts))
})
g.It("should test envelope", func() {
box := mbr.CreateMBR(pts[0][X], pts[0][Y], pts[0][X], pts[0][Y])
for _, v := range pts[1:] {
box.ExpandIncludeXY(v[X], v[Y])
}
g.Assert(ln.BBox().Equals(&box)).IsTrue()
})
})
g.Describe("Linestring - WKT", func() {
g.It("should test wkt string", func() {
lnstr := "LINESTRING (5.6 7.9, 5.6 8.9, 6.6 8.9, 6.6 7.9, 5.6 7.9)"
g.Assert(ln.WKT()).Eql(lnstr)
})
})
}
func TestLineStringRelate(t *testing.T) {
var g = goblin.Goblin(t)
var coords = []Point{{0.5, 0.5}, {0.06, -0.1}, {0.26, -0.61}, {0, -1}, {-1.5, -1}, {-0.5, -0.5}}
var coords2 = []Point{{0.64, 1.72}, {1.18, 1.87}, {1.68, 1.43}, {0.54, 1.38}}
var plywkt = "POLYGON (( 0.64 1.72, 1.18 1.87, 1.68 1.43, 0.54 1.38, 0.64 1.72 ), (0.9471 1.5300, 0.9471 1.7102, 1.0653 1.7102, 1.0653 1.5300, 0.9471 1.5300 ))"
var plywktc = "POLYGON (( 0.9694190834241365 1.6351888097521738, 0.9963995357624527 1.6647388289798535, 1.013101720543315 1.6467518607543095, 1.032373472213541 1.6608844786458083, 1.0465060901050398 1.6454670773096276, 1.0278767301571547 1.6313344594181287, 1.0400821728816312 1.6152746663596074, 0.9880484433720215 1.6094931408585396, 0.9694190834241365 1.6351888097521738 ))"
var plywktd = "POLYGON (( 1.06137745847723 1.0766292071767967, 0.9394836291630517 0.8815990802741116, 1.3140301228738902 0.7752190110544651, 1.593277804575462 1.0034929095882898, 1.2453263281695353 1.185225527838519, 1.06137745847723 1.0766292071767967 ),( 1.2364613224012313 1.0832779615030246, 1.1212162474132812 1.0012766581462138, 1.2364613224012313 0.9303566119997828, 1.3472738945050298 0.9613841321888464, 1.4093289348831568 1.0300879268932013, 1.3384088887367258 1.0877104643871764, 1.2364613224012313 1.0832779615030246 ),( 1.1721900305810282 0.850571560085048, 1.1721900305810282 0.8838153317161875, 1.3517063973891816 0.8838153317161875, 1.3517063973891816 0.850571560085048, 1.1721900305810282 0.850571560085048 ))"
var plywkte = "POLYGON (( -0.2405548235983036 -0.1291889913629033, 0.3266242131459507 0.0813804713804726, 0.5032308593178143 -0.0442819499341227, 0.5747608247298315 -0.5006764018668276, 0.3368130581174044 -0.6318386766212843, 0.3979461279461264 -0.2718328209632546, 0.224735763431414 -0.1461703996486594, -0.2099882886839426 -0.292210510906162, -0.2405548235983036 -0.1291889913629033 ))"
var plywktf = "POLYGON (( -0.277913921826967 -0.5367427902210501, -0.4850871029131916 -0.6997643097643087, -0.3424432733128402 -0.8152378861074503, -0.2337622602840011 -0.7303308446786697, -0.1080998389694059 -0.8661821109647186, 0.0141663006880382 -0.7371234079929722, -0.1182886839408595 -0.5842907334211672, -0.277913921826967 -0.5367427902210501 ))"
var plywktg = "POLYGON (( 0.1161332552173457 -0.4654208754208744, 0.1161332552173457 -0.2431398008042315, 0.2824725516029848 -0.2431398008042315, 0.2824725516029848 -0.4654208754208744, 0.1161332552173457 -0.4654208754208744 ))"
var lna = NewLineString(Coordinates(coords))
var lnb = NewLineString(Coordinates(coords2))
var plya = NewPolygon(Coordinates(coords2))
var plyb = NewPolygonFromWKT(plywkt)
var plyc = NewPolygonFromWKT(plywktc)
var plyd = NewPolygonFromWKT(plywktd)
var plye = NewPolygonFromWKT(plywkte)
var plyf = NewPolygonFromWKT(plywktf)
var plyg = NewPolygonFromWKT(plywktg)
var pnt_null Point
var ln_null *LineString
var ply_null *Polygon
g.Describe("Linestring - Relate", func() {
g.It("should linestring relate", func() {
g.Assert(lna.bbox.Equals(&lna.bbox.MBR)).IsTrue()
g.Assert(lna.Intersects(pnt_null)).IsFalse()
g.Assert(lna.Geometry().Intersects(pnt_null)).IsFalse()
g.Assert(lna.Intersects(ln_null)).IsFalse()
g.Assert(lna.Intersects(ply_null)).IsFalse()
g.Assert(lna.Intersects(lnb)).IsFalse()
g.Assert(lna.Intersects(plya)).IsFalse()
g.Assert(lna.Intersects(plya)).IsFalse()
g.Assert(plya.Intersects(ply_null)).IsFalse()
g.Assert(plyb.Intersects(plyc)).IsFalse()
g.Assert(plya.Intersects(lna)).IsFalse()
g.Assert(plyb.Intersects(lna)).IsFalse()
g.Assert(plyd.Intersects(plyb)).IsFalse()
g.Assert(plyb.Intersects(plyd)).IsFalse()
g.Assert(plyd.Intersects(plyc)).IsFalse()
g.Assert(plyc.Intersects(plyd)).IsFalse()
g.Assert(plye.Intersects(plyg)).IsFalse()
g.Assert(plyg.Intersects(plye)).IsFalse()
g.Assert(lna.Intersects(plyb)).IsFalse()
g.Assert(lna.Intersects(plye)).IsTrue()
g.Assert(lna.Intersects(plye.Geometry())).IsTrue()
g.Assert(lna.Geometry().Intersects(plye)).IsTrue()
g.Assert(lna.Intersects(plyf)).IsFalse()
})
})
}