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test.js
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test.js
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var assert = require("assert"),
pointOnLine = require("./index.js");
var linePlain = [
[0,0],
[1,1],
[2,1]
];
var pointPlain = [0.5,0.5];
// Test basic
assert.equal(pointOnLine(linePlain,pointPlain),true);
assert.equal(pointOnLine(linePlain,[1.5,1]),true);
// Test coincident points
assert.equal(pointOnLine(linePlain,[0,0]),true);
assert.equal(pointOnLine(linePlain,[1,1]),true);
assert.equal(pointOnLine(linePlain,[2,1]),true);
// Test outside line
assert.equal(pointOnLine(linePlain,[0,1]),false);
assert.equal(pointOnLine(linePlain,[2,2]),false);
assert.equal(pointOnLine(linePlain,[-1,-1]),false);
// Test irrelevant extra coordinates
assert.equal(pointOnLine([[0,0,"who cares?"],[1,1,"not this"]],[0.5,0.5,0.5]),true);
// Test bad inputs
assert.throws(function(){ pointOnLine("abc",[1,1]); });
assert.throws(function(){ pointOnLine("abc",[1,1]); });
assert.throws(function(){ pointOnLine([1,1],[1,1]); });
assert.throws(function(){ pointOnLine([[0,1],[1,1]],[]); });
assert.throws(function(){ pointOnLine([[0,1],[1,1]],[1]); });
assert.throws(function(){ pointOnLine([[0,1],[1,1]],[1]); });
assert.throws(function(){ pointOnLine([[0,1],[1,1]],["a","b"]); });
assert.throws(function(){ pointOnLine([[0,1],[1,1]],["a","b"]); });
assert.throws(function(){ pointOnLine([[0,1],[1,1]],[0.5,Infinity]); });
assert.throws(function(){ pointOnLine([[-Infinity,-Infinity],[Infinity,Infinity]],[0,0]); });
var lineGeometry = {
type: "LineString",
properties: {},
coordinates: linePlain
};
var lineFeature = {
type: "Feature",
properties: {},
geometry: lineGeometry
};
var pointGeometry = {
type: "Point",
properties: {},
coordinates: pointPlain
};
var pointFeature = {
type: "Feature",
properties: {},
geometry: pointGeometry
};
[pointPlain,pointGeometry,pointFeature].forEach(function(point){
[linePlain,lineGeometry,lineFeature].forEach(function(line){
//console.log(line,point);
assert.equal(pointOnLine(line,point),true);
});
});