Function _check

test/jasmine/tests/scatter_test.js:610–616

(ptsIn, ptsExpected)

        it('works when far off-screen points cross the viewport', function() {
            function _check(ptsIn, ptsExpected) {
                var ptsOut = callLinePoints(ptsIn);
                expect(JSON.stringify(ptsOut)).toEqual(JSON.stringify([ptsExpected]));

                var ptsOut2 = callLinePoints(ptsIn.map(reverseXY)).map(reverseXY2);
                expect(JSON.stringify(ptsOut2)).toEqual(JSON.stringify([ptsExpected]));
            }

            // first cross the viewport horizontally/vertically
            _check([