dcos-dygraphs
Version:
dygraphs is a fast, flexible open source JavaScript charting library.
307 lines (265 loc) • 8.84 kB
JavaScript
/**
* @fileoverview Test cases for toDomCoords/toDataCoords
*
* @author danvk@google.com (Dan Vanderkam)
*/
import Dygraph from '../../src/dygraph';
import * as utils from '../../src/dygraph-utils';
import Proxy from './Proxy';
import CanvasAssertions from './CanvasAssertions';
import {assertDeepCloseTo} from './custom_asserts';
describe("to-dom-coords", function() {
cleanupAfterEach();
useProxyCanvas(utils, Proxy);
// Checks that toDomCoords and toDataCoords are inverses of one another.
var checkForInverses = function(g) {
var x_range = g.xAxisRange();
var y_range = g.yAxisRange();
for (var i = 0; i <= 10; i++) {
var x = x_range[0] + i / 10.0 * (x_range[1] - x_range[0]);
for (var j = 0; j <= 10; j++) {
var y = y_range[0] + j / 10.0 * (y_range[1] - y_range[0]);
assert.equal(x, g.toDataXCoord(g.toDomXCoord(x)));
assert.equal(y, g.toDataYCoord(g.toDomYCoord(y)));
}
}
};
it('testPlainChart', function() {
var opts = {
axes: {
x: {
drawAxis : false,
drawGrid : false
},
y: {
drawAxis : false,
drawGrid : false
}
},
rightGap: 0,
valueRange: [0, 100],
dateWindow: [0, 100],
width: 400,
height: 400,
colors: ['#ff0000'],
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [0,0], [100,100] ], opts);
assert.deepEqual([0, 100], g.toDataCoords(0, 0));
assert.deepEqual([0, 0], g.toDataCoords(0, 400));
assert.deepEqual([100, 100], g.toDataCoords(400, 0));
assert.deepEqual([100, 0], g.toDataCoords(400, 400));
checkForInverses(g);
// TODO(konigsberg): This doesn't really belong here. Move to its own test.
var htx = g.hidden_ctx_;
assert.equal(1, CanvasAssertions.numLinesDrawn(htx, '#ff0000'));
});
it('testChartWithAxes', function() {
var opts = {
axes: {
x: {
drawGrid: false,
drawAxis: true,
},
y: {
drawGrid: false,
drawAxis: true,
axisLabelWidth: 100
}
},
xAxisHeight: 50,
axisTickSize: 0,
rightGap: 0,
valueRange: [0, 100],
dateWindow: [0, 100],
width: 500,
height: 450,
colors: ['#ff0000'],
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [0,0], [100,100] ], opts);
assert.deepEqual([0, 100], g.toDataCoords(100, 0));
assert.deepEqual([0, 0], g.toDataCoords(100, 400));
assert.deepEqual([100, 100], g.toDataCoords(500, 0));
assert.deepEqual([100, 0], g.toDataCoords(500, 400));
checkForInverses(g);
});
it('testChartWithAxesAndLabels', function() {
var opts = {
axes: {
x: {
drawGrid: false,
drawAxis: true,
},
y: {
drawGrid: false,
drawAxis: true,
axisLabelWidth: 100
},
},
xAxisHeight: 50,
axisTickSize: 0,
rightGap: 0,
valueRange: [0, 100],
dateWindow: [0, 100],
width: 500,
height: 500,
colors: ['#ff0000'],
ylabel: 'This is the y-axis',
xlabel: 'This is the x-axis',
xLabelHeight: 25,
title: 'This is the title of the chart',
titleHeight: 25,
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [0,0], [100,100] ], opts);
assert.deepEqual([0, 100], g.toDataCoords(100, 25));
assert.deepEqual([0, 0], g.toDataCoords(100, 425));
assert.deepEqual([100, 100], g.toDataCoords(500, 25));
assert.deepEqual([100, 0], g.toDataCoords(500, 425));
checkForInverses(g);
});
it('testYAxisLabelWidth', function() {
var opts = {
axes: { y: { axisLabelWidth: 100 } },
axisTickSize: 0,
rightGap: 0,
valueRange: [0, 100],
dateWindow: [0, 100],
width: 500,
height: 500,
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [0,0], [100,100] ], opts);
assert.deepEqual([100, 0], g.toDomCoords(0, 100));
assert.deepEqual([500, 486], g.toDomCoords(100, 0));
g.updateOptions({
axes: { y: { axisLabelWidth: 50 }},
});
assert.deepEqual([50, 0], g.toDomCoords(0, 100));
assert.deepEqual([500, 486], g.toDomCoords(100, 0));
});
it('testAxisTickSize', function() {
var opts = {
axes: { y: { axisLabelWidth: 100 } },
axisTickSize: 0,
rightGap: 0,
valueRange: [0, 100],
dateWindow: [0, 100],
width: 500,
height: 500,
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [0,0], [100,100] ], opts);
assert.deepEqual([100, 0], g.toDomCoords(0, 100));
assert.deepEqual([500, 486], g.toDomCoords(100, 0));
g.updateOptions({ axisTickSize : 50 });
assert.deepEqual([200, 0], g.toDomCoords(0, 100));
assert.deepEqual([500, 386], g.toDomCoords(100, 0));
});
it('testChartLogarithmic_YAxis', function() {
var opts = {
rightGap: 0,
valueRange: [1, 4],
dateWindow: [0, 10],
width: 400,
height: 400,
colors: ['#ff0000'],
axes: {
x: {
drawGrid: false,
drawAxis: false
},
y: {
drawGrid: false,
drawAxis: false,
logscale: true
}
},
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [1,1], [4,4] ], opts);
var epsilon = 1e-8;
assertDeepCloseTo([0, 4], g.toDataCoords(0, 0), epsilon);
assertDeepCloseTo([0, 1], g.toDataCoords(0, 400), epsilon);
assertDeepCloseTo([10, 4], g.toDataCoords(400, 0), epsilon);
assertDeepCloseTo([10, 1], g.toDataCoords(400, 400), epsilon);
assertDeepCloseTo([10, 2], g.toDataCoords(400, 200), epsilon);
assert.deepEqual([0, 0], g.toDomCoords(0, 4));
assert.deepEqual([0, 400], g.toDomCoords(0, 1));
assert.deepEqual([400, 0], g.toDomCoords(10, 4));
assert.deepEqual([400, 400], g.toDomCoords(10, 1));
assert.deepEqual([400, 200], g.toDomCoords(10, 2));
// Verify that the margins are adjusted appropriately for yRangePad.
g.updateOptions({yRangePad: 40});
assertDeepCloseTo([0, 4], g.toDataCoords(0, 40), epsilon);
assertDeepCloseTo([0, 1], g.toDataCoords(0, 360), epsilon);
assertDeepCloseTo([10, 4], g.toDataCoords(400, 40), epsilon);
assertDeepCloseTo([10, 1], g.toDataCoords(400, 360), epsilon);
assertDeepCloseTo([10, 2], g.toDataCoords(400, 200), epsilon);
assertDeepCloseTo([0, 40], g.toDomCoords(0, 4), epsilon);
assertDeepCloseTo([0, 360], g.toDomCoords(0, 1), epsilon);
assertDeepCloseTo([400, 40], g.toDomCoords(10, 4), epsilon);
assertDeepCloseTo([400, 360], g.toDomCoords(10, 1), epsilon);
assertDeepCloseTo([400, 200], g.toDomCoords(10, 2), epsilon);
});
it('testChartLogarithmic_XAxis', function() {
var opts = {
rightGap: 0,
valueRange: [1, 1000],
dateWindow: [1, 1000],
width: 400,
height: 400,
colors: ['#ff0000'],
axes: {
x: {
drawGrid: false,
drawAxis: false,
logscale: true
},
y: {
drawGrid: false,
drawAxis: false
}
},
labels: ['X', 'Y']
}
var graph = document.getElementById("graph");
var g = new Dygraph(graph, [ [1,1], [10, 10], [100,100], [1000,1000] ], opts);
var epsilon = 1e-8;
assert.closeTo(1, g.toDataXCoord(0), epsilon);
assert.closeTo(5.623413251903489, g.toDataXCoord(100), epsilon);
assert.closeTo(31.62277660168378, g.toDataXCoord(200), epsilon);
assert.closeTo(177.8279410038921, g.toDataXCoord(300), epsilon);
assert.closeTo(1000, g.toDataXCoord(400), epsilon);
assert.closeTo(0, g.toDomXCoord(1), epsilon);
assert.closeTo(3.6036036036036037, g.toDomXCoord(10), epsilon);
assert.closeTo(39.63963963963964, g.toDomXCoord(100), epsilon);
assert.closeTo(400, g.toDomXCoord(1000), epsilon);
assert.closeTo(0, g.toPercentXCoord(1), epsilon);
assert.closeTo(0.3333333333, g.toPercentXCoord(10), epsilon);
assert.closeTo(0.6666666666, g.toPercentXCoord(100), epsilon);
assert.closeTo(1, g.toPercentXCoord(1000), epsilon);
// Now zoom in and ensure that the methods return reasonable values.
g.updateOptions({dateWindow: [ 10, 100 ]});
assert.closeTo(10, g.toDataXCoord(0), epsilon);
assert.closeTo(17.78279410038923, g.toDataXCoord(100), epsilon);
assert.closeTo(31.62277660168379, g.toDataXCoord(200), epsilon);
assert.closeTo(56.23413251903491, g.toDataXCoord(300), epsilon);
assert.closeTo(100, g.toDataXCoord(400), epsilon);
assert.closeTo(-40, g.toDomXCoord(1), epsilon);
assert.closeTo(0, g.toDomXCoord(10), epsilon);
assert.closeTo(400, g.toDomXCoord(100), epsilon);
assert.closeTo(4400, g.toDomXCoord(1000), epsilon);
assert.closeTo(-1, g.toPercentXCoord(1), epsilon);
assert.closeTo(0, g.toPercentXCoord(10), epsilon);
assert.closeTo(1, g.toPercentXCoord(100), epsilon);
assert.closeTo(2, g.toPercentXCoord(1000), epsilon);
});
});