gecko-dev/devtools/client/shared/test/browser_graphs-10c.js

"use strict";

// Tests that graphs properly handle resizing.

const TEST_DATA = [
  { delta: 112, value: 48 },
  { delta: 213, value: 59 },
  { delta: 313, value: 60 },
  { delta: 413, value: 59 },
  { delta: 530, value: 59 },
  { delta: 646, value: 58 },
  { delta: 747, value: 60 },
  { delta: 863, value: 48 },
  { delta: 980, value: 37 },
  { delta: 1097, value: 30 },
  { delta: 1213, value: 29 },
  { delta: 1330, value: 23 },
  { delta: 1430, value: 10 },
  { delta: 1534, value: 17 },
  { delta: 1645, value: 20 },
  { delta: 1746, value: 22 },
  { delta: 1846, value: 39 },
  { delta: 1963, value: 26 },
  { delta: 2080, value: 27 },
  { delta: 2197, value: 35 },
  { delta: 2312, value: 47 },
  { delta: 2412, value: 53 },
  { delta: 2514, value: 60 },
  { delta: 2630, value: 37 },
  { delta: 2730, value: 36 },
  { delta: 2830, value: 37 },
  { delta: 2946, value: 36 },
  { delta: 3046, value: 40 },
  { delta: 3163, value: 47 },
  { delta: 3280, value: 41 },
  { delta: 3380, value: 35 },
  { delta: 3480, value: 27 },
  { delta: 3580, value: 39 },
  { delta: 3680, value: 42 },
  { delta: 3780, value: 49 },
  { delta: 3880, value: 55 },
  { delta: 3980, value: 60 },
  { delta: 4080, value: 60 },
  { delta: 4180, value: 60 },
];
const LineGraphWidget = require("devtools/client/shared/widgets/LineGraphWidget");

add_task(async function() {
  await addTab("about:blank");
  await performTest();
  gBrowser.removeCurrentTab();
});

async function performTest() {
  const [host, , doc] = await createHost("window");
  doc.body.setAttribute(
    "style",
    "position: fixed; width: 100%; height: 100%; margin: 0;"
  );

  const graph = new LineGraphWidget(doc.body, "fps");
  await graph.once("ready");

  let refreshCount = 0;
  graph.on("refresh", () => refreshCount++);

  await testGraph(host, graph);

  is(refreshCount, 2, "The graph should've been refreshed 2 times.");

  await graph.destroy();
  host.destroy();
}

async function testGraph(host, graph) {
  graph.setData(TEST_DATA);

  host._window.resizeTo(500, 500);
  await graph.once("refresh");
  const oldBounds = host.frame.getBoundingClientRect();

  is(
    graph._width,
    oldBounds.width * window.devicePixelRatio,
    "The window was properly resized (1)."
  );
  is(
    graph._height,
    oldBounds.height * window.devicePixelRatio,
    "The window was properly resized (1)."
  );

  dragStart(graph, 100);
  dragStop(graph, 400);

  is(
    graph.getSelection().start,
    100,
    "The current selection start value is correct (1)."
  );
  is(
    graph.getSelection().end,
    400,
    "The current selection end value is correct (1)."
  );

  info("Making sure the selection updates when the window is resized");

  host._window.resizeTo(250, 250);
  await graph.once("refresh");
  const newBounds = host.frame.getBoundingClientRect();

  is(
    graph._width,
    newBounds.width * window.devicePixelRatio,
    "The window was properly resized (2)."
  );
  is(
    graph._height,
    newBounds.height * window.devicePixelRatio,
    "The window was properly resized (2)."
  );

  const ratio = oldBounds.width / newBounds.width;
  info("The window resize ratio is: " + ratio);

  is(
    graph.getSelection().start,
    Math.round(100 / ratio),
    "The current selection start value is correct (2)."
  );
  is(
    graph.getSelection().end,
    Math.round(400 / ratio),
    "The current selection end value is correct (2)."
  );
}

// EventUtils just doesn't work!

function dragStart(graph, x, y = 1) {
  x /= window.devicePixelRatio;
  y /= window.devicePixelRatio;
  graph._onMouseMove({ testX: x, testY: y });
  graph._onMouseDown({ testX: x, testY: y });
}

function dragStop(graph, x, y = 1) {
  x /= window.devicePixelRatio;
  y /= window.devicePixelRatio;
  graph._onMouseMove({ testX: x, testY: y });
  graph._onMouseUp({ testX: x, testY: y });
}