/* Any copyright is dedicated to the Public Domain.
   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

const {
  drawText,
} = require("resource://devtools/client/memory/components/tree-map/draw.js");

add_task(async function () {
  // Mock out the Canvas2dContext
  const ctx = {
    fillText: (...args) => fillTextValues.push(args),
    measureText: text => {
      const width = text ? text.length * 10 : 0;
      return { width };
    },
  };
  const node = {
    x: 20,
    y: 30,
    dx: 500,
    dy: 70,
    name: "Example Node",
    totalBytes: 1200,
    totalCount: 100,
  };
  const ratio = 0;
  const borderWidth = () => 1;
  const dragZoom = {
    offsetX: 0,
    offsetY: 0,
    zoom: 0,
  };
  let fillTextValues = [];
  const padding = [10, 10];

  drawText(ctx, node, borderWidth, ratio, dragZoom, padding);
  deepEqual(
    fillTextValues[0],
    ["Example Node", 11.5, 21.5],
    "Fills in the full node name"
  );
  deepEqual(
    fillTextValues[1],
    ["1KiB 100 count", 141.5, 21.5],
    "Includes the full byte and count information"
  );

  fillTextValues = [];
  node.dx = 250;
  drawText(ctx, node, borderWidth, ratio, dragZoom, padding);

  deepEqual(
    fillTextValues[0],
    ["Example Node", 11.5, 21.5],
    "Fills in the full node name"
  );
  deepEqual(
    fillTextValues[1],
    undefined,
    "Drops off the byte and count information if not enough room"
  );

  fillTextValues = [];
  node.dx = 100;
  drawText(ctx, node, borderWidth, ratio, dragZoom, padding);

  deepEqual(
    fillTextValues[0],
    ["Exampl...", 11.5, 21.5],
    "Cuts the name with ellipsis"
  );
  deepEqual(
    fillTextValues[1],
    undefined,
    "Drops off the byte and count information if not enough room"
  );

  fillTextValues = [];
  node.dx = 40;
  drawText(ctx, node, borderWidth, ratio, dragZoom, padding);

  deepEqual(
    fillTextValues[0],
    ["...", 11.5, 21.5],
    "Shows only ellipsis when smaller"
  );
  deepEqual(
    fillTextValues[1],
    undefined,
    "Drops off the byte and count information if not enough room"
  );

  fillTextValues = [];
  node.dx = 20;
  drawText(ctx, node, borderWidth, ratio, dragZoom, padding);

  deepEqual(fillTextValues[0], undefined, "Draw nothing when not enough room");
  deepEqual(
    fillTextValues[1],
    undefined,
    "Drops off the byte and count information if not enough room"
  );
});