fune/devtools/client/shared/sourceeditor/test/browser_detectindent.js

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

"use strict";

const TWO_SPACES_CODE = [
  "/*",
  " * tricky comment block",
  " */",
  "div {",
  "  color: red;",
  "  background: blue;",
  "}",
  "     ",
  "span {",
  "  padding-left: 10px;",
  "}",
].join("\n");

const FOUR_SPACES_CODE = [
  "var obj = {",
  "    addNumbers: function() {",
  "        var x = 5;",
  "        var y = 18;",
  "        return x + y;",
  "    },",
  "   ",
  "    /*",
  "     * Do some stuff to two numbers",
  "     * ",
  "     * @param x",
  "     * @param y",
  "     * ",
  "     * @return the result of doing stuff",
  "     */",
  "    subtractNumbers: function(x, y) {",
  "        var x += 7;",
  "        var y += 18;",
  "        var result = x - y;",
  "        result %= 2;",
  "    }",
  "}",
].join("\n");

const TABS_CODE = [
  "/*",
  " * tricky comment block",
  " */",
  "div {",
  "\tcolor: red;",
  "\tbackground: blue;",
  "}",
  "",
  "span {",
  "\tpadding-left: 10px;",
  "}",
].join("\n");

const NONE_CODE = [
  "var x = 0;",
  "           // stray thing",
  "var y = 9;",
  "    ",
  "",
].join("\n");

function test() {
  waitForExplicitFinish();

  setup((ed, win) => {
    is(ed.getOption("indentUnit"), 2,
       "2 spaces before code added");
    is(ed.getOption("indentWithTabs"), false,
       "spaces is default");

    ed.setText(NONE_CODE);
    is(ed.getOption("indentUnit"), 2,
       "2 spaces after un-detectable code");
    is(ed.getOption("indentWithTabs"), false,
       "spaces still set after un-detectable code");

    ed.setText(FOUR_SPACES_CODE);
    is(ed.getOption("indentUnit"), 4,
       "4 spaces detected in 4 space code");
    is(ed.getOption("indentWithTabs"), false,
       "spaces detected in 4 space code");

    ed.setText(TWO_SPACES_CODE);
    is(ed.getOption("indentUnit"), 2,
       "2 spaces detected in 2 space code");
    is(ed.getOption("indentWithTabs"), false,
       "spaces detected in 2 space code");

    ed.setText(TABS_CODE);
    is(ed.getOption("indentUnit"), 2,
       "2 space indentation unit");
    is(ed.getOption("indentWithTabs"), true,
       "tabs detected in majority tabs code");

    teardown(ed, win);
  });
}