<!
DOCTYPE html>
<
meta charset=
"utf-8">
<
title>NetInfo basic functionality</
title>
<
link rel=
"help" href=
"https://wicg.github.io/netinfo/">
<
script src=
"/resources/testharness.js"></
script>
<
script src=
"/resources/testharnessreport.js"></
script>
<
script>
test(function() {
assert_in_array(navigator.connection.type, [
"bluetooth",
"cellular",
"ethernet",
"mixed",
"none",
"other",
"unknown",
"wifi",
"wimax"],
'type is unexpected');
},
"type attribute");
test(function() {
assert_in_array(navigator.connection.saveData, [false, true],
'saveData is unexpected');
},
"saveData attribute");
test(function() {
assert_greater_than_equal(navigator.connection.downlinkMax, 0);
},
"downlinkMax attribute");
test(function() {
assert_in_array(navigator.connection.effectiveType, [
"slow-2g",
"2g",
"3g",
"4g"],
'effectiveType is unexpected');
},
"effectiveType attribute");
test(function() {
var rtt = navigator.connection.rtt;
assert_greater_than_equal(rtt, 0);
assert_less_than_equal(rtt, 3000);
assert_equals(rtt % 50, 0,
'rtt must be a multiple of 50 msec');
},
"rtt attribute");
test(function() {
var downlinkKbps = navigator.connection.downlink * 1000;
assert_greater_than_equal(downlinkKbps, 0);
assert_less_than_equal(downlinkKbps, 10000);
// Verify that downlinkKbps is a multiple of 50.
var quotient = parseInt(downlinkKbps / 50, 10);
// mod is the remainder left after dividing downlinkKbps by 50 while
// restricting the quotient to an integer. For example, if downlinkKbps is
// 1050, then mod will be 0. If downlinkKpbps is 1030, mod will be 30.
var mod = downlinkKbps - 50 * quotient;
assert_less_than_equal(0.0, mod,
'mod outside the range');
assert_greater_than(50.0, mod,
'mod outside the range');
// It is possible that mod is not exactly 0 because of floating point
// computations. e.g., downlinkKbps may be 99.999999, in which case mod
// will be 49.999999.
assert_true(mod < 1e-5 || (50-mod) < 1e-5,
'downlink must be a multiple of 50 kbps');
},
"downlink attribute");
</
script>
