733300 - B2G SMS: Add test scripts for SMS function

Status: RESOLVED FIXED

(Core :: DOM: Device Interfaces, enhancement)

Description

[Vicamo Yang [:vicamo][:vyang]]

Test scripts were intended to be part of bug 729876, but is now separated as another minor issue to land the major function a.s.a.p.

Comment 1

[Vicamo Yang [:vicamo][:vyang]]

Attachment: WIP V1

add tests for several GsmPDUHelper member functions.

Comment 2

[Vicamo Yang [:vicamo][:vyang]]

Attachment: Part 1: fix removing redundent tailing char

fix a bug found with test scripts in part 2

Comment 3

[Vicamo Yang [:vicamo][:vyang]]

Attachment: Part2: Add test scripts

Comment 4

[Vicamo Yang [:vicamo][:vyang]]

There might be other potential errors in GsmPDUHelper.calculateUserDataLength():

01  calculateUserDataLength: function calculateUserDataLength(options) {
02    ...
03    for (...) {
04      ...
05      // Calculate full user data length, note the extra byte is for header len
06      let userDataLength = length + (headerLen ? headerLen + 1 : 0);
07      ...
08      if (userDataLength <= options.body.length) {
09        // Found minimum user data length already
10        return;
11      }
12    }
13    ...
14  }

In line 6, the unit of `headerLen` is octet, while that of `length` is septet. Under some situations, the result may vary.

In line 8~10, when it comes with a string with numerous ineffective characters like <escape>, the calculated encoded string length may be much less than options.body.length, and it is therefore possible for another encoding to have an even shorter result. For example, an input string of length 10 might get calculated cost 8 with several characters encoded with single shift mechanism. But another encoding might get cost 5 with all characters encoded with locking shift mechanism. This should be a minor issue because users cannot key-in \uffff and \ufffe, which are internally assigned to ineffective characters <escape> and <resctl>.

Comment 5

[Philipp von Weitershausen [:philikon]]

Comment on attachment 603619 [details] [diff] [review]
Part2: Add test scripts

Sweet!

Comment 6

[Philipp von Weitershausen [:philikon]]

Comment on attachment 603612 [details] [diff] [review]
Part 1: fix removing redundent tailing char

Good catch, and also nice work on that comment!

Comment 7

[Philipp von Weitershausen [:philikon]]

(In reply to Vicamo Yang from comment #4)
> There might be other potential errors in
> GsmPDUHelper.calculateUserDataLength():
> <snip>

Good sleuthing. Please file follow-up bug(s). Thanks!

Comment 8

[Philipp von Weitershausen [:philikon]]

https://hg.mozilla.org/mozilla-central/rev/a4415019a57a
https://hg.mozilla.org/mozilla-central/rev/453d5c733caa