We now only assign target once, rather than
assigning it then overwriting it for the
not-sent-by-me use case.
I tried to extract a "selector" here but the linter
complained.
Splitting up the tests here ensures we don't
needlessly do extra work here. (In the prior
clumsy implementation, the second test that
I split out here would fail due to the lack
of us setting up the jquery stub.)
This warning was added in #6551. It’s not for any version of the
current Electron app, which we warn about on the server side with
DESKTOP_WARNING_VERSION, but rather some pre-Electron app so ancient I
don’t even know what it is. Apparently it communicated using the
window.bridge global, so eradicate that too.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Note that at this point, it's not possible to create moderator users;
this just will make it easier to write tests for logic involving them
as we develop the feature.
‘function’ and ‘=>’ are not equivalent because they bind ‘this’
differently. For these functions, the ‘function’ semantics are
intentional.
This reverts part of commit 1a241cef88
(#17388).
Signed-off-by: Anders Kaseorg <anders@zulip.com>
We now call $.clear_all_elements at the top
of run_test.
We have to exempt two modules from the new regime:
compose
settings_user_groups
Also, if modules do set_global("$", ...) we don't
try to call the non-existent function.
It's possible we'll want to move to something like
this, but we might want to clean up the two
sloppy_$ modules first:
// AVOID THIS:
// const $ = require("zjquery")
run_test("test widget", ({override, $}) => {
override(foo, "bar", ...);
$.create(...);
// do stuff
});
It was checking whether the selector string is itself null, not
whether it selects anything!
Use page.waitForSelector(…, {hidden: true}) instead.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Move clear_zulip_refs into restore, and rewrite it without lodash. We
no longer need the requires array, and zrequire is now nothing more
than a wrapper around require.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
We weren't exercising this method in any
meaningful way during the tests, and when
do add coverage, we probably want to just
test it directly.
We also kill off stub_selector(), which was
never well-documented.
Callers can either explicitly pass in children,
stub out $(...)[0] as needed, or just
circumvent jQuery complications with override.
Note the reactions test was broken before,
since $(...)[0] was always returning the same
stub.
Like using $('input') is too broad a selector and shouldn't
be used in the codebase. With this error messages, contributors
can easily understand that now.
We no longer export make_zjquery().
We now instead have a singleton zjquery instance
that we attach to global.$ in index.js.
We call $.clear_all_elements() before each module.
(We will soon get even more aggressive about doing
it in run_test.)
Test functions can still override $ with set_global.
A good example of this is copy_and_paste using the
real jquery module.
We no longer exempt $ as a global variable, so
test modules that use the zjquery $ need to do:
const $ = require("../zjsunit/zjquery");
The "silent" option was kind of evil, as it had
$(...).find(...) passing back "self" instead of a stub.
Now we just use $(...).set_find_results(...) or
override(...) to simulate/bypass drawing code.
(It turns out hash_util didn't even need this option.)
The tooltips for the left panel of stream settings
have been broken since November 2018 due to my
commit 8f915da2ca.
The code prior to 2018 was restoring tooltips
right inside the loop where we were detaching
the row from the DOM to put it back into the
DOM at another place. And then I tried to
just add them in bulk, forgetting that I was
in the middle of all the DOM manipulation (and
hence my selector for the loop was a noop).
Also, I don't think we've ever had them for live
events that add streams. (I fixed that too.)
It's not clear to me that this code is actually
necessary, as we get hover help without
calling $(...).tooltip(...) properly.
This is probably why we didn't notice any
breakage when we merged my 2018 commit.
We generally want to avoid clicking on DOM elements
that may not actually be visible due to the prior
operation. Instead, we can just find the visible
element after each step.
I also introduce a couple helper functions to
de-clutter the click/unclick/click steps, and I do
a couple extra clicks for good measure.
You can verify that the test will fail if you
add an early return to update_check_button_for_sub.
We just want to reset the scrollbar here, which
we still do via ui.reset_scrollbar.
You don't want to preserve scroll position if
you are filtering or re-sorting.
We have long had this annoying two-pass way of building the
DOM that I am trying to eliminate.
The function names that I introduce here describe the current
situation more accurately.
In passing I make it so that we only throttle redraws when
users are actually typing. Using a throttled redraw when
you click on the sort icons is at best unnecessary, and it
may actually aggravate double clicks.
This splits the one big `run_test` block into
add/edit/delete parts, for better clarity.
This also removes the `with_field` calls and
uses the override style instead, which is
preferred because it makes sure the stubbed
function is actually called.
This commit replaces `with_field` calls to
use the override style instead.
`override` is preferred since it makes sure
the stubbed function is actually called,
while `with_field` doesn't, which makes it
hard to spot dead code.
This commit replaces all `with_stub` calls and
explicitly calls `make_stub` instead.
The `with_stub` helper does not add much clarity
hence we now use scoped stub objects instead.
This de-indents some blocks where scoping isn't
required, for example when there is a single
stub object inside a `run_test` function.
With this change, we also need to explicitly
assert `num_calls`.
We can relax this restriction in the future, but
basically every time it came up for me, the test
code was just disorganized, or it had an easy
workaround.
These are still kind of a mess.
The old code combined the worst of both worlds:
- we had one monolithic test
- we called the events multiple times,
verifying a different stub each time
Now I make the tests more granular.
We could actually re-combine the tests, but
in a nicer way, so that we just set
up multiple stubs and verify that all stubs
get correctly invoked.
There is also some code cleanup here--in dispatch_subs,
we don't stub stream_data, so it's easier to write
deeper tests that actually validate the data changes.
This prevents a bug where we interpret "2something"
as a modern slug instead of a legacy stream name.
The bug was probably somewhat unlikely to happen in
practice, since it only manifests if 2 is an actual
stream_id.
We still need to write to these globals with set_global because the
code being tested reads from them, but the tests themselves should
never need to read from them.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit makes it so that MessageListData
methods always attempt to filter muted messages.
We later, in a new function
(`messages_filtered_for_topic_mutes`)
check if `excludes_muted_topics` is true or not,
and skip the filtering work if it isn't.
This new function consistently returns a new list.
This refactor will later allow us to write clean
and concise code as part of mute users.
This commit also refactors the muting tests
for MessageListData, which were earlier
spread across two `run_test` functions.
These tests should remain organized,
since similar tests will be added as part of
user mutes in future commits.
Previously, the `muting_enabled` property of
MessageListData class was used to indicate whether
some messages in the message list need to be
filtered due to topic muting, depending on the
narrow. For example, we exclude messages belonging
to muted topics from stream narrows, but not from
search narrows.
The name `muting_enabled` is a bit confusing, and hence is
changed to `excludes_muted_topics`.
It is also important that the name be specific, since
a similar new property will be added for user mutes
in future commits.
I have a local branch with a hacked up version of
zjquery that lets you basically detect when zjquery
stubs are never actually invoked by real code.
There are some nuances to that kind of audit, so
I haven't pushed the auditing code, but these
are low hanging fruit.
I now just use inline the code to create stubs
for the line items in the markdown_content
container, and I don't add methods to the
zjquery stubs.
And then I use the new "children" feature in
zjquery's `$.create(sel, opts)` to set up
$(".markdown_content"), which means I don't
have to stub `each` any more.
It's actually pretty rare in our codebase to
call methods like `$(...).map` or `$(...).each`,
but we now support them better in zjquery.
You can pass a list of child elements now to
`$.create(...)`.
Fixes the sorting button labels in stream settings, which were
regressed by commit f8fbae4d8e (because
the HTML was not marked as being HTML).
Signed-off-by: Anders Kaseorg <anders@zulip.com>
This is a minor refactor in the muting test in
`message_list`.
The `unmuted_messages` function filters out messages only
considering topic mutes, and not stream mutes.
The test previously made it look like we were testing
stream muting, by stubbing the `is_topic_muted` on the
basis of `stream_id`.
This also replaces the stub and uses real data instead.
This is a prep commit, which renames some variables
and functions involved in topic muting to include
the word "topic" in them.
This is done to have clarity when similar code
will be added as a part of the mute-user in
future commits.
Replaced methods/functions of moment.js with date-fns library.
The motive was to replace it with a smaller frontend timezone library.
Date-fns ~ 11.51 kb
moment.js ~ 217.87 kb
Some of the format strings change because date-fns encodes them
differently from how moment did.
Fixes#16373.
It's not clear to me why this code was necessary,
and I assume it was either originally written
with a bit of misunderstanding of how zjquery
works or it became unnecessary with some refactoring
of the "real" code.
We move some of the data setup to the top of the file.
We also remove some get_sub() calls that aren't really
necessary now that peer_data and stream_data are more
independent.
The maybe_clear_subscribers() function was an artifact of
when we used to attach subscribers to the "sub" records in
stream_data.js. I think it was basically a refactoring
shim, and due to some other recent cleanup, it was only
used in test code.
We also change how we validate stream ids.
Going forward, peer_data just looks up stream_ids with the
normal stream_data API when it's trying to warn about
rogue stream_ids coming in. As I alluded to in an earlier
commit, some of the warning code here might be overly
defensive, but at least it's pretty self-contained.
Now when we want to measure how long a block
of code takes to execute, we just wrap it with
`blueslip.measure_time`, instead of the awkward
idiom from my original commit of getting a callback
function.
My rationale for the original scheme was that I
wanted to minimize diffs and avoid changing
`const` to `let` in a few cases, but I believe
now that the function wrapper is nicer.
In a few cases I just removed the blueslip timing
code, since I was able to confirm on czo that
the times were pretty minimal.
We now use the same code in all places to
get the bucket of user_ids that correspond
to a stream, and we consistently treat
a stream as having zero subscribers, not
an undefined number of subscribers, in
the hypothetical case of us asking about
a stream that we're not tracking.
The behavior for untracked streams has
always been problematic, since if a
stream is untracked, all bets are off.
So now if we don't "track" the stream,
the subscriber count is zero. None of
our callers distinguish between undefined
and zero.
And we just consider the stream to be subscribed
by a user when add_subscriber is called,
even if we haven't been told by stream_data
to track the stream. (We also stop
returning true/false from add_subscriber,
since only test code was looking at it.)
We protect against the most likely source
of internal-to-the-frontend bugs by adding
the assert_number() call.
We generally have to assume that the server
is sending us sensible data at page load
time, or all bets are off.
And we have good protections in place
for unknown ids in our dispatch code
for peer_add/peer_remove events.
We also streamline some of the error handling code
by doing everything up front. This will prevent
scenarios where a single bad stream_id/user_id causes a
bunch of the same warnings in an inner loop.
This removes a bit of complexity. If a piece of
settings code needs to render a stream with
subscribers, it just asks for it.
We no longer have the brittle, action-at-a-distance
mechanism of mutating the subscriber count on to
the stream_data version of a sub.
Stream subs are pretty small, so making copies of
them is cheap, and the blueslip timings from the
previous commit can help confirm that.
There is some discussion of putting `subscriber_count`
on the Stream model, which may eventually get us
away from tracking it in `peer_data.js`, but we will
cross that bridge when we get there. See
https://github.com/zulip/zulip/issues/17101 for
more details.
The weekly stream traffic is a better tiebreaker
for stream typeaheads than subscriber count, as
it's more directly a measure of a stream's current
relevance.
Normally stream traffic and subscriber counts are
closely correlated, but a good example for me is
the #twitter feed on czo, which only has 80 subscribers,
but which gets more traffic than our #integrations
stream (with 16k subscribers). I would rather
see #twitter win the tiebreaker (if it even got
to the tiebreaker).
The main motivation behind this fix, though, is
to break our dependency on peer_data, which has
some upcoming changes that will introduce some
performance tradeoffs, and I want one less place
to audit.
Also, it will be easier long term to share this
code with mobile if we don't require mobile
to pull in our peer_data dependency. (The webapp
has different forces than mobile that dicate
our data structures.)
We use day_old calculated based on day instead of hours to
render last seen values. This fixes us incorrectly quoting
anything 24 - 48 hours ago as Yesterday and
incorrectly quoting `time` that are Yesterday
but < 24 hours ago in 'x hours ago' format.
We were adding `expanded` class to left-sidebar when searching
for streams even if the left-sidebar was not in the popover state.
This cased confusion with popovers.any_active returning true,
when actually it is not.
topic_generator previously included an entire lazy generator
combinator library that was used four times. These straightforward
equivalent loops might not be as fun but they are way simpler.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Commit f0f6138f01 deleted the
translation for "Saved. Please <a class='reload_link'>reload</a> for
the change to take effect." which caused puppeteer test 16-settings to
fail as it had hardcoded the translation for German. This commit
changes the expected text and hence fixes the failing puppeteer test.
After this change all peer_data functions consistently
use stream_id rather than some "sub" object whose
data type is complicated by all sort of fields that
don't really concern how we track subscribers.
The goal here is to make all our peer_data functions
basically work in id space. Passing a full `sub`
to these functions is a legacy of when subscriber
info was attached to a full stream "sub" object,
but we don't care about anything sub-related
(color, description, name, etc.) when we are
dealing with subscriptions.
When callers pass in stream_id, you can be more
confident in a quick skim of the code that we're
not mutating anything in the "sub".
This de-clutters stream_data a bit. Since our
peer data is our biggest performance concern,
I want to contain any optimizations to a fairly
well-focused module.
The name `peer_data` is a bit of a compromise,
since we already have `subs.js` and we use
`sub` as a variable name for stream records
throughout our code, but it's consistent with
our event nomenclature (peer/add, peer/remove)
and it's short while still being fairly easy
to find with grep.
This sets us up to use better system-wide data structures
for tracking subscribers.
Basically, instead of storing subscriber data on the
"sub" objects in stream_data.js, we instead have a
parallel data structure called stream_subscribers.
We also have stream_create, stream_edit, and friends
use helper functions rather than accessing
sub.subscribers directly.
In commit ebea17b9a6,
we added an extra fetch to get accurate data for the top
items in recent topics table.
But the `narrow` parameter wasn't passed to the endpoint,
this resulted in fetching the user's overall message
history including the muted streams/topics which aren't
required by the recent topics table.
`operators` can be replaced as we set the same value for
the `narrow_state` module and the narrowed message list's
filter, when activating the narrow.
The changes made in this commit are as follows:
* The `remove_messages` is moved to the `message_events.js`
file from `ui.js`.
* We refactor `MessageListData.change_message_id` to no
longer require an `opts` parameter as this function
just returns whether we need to rerender or not.
The blueslip error block can be removed since we made
the change to no long defer the data updates in
commit 3b5ba6b2c1,
this case can no longer occur.
The changes made in this commit are as follows:
* We remove the now unused `ui.find_message` which was added
in commit 1666403850.
* We change the function paramter to now accept message ids
instead of messages to eliminate redundant message ids to
message convertion as only the id is required.
* The remove method in MessageListData did not remove the
messages from the hash, it removed only from the items,
this fixes it.
* This commit also fixes a bug where messages are not added
to the current message list if an event is recieved where
messages are moved to this current narrow.
Only the message removal logic was present, which has been
refactored in this commit.
Steve asked me to remove this, since the tictactoe game was always
intended as a proof of concept. Now that we have poll and todo
widgets, the sample code for tictactoe has much less value.
We replace the content and type in test_widgets.py to maintain
coverage.
This fixes a bug where the autocomplete for topics
deleted all the text content, if the topic jump is used
without entering any text.
The topic typeahead is automatically set up, on entering
the ">" key for stream completions. Therefore there is a
case where the user can select a typeahead item without
entering any text.
Thus the token length will be 0 and `beginning.slice(0, -0)` returns
"" instead of the `beginning` string. The case is only relevant for
"topic_list" completion as we don't set up the typeahead for empty
strings.
Fix this by reverting a hunk of
48f5e5179a, adding a test.
Fixes#16599.
Co-authored-by: Rohitt Vashishtha <aero31aero@gmail.com>
Refactor test_video_link_compose_clicked into seperate tests for:
No video provider.
Jitsi as the provider.
Zoom as the provider.
BigBlueButton as the provider.
While working on shifting toward native browser time zone APIs
(#16451), it was found that all but very recent Chrome and Node
versions reject certain legacy timezone aliases like US/Pacific
(https://crbug.com/364374).
For now, we only canonicalize the timezone property returned in user
objects and not the timezone setting itself.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
We now can send an implied matrix of user/stream tuples
for peer_add and peer_remove events.
The client code basically does this:
for stream_id in event['stream_ids']:
for user_id in event['user_ids']:
update_sub(stream_id, user_id)
We used to send individual events, which gets real
expensive when you are creating new streams. For
the case of copy-to-stream case, we should see
events go from U to 1, where U is the number of users
added.
Note that we don't yet fully optimize the potential
of this schema. For adding a new user with lots
of default streams, we still send S peer_add events.
And if you subscribe a bunch of users to a bunch of
private streams, we only go from U * S to S; we can't
optimize it down to one event easily.
Upstream has slightly changed the whitespace around stashes. Take
this opportunity to clean up the extra blank lines we were outputting.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Using web_public_guest for anonymous users is confusing since
'guest' is actually a logged-in user compared to
web_public_guest which is not logged-in and has only
read access to messages. So, we rename it to
web_public_visitor.
Since the denmark stream stub has subscribed = true,
we include the current user id in it's subscribers set.
We remove user `me` from sweden stream stub for the same
reason.
For streams in which only full members are allowed to post,
we block guest users from posting there.
Guests users were blocked from posting to admin only streams
already. So now, guest users can only post to
STREAM_POST_POLICY_EVERYONE streams.
This is not a new feature but a bugfix which should have
happened when implementing full member stream policy / guest users.
For the lines of code that I changed here, we were
getting field reports that the below code
was getting `undefined`:
emoji.all_realm_emojis.get(r.emoji_code)
It's not really clear to me how this could happen,
but we definitely should fail softly here. We
still report it as an error, but we let the function
return and don't trigger a TypeError.
If there's a legitimate reason for realms to delete
realm emojis, we should either downgrade this to a
warning or consider a strategy of back-fixing messages
when realm emojis get deleted.
We rename all_everyone_warn_threshold to
wildcard_mention_large_stream_threshold as we would
be adding wildcard_mention_policy and this
constant will also be used to show error
in case when wildcard_mention_policy is set
to admins only.
In c563cdba61 we imported the generated
pygments data from outside `/shared` folder. This had a couple of
problems:
* Using `require` was the wrong way to do the import in ES6 modules.
* Since we get the data from outside `/shared`, clients like
zulip-mobile would not receive it - this case had to be handeled.
Here, we fix the above problems by receiving the data when initializing
through fenced_code.initialize, and when the pygments data structure is
empty (for zulip-mobile) we fallback to the old header structure without
the data-code-language tag.
Also, this commit does a small refactor to improve the way we fetch
canonicalized_alias from pygments_data.
Tests amended.
The failures saying incorrect password were caused due to
change in focus. Some actual code of ours calls focus on
the modal when opened but puppeteer was starting to type
before this occurs due to which the test was only able
to enter a part of string.
This was happening with change full name too but less
frequently as it's a relatively shorter string.
As a fix, we wait till the focus is on the modal and then
start typing.
Instead of prohibiting ‘return undefined’ (#8669), we require that a
function must return an explicit value always or never. This prevents
you from forgetting to return a value in some cases. It will also be
important for TypeScript, which distinguishes between undefined and
void.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
It would conflict with the stream_id variable after migration to an
ES6 module, and adds no real convenience over stream_sub().
Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit enables keyboard support for user info popovers for
navigating through popover options using up/down keys.
We add get_user_info_popover_items function, whose implementation
is different from other similar functions. Instead of using
popover_data.$tip we directly use $("div.user-info-popover")
because when we open the popover of bot owner from the bot
popover, the element which opens the popover is removed from
DOM and popover_data is undefined.
This commit replaces the "Reply mentioning user" option with "Copy mention
syntax" for user info popovers that are not opened from a message.
Clicking on "Copy mention syntax" will copy the mention syntax of user to
clipboard.
This change is done because user popovers not opened from message are not
linked to any message.
Previously, compose_ui.autosize_textarea didn't work while editing
messages in many cases (uploading files, typeaheads, keydown handling,
etc.).
Refactored the autosize_textarea function in compose_ui to work
while editing messages too and added appropriate argument for the
introduced function parameter at all occurences of the function
use.
Also, updated the corresponding test cases.
On uploading a few files from markdown_preview mode of compose box and
then switching back to edit mode, the compose box doesn't get resized.
It even doesn't allow to scroll through the content.
Fixed this by switching back to the edit mode everytime user uploads
some file in markdown_preview mode as there's no use of staying in
markdown_preview mode anyways after uploading a file as the preview
doesn't get updated.
Also, updated the corresponding test cases.
Fixes: #16296.
This mimics the backend logic for adding the data-attribute -
to know what Pygments language was used to highlight the code
block - in locally echoed messages.
New test added checks our logic for canonicalizing pygments alias
(for both frontend and backend).
Other fixtures and tests amended.
We need this information in the frontend to:
* Display the 'view in playground' option for locally echoed messages.
* When we add a UI settings for realm admins to configure their
playground choices, we'll need to use these canonicalized aliases
for displaying the option.
Hence, this tweaks the tool which generates pygments_data.json to contain
the data we need.
Bumping major PROVISION_VERSION since folks need to provision in both
directions.
Tests amended.
Wait for disable_stream_notifications selector to be visible
before clicking as it could cause flakes if the test tries
to click without it being visible.
Added a stronger validation of waiting for text "Verona" to
appear but that didn't really seem to have worked though it
seemed like fixing the flake by passing ~600 runs.
So, change the puppeteer click to a click through evaluate
as we had experiences where page.click() didn't work sometimes.
Though this has passed 1000 runs on CI, I'm not very certain
if this fixed it as this test passed 1000 times with my previous
PR fixing the same flake.
Currently, compose box placeholder text for PMs only gets updated
when the focus shifts to it.
With this change, the text is now also updated if recipients are
added or removed.
Fixes#15897.
The code to run single files was added
in c15695e514,
and it's just kinda strange code.
We already do a lot of file logic in Python
to check for line-coverage, so it's easier
to just have all the logic in Python.
This adds a new feature--you can now specify
the actual file:
./tools/test-js-with-node frontend_tests/node_tests/people.js
(This is helpful if you just want to use
shell autocomplete.)
Another minor change is that if you specify
individual files, we won't sort them. This is
important when you're trying to hunt down test
leaks.
Finally, we have a nicer message if we can't find
the file.
Because `util` is so late in the alphabet, this
leak never surfaced in practice, but I tried running
the node tests in reverse, and this leak came
up if you ran `util` before `stream_list`. I guess
it's nice that `stream_list` actually exercises
the difference between a dumb sort and an
Intl-aware sort.
It's possible that we should just assume that
Intl.Collator is always available at this point,
which would eliminate the need for this test.
There is good reason to do this (explanation is bit long!). With the
TypeScript migration, and the require and ES6 migrations that come
with it, we use require instead of set_global which loads the entire
module. Suppose we have a util module, which is used by some other
module, say message_store, and util is being required in message_store
since it is removed from window. Then, if a test zrequires
message_store first, and then zrequires the util module qand mocks one
of its methods, it will not be mocked for the message_store
module. The reason is:
1. zrequire('message_store') leads to require('util').
2. zrequire('util') removes the util module from cache and it is
reloaded. Now the util module in message_store and the one in
the test will be different and any updates to it in tests won't
be reflected in the actual code.
Which can lead to confusion for folks writing tests. I'll mention this
can be avoided doing zrequire('util') first but...that is not ideal.
And, since there was one outlier test that relied on this behavior,
we add the namespace.reset_module function.
Fixes#16252.
icon* classes are used by bootstrap for displaying glyphicons.
We removed these classes in our custom version of bootstrap 2.1.1;
but since our reset to v2.3.2, they have been added again and hence
any classes starting with icon* in zulip will have to be renamed.
We were not updating the trailing bookend on deactivation of stream
if the user was narrowed to deactivated stream and this commit fixes
this.
For subscribed streams, we just show the trailing bookend with
content as 'This stream has been deactivated' and hide the
Unsubscribe button.
For unsubscribed streams, we change the content of trailing bookend
to 'This stream has been deactivated' and hide the Subscribe button.
Fixes#15999.
This completes the remaining work required to support
addition of all members of another stream.
This allows the creation of stream pills on pasting
the #streamname and copying it from the stream pill.
The user pills uses email ids instead.
And also allows creating stream pills when the user
hides the typeahead.
Tested by commenting out the "set_up_typeahead_on_pills"
line in `stream_edit.js`.
A `node_tests/stream_pill.js` file has been created
for the node tests and the other half of the coverage
check takes place in `node_tests/stream_edit.js`.
This fixes the regression introduced in the pervious
commit to regain the 100% line coverage in `user_pill.js`
as well as `stream_pill.js`.
The new `stream_edit.js` mainly tests for:
* The stream related queries of the typeahead in `user_pill.js`
* The "Add subscribers" event handlers.
* The event handler which displays the settings for a stream.
Now that all casper tests have been migrated to
puppeteer, there's no need for having casper
related things.
Removed the casperjs package and removed/replaced
casper in few places with puppeteer.
Only removed few of them which I'm confident
about. Also didn't make any changes in docs
as it would be easier to remove them while
adding puppeteer docs.