In sendDiscoMessage there is a check of whether the connection is
closed, which is not being reliably exercised by other tests.
This shows up in code coverage reports, the lines of code in
sendDiscoMessage are alternately added and subtracted from
code coverage.
Add a test to specifically exercise and verify this code path.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
Start an HTTP server to accept POST requests, and upload some logs to
it. Check that uploaded logs were received.
Code in logtail:drainPending was not being reliably exercised by other
tests. This shows up in code coverage reports, as lines of code in
drainPending are alternately added and subtracted from code coverage.
This test will reliably exercise and verify this code.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
All cases in lessThan are not reliably exercised by other tests.
This shows up in code coverage metrics as lines in lessThan are
alternately added and removed from coverage.
Add a test case to systematically test all conditions.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
In derpWriteChanOfAddr when we call derphttp.NewRegionClient(),
there is a check of whether the connection is already errored and
if so it returns before grabbing the lock. The lock might already
be held and would be a deadlock.
This corner case is not being reliably exercised by other tests.
This shows up in code coverage reports, the lines of code in
derpWriteChanOfAddr are alternately added and subtracted from
code coverage.
Add a test to specifically exercise this code path, and verify that
it doesn't deadlock.
This is the best tradeoff I could come up with:
+ the moment code calls Err() to check if there is an error, we
grab the lock to make sure it would deadlock if it tries to grab
the lock itself.
+ if a new call to Err() is added in this code path, only the
first one will be covered and the rest will not be tested.
+ this test doesn't verify whether code is checking for Err() in
the right place, which ideally I guess it would.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
To be honest I'm not fond of Golden Bytes tests like this, but
not so much as to want to rewrite the whole test. The DNS byte
format is essentially immutable at this point, the encoded bytes
aren't going to change. The rest of the test assumptions about
hostnames might, but we can fix that when it comes.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
+ we don't need an exactly accurate count of the number of times each
time ran. Remove -covermode, the default "set" will be fine to just
track whether a given line ran at all.
+ add -benchtime=1x. We only need to run the benchmarks once.
+ -bench=. to match any character.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
We include -bench because some parts of the codebase, like
smallzstd, do not have regular unit tests but do have very
good benchmark tests that covers all functions.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
Denton GentryandDenton Gentry