digd.js/TESTS.md

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Tests todo:
A - SERVFAIL - should return empty response, ra 0
A - NXDOMAIN - should return SOA
A - NOERROR - should return A record
- or delegated NS record
Record delegated to self should return SOA record rather than NS delegation
Casing should match on question section, always.
Casing should match on other sections if a direct match? (not required, but efficient for compression pointers)
- www.EXample.COm + example.com = EXample.COm
- EXample.COm + www.example.com = www.EXample.COm
- (this should be taken care of by compression pointer logic, once implemented)
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Send malformed packets (both as queries and as answers):
- bad question count, answer count, etc
- bad rdata (too long, too short)
- proper packets, truncated
- randomly twiddled bits
- forward compression pointers
- compression pointers to wrong bits (throw error on non-ascii / unsafe chars)
Test that ANY queries return records of all types matching the domain
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Test that A queries only return A records, not others matching the domain
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Test that A queries for ANAME-enabled records (but no address) recurse (regardless of general recursion settings).
* 0-anames.example.com
* 1-aname.example.com
* 2-anames.example.com
Generally speaking test the cases of 0, 1, and 2 records of any given type (null case, single case, multi case)
### Variables
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```
port=65053
ns=localhost
# For the sake of accuracy, it's most important to test with the standard unix dig tool
digcmd="dig"
# For the sake of completeness, it's important to test with our very own dig tool
#digcmd="node bin/dig.js"
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```
### Run the server
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```
# Serve:
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node bin/digd.js +norecurse -p $port --input sample/db.json
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```
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### Manual Tests
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```
# Sample Data:
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# no A records for out-delegated.example.com
# two external NS records for delegted.example.com
# zone example.com exists
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# Test:
# should return NS records in AUTHORITY section, nothing else
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$digcmd @$ns -p $port A out-delegated.example.com
$digcmd @$ns -p $port ANY out-delegated.example.com
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# should return SOA records in AUTHORITY section, nothing else
$digcmd @$ns -p $port A in-delegated.example.com
$digcmd @$ns -p $port ANY in-delegated.example.com
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# should return NS records in ANSWER section, nothing else
$digcmd @$ns -p $port NS out-delegated.example.com
$digcmd @$ns -p $port NS in-delegated.example.com
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# Sample Data:
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# two A records for example.com
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# no NS records
# Test:
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# should return records in ANSWER section, nothing else
$digcmd @$ns -p $port A example.com
$digcmd @$ns -p $port AAAA example.com
$digcmd @$ns -p $port MX example.com
$digcmd @$ns -p $port SRV example.com
$digcmd @$ns -p $port TXT example.com
$digcmd @$ns -p $port ANY example.com
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# should return SOA records in AUTHORITY section, nothing else
$digcmd @$ns -p $port A doesntexist.example.com
$digcmd @$ns -p $port NS doesntexist.example.com
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# Sample Data:
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# two A records for a.example.com
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# has **internal** NS records
# Test:
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# should return record of correct type in ANSWER section, nothing else
$digcmd @$ns -p $port A a.example.com
$digcmd @$ns -p $port AAAA aaaa.example.com
$digcmd @$ns -p $port MX mx.example.com
$digcmd @$ns -p $port SRV srv.example.com
$digcmd @$ns -p $port TXT txt.example.com
$digcmd @$ns -p $port TXT mtxt.example.com
# should return record of correct type in ANSWER section, and SOA / NS
$digcmd @$ns -p $port ANY a.example.com
$digcmd @$ns -p $port ANY aaaa.example.com
$digcmd @$ns -p $port ANY mx.example.com
$digcmd @$ns -p $port ANY srv.example.com
$digcmd @$ns -p $port ANY txt.example.com
$digcmd @$ns -p $port ANY mtxt.example.com
# Test:
# all subdomains of a delegated domain should return NS for that domain
$digcmd @$ns -p 65053 ANY ns.example.com
$digcmd @$ns -p 65053 ANY foo.ns.example.com
$digcmd @$ns -p 65053 ANY bar.foo.ns.example.com
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# should return SOA record in AUTHORITY section, nothing else
$digcmd @$ns -p $port A doesntexist.a.example.com
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# should return NS records in ANSWER section, nothing else
$digcmd @$ns -p $port NS a.example.com
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# Test:
# wildcard record should match after static records
$digcmd @$ns -p $port ANY wild.example.com # no record
$digcmd @$ns -p $port ANY exists.wild.example.com # static record, before wildcard
$digcmd @$ns -p $port ANY foo.exists.wild.example.com # no record
$digcmd @$ns -p $port ANY doesntexist.wild.example.com # single-level wildcard
$digcmd @$ns -p $port ANY alsedoesntexist.wild.example.com # single-level wildcard
$digcmd @$ns -p $port ANY foo.doesntexist.wild.example.com # no second-level wildcard
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```