Metaweb can use Freebase credentials to test read/write queries.
Set the environment variables FREEBASE_USER & FREEBASE_PASS to use these tests.

Checking if your kit is complete...
Looks good
Writing Makefile for WWW::Metaweb

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

cp lib/WWW/Metaweb.pm blib\lib\WWW\Metaweb.pm
cp lib/WWW/Metaweb/JSONLikePerl.pm blib\lib\WWW\Metaweb\JSONLikePerl.pm

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

	C:\cpanrun\build\5-10-0\bin\perl.exe "-MExtUtils::Command::MM" "-e" "test_harness(1, 'blib\lib', 'blib\arch')" t/*.t
t/01base.............1..2
ok 1 - module loaded okay
ok 2 - version is non-zero
ok
t/02emptysubclass....1..1
ok 1 - Empty package can subclass WWW::Metaweb
ok
t/11readquery........1..7
ok 1 - Can connect to Freebase. 
ok 2 - Can add query. 
ok 3 - Can send envelope. 
ok 4 - Result is okay. 
ok 5 - Result can be fetched as JSON. 
ok 6 - Result can be fetched as a Perl structure. 
ok 7 - Structure of test query is correct.
ok
t/12jsoncallback.....1..4
ok 1 - First callback called.
ok 2 - JSON sent to callback correctly.
ok 3 - Second callback called.
ok 4 - Callback altered JSON.
ok
t/21writequery.......1..8
ok 1 # skip No Freebase credentials provided
ok 2 # skip No Freebase credentials provided
ok 3 # skip No Freebase credentials provided
ok 4 # skip No Freebase credentials provided
ok 5 # skip No Freebase credentials provided
ok 6 # skip No Freebase credentials provided
ok 7 # skip No Freebase credentials provided
ok 8 # skip No Freebase credentials provided
ok
        8/8 skipped: various reasons
All tests successful, 8 subtests skipped.
Files=5, Tests=22,  2 wallclock secs ( 0.00 cusr +  0.00 csys =  0.00 CPU)

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

Installing C:\cpanrun\build\5-10-0\html\site\lib\WWW\Metaweb.html
Installing C:\cpanrun\build\5-10-0\html\site\lib\WWW\Metaweb\JSONLikePerl.html
Installing C:\cpanrun\build\5-10-0\site\lib\WWW\Metaweb.pm
Installing C:\cpanrun\build\5-10-0\site\lib\WWW\Metaweb\JSONLikePerl.pm
Appending installation info to C:\cpanrun\build\5-10-0\lib/perllocal.pod