Fixed test suite on master

[goetas]

• libxml2 is not reliable for DTD info, fallback on PHP (not using DOM we gain some performance)
• removed travis tests for php 5.3
• removed lock file (since php7 requires different dependencies)
• enabled travis cache
• php7 sorting algorithm is/was buggy (stable vs unstable sorting) fixed this cases
• updated deprecated usages of phpcr odm tests
• fixed wrong tests with ObjectWithVirtualProperties (error become evident on php7)

note on test changes regarding virtual properties
ObjectWithVirtualProperties has 4 serializable fields (here fields are listed in order as the appear in the ObjectWithVirtualProperties class:

1. existField
2. VirtualValue
3. test
4. TypedVirtualProperty

The object has a custom order access rule:

1. prop_name
2. existField
3. foo

Since "prop_name" and "foo" do not exist, the serialization order should be:

1. existField
2. VirtualValue
3. test
4. TypedVirtualProperty

But all tests were expecting:

1. existField
2. test
3. VirtualValue
4. TypedVirtualProperty

that is wrong since "VirtualValue" appears before "test" in the code

[goetas]

this makes the sorting more "stable"

[goetas]

#573 and #511 will become obsolete if this gets merged

[schmittjoh]

Thanks for the detailed explanations, makes this much faster to review :)

[stof]

this does not allow installing any maintainer version of the package, as it only allows 2. and 2.1. this is pretty bad

[goetas]

as i understand this allows versions between 2.0.0 and 2.1.999 is it?

currently the test suite will fail with the validator 2.3.0

[scaytrase]

I think that the best option is to allow ~2.3|~3.0 and test against against several versions with travis. And fix if it does not work. See like FOSUB does https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/.travis.yml. At least you can do --prefer-stable and --prefer-lowest test to not creating a matrix mess for each major dependency

[goetas]

i agree that here at least 2.3 should be supported, but this requires fixing all the tests that are using ConstraintViolation in https://github.com/schmittjoh/serializer/blob/master/tests/JMS/Serializer/Tests/Serializer/BaseSerializationTest.php

since ConstraintViolation is not backward compatible from 2.1 to 2.3