Issue #1927648 by damiankloip, Wim Leers, marthinal, tedbow, Arla, alexpott, juampynr, garphy, bc, ibustos, eiriksm, larowlan, dawehner, gcardinal, vivekvpandya, kylebrowning, Sam152, neclimdul, pnagornyak, drnikki, gaurav.goyal, queenvictoria, kim.pepper, Berdir, clemens.tolboom, blainelang, moshe weitzman, linclark, webchick, Dave Reid, dabito, skyredwang, klausi, dagmar, gabesullice, pwolanin, amateescu, slashrsm, andypost, catch, aheimlich: Allow creation of file entities from binary data via REST requests

Issue #2853503 by Aki Tendo, alexpott, larowlan, Wim Leers, klausi, fgm, dawehner, mondrake, catch, Berdir, neclimdul, borisson_: Remove all assert('string') calls from Drupal core because deprecated in PHP 7.2

Issue #2765959 by davidwbarratt, Wim Leers, dawehner, borisson_, tstoeckler, tedbow, catch: Make 4xx REST responses cacheable by (Dynamic) Page Cache + comprehensive cacheability test coverage

Issue #2902723 by mfernea, ccjjmartin: Fix 'Drupal.Commenting.FunctionComment.ReturnCommentIndentation' coding standard

Issue #2869387 by tstoeckler, Wim Leers: Subclasses of ResourceTestBase for non-entity resources are required to add pointless code

Issue #2293697 by Wim Leers, dawehner, Jo Fitzgerald, clemens.tolboom, vedpareek, tedbow, Munavijayalakshmi, hchonov, alexpott, effulgentsia, tstoeckler, Crell, klausi, EclipseGc: EntityResource POST routes all use the confusing default: use entity types' https://www.drupal.org/link-relations/create link template if available

Issue #2866056 by vaplas, mpdonadio, Wim Leers, dawehner: ResourceTestBase should not have a timeout

Issue #2844046 by Wim Leers, dawehner, tedbow: REST Resource config entities do not respect the status (enabled/disabled)

Issue #2851746 by Berdir, Wim Leers: Support xdebug header in ResourceTestBase and move htttpClient property to right place

Issue #2815845 by dawehner, Wim Leers, alexpott, tedbow, Berdir, swentel, webflo: Importing (deploying) REST resource config entities should automatically do the necessary route rebuilding

Issue #2808233 by gnuget, dawehner, Wim Leers, tedbow, Chi, dysrama: REST 403 responses don't tell the user *why* access is not granted: requires deep Drupal understanding to figure out

Issue #2805281 by Wim Leers, damiankloip: ?_format=hal_json error responses are application/json, yet should be application/hal+json

Issue #2813755 by Wim Leers, dawehner, tedbow, damiankloip: JSON responses encoded inconsistently: make them all RFC4627-compliant

Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method

Revert "Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method"

This reverts commit 59781ffc.

Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method