DRIVERS-2914: Don't create output collection in aggregate tests (mongodb#1660)

* DRIVERS-2914: Don't create output collection in aggregate tests

* Remove outcome assertion

Author: alcaeus

source/crud/tests/unified/aggregate-write-readPreference.json

@@ -51,9 +51,6 @@ initialData:
       - { _id: 1, x: 11 }
       - { _id: 2, x: 22 }
       - { _id: 3, x: 33 }
-  - collectionName: *collection1Name
-    databaseName: *database0Name
-    documents: []
 
 tests:
   - description: "Aggregate with $out includes read preference for 5.0+ server"
@@ -78,12 +75,6 @@ tests:
                 $readPreference: *readPreference
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: &outcome
-      - collectionName: *collection1Name
-        databaseName: *database0Name
-        documents:
-          - { _id: 2, x: 22 }
-          - { _id: 3, x: 33 }
 
   - description: "Aggregate with $out omits read preference for pre-5.0 server"
     runOnRequirements:
@@ -108,7 +99,6 @@ tests:
                 $readPreference: { $$exists: false }
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
 
   - description: "Aggregate with $merge includes read preference for 5.0+ server"
     runOnRequirements:
@@ -131,7 +121,6 @@ tests:
                 $readPreference: *readPreference
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
 
   - description: "Aggregate with $merge omits read preference for pre-5.0 server"
     runOnRequirements:
@@ -152,4 +141,3 @@ tests:
                 $readPreference: { $$exists: false }
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome

source/crud/tests/unified/aggregate-write-readPreference.yml

@@ -43,11 +43,6 @@ createEntities:
       database: *database0
       collectionName: &collection0Name coll0
 
-initialData:
-  - collectionName: *collection0Name
-    databaseName: *database0Name
-    documents: []
-
 tests:
   - description: "Database-level aggregate with $out includes read preference for 5.0+ server"
     runOnRequirements:
@@ -73,11 +68,6 @@ tests:
                 $readPreference: *readPreference
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: &outcome
-      - collectionName: *collection0Name
-        databaseName: *database0Name
-        documents:
-          - { _id: 1 }
 
   - description: "Database-level aggregate with $out omits read preference for pre-5.0 server"
     runOnRequirements:
@@ -102,7 +92,6 @@ tests:
                 $readPreference: { $$exists: false }
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
 
   - description: "Database-level aggregate with $merge includes read preference for 5.0+ server"
     runOnRequirements:
@@ -127,7 +116,6 @@ tests:
                 $readPreference: *readPreference
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
 
   - description: "Database-level aggregate with $merge omits read preference for pre-5.0 server"
     runOnRequirements:
@@ -148,4 +136,3 @@ tests:
                 $readPreference: { $$exists: false }
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome