prefixArgs uses os.Setenv in e2e tests instead envMap.
This creates overwrites in some test cases and have an impact
on test quality and isolation between tests.
This PR uses ctlcontext envMap in each tests with high priority
and merges os environment variables with low priority.
The e2e tests can be flaky due to various tests mutating shared mutable
fixtures, causing non-deterministic behavior depending on the test set, order,
etc.
For example, `configTLS` is mutated in at least two tests in such a way that the
config is potentially invalidated for any subsequent test running in the same
process (e.g. by setting the `enableV2` field). This particular example caused
a substantial amount of confusion diagnosing the new test introduced for
https://github.com/etcd-io/etcd/pull/12370.
Independent tests should not share mutable state unless deliberately. This patch
refactors the e2e test config fixtures to safeguard against these problems by
replacing the package variables (which cannot easily be made immutable) with
functions that return new instances.
Marked all 'integrational, e2e' as skipped in the --short mode.
Thanks to this we will be able to significantly simplify ./test script.
The run currently takes ~23s.
With (follow up) move of ~clientv3/snapshot to integration tests (as
part of modularization), we can expect this to fall to 5-10s.
```
% time go test --short ./... --count=1
ok go.etcd.io/etcd/v3 0.098s
? go.etcd.io/etcd/v3/Documentation/learning/lock/client [no test files]
? go.etcd.io/etcd/v3/Documentation/learning/lock/storage [no test files]
ok go.etcd.io/etcd/v3/auth 0.724s
? go.etcd.io/etcd/v3/auth/authpb [no test files]
ok go.etcd.io/etcd/v3/client 0.166s
ok go.etcd.io/etcd/v3/client/integration 0.166s
ok go.etcd.io/etcd/v3/clientv3 3.219s
ok go.etcd.io/etcd/v3/clientv3/balancer 1.102s
? go.etcd.io/etcd/v3/clientv3/balancer/connectivity [no test files]
? go.etcd.io/etcd/v3/clientv3/balancer/picker [no test files]
? go.etcd.io/etcd/v3/clientv3/balancer/resolver/endpoint [no test files]
ok go.etcd.io/etcd/v3/clientv3/clientv3util 0.096s [no tests to run]
ok go.etcd.io/etcd/v3/clientv3/concurrency 3.323s
? go.etcd.io/etcd/v3/clientv3/credentials [no test files]
ok go.etcd.io/etcd/v3/clientv3/integration 0.131s
? go.etcd.io/etcd/v3/clientv3/leasing [no test files]
? go.etcd.io/etcd/v3/clientv3/mirror [no test files]
ok go.etcd.io/etcd/v3/clientv3/namespace 0.041s
ok go.etcd.io/etcd/v3/clientv3/naming 0.115s
ok go.etcd.io/etcd/v3/clientv3/ordering 0.121s
ok go.etcd.io/etcd/v3/clientv3/snapshot 19.325s
ok go.etcd.io/etcd/v3/clientv3/yaml 0.090s
ok go.etcd.io/etcd/v3/contrib/raftexample 7.572s
? go.etcd.io/etcd/v3/contrib/recipes [no test files]
ok go.etcd.io/etcd/v3/embed 0.282s
ok go.etcd.io/etcd/v3/etcdctl 0.054s
? go.etcd.io/etcd/v3/etcdctl/ctlv2 [no test files]
ok go.etcd.io/etcd/v3/etcdctl/ctlv2/command 0.117s
? go.etcd.io/etcd/v3/etcdctl/ctlv3 [no test files]
ok go.etcd.io/etcd/v3/etcdctl/ctlv3/command 0.070s
ok go.etcd.io/etcd/v3/etcdmain 0.172s
ok go.etcd.io/etcd/v3/etcdserver 1.698s
? go.etcd.io/etcd/v3/etcdserver/api [no test files]
ok go.etcd.io/etcd/v3/etcdserver/api/etcdhttp 0.075s
ok go.etcd.io/etcd/v3/etcdserver/api/membership 0.104s
? go.etcd.io/etcd/v3/etcdserver/api/membership/membershippb [no test files]
ok go.etcd.io/etcd/v3/etcdserver/api/rafthttp 0.181s
ok go.etcd.io/etcd/v3/etcdserver/api/snap 0.078s
? go.etcd.io/etcd/v3/etcdserver/api/snap/snappb [no test files]
ok go.etcd.io/etcd/v3/etcdserver/api/v2auth 0.142s
ok go.etcd.io/etcd/v3/etcdserver/api/v2discovery 0.035s
ok go.etcd.io/etcd/v3/etcdserver/api/v2error 0.043s
ok go.etcd.io/etcd/v3/etcdserver/api/v2http 0.070s
ok go.etcd.io/etcd/v3/etcdserver/api/v2http/httptypes 0.031s
? go.etcd.io/etcd/v3/etcdserver/api/v2stats [no test files]
ok go.etcd.io/etcd/v3/etcdserver/api/v2store 0.645s
ok go.etcd.io/etcd/v3/etcdserver/api/v2v3 0.218s
? go.etcd.io/etcd/v3/etcdserver/api/v3alarm [no test files]
? go.etcd.io/etcd/v3/etcdserver/api/v3client [no test files]
ok go.etcd.io/etcd/v3/etcdserver/api/v3compactor 1.765s
? go.etcd.io/etcd/v3/etcdserver/api/v3election [no test files]
? go.etcd.io/etcd/v3/etcdserver/api/v3election/v3electionpb [no test files]
? go.etcd.io/etcd/v3/etcdserver/api/v3election/v3electionpb/gw [no test files]
? go.etcd.io/etcd/v3/etcdserver/api/v3lock [no test files]
? go.etcd.io/etcd/v3/etcdserver/api/v3lock/v3lockpb [no test files]
? go.etcd.io/etcd/v3/etcdserver/api/v3lock/v3lockpb/gw [no test files]
ok go.etcd.io/etcd/v3/etcdserver/api/v3rpc 0.091s
ok go.etcd.io/etcd/v3/etcdserver/api/v3rpc/rpctypes 0.012s
ok go.etcd.io/etcd/v3/etcdserver/cindex 0.054s
ok go.etcd.io/etcd/v3/etcdserver/etcdserverpb 0.039s
? go.etcd.io/etcd/v3/etcdserver/etcdserverpb/gw [no test files]
ok go.etcd.io/etcd/v3/functional/agent 0.094s
? go.etcd.io/etcd/v3/functional/cmd/etcd-agent [no test files]
? go.etcd.io/etcd/v3/functional/cmd/etcd-proxy [no test files]
? go.etcd.io/etcd/v3/functional/cmd/etcd-runner [no test files]
? go.etcd.io/etcd/v3/functional/cmd/etcd-tester [no test files]
ok go.etcd.io/etcd/v3/functional/rpcpb 0.060s
? go.etcd.io/etcd/v3/functional/runner [no test files]
ok go.etcd.io/etcd/v3/functional/tester 0.079s
ok go.etcd.io/etcd/v3/integration 0.684s
ok go.etcd.io/etcd/v3/integration/embed 0.101s
ok go.etcd.io/etcd/v3/lease 3.455s
ok go.etcd.io/etcd/v3/lease/leasehttp 2.185s
? go.etcd.io/etcd/v3/lease/leasepb [no test files]
ok go.etcd.io/etcd/v3/mvcc 7.246s
ok go.etcd.io/etcd/v3/mvcc/backend 0.354s
? go.etcd.io/etcd/v3/mvcc/mvccpb [no test files]
ok go.etcd.io/etcd/v3/pkg/adt 0.025s
? go.etcd.io/etcd/v3/pkg/contention [no test files]
? go.etcd.io/etcd/v3/pkg/cpuutil [no test files]
ok go.etcd.io/etcd/v3/pkg/crc 0.008s
? go.etcd.io/etcd/v3/pkg/debugutil [no test files]
ok go.etcd.io/etcd/v3/pkg/expect 0.015s
ok go.etcd.io/etcd/v3/pkg/fileutil 0.268s
ok go.etcd.io/etcd/v3/pkg/flags 0.021s
ok go.etcd.io/etcd/v3/pkg/httputil 0.020s
ok go.etcd.io/etcd/v3/pkg/idutil 0.008s
ok go.etcd.io/etcd/v3/pkg/ioutil 0.025s
ok go.etcd.io/etcd/v3/pkg/logutil 0.047s
? go.etcd.io/etcd/v3/pkg/mock/mockserver [no test files]
? go.etcd.io/etcd/v3/pkg/mock/mockstorage [no test files]
? go.etcd.io/etcd/v3/pkg/mock/mockstore [no test files]
? go.etcd.io/etcd/v3/pkg/mock/mockwait [no test files]
ok go.etcd.io/etcd/v3/pkg/netutil 1.024s
ok go.etcd.io/etcd/v3/pkg/osutil 0.021s
ok go.etcd.io/etcd/v3/pkg/pathutil 0.008s
ok go.etcd.io/etcd/v3/pkg/pbutil 0.008s
ok go.etcd.io/etcd/v3/pkg/proxy 4.081s
ok go.etcd.io/etcd/v3/pkg/report 0.008s
? go.etcd.io/etcd/v3/pkg/runtime [no test files]
ok go.etcd.io/etcd/v3/pkg/schedule 0.009s
ok go.etcd.io/etcd/v3/pkg/srv 0.019s
ok go.etcd.io/etcd/v3/pkg/stringutil 0.008s
? go.etcd.io/etcd/v3/pkg/systemd [no test files]
ok go.etcd.io/etcd/v3/pkg/testutil 0.023s
ok go.etcd.io/etcd/v3/pkg/tlsutil 3.965s
ok go.etcd.io/etcd/v3/pkg/traceutil 0.034s
ok go.etcd.io/etcd/v3/pkg/transport 0.532s
ok go.etcd.io/etcd/v3/pkg/types 0.028s
ok go.etcd.io/etcd/v3/pkg/wait 0.023s
ok go.etcd.io/etcd/v3/proxy/grpcproxy 0.101s
? go.etcd.io/etcd/v3/proxy/grpcproxy/adapter [no test files]
? go.etcd.io/etcd/v3/proxy/grpcproxy/cache [no test files]
ok go.etcd.io/etcd/v3/proxy/httpproxy 0.044s
ok go.etcd.io/etcd/v3/proxy/tcpproxy 0.047s
ok go.etcd.io/etcd/v3/raft 0.312s
ok go.etcd.io/etcd/v3/raft/confchange 0.183s
ok go.etcd.io/etcd/v3/raft/quorum 0.316s
ok go.etcd.io/etcd/v3/raft/raftpb 0.024s
ok go.etcd.io/etcd/v3/raft/rafttest 0.640s
ok go.etcd.io/etcd/v3/raft/tracker 0.026s
ok go.etcd.io/etcd/v3/tests/e2e 0.077s
? go.etcd.io/etcd/v3/tools/benchmark [no test files]
? go.etcd.io/etcd/v3/tools/benchmark/cmd [no test files]
? go.etcd.io/etcd/v3/tools/etcd-dump-db [no test files]
ok go.etcd.io/etcd/v3/tools/etcd-dump-logs 0.088s
? go.etcd.io/etcd/v3/tools/etcd-dump-metrics [no test files]
? go.etcd.io/etcd/v3/tools/local-tester/bridge [no test files]
? go.etcd.io/etcd/v3/version [no test files]
ok go.etcd.io/etcd/v3/wal 1.517s
? go.etcd.io/etcd/v3/wal/walpb [no test files]
go test --short ./... --count=1 76.12s user 12.57s system 375% cpu 23.635 total
```
