From b3681c4cd34e6e2e4519910c612711436d27f5fc Mon Sep 17 00:00:00 2001
From: Milos Gajdos <milosthegajdos@gmail.com>
Date: Wed, 29 Nov 2023 21:40:20 +0000
Subject: [PATCH] feat: add tparallel linter to improve handling parallel tests

This linter both prevents parallel test races as well as
suggests parallel tests where appropriate:
See: https://github.com/moricho/tparallel

Signed-off-by: Milos Gajdos <milosthegajdos@gmail.com>
---
 .golangci.yml                          | 1 +
 internal/dcontext/trace_test.go        | 2 +-
 registry/storage/driver/errors_test.go | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/.golangci.yml b/.golangci.yml
index a6dfe5ca..ec637d63 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -12,6 +12,7 @@ linters:
     - bodyclose
     - prealloc
     - errcheck
+    - tparallel
 
 linters-settings:
   revive:
diff --git a/internal/dcontext/trace_test.go b/internal/dcontext/trace_test.go
index bb6d1779..719fa37b 100644
--- a/internal/dcontext/trace_test.go
+++ b/internal/dcontext/trace_test.go
@@ -34,7 +34,7 @@ func TestWithTrace(t *testing.T) {
 	}
 
 	ctx, done := WithTrace(Background())
-	defer done("this will be emitted at end of test")
+	t.Cleanup(func() { done("this will be emitted at end of test") })
 
 	tests := append(base, valueTestCase{
 		key:      "trace.func",
diff --git a/registry/storage/driver/errors_test.go b/registry/storage/driver/errors_test.go
index f692466f..5831dd98 100644
--- a/registry/storage/driver/errors_test.go
+++ b/registry/storage/driver/errors_test.go
@@ -33,6 +33,7 @@ func TestErrorFormat(t *testing.T) {
 }
 
 func TestErrors(t *testing.T) {
+	t.Parallel()
 	drvName := "foo"
 
 	testCases := []struct {