go/analysis/passes/copylock: enable unfortunate tests

CL 628435 moved and disabled these tests. This CL re-enables them for
the time when CL 627777 lands.

Change-Id: I16cb8d4c23db35fadaac94054183f26bba2449e2
Reviewed-on: https://go-review.googlesource.com/c/tools/+/629235
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Tim King <taking@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>

go/analysis/passes/copylock/copylock_test.go

@@ -16,11 +16,7 @@ import (
 
 func Test(t *testing.T) {
 	testdata := analysistest.TestData()
-	// TODO(mknyszek): Add "unfortunate" package once CL 627777 lands. That CL changes
-	// the internals of the sync package structures to carry an explicit noCopy to prevent
-	// problems from changes to the implementations of those structures, such as these
-	// tests failing, or a bad user experience.
-	analysistest.Run(t, testdata, copylock.Analyzer, "a", "typeparams", "issue67787")
+	analysistest.Run(t, testdata, copylock.Analyzer, "a", "typeparams", "issue67787", "unfortunate")
 }
 
 func TestVersions22(t *testing.T) {

go/analysis/passes/copylock/testdata/src/unfortunate/local_go123.go

@@ -15,7 +15,7 @@ import "sync"
 // sync.Mutex gets called out, but without any reference to the sync.Once.
 type LocalOnce sync.Once
 
-func (LocalOnce) Bad() {} // want `Bad passes lock by value: a.LocalOnce contains sync.\b.*`
+func (LocalOnce) Bad() {} // want `Bad passes lock by value: unfortunate.LocalOnce contains sync.\b.*`
 
 // False negative:
 // LocalMutex doesn't have a Lock method.

go/analysis/passes/copylock/testdata/src/unfortunate/local_go124.go

@@ -12,8 +12,8 @@ import "sync"
 
 type LocalOnce sync.Once
 
-func (LocalOnce) Bad() {} // want "Bad passes lock by value: a.LocalOnce contains sync.noCopy"
+func (LocalOnce) Bad() {} // want "Bad passes lock by value: unfortunate.LocalOnce contains sync.noCopy"
 
 type LocalMutex sync.Mutex
 
-func (LocalMutex) Bad() {} // want "Bad passes lock by value: a.LocalMutex contains sync.noCopy"
+func (LocalMutex) Bad() {} // want "Bad passes lock by value: unfortunate.LocalMutex contains sync.noCopy"