From 2b7aade1b543df66a244f322cdb55a6e7defe337 Mon Sep 17 00:00:00 2001
From: Curtis Robert <crobert@splunk.com>
Date: Mon, 29 Jan 2024 00:41:46 -0800
Subject: [PATCH] [chore][processor/cumulativetodeltaprocessor] Enable goleak
 check (#30804)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
This enables the `goleak` check on all tests in this package, to ensure
the processor isn't leaking goroutines. The only update here is in
testing, as one test was missing a necessary `shutdown` call.

**Link to tracking Issue:** <Issue number if applicable>
#30438

**Testing:** <Describe what testing was performed and which tests were
added.>
All tests are passing, including added `goleak` check.
---
 .../cumulativetodeltaprocessor/factory_test.go  |  1 +
 .../cumulativetodeltaprocessor/package_test.go  | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 processor/cumulativetodeltaprocessor/package_test.go

diff --git a/processor/cumulativetodeltaprocessor/factory_test.go b/processor/cumulativetodeltaprocessor/factory_test.go
index 1a5fc624d80d..109244f970d9 100644
--- a/processor/cumulativetodeltaprocessor/factory_test.go
+++ b/processor/cumulativetodeltaprocessor/factory_test.go
@@ -62,6 +62,7 @@ func TestCreateProcessors(t *testing.T) {
 				consumertest.NewNop())
 			assert.NotNil(t, mp)
 			assert.NoError(t, mErr)
+			assert.NoError(t, mp.Shutdown(context.Background()))
 		})
 	}
 }
diff --git a/processor/cumulativetodeltaprocessor/package_test.go b/processor/cumulativetodeltaprocessor/package_test.go
new file mode 100644
index 000000000000..00a5411fe5cc
--- /dev/null
+++ b/processor/cumulativetodeltaprocessor/package_test.go
@@ -0,0 +1,17 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package cumulativetodeltaprocessor
+
+import (
+	"testing"
+
+	"go.uber.org/goleak"
+)
+
+// The IgnoreTopFunction call prevents catching the leak generated by opencensus
+// defaultWorker.Start which at this time is part of the package's init call.
+// See https://github.com/census-instrumentation/opencensus-go/issues/1191 for more information.
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m, goleak.IgnoreTopFunction("go.opencensus.io/stats/view.(*worker).start"))
+}