Add test to ensure the StopChannelContext works properly

lib/stop_context_test.go

@@ -0,0 +1,36 @@
+package lib
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestStopChannelContext(t *testing.T) {
+	ch := make(chan struct{})
+
+	ctx := StopChannelContext{StopCh: ch}
+
+	select {
+	case <-ctx.Done():
+		require.FailNow(t, "StopChannelContext should not be done yet")
+	default:
+		// do nothing things are good
+	}
+
+	close(ch)
+
+	select {
+	case <-ctx.Done():
+		// things are good, as we are done
+	default:
+		require.FailNow(t, "StopChannelContext should be done")
+	}
+
+	// issue it twice to ensure that we indefinitely return the
+	// same value - this is what the context interface says is
+	// the correct behavior.
+	require.Equal(t, context.Canceled, ctx.Err())
+	require.Equal(t, context.Canceled, ctx.Err())
+}