CloudWatch: Log group variable should get all log groups (#54062)

pkg/tsdb/cloudwatch/utils_test.go

@@ -23,9 +23,11 @@ type fakeCWLogsClient struct {
 
 	calls logsQueryCalls
 
-	logGroups      cloudwatchlogs.DescribeLogGroupsOutput
+	logGroups      []cloudwatchlogs.DescribeLogGroupsOutput
 	logGroupFields cloudwatchlogs.GetLogGroupFieldsOutput
 	queryResults   cloudwatchlogs.GetQueryResultsOutput
+
+	logGroupsIndex int
 }
 
 type logsQueryCalls struct {
@@ -52,7 +54,9 @@ func (m *fakeCWLogsClient) StopQueryWithContext(ctx context.Context, input *clou
 }
 
 func (m *fakeCWLogsClient) DescribeLogGroupsWithContext(ctx context.Context, input *cloudwatchlogs.DescribeLogGroupsInput, option ...request.Option) (*cloudwatchlogs.DescribeLogGroupsOutput, error) {
-	return &m.logGroups, nil
+	output := &m.logGroups[m.logGroupsIndex]
+	m.logGroupsIndex++
+	return output, nil
 }
 
 func (m *fakeCWLogsClient) GetLogGroupFieldsWithContext(ctx context.Context, input *cloudwatchlogs.GetLogGroupFieldsInput, option ...request.Option) (*cloudwatchlogs.GetLogGroupFieldsOutput, error) {