/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */ import { mainMetric } from '../../src' ; describe ( 'mainMetric' , ( ) => { it ( 'is null when no options' , ( ) => { expect ( mainMetric ( [ ] ) ) . toBeUndefined ( ) ; expect ( mainMetric ( null ) ) . toBeUndefined ( ) ; } ) ; it ( 'prefers the "count" metric when first' , ( ) => { const metrics = [ { metric_name : 'count' } , { metric_name : 'foo' } ] ; expect ( mainMetric ( metrics ) ) . toBe ( 'count' ) ; } ) ; it ( 'prefers the "count" metric when not first' , ( ) => { const metrics = [ { metric_name : 'foo' } , { metric_name : 'count' } ] ; expect ( mainMetric ( metrics ) ) . toBe ( 'count' ) ; } ) ; it ( 'selects the first metric when "count" is not an option' , ( ) => { const metrics = [ { metric_name : 'foo' } , { metric_name : 'not_count' } ] ; expect ( mainMetric ( metrics ) ) . toBe ( 'foo' ) ; } ) ; } ) ;