1 /*
2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.tools.flicker.assertions
18 
19 /** A string key-value pair in a failure message, such as "expected: abc" or "but was: xyz." */
20 data class Fact(val key: String, val value: Any? = null) {
21     internal val isEmpty = key.isEmpty()
22 
toStringnull23     override fun toString(): String {
24         val valueStr = value?.toString() ?: ""
25         return if (valueStr.isEmpty()) key else "$key: $valueStr"
26     }
27 
28     companion object {
29         internal val EMPTY = Fact(key = "")
30     }
31 }
32