31 lines
1.1 KiB
Swift
31 lines
1.1 KiB
Swift
// Copyright 2020 Carton contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import Foundation
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public struct ExpectationError: Error, CustomStringConvertible {
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public let description: String
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}
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/** Implements throwing equality assertions, as compared to standard assertions that trap
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in debug mode.
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*/
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struct Equality<T: Equatable, C> {
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let description: (_ x: T, _ y: T, _ context: C) -> String
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func callAsFunction(_ x: T, _ y: T, context: C) throws {
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guard x == y else { throw ExpectationError(description: description(x, y, context)) }
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}
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}
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