69 lines
2.0 KiB
TypeScript
69 lines
2.0 KiB
TypeScript
/**
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* Tests error context
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*
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* Copyright (C) 2010-2019 R-T Specialty, LLC.
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*
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* This file is part of the Liza Data Collection Framework.
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*
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* liza is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import * as sut from "../../src/error/ContextError";
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import { expect } from 'chai';
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describe( 'ContextError', () =>
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{
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it( "can be created with generic error", () =>
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{
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const context = { foo: "context" };
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expect( sut.context( new Error( "test error" ), context ).context )
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.to.equal( context );
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} );
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it( "provides type predicate for TypeScript", () =>
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{
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const context = { bar: "baz context" };
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// force to Error to discard ContextError type
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const e: Error = sut.context( new Error( "test error" ), context );
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if ( sut.hasContext( e ) )
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{
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// if isChained was properly defined, then outer should now
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// have type ChainedError, and so this should compile
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expect( e.context ).to.equal( context );
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}
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else
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{
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expect.fail();
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}
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} );
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it( "can create typed contexts", () =>
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{
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type FooErrorContext = { foo: string };
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// this is the actual test
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const e: sut.ContextError<FooErrorContext> =
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sut.context( new Error( "test error" ), { foo: "context" } );
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// contravariance check (would fail to compile)
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expect( sut.hasContext( e ) ).to.be.true;
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} );
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} );
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