68 lines
2.0 KiB
TypeScript
68 lines
2.0 KiB
TypeScript
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/**
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* Tests error chaining
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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/ChainedError";
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import { expect } from 'chai';
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describe( 'ChainedError', () =>
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{
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it( "can be created with generic error", () =>
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{
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const eprev = new Error( "previous error" );
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expect( sut.chain( new Error( "new error" ), eprev ).chain )
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.to.equal( eprev );
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} );
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it( "can be chained to arbitrary depth", () =>
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{
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const e1 = new Error( "lower" );
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const e2 = sut.chain( new Error( "mid" ), e1 );
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const e3 = sut.chain( new Error( "outer" ), e2 );
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expect( sut.isChained( e3 ) ).to.be.true;
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expect( sut.isChained( e2 ) ).to.be.true;
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expect( sut.isChained( e1 ) ).to.be.false;
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} );
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it( "provides type predicate for TypeScript", () =>
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{
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const inner = new Error( "inner" );
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// force to Error to discard ChainedError type
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const outer: Error = sut.chain( new Error( "outer" ), inner );
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if ( sut.isChained( outer ) )
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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( outer.chain ).to.equal( inner );
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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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} );
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