46 lines
1.9 KiB
JavaScript
46 lines
1.9 KiB
JavaScript
var CustomError = require('../index');
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// define a custom error with a default message
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var Parent = CustomError('ParentError', { message: 'Parent error' });
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// define a custom error that inherits from the Parent custom error
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var Child = CustomError('ChildError', Parent, { message: 'Child error' });
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var e;
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// create an error instance that uses defaults
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e = Parent();
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console.log(e.toString()); // "ParentError: Parent error"
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console.log(e.message); // "Parent error"
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console.log(e.name); // "ParentError"
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console.log(e.constructor.name); // "ParentError"
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console.log(e instanceof Parent); // true
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console.log(e instanceof Error); // true
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// create an error instance that overwrites the default message
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e = Parent('Hello');
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console.log(e.toString()); // "ParentError: Hello"
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console.log(e.message); // "Hello"
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console.log(e.name); // "ParentError"
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console.log(e.constructor.name); // "ParentError"
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console.log(e instanceof Parent); // true
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console.log(e instanceof Error); // true
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// create an error instance that overwrites the default message and defines a code
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e = Parent({ message: 'Hello', code: 'XYZ' });
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console.log(e.toString()); // "ParentError XYZ: Hello"
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console.log(e.message); // "Hello"
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console.log(e.name); // "ParentError"
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console.log(e.constructor.name); // "ParentError"
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console.log(e instanceof Parent); // true
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console.log(e instanceof Error); // true
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// create an error instance of the Child custom error
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e = Child();
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console.log(e.toString()); // "ParentError: Child error"
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console.log(e.message); // "Child error"
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console.log(e.name); // "ChildError"
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console.log(e.constructor.name); // "ChildError"
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console.log(e instanceof Child); // true
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console.log(e instanceof Parent); // true
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console.log(e instanceof Error); // true
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