51 lines
1.2 KiB
HTML
51 lines
1.2 KiB
HTML
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<!doctype html>
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link rel="stylesheet" href="../lib/3rdparty/highlight/styles/default.css">
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<link rel="stylesheet" href="../css/doctest.css">
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<script src="../lib/3rdparty/highlight/highlight.pack.js"></script>
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<script src="all.js"></script>
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</head>
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<body onload="Doctest.run()" >
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<h1>
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Interfaces
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</h1>
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<p>
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Interfaces are objects that specify (document) the external behavior of objects
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that “provide” them. An interface specifies behavior through method definitions
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that specify functions and their signatures.
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</p>
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<p>Let's look at an example of an interface and a class implementing the interface:</p>
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<script class="doctest">
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class ITestable extends Interface {
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reset() {}
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run() {}
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}
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class Testable {
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reset() {
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print("Resetting testable object")
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}
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run() {
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print("Running testable object")
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}
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}
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</script>
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<p>We can now check whether the promised interface methods are implemented by the
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class:</p>
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<script class="doctest">
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Doctest.expect(ITestable.implementedBy(Testable), true)
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</script>
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<p>
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<h2>
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References
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</h2>
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<ul>
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<li><a href="https://zopeinterface.readthedocs.io">Zope Interfaces</a></li>
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</ul>
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</body>
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