84 lines
1.9 KiB
Hy
84 lines
1.9 KiB
Hy
;; Copyright 2017 the authors.
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;; This file is part of Hy, which is free software licensed under the Expat
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;; license. See the LICENSE.
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(import [functools [wraps]])
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(defn test-tag-macro []
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"Test a basic tag macro"
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(deftag ^ [expr]
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expr)
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(assert (= #^"works" "works")))
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(defn test-tag-macro-expr []
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"Test basic exprs like lists and arrays"
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(deftag n [expr]
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(get expr 1))
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(assert (= #n[1 2] 2))
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(assert (= #n(1 2) 2)))
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(defn test-tag-macro-override []
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"Test if we can override function symbols"
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(deftag + [n]
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(+ n 1))
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(assert (= #+2 3)))
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(defn test-tag-macros-macros []
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"Test if deftag is actually a macro"
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(deftag t [expr]
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`(, ~@expr))
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(def a #t[1 2 3])
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(assert (= (type a) tuple))
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(assert (= (, 1 2 3) a)))
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(defn test-tag-macro-string-name []
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"Test if deftag accepts a string as a macro name."
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(deftag "." [expr]
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expr)
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(assert (= #."works" "works")))
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(defn test-builtin-decorator-tag []
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(defn increment-arguments [func]
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"Increments each argument passed to the decorated function."
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((wraps func)
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(fn [&rest args &kwargs kwargs]
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(apply func
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(map inc args)
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(dict-comp k (inc v) [[k v] (.items kwargs)])))))
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#@(increment-arguments
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(defn foo [&rest args &kwargs kwargs]
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"Bar."
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(, args kwargs)))
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;; The decorator did what it was supposed to
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(assert (= (, (, 2 3 4) {"quux" 5 "baz" 6})
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(foo 1 2 3 :quux 4 :baz 5)))
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;; @wraps preserved the docstring and __name__
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(assert (= "foo" (. foo --name--)))
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(assert (= "Bar." (. foo --doc--)))
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;; We can use the #@ tag macro to apply more than one decorator
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#@(increment-arguments
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increment-arguments
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(defn double-foo [&rest args &kwargs kwargs]
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"Bar."
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(, args kwargs)))
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(assert (= (, (, 3 4 5) {"quux" 6 "baz" 7})
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(double-foo 1 2 3 :quux 4 :baz 5))))
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