66 lines
2.5 KiB
Common Lisp
66 lines
2.5 KiB
Common Lisp
;;; Copyright 2013 Google Inc.
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;;;
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;;; Licensed under the Apache License, Version 2.0 (the "License");
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;;; you may not use this file except in compliance with the License.
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;;; You may obtain a copy of the License at
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;;;
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;;; http://www.apache.org/licenses/LICENSE-2.0
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;;;
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;;; Unless required by applicable law or agreed to in writing, software
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;;; distributed under the License is distributed on an "AS IS" BASIS,
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;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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;;; See the License for the specific language governing permissions and
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;;; limitations under the License.
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;;; ╭╮ ╭╮ ///////
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;;; ┃┃ ┃┃///////
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;;; ┃┃╭┳━━┳━━╮ ┃┃╭┳━━┳━━┳━╮╭━━╮
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;;; ┃┃┣┫━━┫╭╮┃ ┃╰╯┫╭╮┃╭╮┃╭╮┫━━┫
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;;; ┃╰┫┣━━┃╰╯┃ ┃╭╮┫╰╯┃╭╮┃┃┃┣━━┃
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;;; ╰━┻┻━━┫╭━╯/╰╯╰┻━━┻╯╰┻╯╰┻━━╯
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;;; ┃┃ //////
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;;; ╰╯//////
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;;; Welcome to the Lisp Koans.
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;;; May the code stored here influence your enlightenment as a programmer.
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;;; In order to progress, fill in the blanks, denoted via ____ in source code.
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;;; Sometimes, you will be asked to provide values that are equal to something.
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(define-test fill-in-the-blanks
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(assert-equal 2 2)
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(assert-equal 3.14 3.14)
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(assert-equal "Hello World" "Hello World"))
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;;; Sometimes, you will be asked to say whether something is true or false,
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;;; In Common Lisp, the canonical values for truth and falsehood are T and NIL.
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(define-test assert-true
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(assert-true t))
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(define-test assert-false
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(assert-false nil))
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(define-test true-or-false
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(true-or-false? t (= 34 34))
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(true-or-false? nil (= 19 78)))
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;;; Since T and NIL are symbols, you can type them in lowercase or uppercase;
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;;; by default, Common Lisp will automatically upcase them upon reading.
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(define-test upcase-downcase
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;; Try inserting a lowercase t here.
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(assert-equal t T)
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;; Try inserting an uppercase NIL here.
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(assert-equal NIL nil))
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;;; Sometimes, you will be asked to provide a part of an expression that must be
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;;; either true or false.
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(define-test a-true-assertion
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(assert-true (= 4 (+ 2 2))))
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(define-test a-false-assertion
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(assert-false (= 5 (+ 2 2))))
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