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Java example source code file (test_pretty.clj)

This example Java source code file (test_pretty.clj) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

delay@, faulhaber, foo, future@, list, list\n, promise@, that, the, this, tom, usage

The test_pretty.clj Java example source code

;;; test_pretty.clj -- part of the pretty printer for Clojure

;   Copyright (c) Rich Hickey. All rights reserved.
;   The use and distribution terms for this software are covered by the
;   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
;   which can be found in the file epl-v10.html at the root of this distribution.
;   By using this software in any fashion, you are agreeing to be bound by
;   the terms of this license.
;   You must not remove this notice, or any other, from this software.

;; Author: Tom Faulhaber
;; April 3, 2009


(in-ns 'clojure.test-clojure.pprint)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; Unit tests for the pretty printer
;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(simple-tests xp-fill-test
  (binding [*print-pprint-dispatch* simple-dispatch
            *print-right-margin* 38
            *print-miser-width* nil]
    (cl-format nil "(let ~:<~@{~:<~w ~_~w~:>~^ ~:_~}~:>~_ ...)~%"
               '((x 4) (*print-length* nil) (z 2) (list nil))))
  "(let ((x 4) (*print-length* nil)\n      (z 2) (list nil))\n ...)\n"

  (binding [*print-pprint-dispatch* simple-dispatch
            *print-right-margin* 22]
    (cl-format nil "(let ~:<~@{~:<~w ~_~w~:>~^ ~:_~}~:>~_ ...)~%"
               '((x 4) (*print-length* nil) (z 2) (list nil))))
  "(let ((x 4)\n      (*print-length*\n       nil)\n      (z 2)\n      (list nil))\n ...)\n")

(simple-tests xp-miser-test
  (binding [*print-pprint-dispatch* simple-dispatch
            *print-right-margin* 10, *print-miser-width* 9]
    (cl-format nil "~:<LIST ~@_~W ~@_~W ~@_~W~:>" '(first second third)))
  "(LIST\n first\n second\n third)"

  (binding [*print-pprint-dispatch* simple-dispatch
            *print-right-margin* 10, *print-miser-width* 8]
    (cl-format nil "~:<LIST ~@_~W ~@_~W ~@_~W~:>" '(first second third)))
  "(LIST first second third)")

(simple-tests mandatory-fill-test
  (cl-format nil
             "<pre>~%~~%
~%" [ "hello" "gooodbye" ]) "<pre> Usage: *hello* *gooodbye* </pre> ") (simple-tests prefix-suffix-test (binding [*print-pprint-dispatch* simple-dispatch *print-right-margin* 10, *print-miser-width* 10] (cl-format nil "~<{~;LIST ~@_~W ~@_~W ~@_~W~;}~:>" '(first second third))) "{LIST\n first\n second\n third}") (defprotocol Foo (foo-you [this])) (simple-tests pprint-test (binding [*print-pprint-dispatch* simple-dispatch] (write '(defn foo [x y] (let [result (* x y)] (if (> result 400) (cl-format true "That number is too big") (cl-format true "The result of ~d x ~d is ~d" x y result)))) :stream nil)) "(defn foo [x y] (let [result (* x y)] (if (> result 400) (cl-format true \"That number is too big\") (cl-format true \"The result of ~d x ~d is ~d\" x y result))))" (with-pprint-dispatch code-dispatch (write '(defn foo [x y] (let [result (* x y)] (if (> result 400) (cl-format true "That number is too big") (cl-format true "The result of ~d x ~d is ~d" x y result)))) :stream nil)) "(defn foo [x y] (let [result (* x y)] (if (> result 400) (cl-format true \"That number is too big\") (cl-format true \"The result of ~d x ~d is ~d\" x y result))))" (binding [*print-pprint-dispatch* simple-dispatch *print-right-margin* 15] (write '(fn (cons (car x) (cdr y))) :stream nil)) "(fn\n (cons\n (car x)\n (cdr y)))" (with-pprint-dispatch code-dispatch (binding [*print-right-margin* 52] (write '(add-to-buffer this (make-buffer-blob (str (char c)) nil)) :stream nil))) "(add-to-buffer\n this\n (make-buffer-blob (str (char c)) nil))" (binding [*print-pprint-dispatch* simple-dispatch] (write (var Foo) :stream nil)) "#'clojure.test-clojure.pprint/Foo" ) (simple-tests pprint-reader-macro-test (with-pprint-dispatch code-dispatch (write (read-string "(map #(first %) [[1 2 3] [4 5 6] [7]])") :stream nil)) "(map #(first %) [[1 2 3] [4 5 6] [7]])" (with-pprint-dispatch code-dispatch (write (read-string "@@(ref (ref 1))") :stream nil)) "@@(ref (ref 1))" (with-pprint-dispatch code-dispatch (write (read-string "'foo") :stream nil)) "'foo" ) (defmacro code-block "Read a string then print it with code-dispatch and succeed if it comes out the same" [test-name & blocks] `(simple-tests ~test-name ~@(apply concat (for [block blocks] `[(str/split-lines (with-out-str (with-pprint-dispatch code-dispatch (pprint (read-string ~block))))) (str/split-lines ~block)])))) (code-block code-block-tests "(defn cl-format \"An implementation of a Common Lisp compatible format function\" [stream format-in & args] (let [compiled-format (if (string? format-in) (compile-format format-in) format-in) navigator (init-navigator args)] (execute-format stream compiled-format navigator)))" "(defn pprint-defn [writer alis] (if (next alis) (let [[defn-sym defn-name & stuff] alis [doc-str stuff] (if (string? (first stuff)) [(first stuff) (next stuff)] [nil stuff]) [attr-map stuff] (if (map? (first stuff)) [(first stuff) (next stuff)] [nil stuff])] (pprint-logical-block writer :prefix \"(\" :suffix \")\" (cl-format true \"~w ~1I~@_~w\" defn-sym defn-name) (if doc-str (cl-format true \" ~_~w\" doc-str)) (if attr-map (cl-format true \" ~_~w\" attr-map)) (cond (vector? (first stuff)) (single-defn stuff (or doc-str attr-map)) :else (multi-defn stuff (or doc-str attr-map))))) (pprint-simple-code-list writer alis)))") (code-block ns-macro-test "(ns foobarbaz)" "(ns slam.hound.stitch (:use [slam.hound.prettify :only [prettify]]))" "(ns slam.hound.prettify \"Format a namespace declaration using pretty print with custom dispatch.\" (:use [clojure.pprint :only [cl-format code-dispatch formatter-out pprint pprint-logical-block pprint-newline with-pprint-dispatch write-out]]))" "(ns autodoc.build-html \"This is the namespace that builds the HTML pages themselves. It is implemented with a number of custom enlive templates.\" {:skip-wiki true, :author \"Tom Faulhaber\"} (:refer-clojure :exclude [empty complement]) (:import [java.util.jar JarFile] [java.io File FileWriter BufferedWriter StringReader BufferedInputStream BufferedOutputStream ByteArrayOutputStream FileReader FileInputStream] [java.util.regex Pattern]) (:require [clojure.string :as str]) (:use [net.cgrand.enlive-html :exclude (deftemplate)] [clojure.java.io :only (as-file file writer)] [clojure.java.shell :only (sh)] [clojure.pprint :only (pprint cl-format pprint-ident pprint-logical-block set-pprint-dispatch get-pretty-writer fresh-line)] [clojure.data.json :only (pprint-json)] [autodoc.collect-info :only (contrib-info)] [autodoc.params :only (params expand-classpath)]) (:use clojure.set clojure.java.io clojure.data clojure.java.browse clojure.inspector clojure.zip clojure.stacktrace))") (defn tst-pprint "A helper function to pprint to a string with a restricted right margin" [right-margin obj] (binding [*print-right-margin* right-margin *print-pretty* true] (write obj :stream nil))) ;;; A bunch of predefined data to print (def future-filled (future-call (fn [] 100))) @future-filled (def future-unfilled (future-call (fn [] (.acquire (java.util.concurrent.Semaphore. 0))))) (def promise-filled (promise)) (deliver promise-filled '(first second third)) (def promise-unfilled (promise)) (def basic-agent (agent '(first second third))) (def basic-atom (atom '(first second third))) (def basic-ref (ref '(first second third))) (def delay-forced (delay '(first second third))) (force delay-forced) (def delay-unforced (delay '(first second third))) (defrecord pprint-test-rec [a b c]) (simple-tests pprint-datastructures-tests (tst-pprint 20 future-filled) #"#<Future@[0-9a-f]+: \r?\n 100>" (tst-pprint 20 future-unfilled) #"#<Future@[0-9a-f]+: \r?\n :pending>" (tst-pprint 20 promise-filled) #"#<Promise@[0-9a-f]+: \r?\n \(first\r?\n second\r?\n third\)>" ;; This hangs currently, cause we can't figure out whether a promise is filled ;;(tst-pprint 20 promise-unfilled) #"#<Promise@[0-9a-f]+: \r?\n :pending>" (tst-pprint 20 basic-agent) #"#<Agent@[0-9a-f]+: \r?\n \(first\r?\n second\r?\n third\)>" (tst-pprint 20 basic-atom) #"#<Atom@[0-9a-f]+: \r?\n \(first\r?\n second\r?\n third\r?\)>" (tst-pprint 20 basic-ref) #"#<Ref@[0-9a-f]+: \r?\n \(first\r?\n second\r?\n third\)>" (tst-pprint 20 delay-forced) #"#<Delay@[0-9a-f]+: \r?\n \(first\r?\n second\r?\n third\)>" ;; Currently no way not to force the delay ;;(tst-pprint 20 delay-unforced) #"#<Delay@[0-9a-f]+: \n :pending>" (tst-pprint 20 (pprint-test-rec. 'first 'second 'third)) "{:a first,\n :b second,\n :c third}" ;; basic java arrays: fails owing to assembla ticket #346 ;;(tst-pprint 10 (int-array (range 7))) "[0,\n 1,\n 2,\n 3,\n 4,\n 5,\n 6]" (tst-pprint 15 (reduce conj clojure.lang.PersistentQueue/EMPTY (range 10))) "<-(0\n 1\n 2\n 3\n 4\n 5\n 6\n 7\n 8\n 9)-<" ) ;;; Some simple tests of dispatch (defmulti test-dispatch "A test dispatch method" {:added "1.2" :arglists '[[object]]} #(and (seq %) (not (string? %)))) (defmethod test-dispatch true [avec] (pprint-logical-block :prefix "[" :suffix "]" (loop [aseq (seq avec)] (when aseq (write-out (first aseq)) (when (next aseq) (.write ^java.io.Writer *out* " ") (pprint-newline :linear) (recur (next aseq))))))) (defmethod test-dispatch false [aval] (pr aval)) (simple-tests dispatch-tests (with-pprint-dispatch test-dispatch (with-out-str (pprint '("hello" "there")))) "[\"hello\" \"there\"]\n" ) (simple-tests print-length-tests (binding [*print-length* 1] (with-out-str (pprint '(a b c d e f)))) "(a ...)\n" (binding [*print-length* 2] (with-out-str (pprint '(a b c d e f)))) "(a b ...)\n" (binding [*print-length* 6] (with-out-str (pprint '(a b c d e f)))) "(a b c d e f)\n" (binding [*print-length* 8] (with-out-str (pprint '(a b c d e f)))) "(a b c d e f)\n" (binding [*print-length* 1] (with-out-str (pprint [1 2 3 4 5 6]))) "[1 ...]\n" (binding [*print-length* 2] (with-out-str (pprint [1 2 3 4 5 6]))) "[1 2 ...]\n" (binding [*print-length* 6] (with-out-str (pprint [1 2 3 4 5 6]))) "[1 2 3 4 5 6]\n" (binding [*print-length* 8] (with-out-str (pprint [1 2 3 4 5 6]))) "[1 2 3 4 5 6]\n" (binding [*print-length* 1] (with-out-str (pprint (sorted-set 1 2 3 4 5 6)))) "#{1 ...}\n" (binding [*print-length* 2] (with-out-str (pprint (sorted-set 1 2 3 4 5 6)))) "#{1 2 ...}\n" (binding [*print-length* 6] (with-out-str (pprint (sorted-set 1 2 3 4 5 6)))) "#{1 2 3 4 5 6}\n" (binding [*print-length* 8] (with-out-str (pprint (sorted-set 1 2 3 4 5 6)))) "#{1 2 3 4 5 6}\n" (binding [*print-length* 1] (with-out-str (pprint (sorted-map 1 2, 3 4, 5 6, 7 8, 9 10, 11 12)))) "{1 2, ...}\n" (binding [*print-length* 2] (with-out-str (pprint (sorted-map 1 2, 3 4, 5 6, 7 8, 9 10, 11 12)))) "{1 2, 3 4, ...}\n" (binding [*print-length* 6] (with-out-str (pprint (sorted-map 1 2, 3 4, 5 6, 7 8, 9 10, 11 12)))) "{1 2, 3 4, 5 6, 7 8, 9 10, 11 12}\n" (binding [*print-length* 8] (with-out-str (pprint (sorted-map 1 2, 3 4, 5 6, 7 8, 9 10, 11 12)))) "{1 2, 3 4, 5 6, 7 8, 9 10, 11 12}\n" (binding [*print-length* 1] (with-out-str (pprint (int-array [1 2 3 4 5 6])))) "[1, ...]\n" (binding [*print-length* 2] (with-out-str (pprint (int-array [1 2 3 4 5 6])))) "[1, 2, ...]\n" (binding [*print-length* 6] (with-out-str (pprint (int-array [1 2 3 4 5 6])))) "[1, 2, 3, 4, 5, 6]\n" (binding [*print-length* 8] (with-out-str (pprint (int-array [1 2 3 4 5 6])))) "[1, 2, 3, 4, 5, 6]\n" ) (defn- flush-alerting-writer [o] (let [flush-count-atom (atom 0)] [ (proxy [java.io.BufferedWriter] [o] (flush [] (proxy-super flush) (swap! flush-count-atom inc))) flush-count-atom])) (deftest test-flush-underlying-prn [] (let [[out flush-count-atom] (flush-alerting-writer (java.io.StringWriter.))] (binding [*out* out *flush-on-newline* true] (prn (range 50)) (prn (range 50))) (is (= @flush-count-atom 2) "println flushes on newline"))) (deftest test-flush-underlying-pprint [] (let [[out flush-count-atom] (flush-alerting-writer (java.io.StringWriter.))] (binding [*out* out *flush-on-newline* true] (pprint (range 50)) (pprint (range 50))) (is (= @flush-count-atom 2) "pprint flushes on newline"))) (deftest test-noflush-underlying-prn [] (let [[out flush-count-atom] (flush-alerting-writer (java.io.StringWriter.))] (binding [*out* out *flush-on-newline* nil] (prn (range 50)) (prn (range 50))) (is (= @flush-count-atom 0) "println flushes on newline"))) (deftest test-noflush-underlying-pprint [] (let [[out flush-count-atom] (flush-alerting-writer (java.io.StringWriter.))] (binding [*out* out *flush-on-newline* nil] (pprint (range 50)) (pprint (range 50))) (is (= @flush-count-atom 0) "pprint flushes on newline"))) (deftest test-pprint-calendar (let [calendar (doto (java.util.GregorianCalendar. 2014 3 29 14 0 0) (.setTimeZone (java.util.TimeZone/getTimeZone "GMT"))) calendar-str (with-out-str (pprint calendar))] (is (= (str/split-lines calendar-str) ["#inst \"2014-04-29T14:00:00.000+00:00\""]) "calendar object pretty prints")))

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