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; 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.
;
;; clojure.test-helper
;;
;; Utility functions shared by various tests in the Clojure
;; test suite
;;
;; tomfaulhaber (gmail)
;; Created 04 November 2010
(ns clojure.test-helper
(:use clojure.test))
(let [nl (System/getProperty "line.separator")]
(defn platform-newlines [s] (.replace s "\n" nl)))
(defn temp-ns
"Create and return a temporary ns, using clojure.core + uses"
[& uses]
(binding [*ns* *ns*]
(in-ns (gensym))
(apply clojure.core/use 'clojure.core uses)
*ns*))
(defmacro eval-in-temp-ns [& forms]
`(binding [*ns* *ns*]
(in-ns (gensym))
(clojure.core/use 'clojure.core)
(eval
'(do ~@forms))))
(defn causes
[^Throwable throwable]
(loop [causes []
t throwable]
(if t (recur (conj causes t) (.getCause t)) causes)))
;; this is how I wish clojure.test/thrown? worked...
;; Does body throw expected exception, anywhere in the .getCause chain?
(defmethod assert-expr 'fails-with-cause?
[msg [_ exception-class msg-re & body :as form]]
`(try
~@body
(report {:type :fail, :message ~msg, :expected '~form, :actual nil})
(catch Throwable t#
(if (some (fn [cause#]
(and
(= ~exception-class (class cause#))
(re-find ~msg-re (.getMessage cause#))))
(causes t#))
(report {:type :pass, :message ~msg,
:expected '~form, :actual t#})
(report {:type :fail, :message ~msg,
:expected '~form, :actual t#})))))
(defn get-field
"Access to private or protected field. field-name is a symbol or
keyword."
([klass field-name]
(get-field klass field-name nil))
([klass field-name inst]
(-> klass (.getDeclaredField (name field-name))
(doto (.setAccessible true))
(.get inst))))
(defn set-var-roots
[maplike]
(doseq [[var val] maplike]
(alter-var-root var (fn [_] val))))
(defn with-var-roots*
"Temporarily set var roots, run block, then put original roots back."
[root-map f & args]
(let [originals (doall (map (fn [[var _]] [var @var]) root-map))]
(set-var-roots root-map)
(try
(apply f args)
(finally
(set-var-roots originals)))))
(defmacro with-var-roots
[root-map & body]
`(with-var-roots* ~root-map (fn [] ~@body)))
(defn exception
"Use this function to ensure that execution of a program doesn't
reach certain point."
[]
(throw (new Exception "Exception which should never occur")))
(defmacro with-err-print-writer
"Evaluate with err pointing to a temporary PrintWriter, and
return err contents as a string."
[& body]
`(let [s# (java.io.StringWriter.)
p# (java.io.PrintWriter. s#)]
(binding [*err* p#]
~@body
(str s#))))
(defmacro with-err-string-writer
"Evaluate with err pointing to a temporary StringWriter, and
return err contents as a string."
[& body]
`(let [s# (java.io.StringWriter.)]
(binding [*err* s#]
~@body
(str s#))))
(defmacro should-print-err-message
"Turn on all warning flags, and test that error message prints
correctly for all semi-reasonable bindings of *err*."
[msg-re form]
`(binding [*warn-on-reflection* true]
(is (re-matches ~msg-re (with-err-string-writer (eval-in-temp-ns ~form))))
(is (re-matches ~msg-re (with-err-print-writer (eval-in-temp-ns ~form))))))
(defmacro should-not-reflect
"Turn on all warning flags, and test that reflection does not occur
(as identified by messages to *err*)."
[form]
`(binding [*warn-on-reflection* true]
(is (nil? (re-find #"^Reflection warning" (with-err-string-writer (eval-in-temp-ns ~form)))))
(is (nil? (re-find #"^Reflection warning" (with-err-print-writer (eval-in-temp-ns ~form)))))))
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