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1 ; Copyright (c) Rich Hickey. All rights reserved.
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2 ; The use and distribution terms for this software are covered by the
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3 ; Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
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4 ; which can be found in the file epl-v10.html at the root of this distribution.
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5 ; By using this software in any fashion, you are agreeing to be bound by
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6 ; the terms of this license.
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7 ; You must not remove this notice, or any other, from this software.
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8
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9 ; Author: Stuart Halloway
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10
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11 (ns clojure.test-clojure.rt
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12 (:use clojure.test clojure.test-clojure.helpers))
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13
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14 (defmacro with-err-print-writer
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15 "Evaluate with err pointing to a temporary PrintWriter, and
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16 return err contents as a string."
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17 [& body]
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18 `(let [s# (java.io.StringWriter.)
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19 p# (java.io.PrintWriter. s#)]
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20 (binding [*err* p#]
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21 ~@body
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22 (str s#))))
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23
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24 (defmacro with-err-string-writer
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25 "Evaluate with err pointing to a temporary StringWriter, and
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26 return err contents as a string."
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27 [& body]
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28 `(let [s# (java.io.StringWriter.)]
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29 (binding [*err* s#]
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30 ~@body
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31 (str s#))))
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32
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33 (defmacro should-print-err-message
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34 "Turn on all warning flags, and test that error message prints
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35 correctly for all semi-reasonable bindings of *err*."
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36 [msg-re form]
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37 `(binding [*warn-on-reflection* true]
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38 (is (re-matches ~msg-re (with-err-string-writer (eval-in-temp-ns ~form))))
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39 (is (re-matches ~msg-re (with-err-print-writer (eval-in-temp-ns ~form))))))
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40
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41 (defn bare-rt-print
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42 "Return string RT would print prior to print-initialize"
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43 [x]
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44 (with-out-str
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45 (try
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46 (push-thread-bindings {#'clojure.core/print-initialized false})
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47 (clojure.lang.RT/print x *out*)
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48 (finally
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49 (pop-thread-bindings)))))
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50
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51 (deftest rt-print-prior-to-print-initialize
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52 (testing "pattern literals"
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53 (is (= "#\"foo\"" (bare-rt-print #"foo")))))
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54
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55 (deftest error-messages
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56 (testing "binding a core var that already refers to something"
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57 (should-print-err-message
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58 #"WARNING: prefers already refers to: #'clojure.core/prefers in namespace: .*\r?\n"
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59 (defn prefers [] (throw (RuntimeException. "rebound!")))))
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60 (testing "reflection cannot resolve field"
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61 (should-print-err-message
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62 #"Reflection warning, NO_SOURCE_PATH:\d+ - reference to field blah can't be resolved\.\r?\n"
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63 (defn foo [x] (.blah x))))
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64 (testing "reflection cannot resolve instance method"
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65 (should-print-err-message
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66 #"Reflection warning, NO_SOURCE_PATH:\d+ - call to zap can't be resolved\.\r?\n"
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67 (defn foo [x] (.zap x 1))))
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68 (testing "reflection cannot resolve static method"
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69 (should-print-err-message
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70 #"Reflection warning, NO_SOURCE_PATH:\d+ - call to valueOf can't be resolved\.\r?\n"
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71 (defn foo [] (Integer/valueOf #"boom"))))
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72 (testing "reflection cannot resolve constructor"
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73 (should-print-err-message
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74 #"Reflection warning, NO_SOURCE_PATH:\d+ - call to java.lang.String ctor can't be resolved\.\r?\n"
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75 (defn foo [] (String. 1 2 3)))))
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76
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77 (def example-var)
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78 (deftest binding-root-clears-macro-metadata
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79 (alter-meta! #'example-var assoc :macro true)
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80 (is (contains? (meta #'example-var) :macro))
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81 (.bindRoot #'example-var 0)
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82 (is (not (contains? (meta #'example-var) :macro))))
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83
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84 (deftest last-var-wins-for-core
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85 (testing "you can replace a core name, with warning"
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86 (let [ns (temp-ns)
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87 replacement (gensym)]
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88 (with-err-string-writer (intern ns 'prefers replacement))
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89 (is (= replacement @('prefers (ns-publics ns))))))
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90 (testing "you can replace a name you defined before"
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91 (let [ns (temp-ns)
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92 s (gensym)
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93 v1 (intern ns 'foo s)
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94 v2 (intern ns 'bar s)]
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95 (with-err-string-writer (.refer ns 'flatten v1))
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96 (.refer ns 'flatten v2)
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97 (is (= v2 (ns-resolve ns 'flatten)))))
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98 (testing "you cannot intern over an existing non-core name"
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99 (let [ns (temp-ns 'clojure.set)
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100 replacement (gensym)]
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101 (is (thrown? IllegalStateException
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102 (intern ns 'subset? replacement)))
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103 (is (nil? ('subset? (ns-publics ns))))
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104 (is (= #'clojure.set/subset? ('subset? (ns-refers ns))))))
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105 (testing "you cannot refer over an existing non-core name"
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106 (let [ns (temp-ns 'clojure.set)
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107 replacement (gensym)]
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108 (is (thrown? IllegalStateException
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109 (.refer ns 'subset? #'clojure.set/intersection)))
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110 (is (nil? ('subset? (ns-publics ns))))
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111 (is (= #'clojure.set/subset? ('subset? (ns-refers ns)))))))
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