test_is/tests.clj: unit tests for clojure.contrib.test-is (finally)

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+;;; test_is/tests.clj: unit tests for test_is.clj
+
+;; by Stuart Sierra, http://stuartsierra.com/
+;; January 15, 2009
+
+;; Thanks to Chas Emerick, Allen Rohner, and Stuart Halloway for
+;; contributions and suggestions.
+
+;; Copyright (c) Stuart Sierra, 2008. 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.
+
+
+(ns clojure.contrib.test-is.tests
+  (:use clojure.contrib.test-is))
+
+(deftest can-test-symbol
+  (let [x true]
+    (is x "Should pass"))
+  (let [x false]
+    (is x "Should fail")))
+
+(deftest can-test-boolean
+  (is true "Should pass")
+  (is false "Should fail"))
+
+(deftest can-test-nil
+  (is nil "Should fail"))
+
+(deftest can-test-=
+  (is (= 2 (+ 1 1)) "Should pass")
+  (is (= 3 (+ 2 2)) "Should fail"))
+
+(deftest can-test-instance
+  (is (instance? Integer (+ 2 2)) "Should pass")
+  (is (instance? Float (+ 1 1)) "Should fail"))
+
+(deftest can-test-thrown
+  (is (thrown? ArithmeticException (/ 1 0)) "Should pass")
+  (is (thrown? Exception (+ 1 1)) "Should fail")
+  (is (thrown? ArithmeticException (throw (RuntimeException.))) "Should error"))
+
+(deftest can-catch-unexpected-exceptions
+  (is (= 1 (throw (Exception.))) "Should error"))
+
+
+;; Here, we create an alternate version of test-is/report, that
+;; compares the event with the message.  The alternate calls the
+;; original with modified arguments.
+
+(declare original-report)
+
+(defn custom-report [event msg expected actual]
+  (if (or (and (= event :fail) (= msg "Should fail"))
+          (and (= event :pass) (= msg "Should pass"))
+          (and (= event :error) (= msg "Should error")))
+    (original-report :pass msg expected actual)
+    (original-report :fail (str msg " but got " event) expected actual)))
+
+;; test-ns-hook will be used by test-is/test-ns to run tests in this
+;; namespace.
+(defn test-ns-hook []
+  (binding [original-report report
+            report custom-report]
+    (test-all-vars (find-ns 'clojure.contrib.test-is.tests))))