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使用Culjure到单元测试Java

clojure unit-testing

Ralph java.is.for.desktop · 技术社区 · 14 年前

让组织接受另一种JVM语言的一种方法是首先使用它来对Java代码进行单元测试——“Boss,我要在XXX中编写一些单元测试。它永远不会投入生产。”

在Clojure有做这个的教程吗?

我刚刚开始使用Scala来测试Java REST服务器。用scala编写测试允许我嵌入预期的XML输出,用文本模拟数据库调用 List 对象等,更不用说特性使得为测试提取公共代码变得非常容易。

2 回复 | 直到 8 年前

Alex Miller 14 年前

clojure.test Java interop

(ns example.test-java-util
  (:use
   [clojure.test])
  (:import [java.util HashSet]))

(defn new-empty-set []
  (HashSet.))

(deftest test-empty-set
  (is (= 0 (.size (new-empty-set))))
  (is (= true (.isEmpty (new-empty-set))))
  (is (= (new-empty-set) (new-empty-set))))

(deftest test-add-remove
  (is (= (new-empty-set)
         (doto (new-empty-set)
           (.add "xyz")
           (.remove "xyz")))))

example.test-java-util> (run-tests 'example.test-java-util)

Testing example.test-java-util

Ran 1 tests containing 4 assertions.
0 failures, 0 errors.
{:type :summary, :test 1, :pass 4, :fail 0, :error 0}

devstopfix 8 年前

Leiningen test.check

pom.xml
project.clj
src
  main
    java
      quicktest
        Discontinuities.java
  test
    clojure
      quicktest
        test_discontinuities.clj

package quicktest;
public class Discontinuities {
    public static double f5(double x) {
        return x / (x-5);
    }
}

(ns quicktest.test-discontinuities
   (:import [quicktest Discontinuities])
   (:require [clojure.test :refer :all]
     [clojure.test.check :as tc]
     [clojure.test.check.generators :as gen]
     [clojure.test.check.properties :as prop]
     [clojure.test.check.clojure-test :as ct :refer (defspec)]))

(deftest test-single-case
  (is (= 2.0 (Discontinuities/f5 10))))

(defspec test-discontinuities 1e4
        (prop/for-all [x gen/nat ]
                      (let [y (Discontinuities/f5 x)]
                           (is (<= y x)))))

(defproject quicktest/discontinuities "0.1"
            :dependencies [[org.clojure/clojure "1.8.0"]
                           [org.clojure/test.check "0.9.0"]]
            :java-source-paths ["src/main/java"]
            :test-paths ["src/test/clojure"])

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>quicktest</groupId>
    <artifactId>discontinuities</artifactId>
    <version>0.1</version>
</project>

mvn compile
lein deps
lein test

FAIL in (test-discontinuities) (test_discontinuities.clj:13)
expected: (<= y x)
actual: (not (<= Infinity 5))
{:test-var "test-discontinuities", 
 :result false, 
 :seed 1431128331945, 
 :failing-size 23, 
 :num-tests 24, 
 :fail [5], 
 :shrunk {:total-nodes-visited 3, :depth 0, :result false, :smallest [5]}}