sbt+ScalaTestと戯れる（その２：ScalaTestでテスト）
sbt+ScalaTestと戯れる（その１：sbtではろーわーるど） - SHI-Zone の続きということで、sbtでScalaTestとキャッキャウフフする流れなど。
sbtにScalaTestを組み込む
project/build/ProjectName.scalaをつくります。
import sbt._
class ProjectName(info: ProjectInfo) extends DefaultProject(info) {
val scalaTest = "org.scalatest" % "scalatest" % "1.2"
}"1.2"の部分がScalaTestのバージョン指定です。
今回はScalaが2.8.1なので1.2です。
2.7系の場合は1.1でよかったはず。
プロジェクトを更新してScalaTestをインストールする
> reload [info] Recompiling project definition... [info] Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed. [info] Building project test 1.0 against Scala 2.8.1 [info] using test with sbt 0.7.4 and Scala 2.7.7 > update [info] [info] == update == [info] :: retrieving :: test#test_2.8.1 [sync] [info] confs: [compile, runtime, test, provided, system, optional, sources, javadoc] [info] 1 artifacts copied, 0 already retrieved (1742kB/138ms) [info] == update == [success] Successful. [info] [info] Total time: 1 s, completed 2011/01/19 1:24:38 >
あっという間にScalaTestさんがやってきました。
折角なので俺はこのScalaTestでTDDの真似事をするぜ
さっくりとテストコードなどを作ってみます。
特に意味のない、二つの文字列を結合して返すjoinメソッドを持ったStringJoinerオブジェクトのテストコードを書きます。
src/test/scala/StringJoinerTest.scala
import org.scalatest.FunSuite class StringJoinerTest extends FunSuite { test("String Join") { assert(StringJoiner.join("a", "b") === "ab") } }
テストします
> test
[info]
[info] == compile ==
[info] Source analysis: 0 new/modified, 0 indirectly invalidated, 0 removed.
[info] Compiling main sources...
[info] Nothing to compile.
[info] Post-analysis: 2 classes.
[info] == compile ==
[info]
[info] == copy-resources ==
[info] == copy-resources ==
[info]
[info] == copy-test-resources ==
[info] == copy-test-resources ==
[info]
[info] == test-compile ==
[info] Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed.
[info] Compiling test sources...
[error] /home/razon/test/src/test/scala/StringJoinerTest.scala:5: not found: value StringJoiner
[error] assert(StringJoiner.join("a", "b") === "ab")
[error] ^
[error] one error found
[info] == test-compile ==
[error] Error running test-compile: Compilation failed
[info]
[info] Total time: 3 s, completed 2011/01/19 1:30:58
> ねえよバカくたばれとか怒られちゃいました。当然ですね。
そんな訳でStringJoinerをさっくりと実装しちゃいます。
/src/main/scala/StringJoiner.scala
object StringJoiner { def join(str1: String, str2: String) = str1 + str2 }
適当ですね。
再度テストにチャレンジしてみます。
> test [info] [info] == compile == [info] Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed. [info] Compiling main sources... [info] Compilation successful. [info] Post-analysis: 4 classes. [info] == compile == [info] [info] == copy-resources == [info] == copy-resources == [info] [info] == test-compile == [info] Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed. [info] Compiling test sources... [info] Compilation successful. [info] Post-analysis: 2 classes. [info] == test-compile == [info] [info] == copy-test-resources == [info] == copy-test-resources == [info] [info] == test-start == [info] == test-start == [info] [info] == StringJoinerTest == [info] Test Starting: String Join [info] Test Passed: String Join [info] == StringJoinerTest == [info] [info] == test-complete == [info] == test-complete == [info] [info] == test-finish == [info] Passed: : Total 1, Failed 0, Errors 0, Passed 1, Skipped 0 [info] [info] All tests PASSED. [info] == test-finish == [info] [info] == test-cleanup == [info] == test-cleanup == [info] [info] == test == [info] == test == [success] Successful. [info] [info] Total time: 7 s, completed 2011/01/19 1:33:49 >
無事パスできました。
本来ならここからリファクタリングだぜってとこですが、やりようがないので今日はここまでとします。
最後に
取り敢えず触り部分をざっくり通してみましたが、当然sbtにせよScalaTestにせよ豊富な機能がもりもりあったりします。
ドキュメントを斜め読みしつつ色々とチャレンジしてみましょう。
