object JobTest

Set up a Scio job for end-to-end unit testing. To be used in a PipelineSpec. For example:

import com.spotify.scio.testing._

class WordCountTest extends PipelineSpec {

  // Mock input data, mock distributed cache and expected result
  val inData = Seq("a b c d e", "a b a b")
  val distCache = Map(1 -> "Jan", 2 -> "Feb", 3 -> "Mar")
  val expected = Seq("a: 3", "b: 3", "c: 1", "d: 1", "e: 1")

  // Test specification
  "WordCount" should "work" in {
    JobTest("com.spotify.scio.examples.WordCount")
    // Or the type safe version
    // JobTest[com.spotify.scio.examples.WordCount.type]

      // Command line arguments
      .args("--input=in.txt", "--output=out.txt")

      // Mock input data
      .input(TextIO("in.txt"), inData)

      // Mock distributed cache
      .distCache(DistCacheIO("gs://dataflow-samples/samples/misc/months.txt"), distCache)

      // Verify output
      .output(TextIO("out.txt")) { actual => actual should containInAnyOrder (expected) }

      // Run job test
      .run()
  }
}
Source
JobTest.scala
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  1. case class BeamOptions(opts: List[String]) extends Product with Serializable
  2. class Builder extends AnyRef

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  4. def apply(job: (ScioContext) => Any)(implicit bo: BeamOptions): Builder

    Create a new JobTest.Builder instance.

  5. def apply[T](implicit arg0: ClassTag[T], bo: BeamOptions): Builder

    Create a new JobTest.Builder instance.

  6. def apply(className: String)(implicit bo: BeamOptions): Builder

    Create a new JobTest.Builder instance.

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