org.scalatest.fixture.ConfigMapFixture.scala Maven / Gradle / Ivy

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/*
 * Copyright 2001-2013 Artima, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.scalatest.fixture

import org.scalatest._

/**
 * Trait that when mixed into a fixture.Suite passes
 * the config map passed to runTest as a fixture into each test.
 *
 * 
 * Here's an example in which tests just check to make sure "hello" and "world"
 * are defined keys in the config map:
 * 
 *
 *  * package org.scalatest.examples.fixture.configmapfixture
 * 
 * import org.scalatest._
 * 
 * class ExampleSpec extends fixture.FlatSpec with fixture.ConfigMapFixture with ShouldMatchers {
 * 
 *   "The config map" should "contain hello" in { configMap =>
 *     // Use the configMap passed to runTest in the test
 *     configMap should contain key "hello"
 *   }
 * 
 *   it should "contain world" in { configMap =>
 *     configMap should contain key "world"
 *   }
 * }
 * 
 *
 * 
 * If you run this class without defining "hello" and "world"
 * in the confg map, the tests will fail:
 * 
 *
 *  * scala> new ExampleSpec execute
 * ExampleSpec:
 * The config map
 * - should contain hello *** FAILED ***
 *   Map() did not contain key "hello" (:20)
 * - should contain world *** FAILED ***
 *   Map() did not contain key "world" (:24)
 * 
 * 
 * 
 * If you do define "hello" and "world" keys
 * in the confg map, the tests will success:
 * 
 *
 *  * scala> new ExampleSpec execute (configMap = Map("hello" -> "hi", "world" -> "globe"))
 * ExampleSpec:
 * The config map
 * - should contain hello
 * - should contain world
 * 
 * 
 * @author Bill Venners
 */
trait ConfigMapFixture { this: fixture.Suite =>

  /**
   * The type of the configMap, which is ConfigMap.
   */
  type FixtureParam = ConfigMap

  /**
   * Invoke the test function, passing to the the test function the configMap
   * obtained by invoking configMap on the passed OneArgTest.
   *
   * 
   * To enable stacking of traits that define withFixture(NoArgTest), this method does not
   * invoke the test function directly. Instead, it delegates responsibility for invoking the test function
   * to withFixture(NoArgTest).
   * 
   *
   * @param test the OneArgTest to invoke, passing in the
   *   configMap fixture
   */
  def withFixture(test: OneArgTest): Outcome = {
    withFixture(test.toNoArgTest(test.configMap))
  }
}