Lift Framework example source code file (BasicTypesHelpersSpec.scala)

This example Lift Framework source code file (BasicTypesHelpersSpec.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lift Framework tags/keywords

any, array, array, boolean, full, int, io, list, list, none, none, partialfunction, some, some, string

The Lift Framework BasicTypesHelpersSpec.scala source code

/*
 * Copyright 2006-2011 WorldWide Conferencing, LLC
 *
 * 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 net.liftweb
package util

import java.io.ByteArrayInputStream

import org.specs.Specification
import org.specs.util.DataTables

import common._
import BasicTypesHelpers._


/**
 * Systems under specification for BasicTypesHelpers.
 */
object BasicTypesHelpersSpec extends Specification("BasicTypesHelpers Specification") with DataTables {

  "Basic types helpers" should {

    "be lazy" in {
      (false.?[Int]({throw new Exception("Bummer")}).|(3)) must_== 3
      (true.?[Int](3).|({throw new Exception("Bummer")})) must_== 3
    }

    "provide a ternary operator: (condition) ? A | B" in {
      (1 == 2) ? "a" | "b" must_== "b"
    }

    "provide a ?> operator to add an element to a list if an expression is true" in {
      (1 == 1) ?> "a" ::: List("b") must_== List("a", "b")
      (1 == 2) ?> "a" ::: List("b") must_== List("b")
    }
    val failure = Failure(null, null, null)
    "have a toBoolean method converting any object to a reasonable Boolean value" in {
      "object value"  | "boolean value"  |>
      (0: Any)        ! false            |
      1               ! true             |
      (null:Any)      ! false            |
      true            ! true             |
      false           ! false            |
      ""              ! false            |
      "string"        ! false            |
      "t"             ! true             |
      "total"         ! true             |
      "T"             ! true             |
      "This"          ! true             |
      "0"             ! false            |
      None            ! false            |
      Some("t")       ! true             |
      Empty           ! false            |
      Full("t")       ! true             |
      failure         ! false            |
      List("t", "f")  ! true             | {
        (o: Any, result: Boolean) => toBoolean(o) must_== result
      }
    }

    "have a AsBoolean extractor converting any object to a reasonable Boolean value" in {
      "object value"  | "boolean value" |>
      "t"             ! Some(true)      |
      ""              ! None            |
      "string"        ! None            |
      "total"         ! None            |
      "T"             ! Some(true)      |
      "This"          ! None            |
      "0"             ! Some(false)     | {
        (o: String, result: Option[Boolean]) => AsBoolean.unapply(o) must_== result
      }
    }

    "have an AsInt extractor converting any String to a reasonable Int value" in {
      "object value"  | "int value" |>
      "3"             ! Some(3)     |
      "n"             ! None        | {
        (o: String, result: Option[Int]) => AsInt.unapply(o) must_== result
      }
    }

    "have an AsLong extractor converting any String to a reasonable Long value" in {
      "object value"  | "long value"  |>
      "3"             ! Some(3L)      |
      "n"             ! None          | {
        (o: String, result: Option[Long]) => AsLong.unapply(o) must_== result
      }
    }

    "have a toInt method converting any object to a reasonable Int value" in {
      def date(t: Int) = new _root_.java.util.Date(t)
      "object value"  | "int value" |>
      (null: Any)     ! 0           |
      1               ! 1           |
      1L              ! 1           |
      List(1, 2)      ! 1           |
      Some(1)         ! 1           |
      Full(1)         ! 1           |
      None            ! 0           |
      Empty           ! 0           |
      failure         ! 0           |
      "3"             ! 3           |
      "n"             ! 0           |
      date(3000)      ! 3           | {
        (o: Any, result: Int) => toInt(o) must_== result
      }
    }

    "have a toLong method converting any object to a reasonable Long value" in {
      def date(t: Int) = new _root_.java.util.Date(t)
      "object value"  | "long value"  |>
      (null: Any)     ! 0L            |
      1               ! 1L            |
      1L              ! 1L            |
      List(1, 2)      ! 1L            |
      Some(1)         ! 1L            |
      Full(1)         ! 1L            |
      None            ! 0L            |
      Empty           ! 0L            |
      failure         ! 0L            |
      "3"             ! 3L            |
      "n"             ! 0L            |
      date(3000)      ! 3000L         | {
        (o: Any, result: Long) => toLong(o) must_== result
      }
    }

    "have a toByteArrayInputStream reading an InputStream to a ByteArrayInputStream" in {
      var array: Array[Byte] = Array(12, 14)
      val input = new ByteArrayInputStream(array)
      val result = toByteArrayInputStream(input)
      result.read must_== 12
      result.read must_== 14
    }
    "have a isEq method comparing 2 Byte arrays and returning true if they contain the same elements" in {
      var a: Array[Byte] = Array(12, 14)
      var b: Array[Byte] = Array(12, 14)
      var c: Array[Byte] = Array(12, 13)
      isEq(a, b) must beTrue
      isEq(a, c) must beFalse
    }
    "have a notEq method comparing 2 Byte arrays and returning true if they don't contain the same elements" in {
      var a: Array[Byte] = Array(12, 14)
      var b: Array[Byte] = Array(12, 13)
      BasicTypesHelpers.notEq(a, b) must beTrue
    }
  }

  "PartialFunction guard" should {

    "put a guard around a partial function" in {
      val pf1: PartialFunction[String, Unit] = {
        case s if s.startsWith("s") => true
      }

      val pf2: PartialFunction[String, Boolean] = {
        case "snipe" => true
        case "bipe"  => false
      }

      val pf3 = pf1.guard(pf2)
      val pf4: PartialFunction[String, Boolean] = pf1.guard(pf3)

      pf3.isDefinedAt("bipe") must_== false
      pf3.isDefinedAt("snipe") must_== true
    }
  }

}