stringbuilder.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 100 行

/* $Id: stringbuilder.scala 14446 2008-03-25 15:50:30Z michelou $ */

import testing.SUnit._

/** Test the Scala implementation of class <code>scala.StringBuilder</code>.
 *
 *  @author Stephane Micheloud
 */
object Test extends TestConsoleMain {
  def suite = new TestSuite(
    Test1, //ctor, reverse
    Test2, //append
    Test3, //insert
    Test4  //indexOf, lastIndexOf
  )
}

object Test1 extends TestCase("ctor") with Assert {
  override def enableStackTrace = false
  override def runTest {
    val j0 = new java.lang.StringBuilder("abc") // Java 1.5+
    val s0 = new StringBuilder("abc")
    assertEquals("s0 equals j0", false, s0 equals j0)
    assertEquals("s0.toString equals j0.toString", true, s0.toString equals j0.toString)

    val str = """
Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages. It is also fully interoperable with Java."""
    val j1 = new java.lang.StringBuilder(100) append str
    val s1 = new java.lang.StringBuilder(100) append str
    assertEquals("s1.toString equals j1.toString", true, s1.toString equals j1.toString)

    val j2 = j0 reverse
    val s2 = s0 reverse;
    //println("j2="+j2+", s2="+s2)//debug
    assertEquals("s2.toString equals j2.toString", true, s2.toString equals j2.toString)

    val j3 = j2; j3 setCharAt (0, j3 charAt 2)
    val s3 = s2; s3(0) = s3(2)
    //println("j3="+j3+", s3="+s3)//debug
    assertEquals("s3.toString equals j3.toString", true, s3.toString equals j3.toString)    
 }
}

object Test2 extends TestCase("append") with Assert {
  override def enableStackTrace = false
  override def runTest {
    val j0 = new java.lang.StringBuilder("abc") // Java 1.5+
    val s0 = new StringBuilder("abc")

    j0 append true append (1.toByte) append 'a' append 9 append -1L append 1.2e-10f append -2.1e+100d
    s0 append true append (1.toByte) append 'a' append 9 append -1L append 1.2e-10f append -2.1e+100d
    assertEquals("s0.toString equals j0.toString", true, s0.toString equals j0.toString)

    val j1 = new java.lang.StringBuilder // Java 1.5+
    val s1 = new StringBuilder
    j1 append "###" append Array('0', '1', '2') append "xyz".subSequence(0, 3)
    s1 append "###" append Array('0', '1', '2') append List('x', 'y', 'z')
    assertEquals("s1.toString equals j1.toString", true, s1.toString equals j1.toString)
 }
}

object Test3 extends TestCase("insert") with Assert {
  override def enableStackTrace = false
  override def runTest {
    val j0 = new java.lang.StringBuilder("abc") // Java 1.5+
    val s0 = new StringBuilder("abc")

    j0 insert (0, true) insert (0, 1.toByte) insert (0, 'a') insert (0, 88.toShort) insert (0, 9) insert (0, -1L)
    s0 insert (0, true) insert (0, 1.toByte) insert (0, 'a') insert (0, 88.toShort) insert (0, 9) insert (0, -1L)
    //println("j0="+j0+", s0="+s0)//debug
    assertEquals("s0.toString equals j0.toString", true, s0.toString equals j0.toString)

    val j1 = new java.lang.StringBuilder // Java 1.5+
    val s1 = new StringBuilder
    j1 insert (0, "###") insert (0, Array('0', '1', '2')) insert (0, "xyz".subSequence(0, 3))
    s1 insert (0, "###") insert (0, Array('0', '1', '2')) insert (0, List('x', 'y', 'z'))
    //println("j1="+j1+", s1="+s1)//debug
    assertEquals("s1.toString equals j1.toString", true, s1.toString equals j1.toString)

  }
}

object Test4 extends TestCase("indefOf") with Assert {
  override def enableStackTrace = false
  override def runTest {
    val j0 = new java.lang.StringBuilder("abc") // Java 1.5+
    val s0 = new StringBuilder("abc")

    val j1 = j0 indexOf("c")
    val s1 = s0 indexOf("c")
    //println("j1="+j1+", s1="+s1)//debug
    assertEquals("s1 == j1", true, s1 == j1)

    val j2 = j0 append "123abc" lastIndexOf("c")
    val s2 = s0 append "123abc" lastIndexOf("c")
    //println("j2="+j2+", s2="+s2)//debug
    assertEquals("s2 == j2", true, s2 == j2)
 }
}