Scala example source code file (stringbuilder.scala)

This example Scala source code file (stringbuilder.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 - Scala tags/keywords

array, array, assert, assert, it, java, java, list, stringbuilder, stringbuilder, test2, test3, test4, testcase

The Scala stringbuilder.scala source code

import testing.SUnit._

/** Test the Scala implementation of class <code>scala.StringBuilder.
 *
 *  @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 "###" appendAll Array('0', '1', '2') appendAll 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, "###") insertAll (0, Array('0', '1', '2')) insertAll (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)
 }
}