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package scala.tools.nsc
package backend.jvm
import org.junit.Assert._
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import scala.tools.partest.ASMConverters._
import scala.tools.testing.BytecodeTesting
import scala.tools.testing.BytecodeTesting._
@RunWith(classOf[JUnit4])
class StringConcatTest extends BytecodeTesting {
import compiler._
@Test
def appendOverloadNoBoxing(): Unit = {
val code =
"""class C {
| def t1(
| v: Unit,
| z: Boolean,
| c: Char,
| b: Byte,
| s: Short,
| i: Int,
| l: Long,
| f: Float,
| d: Double,
| str: String,
| sbuf: java.lang.StringBuffer,
| chsq: java.lang.CharSequence,
| chrs: Array[Char]) = str + this + v + z + c + b + s + i + f + l + d + sbuf + chsq + chrs
|
| // similar, but starting off with any2stringadd
| def t2(
| v: Unit,
| z: Boolean,
| c: Char,
| b: Byte,
| s: Short,
| i: Int,
| l: Long,
| f: Float,
| d: Double,
| str: String,
| sbuf: java.lang.StringBuffer,
| chsq: java.lang.CharSequence,
| chrs: Array[Char]) = this + str + v + z + c + b + s + i + f + l + d + sbuf + chsq + chrs
|}
""".stripMargin
val c = compileClass(code)
def invokeNameDesc(m: String): List[String] = getInstructions(c, m) collect {
case Invoke(_, _, name, desc, _) => name + desc
}
assertEquals(invokeNameDesc("t1"), List(
"<init>()V",
"append(Ljava/lang/String;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/Object;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/Object;)Ljava/lang/StringBuilder;",
"append(Z)Ljava/lang/StringBuilder;",
"append(C)Ljava/lang/StringBuilder;",
"append(I)Ljava/lang/StringBuilder;",
"append(I)Ljava/lang/StringBuilder;",
"append(I)Ljava/lang/StringBuilder;",
"append(F)Ljava/lang/StringBuilder;",
"append(J)Ljava/lang/StringBuilder;",
"append(D)Ljava/lang/StringBuilder;",
"append(Ljava/lang/StringBuffer;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/CharSequence;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/Object;)Ljava/lang/StringBuilder;", // test that we're not using the [C overload
"toString()Ljava/lang/String;"))
assertEquals(invokeNameDesc("t2"), List(
"<init>()V",
"any2stringadd(Ljava/lang/Object;)Ljava/lang/Object;",
"$plus$extension(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/String;",
"append(Ljava/lang/String;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/Object;)Ljava/lang/StringBuilder;",
"append(Z)Ljava/lang/StringBuilder;",
"append(C)Ljava/lang/StringBuilder;",
"append(I)Ljava/lang/StringBuilder;",
"append(I)Ljava/lang/StringBuilder;",
"append(I)Ljava/lang/StringBuilder;",
"append(F)Ljava/lang/StringBuilder;",
"append(J)Ljava/lang/StringBuilder;",
"append(D)Ljava/lang/StringBuilder;",
"append(Ljava/lang/StringBuffer;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/CharSequence;)Ljava/lang/StringBuilder;",
"append(Ljava/lang/Object;)Ljava/lang/StringBuilder;", // test that we're not using the [C overload
"toString()Ljava/lang/String;"))
}
@Test
def concatPrimitiveCorrectness(): Unit = {
val obj: Object = new { override def toString = "TTT" }
def t(
v: Unit,
z: Boolean,
c: Char,
b: Byte,
s: Short,
i: Int,
l: Long,
f: Float,
d: Double,
str: String,
sbuf: java.lang.StringBuffer,
chsq: java.lang.CharSequence,
chrs: Array[Char]) = {
val s1 = str + obj + v + z + c + b + s + i + f + l + d + sbuf + chsq + chrs
val s2 = obj + str + v + z + c + b + s + i + f + l + d + sbuf + chsq + chrs
s1 + "//" + s2
}
def sbuf = { val r = new java.lang.StringBuffer(); r.append("sbuf"); r }
def chsq: java.lang.CharSequence = "chsq"
val s = t((), true, 'd', 3: Byte, 12: Short, 3, -32l, 12.3f, -4.2d, "me", sbuf, chsq, Array('a', 'b'))
val r = s.replaceAll("""\[C@\w+""", "<ARRAY>")
assertEquals(r, "meTTT()trued312312.3-32-4.2sbufchsq<ARRAY>//TTTme()trued312312.3-32-4.2sbufchsq<ARRAY>")
}
}
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