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package scala
import language.implicitConversions
import org.junit.Test
import org.junit.Assert._
import org.junit.runner.RunWith
import org.junit.runners.JUnit4
import scala.tools.testing.AssertUtil._
@RunWith(classOf[JUnit4])
class StringContextTest {
import StringContext._
@Test def noEscape() = {
val s = "string"
val res = processEscapes(s)
assertEquals(s, res)
}
@Test def tabbed() = {
val s = """a\tb"""
val res = processEscapes(s)
assertEquals("a\tb", res)
}
@Test def quoted() = {
val s = """hello, \"world\""""
val res = processEscapes(s)
assertEquals("""hello, "world"""", res)
}
@Test def octal() = {
val s = """\123cala"""
val res = treatEscapes(s)
assertEquals("Scala", res)
}
@Test def doubled() = {
val s = """\123cala\123yntax"""
val res = treatEscapes(s)
assertEquals("ScalaSyntax", res)
}
@Test def badly() = assertThrows[InvalidEscapeException] {
val s = """Scala\"""
val res = treatEscapes(s)
assertEquals("Scala", res)
}
@Test def noOctal() = assertThrows[InvalidEscapeException] {
val s = """\123cala"""
val res = processEscapes(s)
assertEquals("Scala", res)
}
@Test def t6631_baseline() = assertEquals("\f\r\n\t", s"""\f\r\n\t""")
@Test def t6631_badEscape() = assertThrows[InvalidEscapeException] {
s"""\x"""
}
// verifying that the standard interpolators can be supplanted
@Test def antiHijack_?() = {
object AllYourStringsAreBelongToMe { case class StringContext(args: Any*) { def s(args: Any) = "!!!!" } }
import AllYourStringsAreBelongToMe._
//assertEquals("????", s"????")
assertEquals("!!!!", s"????") // OK to hijack core interpolator ids
}
@Test def fIf() = {
val res = f"${if (true) 2.5 else 2.5}%.2f"
val expected = formatUsingCurrentLocale(2.50)
assertEquals(expected, res)
}
@Test def fIfNot() = {
val res = f"${if (false) 2.5 else 3.5}%.2f"
val expected = formatUsingCurrentLocale(3.50)
assertEquals(expected, res)
}
@Test def fHeteroArgs() = {
val res = f"${3.14}%.2f rounds to ${3}%d"
val expected = formatUsingCurrentLocale(3.14) + " rounds to 3"
assertEquals(expected, res)
}
// Use this method to avoid problems with a locale-dependent decimal mark.
// The string interpolation is not used here intentionally as this method is used to test string interpolation.
private def formatUsingCurrentLocale(number: Double, decimalPlaces: Int = 2) = ("%." + decimalPlaces + "f").format(number)
@Test def `f interpolator baseline`(): Unit = {
implicit def stringToBoolean(s: String): Boolean = java.lang.Boolean.parseBoolean(s)
implicit def stringToChar(s: String): Char = s(0)
implicit def str2fmt(s: String): java.util.Formattable = new java.util.Formattable {
def formatTo(f: java.util.Formatter, g: Int, w: Int, p: Int) = f.format("%s", s)
}
val b_true = true
val b_false = false
val i = 42
val f_zero = 0.0
val f_zero_- = -0.0
val s = "Scala"
val fff = new java.util.Formattable {
def formatTo(f: java.util.Formatter, g: Int, w: Int, p: Int) = f.format("4")
}
import java.util.{ Calendar, Locale }
val c = Calendar.getInstance(Locale.US)
c.set(2012, Calendar.MAY, 26)
implicit def strToDate(x: String): Calendar = c
val ss = List[(String, String)] (
// 'b' / 'B' (category: general)
// -----------------------------
f"${b_false}%b" -> "false",
f"${b_true}%b" -> "true",
f"${null}%b" -> "false",
f"${false}%b" -> "false",
f"${true}%b" -> "true",
f"${true && false}%b" -> "false",
f"${new java.lang.Boolean(false)}%b" -> "false",
f"${new java.lang.Boolean(true)}%b" -> "true",
f"${null}%B" -> "FALSE",
f"${false}%B" -> "FALSE",
f"${true}%B" -> "TRUE",
f"${new java.lang.Boolean(false)}%B" -> "FALSE",
f"${new java.lang.Boolean(true)}%B" -> "TRUE",
f"${"true"}%b" -> "true",
f"${"false"}%b"-> "false",
// 'h' | 'H' (category: general)
// -----------------------------
f"${null}%h" -> "null",
f"${f_zero}%h" -> "0",
f"${f_zero_-}%h" -> "80000000",
f"${s}%h" -> "4c01926",
f"${null}%H" -> "NULL",
f"${s}%H" -> "4C01926",
// 's' | 'S' (category: general)
// -----------------------------
f"${null}%s" -> "null",
f"${null}%S" -> "NULL",
f"${s}%s" -> "Scala",
f"${s}%S" -> "SCALA",
f"${5}" -> "5",
f"${i}" -> "42",
f"${'foo}" -> "'foo",
f"${Thread.State.NEW}" -> "NEW",
// 'c' | 'C' (category: character)
// -------------------------------
f"${120:Char}%c" -> "x",
f"${120:Byte}%c" -> "x",
f"${120:Short}%c" -> "x",
f"${120:Int}%c" -> "x",
f"${new java.lang.Character('x')}%c" -> "x",
f"${new java.lang.Byte(120:Byte)}%c" -> "x",
f"${new java.lang.Short(120:Short)}%c" -> "x",
f"${new java.lang.Integer(120)}%c" -> "x",
f"${'x' : java.lang.Character}%c" -> "x",
f"${(120:Byte) : java.lang.Byte}%c" -> "x",
f"${(120:Short) : java.lang.Short}%c" -> "x",
f"${120 : java.lang.Integer}%c" -> "x",
f"${"Scala"}%c" -> "S",
// 'd' | 'o' | 'x' | 'X' (category: integral)
// ------------------------------------------
f"${120:Byte}%d" -> "120",
f"${120:Short}%d" -> "120",
f"${120:Int}%d" -> "120",
f"${120:Long}%d" -> "120",
f"${60 * 2}%d" -> "120",
f"${new java.lang.Byte(120:Byte)}%d" -> "120",
f"${new java.lang.Short(120:Short)}%d" -> "120",
f"${new java.lang.Integer(120)}%d" -> "120",
f"${new java.lang.Long(120)}%d" -> "120",
f"${120 : java.lang.Integer}%d" -> "120",
f"${120 : java.lang.Long}%d" -> "120",
f"${BigInt(120)}%d" -> "120",
f"${new java.math.BigInteger("120")}%d" -> "120",
f"${4}%#10X" -> " 0X4",
f"She is ${fff}%#s feet tall." -> "She is 4 feet tall.",
f"Just want to say ${"hello, world"}%#s..." -> "Just want to say hello, world...",
{ implicit val strToShort = (s: String) => java.lang.Short.parseShort(s) ; f"${"120"}%d" } -> "120",
{ implicit val strToInt = (s: String) => 42 ; f"${"120"}%d" } -> "42",
// 'e' | 'E' | 'g' | 'G' | 'f' | 'a' | 'A' (category: floating point)
// ------------------------------------------------------------------
f"${3.4f}%e" -> "3.400000e+00",
f"${3.4}%e" -> "3.400000e+00",
f"${3.4f : java.lang.Float}%e" -> "3.400000e+00",
f"${3.4 : java.lang.Double}%e" -> "3.400000e+00",
f"${BigDecimal(3.4)}%e" -> "3.400000e+00",
f"${new java.math.BigDecimal(3.4)}%e" -> "3.400000e+00",
f"${3}%e" -> "3.000000e+00",
f"${3L}%e" -> "3.000000e+00",
// 't' | 'T' (category: date/time)
// -------------------------------
f"${c}%TD" -> "05/26/12",
f"${c.getTime}%TD" -> "05/26/12",
f"${c.getTime.getTime}%TD" -> "05/26/12",
f"""${"1234"}%TD""" -> "05/26/12",
// literals and arg indexes
f"%%" -> "%",
f" mind%n------%nmatter%n" ->
"""| mind
|------
|matter
|""".stripMargin,
f"${i}%d %<d ${9}%d" -> "42 42 9",
f"${7}%d %<d ${9}%d" -> "7 7 9",
f"${7}%d %2$$d ${9}%d" -> "7 9 9",
f"${null}%d %<B" -> "null FALSE",
f"${5: Any}" -> "5",
f"${5}%s%<d" -> "55",
f"${3.14}%s,%<f" -> "3.14,3.140000",
f"z" -> "z"
)
for ((f, s) <- ss) assertEquals(s, f)
}
}
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