From 883ca63361a039f27e412eb0cb1bee7e9742a0bb Mon Sep 17 00:00:00 2001
From: Dmitry Nadezhin <Dmitry.Nadezhin@gmail.com>
Date: Mon, 2 Apr 2012 10:29:25 +0400
Subject: SI-5627 BigInt.equals(Number) and BigDecimal.equals(Number) should
 implement equality in mathematical sense

---
 test/files/run/is-valid-num.scala | 77 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

(limited to 'test/files/run/is-valid-num.scala')

diff --git a/test/files/run/is-valid-num.scala b/test/files/run/is-valid-num.scala
index f919a21dee..9c43e98911 100644
--- a/test/files/run/is-valid-num.scala
+++ b/test/files/run/is-valid-num.scala
@@ -1,11 +1,15 @@
 object Test {
   def x = BigInt("10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
   def y = BigDecimal("" + (Short.MaxValue + 1) + ".0")
+  def y1 = BigDecimal("0.1")
+  def y2 = BigDecimal("0.5")
   
   def l1 = Int.MaxValue.toLong + 1
   def l2 = Int.MinValue.toLong - 1
 
   def main(args: Array[String]): Unit = {
+    assert(!x.isValidDouble, x)
+    assert(!x.isValidFloat, x)
     assert(!x.isValidLong, x)
     assert(!x.isValidInt, x)
     assert(!x.isValidChar, x)
@@ -13,8 +17,81 @@ object Test {
     assert(!y.isValidShort, y)
     assert(y.isValidChar, y)
     assert(y.isValidInt, y)
+    assert(y.isValidFloat, y)
+    assert(y.isValidDouble, y)
+    assert(!y1.isValidLong, y1)
+    assert(!y1.isValidFloat, y1)
+    assert(!y1.isValidDouble, y1)
+    assert(!y2.isValidLong, y2)
+    assert(y2.isValidFloat, y2)
+    assert(y2.isValidDouble, y2)
+
+    testBigIntIsFloat()
+    testBigIntIsDouble()
 
     assert(!l1.isValidInt && (l1 - 1).isValidInt, l1)
     assert(!l2.isValidInt && (l2 + 1).isValidInt, l2)
   }
+
+  def biExp2(e: Int) = BigInt(1) << e
+
+  def testBigIntIsFloat() {
+    val prec = 24
+    def checkFloatT(x: BigInt) = {
+      assert(x.isValidFloat, x)
+      assert((-x).isValidFloat, -x)
+    }
+    def checkFloatF(x: BigInt) = {
+      assert(!x.isValidFloat, x)
+      assert(!(-x).isValidFloat, -x)
+    } 
+    checkFloatT(biExp2(prec) - 1)
+    checkFloatT(biExp2(prec))
+    checkFloatF(biExp2(prec) + 1)
+    checkFloatT(biExp2(prec) + 2)
+    checkFloatT(biExp2(prec) - 2)
+    checkFloatF(biExp2(prec + 1) - 1)
+    checkFloatT(biExp2(prec + 1))
+    checkFloatF(biExp2(prec + 1) + 1)
+    checkFloatF(biExp2(prec + 1) + 2)
+    checkFloatF(biExp2(prec + 1) + 3)
+    checkFloatT(biExp2(prec + 1) + 4)
+    checkFloatT(biExp2(64))
+    checkFloatF(biExp2(64) + biExp2(64 - prec))
+    checkFloatT(biExp2(64) + biExp2(64 - prec + 1))
+    checkFloatT(biExp2(127))
+    checkFloatT(biExp2(128) - biExp2(128 - prec))
+    checkFloatF(biExp2(128) - biExp2(128 - prec - 1))
+    checkFloatF(biExp2(128))
+  }
+
+  def testBigIntIsDouble() {
+    val prec = 53
+    def checkDoubleT(x: BigInt) = {
+      assert(x.isValidDouble, x)
+      assert((-x).isValidDouble, -x)
+    }
+    def checkDoubleF(x: BigInt) = {
+      assert(!x.isValidDouble, x)
+      assert(!(-x).isValidDouble, -x)
+    }
+    checkDoubleT(biExp2(prec) - 1)
+    checkDoubleT(biExp2(prec))
+    checkDoubleF(biExp2(prec) + 1)
+    checkDoubleT(biExp2(prec) + 2)
+    checkDoubleT(biExp2(prec + 1) - 2)
+    checkDoubleF(biExp2(prec + 1) - 1)
+    checkDoubleT(biExp2(prec + 1))
+    checkDoubleF(biExp2(prec + 1) + 1)
+    checkDoubleF(biExp2(prec + 1) + 2)
+    checkDoubleF(biExp2(prec + 1) + 3)
+    checkDoubleT(biExp2(prec + 1) + 4)
+    checkDoubleT(biExp2(64))
+    checkDoubleF(biExp2(64) + biExp2(64 - prec))
+    checkDoubleT(biExp2(64) + biExp2(64 - prec + 1))
+    checkDoubleT(biExp2(1023))
+    checkDoubleT(biExp2(1024) - biExp2(1024 - prec))
+    checkDoubleF(biExp2(1024) - biExp2(1024 - prec - 1))
+    checkDoubleF(biExp2(1024))
+  }
 }
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