1 files changed, 73 insertions, 0 deletions
diff --git a/examples/scala-js/test-suite/src/test/scala/scala/scalajs/testsuite/compiler/FloatTest.scala b/examples/scala-js/test-suite/src/test/scala/scala/scalajs/testsuite/compiler/FloatTest.scala
new file mode 100644
index 0000000..5eda04a
--- /dev/null
+++ b/examples/scala-js/test-suite/src/test/scala/scala/scalajs/testsuite/compiler/FloatTest.scala
@@ -0,0 +1,73 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___      __ ____  Scala.js Test Suite        **
+**    / __/ __// _ | / /  / _ | __ / // __/  (c) 2013, LAMP/EPFL        **
+**  __\ \/ /__/ __ |/ /__/ __ |/_// /_\ \    http://scala-js.org/       **
+** /____/\___/_/ |_/____/_/ | |__/ /____/                               **
+**                          |/____/                                     **
+\*                                                                      */
+package scala.scalajs.testsuite.compiler
+
+import org.scalajs.jasminetest.JasmineTest
+
+object FloatTest extends JasmineTest {
+
+  def froundNotInlined(x: Double): Float = {
+    val y = x // so you don't inline me
+    y.toFloat
+  }
+
+  when("strict-floats").
+  describe("Strict floats") {
+
+    it("fround for special values") {
+      expect(froundNotInlined(Double.NaN).isNaN).toBeTruthy
+      expect(1 / froundNotInlined(0.0).toDouble).toBe(Double.PositiveInfinity)
+      expect(1 / froundNotInlined(-0.0).toDouble).toBe(Double.NegativeInfinity)
+      expect(froundNotInlined(Double.PositiveInfinity)).toBe(Float.PositiveInfinity)
+      expect(froundNotInlined(Double.NegativeInfinity)).toBe(Float.NegativeInfinity)
+    }
+
+    it("fround overflows") {
+      expect(froundNotInlined(1e200)).toBe(Double.PositiveInfinity)
+      expect(froundNotInlined(-1e200)).toBe(Double.NegativeInfinity)
+    }
+
+    it("fround underflows") {
+      expect(1 / froundNotInlined(1e-300).toDouble).toBe(Double.PositiveInfinity)
+      expect(1 / froundNotInlined(-1e-300).toDouble).toBe(Double.NegativeInfinity)
+    }
+
+    it("fround normal cases") {
+      def test(input: Double, expected: Double): Unit =
+        expect(input.toFloat.toDouble).toBe(expected)
+
+      // From MDN documentation
+      test(0.0, 0.0)
+      test(1.0, 1.0)
+      test(1.5, 1.5)
+      test(1.337, 1.3370000123977661)
+      test(-4.3, -4.300000190734863)
+
+      // Some bounds
+      test(Float.MinPositiveValue.toDouble, Float.MinPositiveValue.toDouble)
+      test(Float.MaxValue.toDouble, Float.MaxValue.toDouble)
+      test(Float.MinValue.toDouble, Float.MinValue.toDouble)
+
+      // Randomly generated Doubles
+      test(2.705609035558863E20, 2.7056090763400262E20)
+      test(-1.447710531503027E15, -1.447710532042752E15)
+      test(-5.1970024617732836E13, -5.1970022834176E13)
+      test(1.627661085098256E31, 1.6276610930768024E31)
+      test(-3.7731947682593834E-32, -3.7731946313230934E-32)
+      test(34.48229849163326, 34.4822998046875)
+      test(26.62034396181652, 26.620344161987305)
+      test(8.198435190113375E-24, 8.198434961596576E-24)
+      test(-6.079928908440255E-23, -6.079928963558556E-23)
+      test(3.3756949828462674E-13, 3.37569490589662E-13)
+      test(-1.2599049874324274E33, -1.2599049641449257E33)
+      test(6.08574575776438E-10, 6.085745796191588E-10)
+      test(1.973497969450596E-21, 1.973498047135062E-21)
+    }
+
+  }
+}