Added float helpers, moved helpers to subpackages

float/float_suite_test.go

@@ -1,4 +1,4 @@
-package helpers_test
+package float_test
 
 import (
 	. "github.com/onsi/ginkgo"
@@ -7,7 +7,7 @@ import (
 	"testing"
 )
 
-func TestGoHelpers(t *testing.T) {
+func TestFloat(t *testing.T) {
 	RegisterFailHandler(Fail)
-	RunSpecs(t, "GoHelpers Suite")
+	RunSpecs(t, "Float Suite")
 }

float/round.go

@@ -0,0 +1,14 @@
+package float
+
+import "math"
+
+// Round returns a float rounded according to "Round to nearest, ties away from zero" IEEE floaing point rounding rule
+func Round(x float64) float64 {
+	var absx, y float64
+	absx = math.Abs(x)
+	y = math.Floor(absx)
+	if absx-y >= 0.5 {
+		y += 1.0
+	}
+	return math.Copysign(y, x)
+}

float/round_test.go

@@ -0,0 +1,35 @@
+package float_test
+
+import (
+	"math"
+
+	. "github.com/Luzifer/go_helpers/float"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Round", func() {
+
+	It("should match the example table of IEEE 754 rules", func() {
+		Expect(Round(11.5)).To(Equal(12.0))
+		Expect(Round(12.5)).To(Equal(13.0))
+		Expect(Round(-11.5)).To(Equal(-12.0))
+		Expect(Round(-12.5)).To(Equal(-13.0))
+	})
+
+	It("should have correct rounding for numbers near 0.5", func() {
+		Expect(Round(0.499999999997)).To(Equal(0.0))
+		Expect(Round(-0.499999999997)).To(Equal(0.0))
+	})
+
+	It("should be able to handle +/-Inf", func() {
+		Expect(Round(math.Inf(1))).To(Equal(math.Inf(1)))
+		Expect(Round(math.Inf(-1))).To(Equal(math.Inf(-1)))
+	})
+
+	It("should be able to handle NaN", func() {
+		Expect(math.IsNaN(Round(math.NaN()))).To(Equal(true))
+	})
+
+})

str/slice.go

@@ -1,4 +1,4 @@
-package helpers
+package str
 
 // AppendIfMissing adds a string to a slice when it's not present yet
 func AppendIfMissing(slice []string, s string) []string {

str/slice_test.go

@@ -1,7 +1,7 @@
-package helpers_test
+package str_test
 
 import (
-	. "github.com/Luzifer/go_helpers"
+	. "github.com/Luzifer/go_helpers/str"
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"

str/str_suite_test.go

@@ -0,0 +1,13 @@
+package str_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+func TestStr(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Str Suite")
+}