Added some helpers

.travis.yml

@@ -0,0 +1,6 @@
+language: go
+
+go:
+  - 1.5
+  - 1.6
+  - tip

go_helpers_suite_test.go

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

slice.go

@@ -0,0 +1,21 @@
+package helpers
+
+// AppendIfMissing adds a string to a slice when it's not present yet
+func AppendIfMissing(slice []string, s string) []string {
+	for _, e := range slice {
+		if e == s {
+			return slice
+		}
+	}
+	return append(slice, s)
+}
+
+// StringInSlice checks for the existence of a string in the slice
+func StringInSlice(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}

slice_test.go

@@ -0,0 +1,52 @@
+package helpers_test
+
+import (
+	. "github.com/Luzifer/go_helpers"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Slice", func() {
+
+	Context("AppendIfMissing", func() {
+		var sl = []string{
+			"test1",
+			"test2",
+			"test3",
+		}
+
+		It("should not append existing elements", func() {
+			Expect(len(AppendIfMissing(sl, "test1"))).To(Equal(3))
+			Expect(len(AppendIfMissing(sl, "test2"))).To(Equal(3))
+			Expect(len(AppendIfMissing(sl, "test3"))).To(Equal(3))
+		})
+
+		It("should append not existing elements", func() {
+			Expect(len(AppendIfMissing(sl, "test4"))).To(Equal(4))
+			Expect(len(AppendIfMissing(sl, "test5"))).To(Equal(4))
+			Expect(len(AppendIfMissing(sl, "test6"))).To(Equal(4))
+		})
+	})
+
+	Context("StringInSlice", func() {
+		var sl = []string{
+			"test1",
+			"test2",
+			"test3",
+		}
+
+		It("should find elements of slice", func() {
+			Expect(StringInSlice("test1", sl)).To(Equal(true))
+			Expect(StringInSlice("test2", sl)).To(Equal(true))
+			Expect(StringInSlice("test3", sl)).To(Equal(true))
+		})
+
+		It("should not find elements not in slice", func() {
+			Expect(StringInSlice("test4", sl)).To(Equal(false))
+			Expect(StringInSlice("test5", sl)).To(Equal(false))
+			Expect(StringInSlice("test6", sl)).To(Equal(false))
+		})
+	})
+
+})