OCM-5397 | feat: add truncate common function

pkg/aws/utils/utils.go

@@ -4,6 +4,7 @@ import (
 	"strings"
 
 	"github.com/aws/aws-sdk-go-v2/aws/arn"
+	commonUtils "github.com/openshift-online/ocm-common/pkg/utils"
 )
 
 func GetPathFromArn(arnStr string) (string, error) {
@@ -20,3 +21,7 @@ func GetPathFromArn(arnStr string) (string, error) {
 	path := resource[firstIndex : lastIndex+1]
 	return path, nil
 }
+
+func TruncateRoleName(name string) string {
+	return commonUtils.Truncate(name, commonUtils.MaxByteSize)
+}

pkg/aws/utils/utils_test.go

@@ -25,4 +25,18 @@ var _ = Describe("AWS Utils", func() {
 			Expect(err).To(HaveOccurred())
 		})
 	})
+
+	var _ = Describe("Validates TruncateRoleName function", func() {
+		It("Doesn't do anything", func() {
+			smallerThanByteInLength := "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+			truncated := TruncateRoleName(smallerThanByteInLength)
+			Expect(smallerThanByteInLength).To(Equal(truncated))
+		})
+		It("Truncate when bigger than 64", func() {
+			smallerThanByteInLength := "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+			truncated := TruncateRoleName(smallerThanByteInLength)
+			Expect(len(truncated)).To(Equal(64))
+			Expect(smallerThanByteInLength).To(Equal(truncated + "a"))
+		})
+	})
 })

pkg/utils/utils.go

@@ -38,3 +38,10 @@ func RandomLabel(size int) string {
 	}
 	return string(chars)
 }
+
+func Truncate(s string, truncateLength int) string {
+	if len(s) > truncateLength {
+		s = s[0:truncateLength]
+	}
+	return s
+}

pkg/utils/utils_test.go

@@ -27,4 +27,17 @@ var _ = Describe("Utils", func() {
 			})
 		})
 	})
+	var _ = Describe("Validates Truncate function", func() {
+		It("Doesn't do anything", func() {
+			smallerThanByteInLength := "aaaaa"
+			truncated := Truncate(smallerThanByteInLength, 5)
+			Expect(smallerThanByteInLength).To(Equal(truncated))
+		})
+		It("Truncate when bigger than supplied value", func() {
+			smallerThanByteInLength := "aaaaaa"
+			truncated := Truncate(smallerThanByteInLength, 5)
+			Expect(len(truncated)).To(Equal(5))
+			Expect(smallerThanByteInLength).To(Equal(truncated + "a"))
+		})
+	})
 })