Refactor pkg/common, Fixes #11599

Signed-off-by: Antonio Murdaca <me@runcom.ninja>

stringutils/stringutils_test.go

@@ -0,0 +1,25 @@
+package stringutils
+
+import "testing"
+
+func TestRandomString(t *testing.T) {
+	str := GenerateRandomString()
+	if len(str) != 64 {
+		t.Fatalf("Id returned is incorrect: %s", str)
+	}
+}
+
+func TestRandomStringUniqueness(t *testing.T) {
+	repeats := 25
+	set := make(map[string]struct{}, repeats)
+	for i := 0; i < repeats; i = i + 1 {
+		str := GenerateRandomString()
+		if len(str) != 64 {
+			t.Fatalf("Id returned is incorrect: %s", str)
+		}
+		if _, ok := set[str]; ok {
+			t.Fatalf("Random number is repeated")
+		}
+		set[str] = struct{}{}
+	}
+}