ADD: Check for special characters in a string

Author: binkkatal

regex/rstring/string.go

@@ -41,3 +41,10 @@ func SplitString(n int, strs ...string) []string {
 
 return split
 }
+
+// ContainsSpecialChars checks for special characters.
+func ContainsSpecialChars(s string) bool {
+isStringAlphabetic := regexp.MustCompile(`^[a-zA-Z0-9]*$`).MatchString
+
+return !isStringAlphabetic(s)
+}

regex/rstring/string_test.go

@@ -77,3 +77,28 @@ func ExampleSplitString_other() {
 fmt.Println(rstring.SplitString(-1, "mango is fruit"))
 // Output: [mango is fruit]
 }
+
+func TestContainsSpecialChars(t *testing.T) {
+type test struct {
+input string
+result bool
+}
+
+tests := []test{{input: "abc", result: false}}
+chars := "!/*-+_@&$#%"
+
+for _, v := range chars {
+tests = append(tests, test{input: string(v), result: true})
+}
+
+for _, tc := range tests {
+tc := tc
+t.Run(tc.input, func(t *testing.T) {
+result := rstring.ContainsSpecialChars(tc.input)
+if result != tc.result {
+t.Errorf("ContainsSpecialChars(%s) Failed: expected %+v, actual %+v",
+tc.input, tc.result, result)
+}
+})
+}
+}