test: add examples for random package

random/random_example_test.go

@@ -0,0 +1,126 @@
+package random
+
+import (
+	"fmt"
+	"regexp"
+)
+
+func ExampleRandInt() {
+
+	result := RandInt(1, 10)
+
+	if result >= 1 && result < 10 {
+		fmt.Println("ok")
+	}
+
+	// Output:
+	// ok
+}
+
+func ExampleRandBytes() {
+	bytes := RandBytes(4)
+
+	fmt.Println(len(bytes))
+
+	// Output:
+	// 4
+}
+
+func ExampleRandString() {
+	pattern := `^[a-zA-Z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	s := RandString(6)
+
+	result1 := reg.MatchString(s)
+	result2 := len(s)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// 6
+}
+
+func ExampleRandUpper() {
+	pattern := `^[A-Z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	s := RandUpper(6)
+
+	result1 := reg.MatchString(s)
+	result2 := len(s)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// 6
+}
+
+func ExampleRandLower() {
+	pattern := `^[a-z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	s := RandLower(6)
+
+	result1 := reg.MatchString(s)
+	result2 := len(s)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// 6
+}
+
+func ExampleRandNumeral() {
+	pattern := `^[0-9]+$`
+	reg := regexp.MustCompile(pattern)
+
+	s := RandNumeral(6)
+
+	result1 := reg.MatchString(s)
+	result2 := len(s)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// 6
+}
+
+func ExampleRandNumeralOrLetter() {
+	pattern := `^[0-9a-zA-Z]+$`
+	reg := regexp.MustCompile(pattern)
+
+	s := RandNumeralOrLetter(6)
+
+	result1 := reg.MatchString(s)
+	result2 := len(s)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// 6
+}
+
+func ExampleUUIdV4() {
+	pattern := `^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$`
+	reg := regexp.MustCompile(pattern)
+
+	s, _ := UUIdV4()
+
+	result := reg.MatchString(s)
+
+	fmt.Println(result)
+
+	// Output:
+	// true
+}