diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
new file mode 100644
index 0000000..be6d795
--- /dev/null
+++ b/.github/workflows/main.yaml
@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    name: Test
+    strategy:
+      matrix:
+        go: ['oldstable', 'stable']
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Golang
+        uses: actions/setup-go@v5
+        with:
+          go-version: '${{ matrix.go }}'
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Test
+        run: |
+          test -z "`gofmt -l -d .`"
+          test -z "`go run golang.org/x/lint/golint@latest ./...`"
+          go test -v --race -covermode=atomic -coverprofile=coverage.out
diff --git a/date.go b/date.go
index 31da0e3..f6d4bb2 100644
--- a/date.go
+++ b/date.go
@@ -25,9 +25,10 @@ type DateRule struct {
 // Date returns a validation rule that checks if a string value is in a format that can be parsed into a date.
 // The format of the date should be specified as the layout parameter which accepts the same value as that for time.Parse.
 // For example,
-//    validation.Date(time.ANSIC)
-//    validation.Date("02 Jan 06 15:04 MST")
-//    validation.Date("2006-01-02")
+//
+//	validation.Date(time.ANSIC)
+//	validation.Date("02 Jan 06 15:04 MST")
+//	validation.Date("2006-01-02")
 //
 // By calling Min() and/or Max(), you can let the Date rule to check if a parsed date value is within
 // the specified date range.
diff --git a/map.go b/map.go
index 106b6d8..b3a87bd 100644
--- a/map.go
+++ b/map.go
@@ -41,10 +41,11 @@ type (
 // Use Key() to specify map keys that need to be validated. Each Key() call specifies a single key which can
 // be associated with multiple rules.
 // For example,
-//    validation.Map(
-//        validation.Key("Name", validation.Required),
-//        validation.Key("Value", validation.Required, validation.Length(5, 10)),
-//    )
+//
+//	validation.Map(
+//	    validation.Key("Name", validation.Required),
+//	    validation.Key("Value", validation.Required, validation.Length(5, 10)),
+//	)
 //
 // A nil value is considered valid. Use the Required rule to make sure a map value is present.
 func Map(keys ...*KeyRules) MapRule {
diff --git a/struct.go b/struct.go
index d63619d..08b63ba 100644
--- a/struct.go
+++ b/struct.go
@@ -47,16 +47,16 @@ func (e ErrFieldNotFound) Error() string {
 // should be specified as a pointer to the field. A field can be associated with multiple rules.
 // For example,
 //
-//    value := struct {
-//        Name  string
-//        Value string
-//    }{"name", "demo"}
-//    err := validation.ValidateStruct(&value,
-//        validation.Field(&a.Name, validation.Required),
-//        validation.Field(&a.Value, validation.Required, validation.Length(5, 10)),
-//    )
-//    fmt.Println(err)
-//    // Value: the length must be between 5 and 10.
+//	value := struct {
+//	    Name  string
+//	    Value string
+//	}{"name", "demo"}
+//	err := validation.ValidateStruct(&value,
+//	    validation.Field(&a.Name, validation.Required),
+//	    validation.Field(&a.Value, validation.Required, validation.Length(5, 10)),
+//	)
+//	fmt.Println(err)
+//	// Value: the length must be between 5 and 10.
 //
 // An error will be returned if validation fails.
 func ValidateStruct(structPtr interface{}, fields ...*FieldRules) error {
diff --git a/validation.go b/validation.go
index ec7a161..0495f32 100644
--- a/validation.go
+++ b/validation.go
@@ -60,11 +60,11 @@ var (
 // Validate validates the given value and returns the validation error, if any.
 //
 // Validate performs validation using the following steps:
-// 1. For each rule, call its `Validate()` to validate the value. Return if any error is found.
-// 2. If the value being validated implements `Validatable`, call the value's `Validate()`.
-//    Return with the validation result.
-// 3. If the value being validated is a map/slice/array, and the element type implements `Validatable`,
-//    for each element call the element value's `Validate()`. Return with the validation result.
+//  1. For each rule, call its `Validate()` to validate the value. Return if any error is found.
+//  2. If the value being validated implements `Validatable`, call the value's `Validate()`.
+//     Return with the validation result.
+//  3. If the value being validated is a map/slice/array, and the element type implements `Validatable`,
+//     for each element call the element value's `Validate()`. Return with the validation result.
 func Validate(value interface{}, rules ...Rule) error {
 	for _, rule := range rules {
 		if s, ok := rule.(skipRule); ok && s.skip {
@@ -103,16 +103,16 @@ func Validate(value interface{}, rules ...Rule) error {
 // ValidateWithContext validates the given value with the given context and returns the validation error, if any.
 //
 // ValidateWithContext performs validation using the following steps:
-// 1. For each rule, call its `ValidateWithContext()` to validate the value if the rule implements `RuleWithContext`.
-//    Otherwise call `Validate()` of the rule. Return if any error is found.
-// 2. If the value being validated implements `ValidatableWithContext`, call the value's `ValidateWithContext()`
-//    and return with the validation result.
-// 3. If the value being validated implements `Validatable`, call the value's `Validate()`
-//    and return with the validation result.
-// 4. If the value being validated is a map/slice/array, and the element type implements `ValidatableWithContext`,
-//    for each element call the element value's `ValidateWithContext()`. Return with the validation result.
-// 5. If the value being validated is a map/slice/array, and the element type implements `Validatable`,
-//    for each element call the element value's `Validate()`. Return with the validation result.
+//  1. For each rule, call its `ValidateWithContext()` to validate the value if the rule implements `RuleWithContext`.
+//     Otherwise call `Validate()` of the rule. Return if any error is found.
+//  2. If the value being validated implements `ValidatableWithContext`, call the value's `ValidateWithContext()`
+//     and return with the validation result.
+//  3. If the value being validated implements `Validatable`, call the value's `Validate()`
+//     and return with the validation result.
+//  4. If the value being validated is a map/slice/array, and the element type implements `ValidatableWithContext`,
+//     for each element call the element value's `ValidateWithContext()`. Return with the validation result.
+//  5. If the value being validated is a map/slice/array, and the element type implements `Validatable`,
+//     for each element call the element value's `Validate()`. Return with the validation result.
 func ValidateWithContext(ctx context.Context, value interface{}, rules ...Rule) error {
 	for _, rule := range rules {
 		if s, ok := rule.(skipRule); ok && s.skip {