feature: all argument

example_test.go

@@ -659,6 +659,41 @@ func ExampleAtLeastOneOf() {
 	// violation at 'brands': This value should not be blank.
 }
 
+func ExampleAll() {
+	book := struct {
+		Name string
+		Tags []string
+	}{
+		Name: "Very long book name",
+		Tags: []string{"Fiction", "Thriller", "Science", "Fantasy"},
+	}
+
+	err := validator.Validate(
+		context.Background(),
+		validation.Sequentially(
+			// this block passes
+			validation.All(
+				validation.StringProperty("name", book.Name, it.IsNotBlank()),
+				validation.CountableProperty("tags", len(book.Tags), it.IsNotBlank()),
+			),
+			// this block fails
+			validation.All(
+				validation.StringProperty("name", book.Name, it.HasMaxLength(10)),
+				validation.CountableProperty("tags", len(book.Tags), it.HasMaxCount(3)),
+			),
+		),
+	)
+
+	if violations, ok := validation.UnwrapViolationList(err); ok {
+		for violation := violations.First(); violation != nil; violation = violation.Next() {
+			fmt.Println(violation)
+		}
+	}
+	// Output:
+	// violation at 'name': This value is too long. It should have 10 characters or less.
+	// violation at 'tags': This collection should contain 3 elements or less.
+}
+
 func ExampleValidator_Validate_basicValidation() {
 	s := ""
 

flow_control.go

@@ -194,3 +194,48 @@ func (arg AtLeastOneOfArgument) setUp(ctx *executionContext) {
 		return violations, nil
 	})
 }
+
+// AllArgument can be used to interrupt validation process when the first violation is raised.
+type AllArgument struct {
+	isIgnored bool
+	options   []Option
+	arguments []Argument
+}
+
+// All runs validation for each argument. It works exactly as validator.Validate method.
+// It can be helpful to build complex validation process.
+func All(arguments ...Argument) AllArgument {
+	return AllArgument{arguments: arguments}
+}
+
+// With returns a copy of AllArgument with appended options.
+func (arg AllArgument) With(options ...Option) AllArgument {
+	arg.options = append(arg.options, options...)
+	return arg
+}
+
+// When enables conditional validation of this argument. If the expression evaluates to false,
+// then the argument will be ignored.
+func (arg AllArgument) When(condition bool) AllArgument {
+	arg.isIgnored = !condition
+	return arg
+}
+
+func (arg AllArgument) setUp(ctx *executionContext) {
+	ctx.addValidator(arg.options, func(scope Scope) (*ViolationList, error) {
+		if arg.isIgnored {
+			return nil, nil
+		}
+
+		violations := &ViolationList{}
+
+		for _, argument := range arg.arguments {
+			err := violations.AppendFromError(scope.Validate(argument))
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		return violations, nil
+	})
+}

test/flow_control_test.go

@@ -212,3 +212,45 @@ func TestAtLeastOneOfArgument_WhenValidationIsDisabled_ExpectNoError(t *testing.
 
 	assert.NoError(t, err)
 }
+
+func TestAllArgument_WhenInvalidValueAtFirstConstraint_ExpectAllViolations(t *testing.T) {
+	err := newValidator(t).Validate(
+		context.Background(),
+		validation.All(
+			validation.String("", it.IsNotBlank().Code("first")),
+			validation.String("", it.IsNotBlank().Code("second")),
+		),
+	)
+
+	validationtest.Assert(t, err).IsViolationList().WithCodes("first", "second")
+}
+
+func TestAllArgument_WhenPathIsSet_ExpectOneViolationWithPath(t *testing.T) {
+	err := newValidator(t).Validate(
+		context.Background(),
+		validation.All(
+			validation.String("", it.IsNotBlank().Code("first")),
+			validation.String("", it.IsNotBlank().Code("second")),
+		).With(
+			validation.PropertyName("properties"),
+			validation.ArrayIndex(0),
+			validation.PropertyName("property"),
+		),
+	)
+
+	violations := validationtest.Assert(t, err).IsViolationList()
+	violations.HasViolationAt(0).WithCode("first").WithPropertyPath("properties[0].property")
+	violations.HasViolationAt(1).WithCode("second").WithPropertyPath("properties[0].property")
+}
+
+func TestAllArgument_WhenValidationIsDisabled_ExpectNoErrors(t *testing.T) {
+	err := newValidator(t).Validate(
+		context.Background(),
+		validation.All(
+			validation.String("", it.IsNotBlank().Code("first")),
+			validation.String("", it.IsNotBlank().Code("second")),
+		).When(false),
+	)
+
+	assert.NoError(t, err)
+}