feat: Adds ProvidedRequiredArgumentsOnDirectivesRule

Sources/GraphQL/Validation/Rules/ProvidedRequiredArgumentsOnDirectivesRule.swift

@@ -0,0 +1,64 @@
+
+func ProvidedRequiredArgumentsOnDirectivesRule(
+    context: SDLorNormalValidationContext
+) -> Visitor {
+    var requiredArgsMap = [String: [String: String]]()
+
+    let schema = context.getSchema()
+    let definedDirectives = schema?.directives ?? specifiedDirectives
+    for directive in definedDirectives {
+        var requiredArgs = [String: String]()
+        for arg in directive.args.filter({ isRequiredArgument($0) }) {
+            requiredArgs[arg.name] = arg.type.debugDescription
+        }
+        requiredArgsMap[directive.name] = requiredArgs
+    }
+
+    let astDefinitions = context.ast.definitions
+    for def in astDefinitions {
+        if let def = def as? DirectiveDefinition {
+            let argNodes = def.arguments
+            var requiredArgs = [String: String]()
+            for arg in argNodes.filter({ isRequiredArgumentNode($0) }) {
+                requiredArgs[arg.name.value] = print(ast: arg.type)
+            }
+            requiredArgsMap[def.name.value] = requiredArgs
+        }
+    }
+
+    return Visitor(
+        // Validate on leave to allow for deeper errors to appear first.
+        leave: { node, _, _, _, _ in
+            if let directiveNode = node as? Directive {
+                let directiveName = directiveNode.name.value
+                if let requiredArgs = requiredArgsMap[directiveName] {
+                    let argNodes = directiveNode.arguments
+                    let argNodeMap = Set(argNodes.map(\.name.value))
+                    for (argName, argType) in requiredArgs {
+                        if !argNodeMap.contains(argName) {
+                            context.report(
+                                error: GraphQLError(
+                                    message: "Argument \"@\(directiveName)(\(argName):)\" of type \"\(argType)\" is required, but it was not provided.",
+                                    nodes: [directiveNode]
+                                )
+                            )
+                        }
+                    }
+                }
+            }
+            return .continue
+        }
+    )
+}
+
+func isRequiredArgumentNode(
+    arg: InputValueDefinition
+) -> Bool {
+    return arg.type.kind == .nonNullType && arg.defaultValue == nil
+}
+
+func isRequiredArgumentNode(
+    arg: VariableDefinition
+) -> Bool {
+    return arg.type.kind == .nonNullType && arg.defaultValue == nil
+}

Sources/GraphQL/Validation/SpecifiedRules.swift

@@ -51,5 +51,5 @@ public let specifiedSDLRules: [SDLValidationRule] = [
     KnownArgumentNamesOnDirectivesRule,
     UniqueArgumentNamesRule,
     UniqueInputFieldNamesRule,
-//    ProvidedRequiredArgumentsOnDirectivesRule,
+    ProvidedRequiredArgumentsOnDirectivesRule,
 ]

Tests/GraphQLTests/ValidationTests/ProvidedRequiredArgumentsOnDirectivesRuleTests.swift

@@ -0,0 +1,118 @@
+@testable import GraphQL
+import XCTest
+
+class ProvidedRequiredArgumentsOnDirectivesRuleTests: SDLValidationTestCase {
+    override func setUp() {
+        rule = ProvidedRequiredArgumentsOnDirectivesRule
+    }
+
+    func testMissingOptionalArgsOnDirectiveDefinedInsideSDL() throws {
+        try assertValidationErrors(
+            """
+            type Query {
+              foo: String @test
+            }
+
+            directive @test(arg1: String, arg2: String! = "") on FIELD_DEFINITION
+            """,
+            []
+        )
+    }
+
+    func testMissingArgOnDirectiveDefinedInsideSDL() throws {
+        try assertValidationErrors(
+            """
+            type Query {
+              foo: String @test
+            }
+
+            directive @test(arg: String!) on FIELD_DEFINITION
+            """,
+            [
+                GraphQLError(
+                    message: #"Argument "@test(arg:)" of type "String!" is required, but it was not provided."#,
+                    locations: [.init(line: 2, column: 15)]
+                ),
+            ]
+        )
+    }
+
+    func testMissingArgOnStandardDirective() throws {
+        try assertValidationErrors(
+            """
+            type Query {
+              foo: String @include
+            }
+            """,
+            [
+                GraphQLError(
+                    message: #"Argument "@include(if:)" of type "Boolean!" is required, but it was not provided."#,
+                    locations: [.init(line: 2, column: 15)]
+                ),
+            ]
+        )
+    }
+
+    func testMissingArgOnOveriddenStandardDirective() throws {
+        try assertValidationErrors(
+            """
+            type Query {
+              foo: String @deprecated
+            }
+            directive @deprecated(reason: String!) on FIELD
+            """,
+            [
+                GraphQLError(
+                    message: #"Argument "@deprecated(reason:)" of type "String!" is required, but it was not provided."#,
+                    locations: [.init(line: 2, column: 15)]
+                ),
+            ]
+        )
+    }
+
+    func testMissingArgOnDirectiveDefinedInSchemaExtension() throws {
+        let schema = try buildSchema(source: """
+        type Query {
+          foo: String
+        }
+        """)
+        let sdl = """
+        directive @test(arg: String!) on OBJECT
+
+        extend type Query  @test
+        """
+        try assertValidationErrors(
+            sdl,
+            schema: schema,
+            [
+                GraphQLError(
+                    message: #"Argument "@test(arg:)" of type "String!" is required, but it was not provided."#,
+                    locations: [.init(line: 3, column: 20)]
+                ),
+            ]
+        )
+    }
+
+    func testMissingArgOnDirectiveUsedInSchemaExtension() throws {
+        let schema = try buildSchema(source: """
+        directive @test(arg: String!) on OBJECT
+
+        type Query {
+          foo: String
+        }
+        """)
+        let sdl = """
+        extend type Query @test
+        """
+        try assertValidationErrors(
+            sdl,
+            schema: schema,
+            [
+                GraphQLError(
+                    message: #"Argument "@test(arg:)" of type "String!" is required, but it was not provided."#,
+                    locations: [.init(line: 1, column: 19)]
+                ),
+            ]
+        )
+    }
+}