func parseInterfaceTypeDefinition(parser *Parser) (*ast.InterfaceDefinition, error) {
start := parser.Token.Start
_, err := expectKeyWord(parser, "interface")
if err != nil {
return nil, err
}
name, err := parseName(parser)
if err != nil {
return nil, err
}
iFields, err := any(parser, lexer.TokenKind[lexer.BRACE_L], parseFieldDefinition, lexer.TokenKind[lexer.BRACE_R])
if err != nil {
return nil, err
}
fields := []*ast.FieldDefinition{}
for _, iField := range iFields {
if iField != nil {
fields = append(fields, iField.(*ast.FieldDefinition))
}
}
return ast.NewInterfaceDefinition(&ast.InterfaceDefinition{
Name: name,
Loc: loc(parser, start),
Fields: fields,
}), nil
}
func TestSchemaParser_SimpleInterface(t *testing.T) {
body := `
interface Hello {
world: String
}`
astDoc := parse(t, body)
expected := ast.NewDocument(&ast.Document{
Loc: testLoc(1, 36),
Definitions: []ast.Node{
ast.NewInterfaceDefinition(&ast.InterfaceDefinition{
Loc: testLoc(1, 36),
Name: ast.NewName(&ast.Name{
Value: "Hello",
Loc: testLoc(11, 16),
}),
Fields: []*ast.FieldDefinition{
ast.NewFieldDefinition(&ast.FieldDefinition{
Loc: testLoc(21, 34),
Name: ast.NewName(&ast.Name{
Value: "world",
Loc: testLoc(21, 26),
}),
Arguments: []*ast.InputValueDefinition{},
Type: ast.NewNamed(&ast.Named{
Loc: testLoc(28, 34),
Name: ast.NewName(&ast.Name{
Value: "String",
Loc: testLoc(28, 34),
}),
}),
}),
},
}),
},
})
if !reflect.DeepEqual(astDoc, expected) {
t.Fatalf("unexpected document, expected: %v, got: %v", expected, astDoc)
}
}