import 'package:graphql_parser/graphql_parser.dart'; import 'package:matcher/matcher.dart'; import 'package:test/test.dart'; import 'argument_test.dart'; import 'common.dart'; main() { test('name only', () { expect('@foo', isDirective('foo')); }); test('with value or variable', () { expect('@foo: 2', isDirective('foo', valueOrVariable: equals(2))); expect(r'@foo: $bar', isDirective('foo', valueOrVariable: equals('bar'))); }); test('with argument', () { expect('@foo (bar: 2)', isDirective('foo', argument: isArgument('bar', 2))); expect(r'@foo (bar: $baz)', isDirective('foo', argument: isArgument('bar', r'baz'))); }); test('exceptions', () { var isSyntaxError = predicate((x) { var parser = parse(x.toString())..parseDirective(); return parser.errors.isNotEmpty; }, 'fails to parse directive'); expect('@', isSyntaxError); expect('@foo:', isSyntaxError); expect('@foo (', isSyntaxError); expect('@foo (bar: 2', isSyntaxError); expect('@foo (', isSyntaxError); }); } DirectiveContext parseDirective(String text) => parse(text).parseDirective(); Matcher isDirective(String name, {Matcher valueOrVariable, Matcher argument}) => _IsDirective(name, valueOrVariable: valueOrVariable, argument: argument); Matcher isDirectiveList(List directives) => _IsDirectiveList(directives); class _IsDirective extends Matcher { final String name; final Matcher valueOrVariable, argument; _IsDirective(this.name, {this.valueOrVariable, this.argument}); @override Description describe(Description description) { var desc = description.add('is a directive with name "$name"'); if (valueOrVariable != null) { return valueOrVariable.describe(desc.add(' and ')); } else if (argument != null) { return argument.describe(desc.add(' and ')); } else { return desc; } } @override bool matches(item, Map matchState) { var directive = item is DirectiveContext ? item : parseDirective(item.toString()); if (directive == null) return false; if (valueOrVariable != null) { if (directive.value == null) { return false; } else { var v = directive.value; if (v is VariableContext) { return valueOrVariable.matches(v.name, matchState); } else { return valueOrVariable.matches( directive.value.computeValue({}), matchState); } } } else if (argument != null) { if (directive.argument == null) { return false; } else { return argument.matches(directive.argument, matchState); } } else { return true; } } } class _IsDirectiveList extends Matcher { final List directives; _IsDirectiveList(this.directives); @override Description describe(Description description) { return description.add('is list of ${directives.length} directive(s)'); } @override bool matches(item, Map matchState) { var args = item is List ? item : parse(item.toString()).parseDirectives(); if (args.length != directives.length) return false; for (int i = 0; i < args.length; i++) { if (!directives[i].matches(args[i], matchState)) return false; } return true; } }