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 // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. // Dart test program to test operation precedence. library precedence_test; import "package:expect/expect.dart"; main() { testBang(); testIndexWithPrefixAdd(); testIndexWithPostfixAdd(); testTilde(); testUnaryPrefixWithAdd(); testUnaryPostfixWithAdd(); testUnaryPrefixWithMultiply(); testUnaryPostfixWithMultiply(); } void testBang() { int x = 3; Expect.equals(!true == false, true); Expect.equals(!x.isEven, true); Expect.equals(!(++x).isEven, false); Expect.equals(x, 4); Expect.equals(!(x++).isEven, false); Expect.equals(x, 5); } void testIndexWithPrefixAdd() { var x = [3]; Expect.equals(++x[0] + 3, 7); Expect.equals(x[0], 4); Expect.equals(++x[0] - 3, 2); Expect.equals(x[0], 5); Expect.equals(--x[0] + 4, 8); Expect.equals(x[0], 4); Expect.equals(--x[0] - 4, -1); Expect.equals(x[0], 3); Expect.equals(3 + ++x[0], 7); Expect.equals(x[0], 4); Expect.equals(3 - ++x[0], -2); Expect.equals(x[0], 5); Expect.equals(4 + --x[0], 8); Expect.equals(x[0], 4); Expect.equals(4 - --x[0], 1); Expect.equals(x[0], 3); } void testIndexWithPostfixAdd() { var x = [3]; Expect.equals(x[0]++ + 3, 6); Expect.equals(x[0], 4); Expect.equals(x[0]++ - 3, 1); Expect.equals(x[0], 5); Expect.equals(x[0]-- + 4, 9); Expect.equals(x[0], 4); Expect.equals(x[0]-- - 4, 0); Expect.equals(x[0], 3); Expect.equals(3 + x[0]++, 6); Expect.equals(x[0], 4); Expect.equals(3 - x[0]++, -1); Expect.equals(x[0], 5); Expect.equals(4 + x[0]--, 9); Expect.equals(x[0], 4); Expect.equals(4 - x[0]--, 0); Expect.equals(x[0], 3); } void testTilde() { int x = 3; Expect.equals(~x.sign, ~(x.sign)); Expect.equals(~x + 7, (~3) + 7); Expect.equals(~++x + 7, (~4) + 7); Expect.equals(x, 4); Expect.equals(~x++ + 7, (~4) + 7); Expect.equals(x, 5); Expect.equals(~ --x + 7, (~4) + 7); Expect.equals(x, 4); Expect.equals(~x-- + 7, (~4) + 7); Expect.equals(x, 3); } void testUnaryPrefixWithAdd() { int x = 3; Expect.equals(++x + 3, 7); Expect.equals(x, 4); Expect.equals(++x - 3, 2); Expect.equals(x, 5); Expect.equals(--x + 4, 8); Expect.equals(x, 4); Expect.equals(--x - 4, -1); Expect.equals(x, 3); Expect.equals(3 + ++x, 7); Expect.equals(x, 4); Expect.equals(3 - ++x, -2); Expect.equals(x, 5); Expect.equals(4 + --x, 8); Expect.equals(x, 4); Expect.equals(4 - --x, 1); Expect.equals(x, 3); } void testUnaryPostfixWithAdd() { int x = 3; Expect.equals(x++ + 3, 6); Expect.equals(x, 4); Expect.equals(x++ - 3, 1); Expect.equals(x, 5); Expect.equals(x-- + 4, 9); Expect.equals(x, 4); Expect.equals(x-- - 4, 0); Expect.equals(x, 3); Expect.equals(3 + x++, 6); Expect.equals(x, 4); Expect.equals(3 - x++, -1); Expect.equals(x, 5); Expect.equals(4 + x--, 9); Expect.equals(x, 4); Expect.equals(4 - x--, 0); Expect.equals(x, 3); } void testUnaryPrefixWithMultiply() { int x = 3; Expect.equals(++x * 3, 12); Expect.equals(x, 4); Expect.equals(++x / 5, 1.0); Expect.equals(x, 5); Expect.equals(--x * 3, 12); Expect.equals(x, 4); Expect.equals(--x / 4, 0.75); Expect.equals(x, 3); Expect.equals(3 * ++x, 12); Expect.equals(x, 4); Expect.equals(5 / ++x, 1.0); Expect.equals(x, 5); Expect.equals(3 * --x, 12); Expect.equals(x, 4); Expect.equals(6 / --x, 2.0); Expect.equals(x, 3); } void testUnaryPostfixWithMultiply() { int x = 3; Expect.equals(x++ * 3, 9); Expect.equals(x, 4); Expect.equals(x++ / 4, 1.0); Expect.equals(x, 5); Expect.equals(x-- * 3, 15); Expect.equals(x, 4); Expect.equals(x-- / 4, 1.0); Expect.equals(x, 3); Expect.equals(3 * x++, 9); Expect.equals(x, 4); Expect.equals(3 / x++, 0.75); Expect.equals(x, 5); Expect.equals(4 * x--, 20); Expect.equals(x, 4); Expect.equals(4 / x--, 1.0); Expect.equals(x, 3); }