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// Copyright (c) 2012, 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.
// Test switch statement.
import "package:expect/expect.dart";
class Switcher {
Switcher() {}
test1(val) {
var x = 0;
switch (val) {
case 1:
x = 100;
break;
case 2:
case 3:
x = 200;
break;
case 4:
default:
{
x = 400;
break;
}
}
return x;
}
test2(val) {
switch (val) {
case 1:
return 200;
default:
return 400;
}
}
}
class SwitchTest {
static testMain() {
Switcher s = new Switcher();
Expect.equals(100, s.test1(1));
Expect.equals(200, s.test1(2));
Expect.equals(200, s.test1(3));
Expect.equals(400, s.test1(4));
Expect.equals(400, s.test1(5));
Expect.equals(200, s.test2(1));
Expect.equals(400, s.test2(2));
}
}
class Enum {
static const Enum e1 = const Enum(1);
static const Enum e2 = const Enum(2);
static const Enum e3 = const Enum(3);
final int id;
const Enum(this.id);
}
void testSwitchEnum(Enum? input, int expect) {
int? result = null;
switch (input) {
case Enum.e1:
result = 10;
break;
case Enum.e2:
result = 20;
break;
case Enum.e3:
result = 30;
break;
default:
result = 40;
}
Expect.equals(expect, result);
}
const int ic1 = 1;
const int ic2 = 2;
void testSwitchIntExpression(int input, int? expect) {
int? result = null;
switch (input) {
case 1 + 1: // 2
case ic1 + 2: // 3
result = 11;
break;
case ic2 * 2: // 4
case 1 * 5: // 5
result = 21;
break;
case ic1 % ic2 + 5: // 6
result = 31;
break;
}
Expect.equals(expect, result);
}
void testSwitchBool(bool input, int expect) {
int? result = null;
switch (input) {
case true:
result = 12;
break;
case false:
result = 22;
}
Expect.equals(expect, result);
}
void testSwitchString(String? input, int? expect) {
int? result = null;
switch (input) {
case 'one':
result = 1;
break;
case 'two':
result = 2;
break;
}
Expect.equals(expect, result);
}
switchConstString() {
const c = 'a';
switch (c) {
case 'a':
return 'aa';
case 'b':
return 'bb';
case 'c':
return 'cc';
case 'd':
return 'dd';
case 'e':
return 'ee';
case 'f':
return 'ff';
}
}
main() {
SwitchTest.testMain();
testSwitchEnum(Enum.e1, 10);
testSwitchEnum(Enum.e2, 20);
testSwitchEnum(Enum.e3, 30);
testSwitchEnum(null, 40);
testSwitchIntExpression(2, 11);
testSwitchIntExpression(3, 11);
testSwitchIntExpression(4, 21);
testSwitchIntExpression(5, 21);
testSwitchIntExpression(6, 31);
testSwitchIntExpression(7, null);
testSwitchBool(true, 12);
testSwitchBool(false, 22);
testSwitchString(null, null);
testSwitchString('one', 1);
testSwitchString('two', 2);
testSwitchString('three', null);
Expect.equals('aa', switchConstString());
}