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AliasTests.cs
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AliasTests.cs
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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* ironruby@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using IronRuby.Compiler;
using IronRuby.Compiler.Ast;
namespace IronRuby.Tests {
public partial class Tests {
/// <summary>
/// alias keyword binds lexically while alias_method binds to self.class.
/// </summary>
public void Scenario_MethodAliases1() {
AssertOutput(delegate() {
CompilerTest(@"
module M
def y
puts 'M::y'
end
def do_alias
alias aliased_y y
end
def do_alias_method
self.class.send :alias_method, :method_aliased_y, :y
end
end
class C
include M
def y
puts 'C::y'
end
end
c = C.new
c.do_alias
c.do_alias_method
c.aliased_y
c.method_aliased_y
");
}, @"
M::y
C::y
");
}
public void Scenario_MethodAliases2() {
TestOutput(@"
class C
private
def foo; end
public
alias bar foo
p private_instance_methods(false).sort
p public_instance_methods(false).sort
public :bar
p private_instance_methods(false).sort
p public_instance_methods(false).sort
end
", @"
[:bar, :foo]
[]
[:foo]
[:bar]
");
}
/// <summary>
/// Alias (unlike undef) looks up the method in Object.
/// </summary>
public void AliasMethodLookup1() {
AssertOutput(delegate() {
CompilerTest(@"
module Kernel; def m_kernel; end; end
class Object; def m_object; end; end
module N
def m_n
end
module M
alias x m_object rescue puts '!alias m_object'
alias x m_kernel rescue puts '!alias m_kernel'
alias x m_n rescue puts '!alias m_n'
end
end
");
}, @"
!alias m_n
");
}
#if OBSOLETE
/// <summary>
/// Alias in define_method.
/// </summary>
[Options(Compatibility = RubyCompatibility.Ruby186)]
public void AliasMethodLookup2() {
TestOutput(@"
class D
end
class E
D.send(:define_method, :bar) {
alias g f rescue p $!
}
end
d = D.new
d.bar
", @"
<NameError: undefined method `f' for class `D'>
");
}
#endif
/// <summary>
/// Alias in define_method.
/// </summary>
public void AliasMethodLookup3() {
TestOutput(@"
class D
end
class E
D.send(:define_method, :bar) {
alias g f rescue p $!
}
end
d = D.new
d.bar
", @"
#<NameError: undefined method `f' for class `E'>
");
}
/// <summary>
/// "alias" uses the same lookup algorithm as method definition (see RubyScope.GetMethodDefinitionOwner).
/// </summary>
public void AliasInModuleEval1() {
AssertOutput(delegate() {
CompilerTest(@"
class D
def foo
puts 'D::foo'
end
end
class C
def foo
puts 'C::foo'
end
D.module_eval {
alias bar foo
}
end
D.new.bar
");
}, @"
D::foo
");
}
public void MethodAliasInModuleEval1() {
AssertOutput(delegate() {
CompilerTest(@"
class D
def foo
puts 'D::foo'
end
end
class E
def foo
puts 'E::foo'
end
end
class C
def foo
puts 'C::foo'
end
D.module_eval {
E.send :alias_method, :bar, :foo
}
end
E.new.bar
");
}, @"
E::foo
");
}
public void MethodLookup1() {
AssertOutput(delegate() {
CompilerTest(@"
module Kernel
def k__; end
end
class Module
def m__; end;
end
module MyModule
end
puts x = ((MyModule.send(:alias_method, :x, :k__); true) rescue false)
puts x = ((MyModule.send(:alias_method, :x, :m__); true) rescue false)
puts x = ((MyModule.send(:public, :k__); true) rescue false)
puts x = ((MyModule.send(:public, :m__); true) rescue false)
puts x = ((MyModule.send(:method, :k__); true) rescue false)
puts x = ((MyModule.send(:method, :m__); true) rescue false)
puts x = ((MyModule.send(:undef_method, :k__); true) rescue false)
puts x = ((MyModule.send(:undef_method, :m__); true) rescue false)
");
}, @"
true
false
true
false
true
true
false
false
");
}
public void MethodAliasExpression() {
AssertOutput(delegate() {
CompilerTest(@"
def b; end
p ((alias a b))
", 1, 0);
}, "nil");
}
public void AliasUndefWithQuotedSymbols() {
TestOutput(@"
class A
def ab
end
def c
end
alias :'d' :'c'
p instance_methods(false).sort
undef :""a#{'b'}"", :'c'
p instance_methods(false).sort
end
", @"
[:ab, :c, :d]
[:d]
");
}
}
}