* lib/optparse.rb (OptionParser#order, #permute, #parse): allow an

  array as argument.

* test/ruby/test_*.rb: moved invariants to left side in
  assert_equal, and use assert_nil, assert_raises and so on.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4516 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 340 insertions, 340 deletions

diff --git a/test/ruby/test_assignment.rb b/test/ruby/test_assignment.rb
index 9a3e3a1636..51d1c780f8 100644
--- a/test/ruby/test_assignment.rb
+++ b/test/ruby/test_assignment.rb
@@ -5,275 +5,275 @@ $KCODE = 'none'
 class TestAssignment < Test::Unit::TestCase
   def test_assign
     a=[]; a[0] ||= "bar";
-    assert_equal(a[0], "bar")
+    assert_equal("bar", a[0])
     h={}; h["foo"] ||= "bar";
-    assert_equal(h["foo"], "bar")
-    
+    assert_equal("bar", h["foo"])
+
     aa = 5
     aa ||= 25
-    assert_equal(aa, 5)
+    assert_equal(5, aa)
     bb ||= 25
-    assert_equal(bb, 25)
+    assert_equal(25, bb)
     cc &&=33
-    assert_equal(cc, nil)
+    assert_nil(cc)
     cc = 5
     cc &&=44
-    assert_equal(cc, 44)
-    
-    a = nil; assert_equal(a, nil)
-    a = 1; assert_equal(a, 1)
-    a = []; assert_equal(a, [])
-    a = [1]; assert_equal(a, [1])
-    a = [nil]; assert_equal(a, [nil])
-    a = [[]]; assert_equal(a, [[]])
-    a = [1,2]; assert_equal(a, [1,2])
-    a = [*[]]; assert_equal(a, [])
-    a = [*[1]]; assert_equal(a, [1])
-    a = [*[1,2]]; assert_equal(a, [1,2])
-    
-    a = *nil; assert_equal(a, nil)
-    a = *1; assert_equal(a, 1)
-    a = *[]; assert_equal(a, nil)
-    a = *[1]; assert_equal(a, 1)
-    a = *[nil]; assert_equal(a, nil)
-    a = *[[]]; assert_equal(a, [])
-    a = *[1,2]; assert_equal(a, [1,2])
-    a = *[*[]]; assert_equal(a, nil)
-    a = *[*[1]]; assert_equal(a, 1)
-    a = *[*[1,2]]; assert_equal(a, [1,2])
-    
-    *a = nil; assert_equal(a, [nil])
-    *a = 1; assert_equal(a, [1])
-    *a = []; assert_equal(a, [[]])
-    *a = [1]; assert_equal(a, [[1]])
-    *a = [nil]; assert_equal(a, [[nil]])
-    *a = [[]]; assert_equal(a, [[[]]])
-    *a = [1,2]; assert_equal(a, [[1,2]])
-    *a = [*[]]; assert_equal(a, [[]])
-    *a = [*[1]]; assert_equal(a, [[1]])
-    *a = [*[1,2]]; assert_equal(a, [[1,2]])
-    
-    *a = *nil; assert_equal(a, [nil])
-    *a = *1; assert_equal(a, [1])
-    *a = *[]; assert_equal(a, [])
-    *a = *[1]; assert_equal(a, [1])
-    *a = *[nil]; assert_equal(a, [nil])
-    *a = *[[]]; assert_equal(a, [[]])
-    *a = *[1,2]; assert_equal(a, [1,2])
-    *a = *[*[]]; assert_equal(a, [])
-    *a = *[*[1]]; assert_equal(a, [1])
-    *a = *[*[1,2]]; assert_equal(a, [1,2])
-    
-    a,b,*c = nil; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = 1; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = []; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = [1]; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = [nil]; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = [[]]; assert_equal([a,b,c], [[],nil,[]])
-    a,b,*c = [1,2]; assert_equal([a,b,c], [1,2,[]])
-    a,b,*c = [*[]]; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = [*[1]]; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = [*[1,2]]; assert_equal([a,b,c], [1,2,[]])
-    
-    a,b,*c = *nil; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = *1; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = *[]; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = *[1]; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = *[nil]; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = *[[]]; assert_equal([a,b,c], [[],nil,[]])
-    a,b,*c = *[1,2]; assert_equal([a,b,c], [1,2,[]])
-    a,b,*c = *[*[]]; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = *[*[1]]; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = *[*[1,2]]; assert_equal([a,b,c], [1,2,[]])
+    assert_equal(44, cc)
+
+    a = nil; assert_nil(a)
+    a = 1; assert_equal(1, a)
+    a = []; assert_equal([], a)
+    a = [1]; assert_equal([1], a)
+    a = [nil]; assert_equal([nil], a)
+    a = [[]]; assert_equal([[]], a)
+    a = [1,2]; assert_equal([1,2], a)
+    a = [*[]]; assert_equal([], a)
+    a = [*[1]]; assert_equal([1], a)
+    a = [*[1,2]]; assert_equal([1,2], a)
+
+    a = *nil; assert_nil(a)
+    a = *1; assert_equal(1, a)
+    a = *[]; assert_nil(a)
+    a = *[1]; assert_equal(1, a)
+    a = *[nil]; assert_nil(a)
+    a = *[[]]; assert_equal([], a)
+    a = *[1,2]; assert_equal([1,2], a)
+    a = *[*[]]; assert_nil(a)
+    a = *[*[1]]; assert_equal(1, a)
+    a = *[*[1,2]]; assert_equal([1,2], a)
+
+    *a = nil; assert_equal([nil], a)
+    *a = 1; assert_equal([1], a)
+    *a = []; assert_equal([[]], a)
+    *a = [1]; assert_equal([[1]], a)
+    *a = [nil]; assert_equal([[nil]], a)
+    *a = [[]]; assert_equal([[[]]], a)
+    *a = [1,2]; assert_equal([[1,2]], a)
+    *a = [*[]]; assert_equal([[]], a)
+    *a = [*[1]]; assert_equal([[1]], a)
+    *a = [*[1,2]]; assert_equal([[1,2]], a)
+
+    *a = *nil; assert_equal([nil], a)
+    *a = *1; assert_equal([1], a)
+    *a = *[]; assert_equal([], a)
+    *a = *[1]; assert_equal([1], a)
+    *a = *[nil]; assert_equal([nil], a)
+    *a = *[[]]; assert_equal([[]], a)
+    *a = *[1,2]; assert_equal([1,2], a)
+    *a = *[*[]]; assert_equal([], a)
+    *a = *[*[1]]; assert_equal([1], a)
+    *a = *[*[1,2]]; assert_equal([1,2], a)
+
+    a,b,*c = nil; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = 1; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = []; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = [1]; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = [nil]; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = [[]]; assert_equal([[],nil,[]], [a,b,c])
+    a,b,*c = [1,2]; assert_equal([1,2,[]], [a,b,c])
+    a,b,*c = [*[]]; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = [*[1]]; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = [*[1,2]]; assert_equal([1,2,[]], [a,b,c])
+
+    a,b,*c = *nil; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = *1; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = *[]; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = *[1]; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = *[nil]; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = *[[]]; assert_equal([[],nil,[]], [a,b,c])
+    a,b,*c = *[1,2]; assert_equal([1,2,[]], [a,b,c])
+    a,b,*c = *[*[]]; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = *[*[1]]; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = *[*[1,2]]; assert_equal([1,2,[]], [a,b,c])
   end
 
   def test_yield
-    def f; yield nil; end; f {|a| assert_equal(a, nil)}
-    def f; yield 1; end; f {|a| assert_equal(a, 1)}
-    def f; yield []; end; f {|a| assert_equal(a, [])}
-    def f; yield [1]; end; f {|a| assert_equal(a, [1])}
-    def f; yield [nil]; end; f {|a| assert_equal(a, [nil])}
-    def f; yield [[]]; end; f {|a| assert_equal(a, [[]])}
-    def f; yield [*[]]; end; f {|a| assert_equal(a, [])}
-    def f; yield [*[1]]; end; f {|a| assert_equal(a, [1])}
-    def f; yield [*[1,2]]; end; f {|a| assert_equal(a, [1,2])}
-    
-    def f; yield *nil; end; f {|a| assert_equal(a, nil)}
-    def f; yield *1; end; f {|a| assert_equal(a, 1)}
-    def f; yield *[1]; end; f {|a| assert_equal(a, 1)}
-    def f; yield *[nil]; end; f {|a| assert_equal(a, nil)}
-    def f; yield *[[]]; end; f {|a| assert_equal(a, [])}
-    def f; yield *[*[1]]; end; f {|a| assert_equal(a, 1)}
-    
-    def f; yield; end; f {|*a| assert_equal(a, [])}
-    def f; yield nil; end; f {|*a| assert_equal(a, [nil])}
-    def f; yield 1; end; f {|*a| assert_equal(a, [1])}
-    def f; yield []; end; f {|*a| assert_equal(a, [[]])}
-    def f; yield [1]; end; f {|*a| assert_equal(a, [[1]])}
-    def f; yield [nil]; end; f {|*a| assert_equal(a, [[nil]])}
-    def f; yield [[]]; end; f {|*a| assert_equal(a, [[[]]])}
-    def f; yield [1,2]; end; f {|*a| assert_equal(a, [[1,2]])}
-    def f; yield [*[]]; end; f {|*a| assert_equal(a, [[]])}
-    def f; yield [*[1]]; end; f {|*a| assert_equal(a, [[1]])}
-    def f; yield [*[1,2]]; end; f {|*a| assert_equal(a, [[1,2]])}
-    
-    def f; yield *nil; end; f {|*a| assert_equal(a, [nil])}
-    def f; yield *1; end; f {|*a| assert_equal(a, [1])}
-    def f; yield *[]; end; f {|*a| assert_equal(a, [])}
-    def f; yield *[1]; end; f {|*a| assert_equal(a, [1])}
-    def f; yield *[nil]; end; f {|*a| assert_equal(a, [nil])}
-    def f; yield *[[]]; end; f {|*a| assert_equal(a, [[]])}
-    def f; yield *[*[]]; end; f {|*a| assert_equal(a, [])}
-    def f; yield *[*[1]]; end; f {|*a| assert_equal(a, [1])}
-    def f; yield *[*[1,2]]; end; f {|*a| assert_equal(a, [1,2])}
-    
-    def f; yield; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield nil; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield 1; end; f {|a,b,*c| assert_equal([a,b,c], [1,nil,[]])}
-    def f; yield []; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield [1]; end; f {|a,b,*c| assert_equal([a,b,c], [1,nil,[]])}
-    def f; yield [nil]; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield [[]]; end; f {|a,b,*c| assert_equal([a,b,c], [[],nil,[]])}
-    def f; yield [*[]]; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield [*[1]]; end; f {|a,b,*c| assert_equal([a,b,c], [1,nil,[]])}
-    def f; yield [*[1,2]]; end; f {|a,b,*c| assert_equal([a,b,c], [1,2,[]])}
-    
-    def f; yield *nil; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield *1; end; f {|a,b,*c| assert_equal([a,b,c], [1,nil,[]])}
-    def f; yield *[]; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield *[1]; end; f {|a,b,*c| assert_equal([a,b,c], [1,nil,[]])}
-    def f; yield *[nil]; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield *[[]]; end; f {|a,b,*c| assert_equal([a,b,c], [[],nil,[]])}
-    def f; yield *[*[]]; end; f {|a,b,*c| assert_equal([a,b,c], [nil,nil,[]])}
-    def f; yield *[*[1]]; end; f {|a,b,*c| assert_equal([a,b,c], [1,nil,[]])}
-    def f; yield *[*[1,2]]; end; f {|a,b,*c| assert_equal([a,b,c], [1,2,[]])}
+    def f; yield nil; end; f {|a| assert_nil(a)}
+    def f; yield 1; end; f {|a| assert_equal(1, a)}
+    def f; yield []; end; f {|a| assert_equal([], a)}
+    def f; yield [1]; end; f {|a| assert_equal([1], a)}
+    def f; yield [nil]; end; f {|a| assert_equal([nil], a)}
+    def f; yield [[]]; end; f {|a| assert_equal([[]], a)}
+    def f; yield [*[]]; end; f {|a| assert_equal([], a)}
+    def f; yield [*[1]]; end; f {|a| assert_equal([1], a)}
+    def f; yield [*[1,2]]; end; f {|a| assert_equal([1,2], a)}
+
+    def f; yield *nil; end; f {|a| assert_nil(a)}
+    def f; yield *1; end; f {|a| assert_equal(1, a)}
+    def f; yield *[1]; end; f {|a| assert_equal(1, a)}
+    def f; yield *[nil]; end; f {|a| assert_nil(a)}
+    def f; yield *[[]]; end; f {|a| assert_equal([], a)}
+    def f; yield *[*[1]]; end; f {|a| assert_equal(1, a)}
+
+    def f; yield; end; f {|*a| assert_equal([], a)}
+    def f; yield nil; end; f {|*a| assert_equal([nil], a)}
+    def f; yield 1; end; f {|*a| assert_equal([1], a)}
+    def f; yield []; end; f {|*a| assert_equal([[]], a)}
+    def f; yield [1]; end; f {|*a| assert_equal([[1]], a)}
+    def f; yield [nil]; end; f {|*a| assert_equal([[nil]], a)}
+    def f; yield [[]]; end; f {|*a| assert_equal([[[]]], a)}
+    def f; yield [1,2]; end; f {|*a| assert_equal([[1,2]], a)}
+    def f; yield [*[]]; end; f {|*a| assert_equal([[]], a)}
+    def f; yield [*[1]]; end; f {|*a| assert_equal([[1]], a)}
+    def f; yield [*[1,2]]; end; f {|*a| assert_equal([[1,2]], a)}
+
+    def f; yield *nil; end; f {|*a| assert_equal([nil], a)}
+    def f; yield *1; end; f {|*a| assert_equal([1], a)}
+    def f; yield *[]; end; f {|*a| assert_equal([], a)}
+    def f; yield *[1]; end; f {|*a| assert_equal([1], a)}
+    def f; yield *[nil]; end; f {|*a| assert_equal([nil], a)}
+    def f; yield *[[]]; end; f {|*a| assert_equal([[]], a)}
+    def f; yield *[*[]]; end; f {|*a| assert_equal([], a)}
+    def f; yield *[*[1]]; end; f {|*a| assert_equal([1], a)}
+    def f; yield *[*[1,2]]; end; f {|*a| assert_equal([1,2], a)}
+
+    def f; yield; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield nil; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield 1; end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}
+    def f; yield []; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield [1]; end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}
+    def f; yield [nil]; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield [[]]; end; f {|a,b,*c| assert_equal([[],nil,[]], [a,b,c])}
+    def f; yield [*[]]; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield [*[1]]; end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}
+    def f; yield [*[1,2]]; end; f {|a,b,*c| assert_equal([1,2,[]], [a,b,c])}
+
+    def f; yield *nil; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield *1; end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}
+    def f; yield *[]; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield *[1]; end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}
+    def f; yield *[nil]; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield *[[]]; end; f {|a,b,*c| assert_equal([[],nil,[]], [a,b,c])}
+    def f; yield *[*[]]; end; f {|a,b,*c| assert_equal([nil,nil,[]], [a,b,c])}
+    def f; yield *[*[1]]; end; f {|a,b,*c| assert_equal([1,nil,[]], [a,b,c])}
+    def f; yield *[*[1,2]]; end; f {|a,b,*c| assert_equal([1,2,[]], [a,b,c])}
   end
 
   def test_return
-    def r; return; end; a = r(); assert_equal(a, nil)
-    def r; return nil; end; a = r(); assert_equal(a, nil)
-    def r; return 1; end; a = r(); assert_equal(a, 1)
-    def r; return []; end; a = r(); assert_equal(a, [])
-    def r; return [1]; end; a = r(); assert_equal(a, [1])
-    def r; return [nil]; end; a = r(); assert_equal(a, [nil])
-    def r; return [[]]; end; a = r(); assert_equal(a, [[]])
-    def r; return [*[]]; end; a = r(); assert_equal(a, [])
-    def r; return [*[1]]; end; a = r(); assert_equal(a, [1])
-    def r; return [*[1,2]]; end; a = r(); assert_equal(a, [1,2])
-    
-    def r; return *nil; end; a = r(); assert_equal(a, nil)
-    def r; return *1; end; a = r(); assert_equal(a, 1)
-    def r; return *[]; end; a = r(); assert_equal(a, nil)
-    def r; return *[1]; end; a = r(); assert_equal(a, 1)
-    def r; return *[nil]; end; a = r(); assert_equal(a, nil)
-    def r; return *[[]]; end; a = r(); assert_equal(a, [])
-    def r; return *[*[]]; end; a = r(); assert_equal(a, nil)
-    def r; return *[*[1]]; end; a = r(); assert_equal(a, 1)
-    def r; return *[*[1,2]]; end; a = r(); assert_equal(a, [1,2])
-    
-    def r; return *nil; end; a = *r(); assert_equal(a, nil)
-    def r; return *1; end; a = *r(); assert_equal(a, 1)
-    def r; return *[]; end; a = *r(); assert_equal(a, nil)
-    def r; return *[1]; end; a = *r(); assert_equal(a, 1)
-    def r; return *[nil]; end; a = *r(); assert_equal(a, nil)
-    def r; return *[[]]; end; a = *r(); assert_equal(a, nil)
-    def r; return *[*[]]; end; a = *r(); assert_equal(a, nil)
-    def r; return *[*[1]]; end; a = *r(); assert_equal(a, 1)
-    def r; return *[*[1,2]]; end; a = *r(); assert_equal(a, [1,2])
-    
-    def r; return; end; *a = r(); assert_equal(a, [nil])
-    def r; return nil; end; *a = r(); assert_equal(a, [nil])
-    def r; return 1; end; *a = r(); assert_equal(a, [1])
-    def r; return []; end; *a = r(); assert_equal(a, [[]])
-    def r; return [1]; end; *a = r(); assert_equal(a, [[1]])
-    def r; return [nil]; end; *a = r(); assert_equal(a, [[nil]])
-    def r; return [[]]; end; *a = r(); assert_equal(a, [[[]]])
-    def r; return [1,2]; end; *a = r(); assert_equal(a, [[1,2]])
-    def r; return [*[]]; end; *a = r(); assert_equal(a, [[]])
-    def r; return [*[1]]; end; *a = r(); assert_equal(a, [[1]])
-    def r; return [*[1,2]]; end; *a = r(); assert_equal(a, [[1,2]])
-    
-    def r; return *nil; end; *a = r(); assert_equal(a, [nil])
-    def r; return *1; end; *a = r(); assert_equal(a, [1])
-    def r; return *[]; end; *a = r(); assert_equal(a, [nil])
-    def r; return *[1]; end; *a = r(); assert_equal(a, [1])
-    def r; return *[nil]; end; *a = r(); assert_equal(a, [nil])
-    def r; return *[[]]; end; *a = r(); assert_equal(a, [[]])
-    def r; return *[1,2]; end; *a = r(); assert_equal(a, [[1,2]])
-    def r; return *[*[]]; end; *a = r(); assert_equal(a, [nil])
-    def r; return *[*[1]]; end; *a = r(); assert_equal(a, [1])
-    def r; return *[*[1,2]]; end; *a = r(); assert_equal(a, [[1,2]])
-    
-    def r; return *nil; end; *a = *r(); assert_equal(a, [nil])
-    def r; return *1; end; *a = *r(); assert_equal(a, [1])
-    def r; return *[]; end; *a = *r(); assert_equal(a, [nil])
-    def r; return *[1]; end; *a = *r(); assert_equal(a, [1])
-    def r; return *[nil]; end; *a = *r(); assert_equal(a, [nil])
-    def r; return *[[]]; end; *a = *r(); assert_equal(a, [])
-    def r; return *[1,2]; end; *a = *r(); assert_equal(a, [1,2])
-    def r; return *[*[]]; end; *a = *r(); assert_equal(a, [nil])
-    def r; return *[*[1]]; end; *a = *r(); assert_equal(a, [1])
-    def r; return *[*[1,2]]; end; *a = *r(); assert_equal(a, [1,2])
-    
-    def r; return; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return nil; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return 1; end; a,b,*c = r(); assert_equal([a,b,c], [1,nil,[]])
-    def r; return []; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return [1]; end; a,b,*c = r(); assert_equal([a,b,c], [1,nil,[]])
-    def r; return [nil]; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return [[]]; end; a,b,*c = r(); assert_equal([a,b,c], [[],nil,[]])
-    def r; return [1,2]; end; a,b,*c = r(); assert_equal([a,b,c], [1,2,[]])
-    def r; return [*[]]; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return [*[1]]; end; a,b,*c = r(); assert_equal([a,b,c], [1,nil,[]])
-    def r; return [*[1,2]]; end; a,b,*c = r(); assert_equal([a,b,c], [1,2,[]])
-    
-    def r; return *nil; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return *1; end; a,b,*c = r(); assert_equal([a,b,c], [1,nil,[]])
-    def r; return *[]; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return *[1]; end; a,b,*c = r(); assert_equal([a,b,c], [1,nil,[]])
-    def r; return *[nil]; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return *[[]]; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return *[1,2]; end; a,b,*c = r(); assert_equal([a,b,c], [1,2,[]])
-    def r; return *[*[]]; end; a,b,*c = r(); assert_equal([a,b,c], [nil,nil,[]])
-    def r; return *[*[1]]; end; a,b,*c = r(); assert_equal([a,b,c], [1,nil,[]])
-    def r; return *[*[1,2]]; end; a,b,*c = r(); assert_equal([a,b,c], [1,2,[]])
+    def r; return; end; a = r(); assert_nil(a)
+    def r; return nil; end; a = r(); assert_nil(a)
+    def r; return 1; end; a = r(); assert_equal(1, a)
+    def r; return []; end; a = r(); assert_equal([], a)
+    def r; return [1]; end; a = r(); assert_equal([1], a)
+    def r; return [nil]; end; a = r(); assert_equal([nil], a)
+    def r; return [[]]; end; a = r(); assert_equal([[]], a)
+    def r; return [*[]]; end; a = r(); assert_equal([], a)
+    def r; return [*[1]]; end; a = r(); assert_equal([1], a)
+    def r; return [*[1,2]]; end; a = r(); assert_equal([1,2], a)
+
+    def r; return *nil; end; a = r(); assert_nil(a)
+    def r; return *1; end; a = r(); assert_equal(1, a)
+    def r; return *[]; end; a = r(); assert_nil(a)
+    def r; return *[1]; end; a = r(); assert_equal(1, a)
+    def r; return *[nil]; end; a = r(); assert_nil(a)
+    def r; return *[[]]; end; a = r(); assert_equal([], a)
+    def r; return *[*[]]; end; a = r(); assert_nil(a)
+    def r; return *[*[1]]; end; a = r(); assert_equal(1, a)
+    def r; return *[*[1,2]]; end; a = r(); assert_equal([1,2], a)
+
+    def r; return *nil; end; a = *r(); assert_nil(a)
+    def r; return *1; end; a = *r(); assert_equal(1, a)
+    def r; return *[]; end; a = *r(); assert_nil(a)
+    def r; return *[1]; end; a = *r(); assert_equal(1, a)
+    def r; return *[nil]; end; a = *r(); assert_nil(a)
+    def r; return *[[]]; end; a = *r(); assert_nil(a)
+    def r; return *[*[]]; end; a = *r(); assert_nil(a)
+    def r; return *[*[1]]; end; a = *r(); assert_equal(1, a)
+    def r; return *[*[1,2]]; end; a = *r(); assert_equal([1,2], a)
+
+    def r; return; end; *a = r(); assert_equal([nil], a)
+    def r; return nil; end; *a = r(); assert_equal([nil], a)
+    def r; return 1; end; *a = r(); assert_equal([1], a)
+    def r; return []; end; *a = r(); assert_equal([[]], a)
+    def r; return [1]; end; *a = r(); assert_equal([[1]], a)
+    def r; return [nil]; end; *a = r(); assert_equal([[nil]], a)
+    def r; return [[]]; end; *a = r(); assert_equal([[[]]], a)
+    def r; return [1,2]; end; *a = r(); assert_equal([[1,2]], a)
+    def r; return [*[]]; end; *a = r(); assert_equal([[]], a)
+    def r; return [*[1]]; end; *a = r(); assert_equal([[1]], a)
+    def r; return [*[1,2]]; end; *a = r(); assert_equal([[1,2]], a)
+
+    def r; return *nil; end; *a = r(); assert_equal([nil], a)
+    def r; return *1; end; *a = r(); assert_equal([1], a)
+    def r; return *[]; end; *a = r(); assert_equal([nil], a)
+    def r; return *[1]; end; *a = r(); assert_equal([1], a)
+    def r; return *[nil]; end; *a = r(); assert_equal([nil], a)
+    def r; return *[[]]; end; *a = r(); assert_equal([[]], a)
+    def r; return *[1,2]; end; *a = r(); assert_equal([[1,2]], a)
+    def r; return *[*[]]; end; *a = r(); assert_equal([nil], a)
+    def r; return *[*[1]]; end; *a = r(); assert_equal([1], a)
+    def r; return *[*[1,2]]; end; *a = r(); assert_equal([[1,2]], a)
+
+    def r; return *nil; end; *a = *r(); assert_equal([nil], a)
+    def r; return *1; end; *a = *r(); assert_equal([1], a)
+    def r; return *[]; end; *a = *r(); assert_equal([nil], a)
+    def r; return *[1]; end; *a = *r(); assert_equal([1], a)
+    def r; return *[nil]; end; *a = *r(); assert_equal([nil], a)
+    def r; return *[[]]; end; *a = *r(); assert_equal([], a)
+    def r; return *[1,2]; end; *a = *r(); assert_equal([1,2], a)
+    def r; return *[*[]]; end; *a = *r(); assert_equal([nil], a)
+    def r; return *[*[1]]; end; *a = *r(); assert_equal([1], a)
+    def r; return *[*[1,2]]; end; *a = *r(); assert_equal([1,2], a)
+
+    def r; return; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return nil; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return 1; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c])
+    def r; return []; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return [1]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c])
+    def r; return [nil]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return [[]]; end; a,b,*c = r(); assert_equal([[],nil,[]], [a,b,c])
+    def r; return [1,2]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c])
+    def r; return [*[]]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return [*[1]]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c])
+    def r; return [*[1,2]]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c])
+
+    def r; return *nil; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return *1; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c])
+    def r; return *[]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return *[1]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c])
+    def r; return *[nil]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return *[[]]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return *[1,2]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c])
+    def r; return *[*[]]; end; a,b,*c = r(); assert_equal([nil,nil,[]], [a,b,c])
+    def r; return *[*[1]]; end; a,b,*c = r(); assert_equal([1,nil,[]], [a,b,c])
+    def r; return *[*[1,2]]; end; a,b,*c = r(); assert_equal([1,2,[]], [a,b,c])
   end
 
   def test_lambda
     f = lambda {|r,| assert_equal([], r)}
     f.call([], *[])
-    
+
     f = lambda {|r,*l| assert_equal([], r); assert_equal([1], l)}
     f.call([], *[1])
-    
+
     f = lambda{|x| x}
-    assert_equal(f.call(42), 42)
-    assert_equal(f.call([42]), [42])
-    assert_equal(f.call([[42]]), [[42]])
-    assert_equal(f.call([42,55]), [42,55])
-    
+    assert_equal(42, f.call(42))
+    assert_equal([42], f.call([42]))
+    assert_equal([[42]], f.call([[42]]))
+    assert_equal([42,55], f.call([42,55]))
+
     f = lambda{|x,| x}
-    assert_equal(f.call(42), 42)
-    assert_equal(f.call([42]), [42])
-    assert_equal(f.call([[42]]), [[42]])
-    assert_equal(f.call([42,55]), [42,55])
-    
+    assert_equal(42, f.call(42))
+    assert_equal([42], f.call([42]))
+    assert_equal([[42]], f.call([[42]]))
+    assert_equal([42,55], f.call([42,55]))
+
     f = lambda{|*x| x}
-    assert_equal(f.call(42), [42])
-    assert_equal(f.call([42]), [[42]])
-    assert_equal(f.call([[42]]), [[[42]]])
-    assert_equal(f.call([42,55]), [[42,55]])
-    assert_equal(f.call(42,55), [42,55])
+    assert_equal([42], f.call(42))
+    assert_equal([[42]], f.call([42]))
+    assert_equal([[[42]]], f.call([[42]]))
+    assert_equal([[42,55]], f.call([42,55]))
+    assert_equal([42,55], f.call(42,55))
   end
 
   def test_multi
     a,=*[1]
-    assert_equal(a, 1)
+    assert_equal(1, a)
     a,=*[[1]]
-    assert_equal(a, [1])
+    assert_equal([1], a)
     a,=*[[[1]]]
-    assert_equal(a, [[1]])
-    
+    assert_equal([[1]], a)
+
     x, (y, z) = 1, 2, 3
     assert_equal([1,2,nil], [x,y,z])
     x, (y, z) = 1, [2,3]
@@ -283,87 +283,87 @@ class TestAssignment < Test::Unit::TestCase
   end
 
   def test_break
-    a = loop do break; end; assert_equal(a, nil)
-    a = loop do break nil; end; assert_equal(a, nil)
-    a = loop do break 1; end; assert_equal(a, 1)
-    a = loop do break []; end; assert_equal(a, [])
-    a = loop do break [1]; end; assert_equal(a, [1])
-    a = loop do break [nil]; end; assert_equal(a, [nil])
-    a = loop do break [[]]; end; assert_equal(a, [[]])
-    a = loop do break [*[]]; end; assert_equal(a, [])
-    a = loop do break [*[1]]; end; assert_equal(a, [1])
-    a = loop do break [*[1,2]]; end; assert_equal(a, [1,2])
-    
-    a = loop do break *nil; end; assert_equal(a, nil)
-    a = loop do break *1; end; assert_equal(a, 1)
-    a = loop do break *[]; end; assert_equal(a, nil)
-    a = loop do break *[1]; end; assert_equal(a, 1)
-    a = loop do break *[nil]; end; assert_equal(a, nil)
-    a = loop do break *[[]]; end; assert_equal(a, [])
-    a = loop do break *[*[]]; end; assert_equal(a, nil)
-    a = loop do break *[*[1]]; end; assert_equal(a, 1)
-    a = loop do break *[*[1,2]]; end; assert_equal(a, [1,2])
-    
-    *a = loop do break; end; assert_equal(a, [nil])
-    *a = loop do break nil; end; assert_equal(a, [nil])
-    *a = loop do break 1; end; assert_equal(a, [1])
-    *a = loop do break []; end; assert_equal(a, [[]])
-    *a = loop do break [1]; end; assert_equal(a, [[1]])
-    *a = loop do break [nil]; end; assert_equal(a, [[nil]])
-    *a = loop do break [[]]; end; assert_equal(a, [[[]]])
-    *a = loop do break [1,2]; end; assert_equal(a, [[1,2]])
-    *a = loop do break [*[]]; end; assert_equal(a, [[]])
-    *a = loop do break [*[1]]; end; assert_equal(a, [[1]])
-    *a = loop do break [*[1,2]]; end; assert_equal(a, [[1,2]])
-    
-    *a = loop do break *nil; end; assert_equal(a, [nil])
-    *a = loop do break *1; end; assert_equal(a, [1])
-    *a = loop do break *[]; end; assert_equal(a, [nil])
-    *a = loop do break *[1]; end; assert_equal(a, [1])
-    *a = loop do break *[nil]; end; assert_equal(a, [nil])
-    *a = loop do break *[[]]; end; assert_equal(a, [[]])
-    *a = loop do break *[1,2]; end; assert_equal(a, [[1,2]])
-    *a = loop do break *[*[]]; end; assert_equal(a, [nil])
-    *a = loop do break *[*[1]]; end; assert_equal(a, [1])
-    *a = loop do break *[*[1,2]]; end; assert_equal(a, [[1,2]])
-    
-    *a = *loop do break *nil; end; assert_equal(a, [nil])
-    *a = *loop do break *1; end; assert_equal(a, [1])
-    *a = *loop do break *[]; end; assert_equal(a, [nil])
-    *a = *loop do break *[1]; end; assert_equal(a, [1])
-    *a = *loop do break *[nil]; end; assert_equal(a, [nil])
-    *a = *loop do break *[[]]; end; assert_equal(a, [])
-    *a = *loop do break *[1,2]; end; assert_equal(a, [1,2])
-    *a = *loop do break *[*[]]; end; assert_equal(a, [nil])
-    *a = *loop do break *[*[1]]; end; assert_equal(a, [1])
-    *a = *loop do break *[*[1,2]]; end; assert_equal(a, [1,2])
-    
-    a,b,*c = loop do break; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break nil; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break 1; end; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = loop do break []; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break [1]; end; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = loop do break [nil]; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break [[]]; end; assert_equal([a,b,c], [[],nil,[]])
-    a,b,*c = loop do break [1,2]; end; assert_equal([a,b,c], [1,2,[]])
-    a,b,*c = loop do break [*[]]; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break [*[1]]; end; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = loop do break [*[1,2]]; end; assert_equal([a,b,c], [1,2,[]])
-    
-    a,b,*c = loop do break *nil; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break *1; end; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = loop do break *[]; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break *[1]; end; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = loop do break *[nil]; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break *[[]]; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break *[1,2]; end; assert_equal([a,b,c], [1,2,[]])
-    a,b,*c = loop do break *[*[]]; end; assert_equal([a,b,c], [nil,nil,[]])
-    a,b,*c = loop do break *[*[1]]; end; assert_equal([a,b,c], [1,nil,[]])
-    a,b,*c = loop do break *[*[1,2]]; end; assert_equal([a,b,c], [1,2,[]])
+    a = loop do break; end; assert_nil(a)
+    a = loop do break nil; end; assert_nil(a)
+    a = loop do break 1; end; assert_equal(1, a)
+    a = loop do break []; end; assert_equal([], a)
+    a = loop do break [1]; end; assert_equal([1], a)
+    a = loop do break [nil]; end; assert_equal([nil], a)
+    a = loop do break [[]]; end; assert_equal([[]], a)
+    a = loop do break [*[]]; end; assert_equal([], a)
+    a = loop do break [*[1]]; end; assert_equal([1], a)
+    a = loop do break [*[1,2]]; end; assert_equal([1,2], a)
+
+    a = loop do break *nil; end; assert_nil(a)
+    a = loop do break *1; end; assert_equal(1, a)
+    a = loop do break *[]; end; assert_nil(a)
+    a = loop do break *[1]; end; assert_equal(1, a)
+    a = loop do break *[nil]; end; assert_nil(a)
+    a = loop do break *[[]]; end; assert_equal([], a)
+    a = loop do break *[*[]]; end; assert_nil(a)
+    a = loop do break *[*[1]]; end; assert_equal(1, a)
+    a = loop do break *[*[1,2]]; end; assert_equal([1,2], a)
+
+    *a = loop do break; end; assert_equal([nil], a)
+    *a = loop do break nil; end; assert_equal([nil], a)
+    *a = loop do break 1; end; assert_equal([1], a)
+    *a = loop do break []; end; assert_equal([[]], a)
+    *a = loop do break [1]; end; assert_equal([[1]], a)
+    *a = loop do break [nil]; end; assert_equal([[nil]], a)
+    *a = loop do break [[]]; end; assert_equal([[[]]], a)
+    *a = loop do break [1,2]; end; assert_equal([[1,2]], a)
+    *a = loop do break [*[]]; end; assert_equal([[]], a)
+    *a = loop do break [*[1]]; end; assert_equal([[1]], a)
+    *a = loop do break [*[1,2]]; end; assert_equal([[1,2]], a)
+
+    *a = loop do break *nil; end; assert_equal([nil], a)
+    *a = loop do break *1; end; assert_equal([1], a)
+    *a = loop do break *[]; end; assert_equal([nil], a)
+    *a = loop do break *[1]; end; assert_equal([1], a)
+    *a = loop do break *[nil]; end; assert_equal([nil], a)
+    *a = loop do break *[[]]; end; assert_equal([[]], a)
+    *a = loop do break *[1,2]; end; assert_equal([[1,2]], a)
+    *a = loop do break *[*[]]; end; assert_equal([nil], a)
+    *a = loop do break *[*[1]]; end; assert_equal([1], a)
+    *a = loop do break *[*[1,2]]; end; assert_equal([[1,2]], a)
+
+    *a = *loop do break *nil; end; assert_equal([nil], a)
+    *a = *loop do break *1; end; assert_equal([1], a)
+    *a = *loop do break *[]; end; assert_equal([nil], a)
+    *a = *loop do break *[1]; end; assert_equal([1], a)
+    *a = *loop do break *[nil]; end; assert_equal([nil], a)
+    *a = *loop do break *[[]]; end; assert_equal([], a)
+    *a = *loop do break *[1,2]; end; assert_equal([1,2], a)
+    *a = *loop do break *[*[]]; end; assert_equal([nil], a)
+    *a = *loop do break *[*[1]]; end; assert_equal([1], a)
+    *a = *loop do break *[*[1,2]]; end; assert_equal([1,2], a)
+
+    a,b,*c = loop do break; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break nil; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break 1; end; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = loop do break []; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break [1]; end; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = loop do break [nil]; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break [[]]; end; assert_equal([[],nil,[]], [a,b,c])
+    a,b,*c = loop do break [1,2]; end; assert_equal([1,2,[]], [a,b,c])
+    a,b,*c = loop do break [*[]]; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break [*[1]]; end; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = loop do break [*[1,2]]; end; assert_equal([1,2,[]], [a,b,c])
+
+    a,b,*c = loop do break *nil; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break *1; end; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[]; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[1]; end; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[nil]; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[[]]; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[1,2]; end; assert_equal([1,2,[]], [a,b,c])
+    a,b,*c = loop do break *[*[]]; end; assert_equal([nil,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[*[1]]; end; assert_equal([1,nil,[]], [a,b,c])
+    a,b,*c = loop do break *[*[1,2]]; end; assert_equal([1,2,[]], [a,b,c])
   end
 
   def test_next
-    def r(val); a = yield(); assert_equal(a, val); end
+    def r(val); a = yield(); assert_equal(val, a); end
     r(nil){next}
     r(nil){next nil}
     r(1){next 1}
@@ -374,7 +374,7 @@ class TestAssignment < Test::Unit::TestCase
     r([]){next [*[]]}
     r([1]){next [*[1]]}
     r([1,2]){next [*[1,2]]}
-    
+
     r(nil){next *nil}
     r(1){next *1}
     r(nil){next *[]}
@@ -384,8 +384,8 @@ class TestAssignment < Test::Unit::TestCase
     r(nil){next *[*[]]}
     r(1){next *[*[1]]}
     r([1,2]){next *[*[1,2]]}
-    
-    def r(val); *a = yield(); assert_equal(a, val); end
+
+    def r(val); *a = yield(); assert_equal(val, a); end
     r([nil]){next}
     r([nil]){next nil}
     r([1]){next 1}
@@ -397,8 +397,8 @@ class TestAssignment < Test::Unit::TestCase
     r([[]]){next [*[]]}
     r([[1]]){next [*[1]]}
     r([[1,2]]){next [*[1,2]]}
-    
-    def r(val); *a = *yield(); assert_equal(a, val); end
+
+    def r(val); *a = *yield(); assert_equal(val, a); end
     r([nil]){next *nil}
     r([1]){next *1}
     r([nil]){next *[]}
@@ -409,8 +409,8 @@ class TestAssignment < Test::Unit::TestCase
     r([nil]){next *[*[]]}
     r([1]){next *[*[1]]}
     r([1,2]){next *[*[1,2]]}
-    
-    def r(val); a,b,*c = yield(); assert_equal([a,b,c], val); end
+
+    def r(val); a,b,*c = yield(); assert_equal(val, [a,b,c]); end
     r([nil,nil,[]]){next}
     r([nil,nil,[]]){next nil}
     r([1,nil,[]]){next 1}
@@ -422,8 +422,8 @@ class TestAssignment < Test::Unit::TestCase
     r([nil,nil,[]]){next [*[]]}
     r([1,nil,[]]){next [*[1]]}
     r([1,2,[]]){next [*[1,2]]}
-    
-    def r(val); a,b,*c = *yield(); assert_equal([a,b,c], val); end
+
+    def r(val); a,b,*c = *yield(); assert_equal(val, [a,b,c]); end
     r([nil,nil,[]]){next *nil}
     r([1,nil,[]]){next *1}
     r([nil,nil,[]]){next *[]}
@@ -439,31 +439,31 @@ class TestAssignment < Test::Unit::TestCase
   def test_assign2
     a = nil
     assert(defined?(a))
-    assert_equal(a, nil)
-    
+    assert_nil(a)
+
     # multiple asignment
     a, b = 1, 2
     assert(a == 1 && b == 2)
-    
+
     a, b = b, a
     assert(a == 2 && b == 1)
-    
+
     a, = 1,2
-    assert_equal(a, 1)
-    
+    assert_equal(1, a)
+
     a, *b = 1, 2, 3
     assert(a == 1 && b == [2, 3])
-    
+
     a, (b, c), d = 1, [2, 3], 4
     assert(a == 1 && b == 2 && c == 3 && d == 4)
-    
+
     *a = 1, 2, 3
-    assert_equal(a, [1, 2, 3])
-    
+    assert_equal([1, 2, 3], a)
+
     *a = 4
-    assert_equal(a, [4])
-    
+    assert_equal([4], a)
+
     *a = nil
-    assert_equal(a, [nil])
+    assert_equal([nil], a)
   end
 end