rubyx/test/test_parser.rb

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require_relative 'helper'
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# Some sanity is emerging in the testing of parsers
# (Parsers are fiddly in respect to space and order, small changes may and do have unexpected effects)
# For any functionality that we want to work (ie test), there are actually three tests, with the _same_ name
# One in each of the parser/transform/ast classes
# Parser test that the parser parses and thet the output is correct. Rules are named and and boil down to
# hashes and arrays with lots of symbols for the names the rules (actually the reults) were given
# Transform test really just test the tranformation. They basically take the output of the parse
# and check that correct Ast classes are produced
# Ast tests both steps in one. Ie string input to ast classes output
# All threee classes are layed out quite similarly in that they use a check method and
# each test assigns @input and @parse_output which the check methods then checks
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# The check methods have a pust in it (to be left) which is very handy for checking
# also the output of parser.check can actually be used as the input of transform
# Repeat: For every test in parser, there should beone in transform and ast
# The test in transform should use the output of parser as input
# The test in ast should expect the same result as transform
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class ParserTest < MiniTest::Test
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def setup
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@parser = Parser::Composed.new
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end
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def check
is = @parser.parse(@input)
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#puts is.inspect
assert_equal @parse_output , is
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end
def test_one_argument
@input = '(42)'
@parse_output = {:argument_list => {:argument => {:integer => '42'}} }
@parser = @parser.argument_list
check
end
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def test_argument_list
@input = '(42, foo)'
@parse_output = {:argument_list => [{:argument => {:integer => '42'}},
{:argument => {:name => 'foo'}}]}
@parser = @parser.argument_list
check
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end
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def test_function_call
@input = 'baz(42, foo)'
@parse_output = {:function_call => {:name => 'baz' },
:argument_list => [{:argument => {:integer => '42'}},
{:argument => {:name => 'foo'}}]}
@parser = @parser.function_call
check
end
def test_function_call_string
@input = <<HERE
puts( "hello")
HERE
@parse_output = {:function_call => {:name => 'baz' },
:argument_list => [{:argument => {:integer => '42'}},
{:argument => {:name => 'foo'}}]}
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@parser = @parser.function_call
check
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end
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def test_expression_else
@input = <<HERE
4
5
else
HERE
@parse_output = {:expressions=>[{:integer=>"4"}, {:integer=>"5"}]}
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@parser = @parser.expressions_else
check
end
def test_expression_end
@input = <<HERE
5
name
call(4,6)
end
HERE
@parse_output = {:expressions => [ { :integer => "5" },
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{ :name => "name" },
{ :function_call => { :name => "call" } ,
:argument_list => [ {:argument => { :integer => "4" } } ,
{:argument => { :integer => "6" } } ] } ]}
@parser = @parser.expressions_end
check
end
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def test_conditional
@input = <<HERE
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if (0)
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42
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else
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667
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end
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HERE
@parse_output = { :conditional => { :integer => "0"},
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:if_true => { :expressions => [ { :integer => "42" } ] } ,
:if_false => { :expressions => [ { :integer => "667" } ] } }
@parser = @parser.conditional
check
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end
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def test_function_definition
@input = <<HERE
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def foo(x)
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5
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end
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HERE
@parse_output = {:function_definition => {:name => 'foo'},
:parmeter_list => {:parmeter => {:name => 'x'}},
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:expressions => [{:integer => '5'}]}
@parser = @parser.function_definition
check
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end
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def test_function_assignment
@input = <<HERE
def foo(x)
abba = 5
end
HERE
@parse_output = { :function_definition => { :name => "foo" } ,
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:parmeter_list => { :parmeter => { :name => "x" } },
:expressions => [ { :asignee => { :name => "abba" }, :asigned => { :integer => "5" } } ]
}
@parser = @parser.function_definition
check
end
def test_assignment
@input = "a = 5"
@parse_output = { :asignee => { :name=>"a" } , :asigned => { :integer => "5" } }
@parser = @parser.assignment
check
end
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end