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