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LabelTest.php
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LabelTest.php
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<?php
namespace Tests\Polygen\Integration\Language\Interpretation\Interpreter;
use Polygen\Language\Document;
use Polygen\Language\Interpretation\Context;
use Polygen\Polygen;
use Tests\StreamUtils;
use Tests\TestCase;
/**
* A few tests involving label selection.
*/
class LabelTest extends TestCase
{
use StreamUtils;
/**
* This example was lifted directly from the Polygen documentation (section 2.0.5.1 "Etichette e selezione")
* @test
* @param int $seed
* @dataProvider provider_selection_feed
*/
public function it_correctly_selects_labels($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= Nome.S mangia Nome.P | (Nome mangiano Nome).P ;
Nome ::= (S: il | P: i) (lup | gatt) ^ (S: o | P: i) ;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$acceptable = [
'il lupo mangia i lupi',
'il lupo mangia i gatti',
'il gatto mangia i lupi',
'il gatto mangia i gatti',
'i lupi mangiano i lupi',
'i lupi mangiano i gatti',
'i gatti mangiano i lupi',
'i gatti mangiano i gatti',
];
$this->assertContains($generated, $acceptable);
}
/**
* @return \string[][]
*/
public function provider_selection_feed()
{
// At the time of writing, most of these numbers produced invalid results.
return [
['0'],
['1'],
['2'],
['3'],
['4'],
['5'],
['6'],
['7'],
['8'],
['9'],
];
}
/**
* @test
*/
public function non_terminating_symbols_cant_reset_the_label_selections()
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
I ::= test;
S ::= A.a;
A ::= a: a B and. C;
B ::= a: b | c: nope;
(*
This test also triggers the case where all productions have been excluded from generation, since
there are no productions suitable for generation in C.
*)
C ::= g: c;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START));
$this->assertEquals('a b and', $generated);
}
/**
* This example was lifted directly from the Polygen documentation (section 2.0.5.1 "Etichette e selezione") with
* just a minor adjustment because apparently the example in the documentation was not valid due to an extra closed
* parenthesis. :)
*
* @test
* @dataProvider provider_label_propagation
*/
public function it_propagates_label_selections($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= (Ogg.M | Ogg.F).S | (Ogg.M | Ogg.F).P ;
Ogg ::= M: ((Art Sost).il | (Art Sost).lo)
| F: Art Sost ;
Art ::= M: (il: (S: il | P: i) | lo: (S: lo | P: gli))
| F: (S: la | P: le) ;
Sost ::= M: ( il: (lup ^ Decl.2 | can ^ Decl.3) (* ) *)
| lo: (gnom ^ Decl.2 | zabaion ^ Decl.3))
| F: pecor ^ Decl.1 ;
Decl ::= 1: (S: a | P: e) | 2: (S: o | P: i) | 3: (S: e | P: i) ;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$acceptable = [
'il lupo',
'il cane',
'lo gnomo',
'lo zabaione',
'la pecora',
'i lupi',
'i cani',
'gli gnomi',
'gli zabaioni',
'le pecore',
];
$this->assertContains($generated, $acceptable);
}
public function provider_label_propagation()
{
// At the time of writing, these seeds generated all possible productions.
return [
['332'], // lo gnomo
['19'], // gli gnomi
['10'], // la pecora
['1'], // le pecore
['2'], // il lupo
['15'], // i lupi
['4'], // il cane
['13'], // i cani
['30'], // lo zabaione
['3'], // gli zabaioni
];
}
/**
* This example was lifted directly from the Polygen documentation (section 2.0.5.1 "Etichette e selezione")
* @test
*/
public function it_supports_multiple_label_selection_groups()
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= Ogg.(M|F).(S|P) ;
Ogg ::= M: ((Art Sost).il | (Art Sost).lo)
| F: Art Sost ;
Art ::= M: (il: (S: il | P: i) | lo: (S: lo | P: gli))
| F: (S: la | P: le) ;
Sost ::= M: ( il: (lup ^ Decl.2 | can ^ Decl.3) (* ) *)
| lo: (gnom ^ Decl.2 | zabaion ^ Decl.3))
| F: pecor ^ Decl.1 ;
Decl ::= 1: (S: a | P: e) | 2: (S: o | P: i) | 3: (S: e | P: i) ;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START));
$acceptable = [
'il lupo',
'il cane',
'lo gnomo',
'lo zabaione',
'la pecora',
'i lupi',
'i cani',
'gli gnomi',
'gli zabaioni',
'le pecore',
];
$this->assertContains($generated, $acceptable, $context->getSeed());
}
/**
* Even though this is not advertised in the documentation, it is possible to enforce multiple label selections
* by consecutively adding a dot and then a label name, concatenating the selections.
* @test
*/
public function it_supports_multiple_consecutive_label_selections()
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= Ogg.F.P ;
Ogg ::= M: ((Art Sost).il | (Art Sost).lo)
| F: Art Sost ;
Art ::= M: (il: (S: il | P: i) | lo: (S: lo | P: gli))
| F: (S: la | P: le) ;
Sost ::= M: ( il: (lup ^ Decl.2 | can ^ Decl.3) (* ) *)
| lo: (gnom ^ Decl.2 | zabaion ^ Decl.3))
| F: pecor ^ Decl.1 ;
Decl ::= 1: (S: a | P: e) | 2: (S: o | P: i) | 3: (S: e | P: i) ;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START));
$this->assertEquals($generated, 'le pecore', $context->getSeed());
}
/**
* @test
* @dataProvider provider_label_selection_processing_order
* This test verifies that since the dot is the rightmost character in the label selection, and being processed
* first, the one and b label selections are still applied, thus only generating 'b'.
*/
public function it_processes_label_selections_from_right_to_left_1($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= Generate.one.b.;
Generate ::= a: A | b: B;
A ::= one: a | two: aa;
B ::= one: b | two: bb;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$this->assertEquals($generated, 'b', $context->getSeed());
}
public function provider_label_selection_processing_order()
{
return [
['1'],
['2'],
['3'],
['4'],
['5'],
['6'],
['7'],
['8'],
['9'],
['0'],
];
}
/**
* @test
* @dataProvider provider_left_to_right_selection_2
* This test checks that the labels selected after the double dot are ignored.
* @param string $seed
*/
public function it_processes_label_selections_from_right_to_left_2($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= Generate.one.a..two.b Generate.two.a..one.b Generate.one.b..two.a Generate.two.b..one.a;
Generate ::= a: A | b: B;
A ::= one: a | two: aa;
B ::= one: b | two: bb;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$this->assertEquals($generated, 'a aa b bb');
}
public function provider_left_to_right_selection_2()
{
return [
['1'],
['2'],
['3'],
['4'],
['5'],
['6'],
['7'],
['8'],
['9'],
['0'],
];
}
/**
* This example was lifted directly from the Polygen documentation (section 2.0.5.1 "Etichette e selezione")
* @test
*/
public function it_correctly_resets_the_label_selection_environment()
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= Cifra | S.nz [^S.] ;
Cifra ::= z: 0 | nz: >(1| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9) ;
GRAMMAR
),
Document::START
);
// This seed caused an invalid generation at the time of writing
$generated = $polygen->generate($document, $context = Context::get(Document::START));
$this->assertRegExp('{(0|[1-9][0-9]*)}', $generated, $context->getSeed());
}
/**
* @test
* @dataProvider provider_no_label_selection
*/
public function it_can_select_any_label_if_no_selection_is_specified($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= A.a | A;
A ::= a: a | b: b | c;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$acceptable = [
'a',
'b',
'c'
];
$this->assertContains($generated, $acceptable, $context->getSeed());
}
public function provider_no_label_selection()
{
// These three values covered all the possible outputs at the time of writing.
return [
['1'],
['3'],
['11'],
];
}
/**
* @test
* @param string $seed
* @dataProvider provider_multiple_label_selection
*/
public function it_supports_multiple_label_selection($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
<<<GRAMMAR
S ::= (sei (M: un | F: una) (M: bel | F: bella) ragazz ^ (M: o | F: a)).(M|F) ;
GRAMMAR
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$acceptable = [
'sei una bella ragazza',
'sei un bel ragazzo',
];
$this->assertContains($generated, $acceptable, $context->getSeed());
}
public function provider_multiple_label_selection()
{
return [
['1'],
['2'],
['3'],
['4'],
['5'],
['6'],
['7'],
['8'],
['9'],
['0'],
];
}
/**
* This example is taken directly from the Polygen documentation, section 2.0.12 "Generazione posizionale".
* @test
* @param string $seed
* @dataProvider provider_positional_selection
*/
public function it_supports_positional_selection($seed)
{
$polygen = new Polygen();
$document = $polygen->getDocument(
$this->given_a_source_stream(
'S ::= sei un,una bel,bella ragazz ^ o,a ;'
),
Document::START
);
$generated = $polygen->generate($document, $context = Context::get(Document::START, $seed));
$acceptable = [
'sei un bel ragazzo',
'sei una bella ragazza',
];
$this->assertContains($generated, $acceptable, "Positional selection failed for seed {$context->getSeed()}");
}
public function provider_positional_selection()
{
return [
['1'],
['2'],
['3'],
['4'],
['5'],
['6'],
['7'],
['8'],
['9'],
['0'],
];
}
}