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expl_basic.test.js
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(function (global) {
global.test = test;
function test()
{
// --- Tests with functions declared in ./expl_*.jsm files
assert( "'function' === typeof fact" );
assert( "'function' === typeof isOdd" );
assert( "'function' === typeof isEven" );
assert( '1 == fact(0)' );
assert( '1 == fact(1)' );
assert( '2 == fact(2)' );
assert( '6 == fact(3)' );
assert( '24 == fact(4)' );
assert( 'false === isOdd( -4 )' );
assert( 'true === isOdd( -3 )' );
assert( 'false === isOdd( -2 )' );
assert( 'true === isOdd( -1 )' );
assert( 'false === isOdd( 0 )' );
assert( 'true === isOdd( 1 )' );
assert( 'false === isOdd( 2 )' );
assert( 'true === isOdd( 3 )' );
assert( 'false === isOdd( 4 )' );
assert( 'true === isOdd( 1001 )' );
assert( 'false === isOdd( 1002 )' );
assert( 'true === isOdd( 1000001 )' );
assert( 'false === isOdd( 1000002 )' );
// No stack issue because the code has been unrolled
assert( 'true === isOdd( 10000001 )' );
assert( 'false === isOdd( 10000002 )' );
assert( 'true === isEven( -4 )' );
assert( 'false === isEven( -3 )' );
assert( 'true === isEven( -2 )' );
assert( 'false === isEven( -1 )' );
assert( 'true === isEven( 0 )' );
assert( 'false === isEven( 1 )' );
assert( 'true === isEven( 2 )' );
assert( 'false === isEven( 3 )' );
assert( 'true === isEven( 4 )' );
assert( 'false === isEven( 1001 )' );
assert( 'true === isEven( 1002 )' );
assert( 'false === isEven( 1000001 )' );
assert( 'true === isEven( 1000002 )' );
// No stack issue because the code has been unrolled
assert( 'false === isEven( 10000001 )' );
assert( 'true === isEven( 10000002 )' );
//#BEGIN_TEST_DEV_ONLY
// --- Tests with functions declared programmatically
// - Test the local `name2info`
// For test purposes: same name 'fact2' as used below,
// but different function (just a sum)
//
// Since we are using a `local_name2info`
// there must not be any impact on the
// global declaration 'fact2` further below
var local_name2info = {}
, local_fun = MetaFunction(
'fact2'
, 'self,k,acc'
, 'acc || (acc = 0); '
+ 'if (k > 0) metaret self, k-1, acc + k;' // sum
+ 'else return acc;'
, local_name2info
)
;
assert( '0 === v( 0 )', local_fun );
assert( '1 === v( 1 )', local_fun );
assert( '3 === v( 2 )', local_fun );
assert( '6 === v( 3 )', local_fun );
assert( '10 === v( 4 )', local_fun );
// No stack issue because the code has been unrolled
assert( '10000*10001/2 === v( 10000 )', local_fun );
// - Test global declarations with dotted names.
// For test purposes: same name 'fact2' as used above and below, but
// different implementation (sum of squares).
//
// Since we are using a name space 'some.name.space' there must not be
// any impact on the above local declaration, and on the similarly
// named global declarations below.
MetaDecl( 'some.name.space.fact2'
, 'self, k, acc'
, 'acc || (acc = 0);'
// sum of squares
+ 'if (k > 0) metaret self, k-1, acc + k * k;'
+ 'else return acc;'
);
assert( '0 === some.name.space.fact2( 0 )' );
assert( '1 === some.name.space.fact2( 1 )' );
assert( '5 === some.name.space.fact2( 2 )' );
assert( '14 === some.name.space.fact2( 3 )' );
assert( '30 === some.name.space.fact2( 4 )' );
// No stack issue because the code has been unrolled
assert( '10000 * 10001 * 20001 / 6 === some.name.space.fact2( 10000 )' )
// - Test global declarations 'fact2', 'isEven2' and 'isOdd2' These
// implementations are similar as those in the script tag (see
// above, at the beginning).
MetaDecl
(
'fact2'
, 'self,k,acc'
, [
'acc || (acc = 1);'
, 'if (k > 1)'
// factorial
, ' metaret self, k - 1, acc * k;'
, 'else'
, ' return acc;'
].join( '\n' )
);
assert( '1 == fact2(0)' );
assert( '1 == fact2(1)' );
assert( '2 == fact2(2)' );
assert( '6 == fact2(3)' );
assert( '24 == fact2(4)' );
assert( '1 == gcd( 7, 5 )' );
assert( '5*13 == gcd( 2 * 5 * 7 * 13, 5 * 13 * 19 )' );
// Let us try the "one string" variant
MetaDecl
(
'metafun isEven2 ( self, n ) {'
+ ' if (n > 0)'
+ ' metaret isOdd2, n - 1;'
+ 'if (n < 0)'
+ ' metaret self, -n;'
+ 'return true;'
+ '}'
);
// Let us try the "one string" variant with "metafun" omitted
MetaDecl
(
'isOdd2(self,n) {'
+ 'if (n > 0)'
+ ' metaret isEven2, n - 1;'
+ 'if (n < 0)'
+ ' metaret self, -n;'
+ 'return false;'
+ '}'
);
assert( 'false === isOdd2( -4 )' );
assert( 'true === isOdd2( -3 )' );
assert( 'false === isOdd2( -2 )' );
assert( 'true === isOdd2( -1 )' );
assert( 'false === isOdd2( 0 )' );
assert( 'true === isOdd2( 1 )' );
assert( 'false === isOdd2( 2 )' );
assert( 'true === isOdd2( 3 )' );
assert( 'false === isOdd2( 4 )' );
assert( 'true === isOdd2( 1001 )' );
assert( 'false === isOdd2( 1002 )' );
assert( 'true === isOdd2( 1000001 )' );
assert( 'false === isOdd2( 1000002 )' );
// No stack issue because the code has been unrolled
assert( 'true === isOdd2( 10000001 )' );
assert( 'false === isOdd2( 10000002 )' );
assert( 'true === isEven2( -4 )' );
assert( 'false === isEven2( -3 )' );
assert( 'true === isEven2( -2 )' );
assert( 'false === isEven2( -1 )' );
assert( 'true === isEven2( 0 )' );
assert( 'false === isEven2( 1 )' );
assert( 'true === isEven2( 2 )' );
assert( 'false === isEven2( 3 )' );
assert( 'true === isEven2( 4 )' );
assert( 'false === isEven2( 1001 )' );
assert( 'true === isEven2( 1002 )' );
assert( 'false === isEven2( 1000001 )' );
assert( 'true === isEven2( 1000002 )' );
// No stack issue because the code has been unrolled
assert( 'false === isEven2( 10000001 )' );
assert( 'true === isEven2( 10000002 )' );
// --- Test again `local_fun` to make sure it as not been affected by
// --- the global declaration `fact2`
assert( '0 === v( 0 )', local_fun );
assert( '1 === v( 1 )', local_fun );
assert( '3 === v( 2 )', local_fun );
assert( '6 === v( 3 )', local_fun );
assert( '10 === v( 4 )', local_fun );
// No stack issue because the code has been unrolled
assert( '10000*10001/2 === v( 10000 )', local_fun );
// --- Test again `some.name.space.fact2` to make sure it as not been
// --- affected by the global declaration `fact2`
assert( '0 === some.name.space.fact2( 0 )' );
assert( '1 === some.name.space.fact2( 1 )' );
assert( '5 === some.name.space.fact2( 2 )' );
assert( '14 === some.name.space.fact2( 3 )' );
assert( '30 === some.name.space.fact2( 4 )' );
// No stack issue because the code has been unrolled
assert( '10000 * 10001 * 20001 / 6 === some.name.space.fact2( 10000 )' );
//#END_TEST_DEV_ONLY
// ---
'undefined' !== typeof console && console.log('All tests passed.');
return true;
}
// ---
function assert(codestring, /*?optional?*/v)
{
if (!new Function( 'v', 'return ' + codestring + ';' )( v ))
throw new Error( 'Failed test: ' + codestring );
}
})(this);