<commit_before>'use strict';

// MODULES //

var tape = require( 'tape' );
var isNumber = require( '@stdlib/utils/is-number' );
var isnan = require( '@stdlib/math/base/utils/is-nan' );
var randu = require( '@stdlib/math/base/random/randu' );
var PINF = require( '@stdlib/math/constants/float64-pinf' );
var NINF = require( '@stdlib/math/constants/float64-ninf' );
var EPS = require( '@stdlib/math/constants/float64-eps' );
var mgf = require( './../lib' );


// TESTS //

tape( 'main export is a function', function test( t ) {
	t.ok( true, __filename );
	t.equal( typeof mgf, 'function', 'main export is a function' );
	t.end();
});

tape( 'if provided `NaN` for any parameter, the function returns `NaN`', function test( t ) {
	var y = mgf( NaN, 0.0, 1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );
	y = mgf( 0.0, NaN, 1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );
	y = mgf( 0.0, 1.0, NaN );
	t.equal( isnan( y ), true, 'returns NaN' );
	t.end();
});

tape( 'if provided a nonpositive `alpha`, the function returns `NaN`', function test( t ) {
	var y;

	y = mgf( 2.0, 0.0, 2.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, -1.0, 2.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 0.0, -1.0, 2.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, 1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, PINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, NaN );
	t.equal( isnan( y ), true, 'returns NaN' );

	t.end();
});

tape( 'if provided a nonpositive `beta`, the function returns `NaN`', function test( t ) {
	var y;

	y = mgf( 2.0, 2.0, 0.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, 2.0, -1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 0.0, 2.0, -1/0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, 1.0, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, PINF, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NaN, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	t.end();
});

tape( 'the function evaluates the mgf', function test( t ) {
	var alpha;
	var beta;
	var i;
	var x;
	var y;

	// TODO: Add test fixtures (function is not available in R and Julia)
	for ( i = 0; i < 100; i++ ) {
		x = randu();
		alpha = (randu() * 20.0) + EPS;
		beta = (randu() * 20.0) + EPS;
		y = mgf( x, alpha, beta );
		t.strictEqual( !isnan( y ) && isNumber( y ), true, 'returns a number' );
	}
	t.end();
});<commit_msg>Adjust spacing<commit_after>'use strict';

// MODULES //

var tape = require( 'tape' );
var isNumber = require( '@stdlib/utils/is-number' );
var isnan = require( '@stdlib/math/base/utils/is-nan' );
var randu = require( '@stdlib/math/base/random/randu' );
var PINF = require( '@stdlib/math/constants/float64-pinf' );
var NINF = require( '@stdlib/math/constants/float64-ninf' );
var EPS = require( '@stdlib/math/constants/float64-eps' );
var mgf = require( './../lib' );


// TESTS //

tape( 'main export is a function', function test( t ) {
	t.ok( true, __filename );
	t.equal( typeof mgf, 'function', 'main export is a function' );
	t.end();
});

tape( 'if provided `NaN` for any parameter, the function returns `NaN`', function test( t ) {
	var y = mgf( NaN, 0.0, 1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );
	y = mgf( 0.0, NaN, 1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );
	y = mgf( 0.0, 1.0, NaN );
	t.equal( isnan( y ), true, 'returns NaN' );
	t.end();
});

tape( 'if provided a nonpositive `alpha`, the function returns `NaN`', function test( t ) {
	var y;

	y = mgf( 2.0, 0.0, 2.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, -1.0, 2.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 0.0, -1.0, 2.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, 1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, PINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, NaN );
	t.equal( isnan( y ), true, 'returns NaN' );

	t.end();
});

tape( 'if provided a nonpositive `beta`, the function returns `NaN`', function test( t ) {
	var y;

	y = mgf( 2.0, 2.0, 0.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, 2.0, -1.0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 0.0, 2.0, -1/0 );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, 1.0, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, PINF, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NINF, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	y = mgf( 2.0, NaN, NINF );
	t.equal( isnan( y ), true, 'returns NaN' );

	t.end();
});

tape( 'the function evaluates the mgf', function test( t ) {
	var alpha;
	var beta;
	var i;
	var x;
	var y;

	// TODO: Add test fixtures (function is not available in R and Julia)
	for ( i = 0; i < 100; i++ ) {
		x = randu();
		alpha = ( randu()*20.0 ) + EPS;
		beta = ( randu()*20.0 ) + EPS;
		y = mgf( x, alpha, beta );
		t.strictEqual( !isnan( y ) && isNumber( y ), true, 'returns a number' );
	}
	t.end();
});
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