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test: add tests to stats/base/dists/geometric/mgf
PR-URL: #10483 Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com> Signed-off-by: Vishal Gaikwad <154438441+ivishal-g@users.noreply.github.com>
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3 files changed

Lines changed: 146 additions & 5 deletions

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‎lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/test/test.factory.js‎

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -23,6 +23,7 @@
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var tape = require( 'tape' );
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var abs = require( '@stdlib/math/base/special/abs' );
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var ln = require( '@stdlib/math/base/special/ln' );
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var PINF = require( '@stdlib/constants/float64/pinf' );
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var NINF = require( '@stdlib/constants/float64/ninf' );
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var EPS = require( '@stdlib/constants/float64/eps' );
@@ -148,3 +149,15 @@ tape( 'the created function evaluates the mgf for `x` given large parameter `p`'
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}
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t.end();
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});
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tape( 'the factory function returns NaN when t equals the boundary condition t = -ln(1-p)', function test( t ) {
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var boundary;
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var mgf;
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var y;
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mgf = factory( 0.5 );
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boundary = -ln( 1 - 0.5 );
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y = mgf( boundary );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});

‎lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/test/test.mgf.js‎

Lines changed: 66 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -26,6 +26,9 @@ var abs = require( '@stdlib/math/base/special/abs' );
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var PINF = require( '@stdlib/constants/float64/pinf' );
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var NINF = require( '@stdlib/constants/float64/ninf' );
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var EPS = require( '@stdlib/constants/float64/eps' );
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var isfinite = require( '@stdlib/math/base/assert/is-finite' );
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var ln = require( '@stdlib/math/base/special/ln' );
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var exp = require( '@stdlib/math/base/special/exp' );
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var mgf = require( './../lib' );
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@@ -69,7 +72,7 @@ tape( 'if provided a value outside `[0,1]` for success probability `p`, the func
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t.end();
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});
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72-
tape( 'the function evaluates the mgf for `x` given small parameter `p`', function test( t ) {
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tape( 'the function evaluates the MGF for `x` given small parameter `p`', function test( t ) {
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var expected;
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var delta;
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var tol;
@@ -94,7 +97,7 @@ tape( 'the function evaluates the mgf for `x` given small parameter `p`', functi
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t.end();
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});
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97-
tape( 'the function evaluates the mgf for `x` given large parameter `p`', function test( t ) {
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tape( 'the function evaluates the MGF for `x` given large parameter `p`', function test( t ) {
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var expected;
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var delta;
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var tol;
@@ -118,3 +121,64 @@ tape( 'the function evaluates the mgf for `x` given large parameter `p`', functi
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}
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t.end();
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});
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tape( 'the function returns NaN when t equals the boundary condition t = -ln(1-p)', function test( t ) {
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var boundary;
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var p;
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var y;
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p = 0.5;
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boundary = -ln( 1 - p );
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y = mgf( boundary, p );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns a finite value when t is just below the boundary condition', function test( t ) {
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var boundary;
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var p;
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var y;
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p = 0.5;
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boundary = -ln( 1 - p );
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y = mgf( boundary - 1e-15, p );
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t.strictEqual( isnan( y ), false, 'returns expected value' );
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t.ok( isfinite( y ), 'value is finite' );
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t.end();
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});
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tape( 'the function returns NaN when t is just above the boundary condition', function test( t ) {
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var boundary;
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var p;
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var y;
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p = 0.5;
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boundary = -ln( 1 - p );
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y = mgf( boundary + 1e-15, p );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns NaN when p equals 0', function test( t ) {
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var y;
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y = mgf( 0.5, 0.0 );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns e^t when p equals 1', function test( t ) {
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var y;
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y = mgf( 0.5, 1.0 );
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t.strictEqual( y, exp( 0.5 ), 'returns expected value' );
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t.end();
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});
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tape( 'the function returns NaN for very small p values due to boundary condition', function test( t ) {
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var y;
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y = mgf( 0.001, 1e-10 );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});

‎lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/test/test.native.js‎

Lines changed: 67 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -22,12 +22,15 @@
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var resolve = require( 'path' ).resolve;
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var tape = require( 'tape' );
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var tryRequire = require( '@stdlib/utils/try-require' );
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var abs = require( '@stdlib/math/base/special/abs' );
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var PINF = require( '@stdlib/constants/float64/pinf' );
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var NINF = require( '@stdlib/constants/float64/ninf' );
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var EPS = require( '@stdlib/constants/float64/eps' );
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var tryRequire = require( '@stdlib/utils/try-require' );
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var isfinite = require( '@stdlib/math/base/assert/is-finite' );
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var ln = require( '@stdlib/math/base/special/ln' );
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var exp = require( '@stdlib/math/base/special/exp' );
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// FIXTURES //
@@ -78,7 +81,7 @@ tape( 'if provided a value outside `[0,1]` for success probability `p`, the func
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t.end();
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});
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81-
tape( 'the function evaluates the mgf for `x` given small parameter `p`', opts, function test( t ) {
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tape( 'the function evaluates the MGF for `x` given small parameter `p`', opts, function test( t ) {
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var expected;
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var delta;
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var tol;
@@ -103,7 +106,7 @@ tape( 'the function evaluates the mgf for `x` given small parameter `p`', opts,
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t.end();
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});
105108

106-
tape( 'the function evaluates the mgf for `x` given large parameter `p`', opts, function test( t ) {
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tape( 'the function evaluates the MGF for `x` given large parameter `p`', opts, function test( t ) {
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var expected;
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var delta;
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var tol;
@@ -127,3 +130,64 @@ tape( 'the function evaluates the mgf for `x` given large parameter `p`', opts,
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}
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t.end();
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});
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tape( 'the function returns NaN when t equals the boundary condition t = -ln(1-p)', opts, function test( t ) {
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var boundary;
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var p;
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var y;
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p = 0.5;
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boundary = -ln( 1 - p );
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y = mgf( boundary, p );
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t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});
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146+
tape( 'the function returns a finite value when t is just below the boundary condition', opts, function test( t ) {
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var boundary;
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var p;
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var y;
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151+
p = 0.5;
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boundary = -ln( 1 - p );
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y = mgf( boundary - 1e-15, p );
154+
t.strictEqual( isnan( y ), false, 'returns expected value' );
155+
t.ok( isfinite( y ), 'value is finite' );
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t.end();
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});
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159+
tape( 'the function returns NaN when t is just above the boundary condition', opts, function test( t ) {
160+
var boundary;
161+
var p;
162+
var y;
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164+
p = 0.5;
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boundary = -ln( 1 - p );
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y = mgf( boundary + 1e-15, p );
167+
t.strictEqual( isnan( y ), true, 'returns expected value' );
168+
t.end();
169+
});
170+
171+
tape( 'the function returns NaN when p equals 0', opts, function test( t ) {
172+
var y;
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174+
y = mgf( 0.5, 0.0 );
175+
t.strictEqual( isnan( y ), true, 'returns expected value' );
176+
t.end();
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});
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179+
tape( 'the function returns e^t when p equals 1', opts, function test( t ) {
180+
var y;
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182+
y = mgf( 0.5, 1.0 );
183+
t.strictEqual( y, exp( 0.5 ), 'returns expected value' );
184+
t.end();
185+
});
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187+
tape( 'the function returns NaN for very small p values due to boundary condition', opts, function test( t ) {
188+
var y;
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190+
y = mgf( 0.001, 1e-10 );
191+
t.strictEqual( isnan( y ), true, 'returns expected value' );
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t.end();
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});

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