test: migrate math/base/special/atan2 to ULP-based testing

PR-URL: #11658
Reviewed-by: Athan Reines <kgryte@gmail.com>
Ref: #11352

Author: MANDEep22332

lib/node_modules/@stdlib/math/base/special/atan2/test/test.js

@@ -24,8 +24,7 @@ var tape = require( 'tape' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var isNegativeZero = require( '@stdlib/math/base/assert/is-negative-zero' );
 var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
-var abs = require( '@stdlib/math/base/special/abs' );
-var EPS = require( '@stdlib/constants/float64/eps' );
+var isAlmostSameValue = require( '@stdlib/assert/is-almost-same-value' );
 var PINF = require( '@stdlib/constants/float64/pinf' );
 var NINF = require( '@stdlib/constants/float64/ninf' );
 var PI = require( '@stdlib/constants/float64/pi' );
@@ -187,8 +186,6 @@ tape( 'the function returns `-PI/2` if provided a negative `y` and `x=-0`', func
 tape( 'the function evaluates the `atan2` function (when x and y are positive)', function test( t ) {
 	var expected;
 	var actual;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
@@ -198,18 +195,14 @@ tape( 'the function evaluates the `atan2` function (when x and y are positive)',
 	expected = positivePositive.expected;
 	for ( i = 0; i < x.length; i++ ) {
 		actual = atan2( y[i], x[i] );
-		delta = abs( actual - expected[i] );
-		tol = EPS * abs( expected[i] );
-		t.strictEqual( delta <= tol, true, 'within tolerance. y: '+y[i]+'. x: '+x[i]+'. Actual: '+actual+'. E: '+expected[i]+'. tol: '+tol+'. Δ: '+delta+'.' );
+		t.strictEqual( isAlmostSameValue( actual, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the `atan2` function (when x is negative and y is positive)', function test( t ) {
 	var expected;
 	var actual;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
@@ -219,18 +212,14 @@ tape( 'the function evaluates the `atan2` function (when x is negative and y is
 	expected = negativePositive.expected;
 	for ( i = 0; i < x.length; i++ ) {
 		actual = atan2( y[i], x[i] );
-		delta = abs( actual - expected[i] );
-		tol = 2.0 * EPS * abs( expected[i] );
-		t.strictEqual( delta <= tol, true, 'within tolerance. y: '+y[i]+'. x: '+x[i]+'. Actual: '+actual+'. E: '+expected[i]+'. tol: '+tol+'. Δ: '+delta+'.' );
+		t.strictEqual( isAlmostSameValue( actual, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });
 
 tape( 'the function evaluates the `atan2` function (when x and y are negative)', function test( t ) {
 	var expected;
 	var actual;
-	var delta;
-	var tol;
 	var x;
 	var y;
 	var i;
@@ -240,9 +229,7 @@ tape( 'the function evaluates the `atan2` function (when x and y are negative)',
 	expected = negativeNegative.expected;
 	for ( i = 0; i < x.length; i++ ) {
 		actual = atan2( y[i], x[i] );
-		delta = abs( actual - expected[i] );
-		tol = 2.0 * EPS * abs( expected[i] );
-		t.strictEqual( delta <= tol, true, 'within tolerance. y: '+y[i]+'. x: '+x[i]+'. Actual: '+actual+'. E: '+expected[i]+'. tol: '+tol+'. Δ: '+delta+'.' );
+		t.strictEqual( isAlmostSameValue( actual, expected[ i ], 2 ), true, 'returns expected value' );
 	}
 	t.end();
 });