fix: reduce tolerance to zero and use deepequals

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---

Author: aayush0325

lib/node_modules/@stdlib/lapack/base/dgtts2/test/fixtures/col_major_no_offset_no_trans.json

@@ -32,7 +32,7 @@
 
   "LDB": 3,
 
-  "expected": [1.7455555555  ,     0.017777778      ,  0.25,
-  1.9494841268814838, 0.2020634924740646 ,0.3303571422592474,
-  1.6183333331681546, 0.526666667327381 , 0.3749999983258929]
+  "expected": [1.7455555555     ,   0.017777778 ,        0.25,
+  1.9494841268814838 , 0.2020634924740646 , 0.33035714225924745,
+  1.6183333331681546 , 0.526666667327381  , 0.37499999832589287]
 }

lib/node_modules/@stdlib/lapack/base/dgtts2/test/fixtures/col_major_no_offset_trans.json

@@ -31,7 +31,7 @@
 
   "LDB": 3,
 
-  "expected": [ 1.7503174605488945 ,-0.0012698421955782274,  0.2547619050488946,
-  1.9566269844548256  ,0.1734920621806973 , 0.3494047624548257,
-  1.6278571432659439 , 0.4885714269362245 , 0.4178571437659439]
+  "expected": [ 1.7503174605488945 ,   -0.0012698421955782274 , 0.25476190504889457,
+  1.9566269844548256    , 0.1734920621806973 ,    0.34940476245482566,
+  1.6278571432659439    , 0.48857142693622446  ,  0.4178571437659439   ]
 }

lib/node_modules/@stdlib/lapack/base/dgtts2/test/fixtures/row_major_no_offset_no_trans.json

@@ -32,7 +32,7 @@
 
   "LDB": 3,
 
-  "expected": [1.4031746026466836, 0.3769841267155612 ,0.1884920633577806,
-  1.3873015894132654 ,0.4920634931377552, 0.2460317465688776,
-  1.4285714242665817 ,0.8928571414221939, 0.4464285707110969]
+  "expected": [1.4031746026466836  ,0.3769841267155612 , 0.1884920633577806,
+  1.3873015894132654 , 0.49206349313775516, 0.24603174656887758,
+  1.4285714242665817 , 0.8928571414221939 , 0.44642857071109693]
 }

lib/node_modules/@stdlib/lapack/base/dgtts2/test/fixtures/row_major_no_offset_trans.json

@@ -32,7 +32,7 @@
 
   "LDB": 3,
 
-  "expected": [1.4365079379889456 ,0.3960317469111395 ,0.1980158734555697,
-  1.2539682480442178, 0.4158730123554421, 0.2079365061777211,
-  1.5476190504889455, 0.9404761919111395 ,0.4702380959555698]
+  "expected": [1.4365079379889456 , 0.39603174691113946, 0.19801587345556973,
+  1.2539682480442178  ,0.4158730123554421 , 0.20793650617772105,
+  1.5476190504889455 , 0.9404761919111395 , 0.47023809595556976]
 }

lib/node_modules/@stdlib/lapack/base/dgtts2/test/test.dgtts2.js

@@ -25,8 +25,6 @@
 var tape = require( 'tape' );
 var Int32Array = require( '@stdlib/array/int32' );
 var Float64Array = require( '@stdlib/array/float64' );
-var EPS = require( '@stdlib/constants/float64/eps' );
-var abs = require( '@stdlib/math/base/special/abs' );
 var dgtts2 = require( './../lib/dgtts2.js' );
 
 
@@ -38,35 +36,6 @@ var ROW_MAJOR_NO_OFFSET_TRANS = require( './fixtures/row_major_no_offset_trans.j
 var ROW_MAJOR_NO_OFFSET_NO_TRANS = require( './fixtures/row_major_no_offset_no_trans.json' );
 
 
-// FUNCTIONS //
-
-/**
-* Tests for element-wise approximate equality.
-*
-* @private
-* @param {Object} t - test object
-* @param {Collection} actual - actual values
-* @param {Collection} expected - expected values
-* @param {number} rtol - relative tolerance
-*/
-function isApprox( t, actual, expected, rtol ) {
-	var delta;
-	var tol;
-	var i;
-
-	t.strictEqual( actual.length, expected.length, 'returns expected value' );
-	for ( i = 0; i < expected.length; i++ ) {
-		if ( actual[ i ] === expected[ i ] ) {
-			t.strictEqual( actual[ i ], expected[ i ], 'returns expected value' );
-		} else {
-			delta = abs( actual[ i ] - expected[ i ] );
-			tol = rtol * EPS * abs( expected[ i ] );
-			t.ok( delta <= tol, 'within tolerance. actual: '+actual[ i ]+'. expected: '+expected[ i ]+'. delta: '+delta+'. tol: '+tol+'.' );
-		}
-	}
-}
-
-
 // TESTS //
 
 tape( 'main export is a function', function test( t ) {
@@ -160,7 +129,7 @@ tape( 'the function returns the input array unchanged if N is zero', function te
 	B = new Float64Array( data.B );
 
 	X = dgtts2( data.order, data.itrans, 0, data.nrhs, DL, D, DU, DU2, IPIV, B, data.LDB );
-	t.deepEqual( B, X );
+	t.deepEqual( B, X, 'returns expected value' );
 
 	t.end();
 });
@@ -188,7 +157,7 @@ tape( 'the function solves A * X = B (row-major)', function test( t ) {
 	X = dgtts2( data.order, data.itrans, data.N, data.nrhs, DL, D, DU, DU2, IPIV, B, data.LDB );
 
 	expectedX = new Float64Array( data.expected );
-	isApprox( t, X, expectedX, 1.0 );
+	t.deepEqual( X, expectedX, 'returns expected value' );
 
 	t.end();
 });
@@ -216,7 +185,7 @@ tape( 'the function solves A * X = B (column-major)', function test( t ) {
 	X = dgtts2( data.order, data.itrans, data.N, data.nrhs, DL, D, DU, DU2, IPIV, B, data.LDB );
 
 	expectedX = new Float64Array( data.expected );
-	isApprox( t, X, expectedX, 1.0 );
+	t.deepEqual( X, expectedX, 'returns expected value' );
 
 	t.end();
 });
@@ -244,7 +213,7 @@ tape( 'the function solves A**T * X = B (row-major)', function test( t ) {
 	X = dgtts2( data.order, data.itrans, data.N, data.nrhs, DL, D, DU, DU2, IPIV, B, data.LDB );
 
 	expectedX = new Float64Array( data.expected );
-	isApprox( t, X, expectedX, 1.5 );
+	t.deepEqual( X, expectedX, 'returns expected value' );
 
 	t.end();
 });
@@ -272,7 +241,7 @@ tape( 'the function solves A**T * X = B (column-major)', function test( t ) {
 	X = dgtts2( data.order, data.itrans, data.N, data.nrhs, DL, D, DU, DU2, IPIV, B, data.LDB );
 
 	expectedX = new Float64Array( data.expected );
-	isApprox( t, X, expectedX, 1.0 );
+	t.deepEqual( X, expectedX, 'returns expected value' );
 
 	t.end();
 });