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test: add ndarray tests
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‎lib/node_modules/@stdlib/lapack/base/dgebal/test/test.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2024 The Stdlib Authors.
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.

‎lib/node_modules/@stdlib/lapack/base/dgebal/test/test.ndarray.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2025 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* eslint-disable array-element-newline */
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'use strict';
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// MODULES //
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var tape = require( 'tape' );
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var Float64Array = require( '@stdlib/array/float64' );
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var dgebal = require( './../lib/ndarray.js' );
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// TESTS //
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tape( 'main export is a function', function test( t ) {
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t.ok( true, __filename );
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t.strictEqual( typeof dgebal, 'function', 'main export is a function' );
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t.end();
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});
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tape( 'the function has an arity of 12', function test( t ) {
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t.strictEqual( dgebal.length, 12, 'returns expected value' );
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t.end();
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});
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tape( 'the function throws an error if provided an invalid second argument', function test( t ) {
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var values;
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var scale;
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var out;
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var A;
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var i;
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values = [
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'foo',
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'bar',
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'beep',
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'boop'
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];
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A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] );
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out = new Float64Array( 2 );
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scale = new Float64Array( 2 );
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for ( i = 0; i < values.length; i++ ) {
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t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
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}
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t.end();
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function badValue( value ) {
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return function badValue() {
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dgebal( value, 2, A, 2, 1, 0, out, 1, 0, scale, 1, 0 );
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};
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}
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});
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tape( 'the function returns invalid indices and leaves the input array unchanged for N = 0', function test( t ) {
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var expectedOut;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] );
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out = new Float64Array( 2 );
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scale = new Float64Array( 2 );
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info = dgebal( 'B', 0, A, 2, 1, 0, out, 1, 0, scale, 1, 0 );
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expectedOut = new Float64Array( [ 0.0, -1.0 ] );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = N (row-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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1.0, 2.0, 3.0,
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4.0, 5.0, 6.0,
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7.0, 8.0, 9.0
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 2.0 ] );
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expectedScale = new Float64Array( [ 1.0, 1.0, 1.0 ] );
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expectedA = new Float64Array([
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1.0, 2.0, 3.0,
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4.0, 5.0, 6.0,
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7.0, 8.0, 9.0
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]);
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info = dgebal( 'N', 3, A, 3, 1, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = N (column-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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1.0, 4.0, 7.0,
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2.0, 5.0, 8.0,
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3.0, 6.0, 9.0
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 2.0 ] );
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expectedScale = new Float64Array( [ 1.0, 1.0, 1.0 ] );
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expectedA = new Float64Array([
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1.0, 4.0, 7.0,
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2.0, 5.0, 8.0,
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3.0, 6.0, 9.0
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]);
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info = dgebal( 'B', 3, A, 1, 3, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = P (row-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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1.0, 0.0, 2.0,
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0.0, 5.0, 0.0,
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3.0, 0.0, 4.0
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 1.0 ] );
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expectedScale = new Float64Array( [ 1.0, 1.0, 1.0 ] );
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expectedA = new Float64Array([
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1.0, 2.0, 0.0,
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3.0, 4.0, 0.0,
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0.0, 0.0, 5.0
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]);
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info = dgebal( 'P', 3, A, 3, 1, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = P (column-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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1.0, 0.0, 3.0,
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0.0, 5.0, 0.0,
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2.0, 0.0, 4.0
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 1.0 ] );
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expectedScale = new Float64Array( [ 1.0, 1.0, 1.0 ] );
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expectedA = new Float64Array([
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1.0, 3.0, 0.0,
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2.0, 4.0, 0.0,
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0.0, 0.0, 5.0
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]);
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info = dgebal( 'B', 3, A, 1, 3, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = S (row-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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16.0, 16.0, 16.0,
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0.25, 0.25, 0.25,
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0.25, 0.25, 0.25
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 2.0 ] );
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expectedScale = new Float64Array( [ 1.0, 0.125, 0.125 ] );
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expectedA = new Float64Array([
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16.0, 2.0, 2.0,
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2.0, 0.25, 0.25,
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2.0, 0.25, 0.25
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]);
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info = dgebal( 'S', 3, A, 3, 1, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = S (column-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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16.0, 0.25, 0.25,
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16.0, 0.25, 0.25,
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16.0, 0.25, 0.25
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 2.0 ] );
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expectedScale = new Float64Array( [ 1.0, 0.125, 0.125 ] );
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expectedA = new Float64Array([
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16.0, 2.0, 2.0,
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2.0, 0.25, 0.25,
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2.0, 0.25, 0.25
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]);
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info = dgebal( 'B', 3, A, 1, 3, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = B (row-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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1.0, 0.0, 2.0,
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0.0, 5.0, 0.0,
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100.0, 0.0, 4.0
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 1.0 ] );
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expectedScale = new Float64Array( [ 0.125, 1.0, 1.0 ] );
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expectedA = new Float64Array([
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1.0, 16.0, 0.0,
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12.5, 4.0, 0.0,
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0.0, 0.0, 5.0
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]);
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info = dgebal( 'B', 3, A, 3, 1, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});
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tape( 'the function returns expected values for job = B (column-major)', function test( t ) {
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var expectedScale;
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var expectedOut;
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var expectedA;
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var scale;
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var info;
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var out;
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var A;
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A = new Float64Array([
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1.0, 0.0, 100.0,
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0.0, 5.0, 0.0,
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2.0, 0.0, 4.0
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]);
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out = new Float64Array( 2 );
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scale = new Float64Array( 3 );
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expectedOut = new Float64Array( [ 0.0, 1.0 ] );
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expectedScale = new Float64Array( [ 0.125, 1.0, 1.0 ] );
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expectedA = new Float64Array([
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1.0, 12.5, 0.0,
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16.0, 4.0, 0.0,
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0.0, 0.0, 5.0
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]);
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info = dgebal( 'B', 3, A, 1, 3, 0, out, 1, 0, scale, 1, 0 );
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t.strictEqual( info, 0, 'returns expected value' );
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t.deepEqual( out, expectedOut, 'returns expected value' );
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t.deepEqual( A, expectedA, 'returns expected value' );
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t.deepEqual( scale, expectedScale, 'returns expected value' );
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t.end();
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});

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