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test: add accessor array testcases
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‎lib/node_modules/@stdlib/stats/base/mean/test/test.main.js‎

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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 Float64Array = require( '@stdlib/array/float64' );
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var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
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var mean = require( './../lib/main.js' );
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@@ -56,6 +57,23 @@ tape( 'the function calculates the arithmetic mean of a strided array', function
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t.end();
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});
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tape( 'the function calculates the arithmetic mean of a strided array (accessors)', function test( t ) {
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var x;
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var v;
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x = [ 1.0, -2.0, -4.0, 5.0, 0.0, 3.0 ];
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v = mean( x.length, toAccessorArray( x ), 1 );
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t.strictEqual( v, 0.5, 'returns expected value' );
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x = [ -4.0 ];
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v = mean( x.length, toAccessorArray( x ), 1 );
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t.strictEqual( v, -4.0, 'returns expected value' );
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t.end();
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});
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tape( 'if provided an `N` parameter less than or equal to `0`, the function returns `NaN`', function test( t ) {
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var x;
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var v;
@@ -71,6 +89,21 @@ tape( 'if provided an `N` parameter less than or equal to `0`, the function retu
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t.end();
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});
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tape( 'if provided an `N` parameter less than or equal to `0`, the function returns `NaN` (accessors)', function test( t ) {
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var x;
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var v;
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x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
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v = mean( 0, toAccessorArray( x ), 1 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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v = mean( -1, toAccessorArray( x ), 1 );
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t.strictEqual( isnan( v ), true, 'returns expected value' );
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t.end();
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});
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tape( 'if provided an `N` parameter equal to `1`, the function returns the first element', function test( t ) {
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var x;
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var v;
@@ -83,6 +116,18 @@ tape( 'if provided an `N` parameter equal to `1`, the function returns the first
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t.end();
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});
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tape( 'if provided an `N` parameter equal to `1`, the function returns the first element (accessors)', function test( t ) {
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var x;
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var v;
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x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
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v = mean( 1, toAccessorArray( x ), 1 );
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t.strictEqual( v, 1.0, 'returns expected value' );
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t.end();
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});
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86131
tape( 'the function supports a `stride` parameter', function test( t ) {
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var x;
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var v;
@@ -104,6 +149,26 @@ tape( 'the function supports a `stride` parameter', function test( t ) {
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t.end();
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});
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tape( 'the function supports a `stride` parameter (accessors)', function test( t ) {
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var x;
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var v;
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x = [
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1.0, // 0
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2.0,
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2.0, // 1
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-7.0,
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-2.0, // 2
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3.0,
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4.0, // 3
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2.0
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];
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v = mean( 4, toAccessorArray( x ), 2 );
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t.strictEqual( v, 1.25, 'returns expected value' );
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t.end();
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});
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107172
tape( 'the function supports a negative `stride` parameter', function test( t ) {
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var x;
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var v;
@@ -125,6 +190,27 @@ tape( 'the function supports a negative `stride` parameter', function test( t )
125190
t.end();
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});
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193+
tape( 'the function supports a negative `stride` parameter (accessors)', function test( t ) {
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var x;
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var v;
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x = [
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1.0, // 3
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2.0,
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2.0, // 2
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-7.0,
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-2.0, // 1
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3.0,
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4.0, // 0
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2.0
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];
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v = mean( 4, toAccessorArray( x ), -2 );
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t.strictEqual( v, 1.25, 'returns expected value' );
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t.end();
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});
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128214
tape( 'if provided a `stride` parameter equal to `0`, the function returns the first element', function test( t ) {
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var x;
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var v;
@@ -137,6 +223,18 @@ tape( 'if provided a `stride` parameter equal to `0`, the function returns the f
137223
t.end();
138224
});
139225

226+
tape( 'if provided a `stride` parameter equal to `0`, the function returns the first element (accessors)', function test( t ) {
227+
var x;
228+
var v;
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230+
x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
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v = mean( x.length, toAccessorArray( x ), 0 );
233+
t.strictEqual( v, 1.0, 'returns expected value' );
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t.end();
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});
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140238
tape( 'the function supports view offsets', function test( t ) {
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var x0;
142240
var x1;
@@ -161,3 +259,28 @@ tape( 'the function supports view offsets', function test( t ) {
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162260
t.end();
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});
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tape( 'the function supports view offsets (accessors)', function test( t ) {
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var x0;
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var x1;
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var v;
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x0 = new Float64Array([
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2.0,
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1.0, // 0
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2.0,
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-2.0, // 1
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-2.0,
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2.0, // 2
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3.0,
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4.0, // 3
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6.0
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]);
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x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
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v = mean( 4, toAccessorArray( x1 ), 2 );
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t.strictEqual( v, 1.25, 'returns expected value' );
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t.end();
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});

‎lib/node_modules/@stdlib/stats/base/mean/test/test.ndarray.js‎

Lines changed: 120 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -22,6 +22,7 @@
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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 toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
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var mean = require( './../lib/ndarray.js' );
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@@ -55,6 +56,23 @@ tape( 'the function calculates the arithmetic mean of a strided array', function
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t.end();
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});
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tape( 'the function calculates the arithmetic mean of a strided array (accessors)', function test( t ) {
60+
var x;
61+
var v;
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x = [ 1.0, -2.0, -4.0, 5.0, 0.0, 3.0 ];
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v = mean( x.length, toAccessorArray( x ), 1, 0 );
66+
t.strictEqual( v, 0.5, 'returns expected value' );
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68+
x = [ -4.0 ];
69+
70+
v = mean( x.length, toAccessorArray( x ), 1, 0 );
71+
t.strictEqual( v, -4.0, 'returns expected value' );
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73+
t.end();
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});
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5876
tape( 'if provided an `N` parameter less than or equal to `0`, the function returns `NaN`', function test( t ) {
5977
var x;
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var v;
@@ -70,6 +88,21 @@ tape( 'if provided an `N` parameter less than or equal to `0`, the function retu
7088
t.end();
7189
});
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91+
tape( 'if provided an `N` parameter less than or equal to `0`, the function returns `NaN` (accessors)', function test( t ) {
92+
var x;
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var v;
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95+
x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
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v = mean( 0, toAccessorArray( x ), 1, 0 );
98+
t.strictEqual( isnan( v ), true, 'returns expected value' );
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100+
v = mean( -1, toAccessorArray( x ), 1, 0 );
101+
t.strictEqual( isnan( v ), true, 'returns expected value' );
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103+
t.end();
104+
});
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73106
tape( 'if provided an `N` parameter equal to `1`, the function returns the first indexed element', function test( t ) {
74107
var x;
75108
var v;
@@ -82,6 +115,18 @@ tape( 'if provided an `N` parameter equal to `1`, the function returns the first
82115
t.end();
83116
});
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118+
tape( 'if provided an `N` parameter equal to `1`, the function returns the first indexed element (accessors)', function test( t ) {
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var x;
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var v;
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122+
x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
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124+
v = mean( 1, toAccessorArray( x ), 1, 0 );
125+
t.strictEqual( v, 1.0, 'returns expected value' );
126+
127+
t.end();
128+
});
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85130
tape( 'the function supports a `stride` parameter', function test( t ) {
86131
var x;
87132
var v;
@@ -103,6 +148,27 @@ tape( 'the function supports a `stride` parameter', function test( t ) {
103148
t.end();
104149
});
105150

151+
tape( 'the function supports a `stride` parameter (accessors)', function test( t ) {
152+
var x;
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var v;
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155+
x = [
156+
1.0, // 0
157+
2.0,
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2.0, // 1
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-7.0,
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-2.0, // 2
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3.0,
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4.0, // 3
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2.0
164+
];
165+
166+
v = mean( 4, toAccessorArray( x ), 2, 0 );
167+
168+
t.strictEqual( v, 1.25, 'returns expected value' );
169+
t.end();
170+
});
171+
106172
tape( 'the function supports a negative `stride` parameter', function test( t ) {
107173
var x;
108174
var v;
@@ -124,6 +190,27 @@ tape( 'the function supports a negative `stride` parameter', function test( t )
124190
t.end();
125191
});
126192

193+
tape( 'the function supports a negative `stride` parameter (accessors)', function test( t ) {
194+
var x;
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var v;
196+
197+
x = [
198+
1.0, // 3
199+
2.0,
200+
2.0, // 2
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-7.0,
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-2.0, // 1
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3.0,
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4.0, // 0
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2.0
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];
207+
208+
v = mean( 4, toAccessorArray( x ), -2, 6 );
209+
210+
t.strictEqual( v, 1.25, 'returns expected value' );
211+
t.end();
212+
});
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127214
tape( 'if provided a `stride` parameter equal to `0`, the function returns the first indexed element', function test( t ) {
128215
var x;
129216
var v;
@@ -136,6 +223,18 @@ tape( 'if provided a `stride` parameter equal to `0`, the function returns the f
136223
t.end();
137224
});
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226+
tape( 'if provided a `stride` parameter equal to `0`, the function returns the first indexed element (accessors)', function test( t ) {
227+
var x;
228+
var v;
229+
230+
x = [ 1.0, -2.0, -4.0, 5.0, 3.0 ];
231+
232+
v = mean( x.length, toAccessorArray( x ), 0, 0 );
233+
t.strictEqual( v, 1.0, 'returns expected value' );
234+
235+
t.end();
236+
});
237+
139238
tape( 'the function supports an `offset` parameter', function test( t ) {
140239
var x;
141240
var v;
@@ -156,3 +255,24 @@ tape( 'the function supports an `offset` parameter', function test( t ) {
156255

157256
t.end();
158257
});
258+
259+
tape( 'the function supports an `offset` parameter (accessors)', function test( t ) {
260+
var x;
261+
var v;
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263+
x = [
264+
2.0,
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1.0, // 0
266+
2.0,
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-2.0, // 1
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-2.0,
269+
2.0, // 2
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3.0,
271+
4.0 // 3
272+
];
273+
274+
v = mean( 4, toAccessorArray( x ), 2, 1 );
275+
t.strictEqual( v, 1.25, 'returns expected value' );
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t.end();
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});

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