test: add ctx cases

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---

Author: headlessNode

lib/node_modules/@stdlib/ndarray/base/every-by/test/test.1d.js

@@ -82,3 +82,121 @@ tape( 'the function tests whether every element in a 1-dimensional ndarray passe
 		return ( real( v ) !== 0.0 && imag( v ) !== 0.0 );
 	}
 });
+
+tape( 'the function supports specifying the callback execution context', function test( t ) {
+	var expected;
+	var indices;
+	var values;
+	var arrays;
+	var actual;
+	var ctx;
+	var x;
+
+	x = new ndarray( 'float64', ones( 8, 'float64'), [ 4 ], [ 2 ], 0, 'row-major' );
+
+	indices = [];
+	values = [];
+	arrays = [];
+
+	ctx = {
+		'count': 0
+	};
+	actual = everyBy( [ x ], clbk, ctx );
+
+	t.strictEqual( actual, true, 'returns expected value' );
+	t.strictEqual( ctx.count, 4, 'returns expected value' );
+
+	expected = [
+		1.0,
+		1.0,
+		1.0,
+		1.0
+	];
+	t.deepEqual( values, expected, 'returns expected value' );
+
+	expected = [
+		[ 0 ],
+		[ 1 ],
+		[ 2 ],
+		[ 3 ]
+	];
+	t.deepEqual( indices, expected, 'returns expected value' );
+
+	expected = [
+		x,
+		x,
+		x,
+		x
+	];
+	t.deepEqual( arrays, expected, 'returns expected value' );
+
+	t.end();
+
+	function clbk( v, idx, arr ) {
+		this.count += 1; // eslint-disable-line no-invalid-this
+		values.push( v );
+		indices.push( idx );
+		arrays.push( arr );
+		return v !== 0.0;
+	}
+});
+
+tape( 'the function supports specifying the callback execution context (accessors)', function test( t ) {
+	var expected;
+	var indices;
+	var values;
+	var arrays;
+	var actual;
+	var xbuf;
+	var ctx;
+	var x;
+
+	xbuf = ones( 6*2, 'float64' );
+	x = ndarray( 'complex128', new Complex128Array( xbuf ), [ 4 ], [ 1 ], 1, 'row-major' );
+
+	indices = [];
+	values = [];
+	arrays = [];
+
+	ctx = {
+		'count': 0
+	};
+	actual = everyBy( [ x ], clbk, ctx );
+
+	t.strictEqual( actual, true, 'returns expected value' );
+	t.strictEqual( ctx.count, 4, 'returns expected value' );
+
+	expected = [
+		[ 1.0, 1.0 ],
+		[ 1.0, 1.0 ],
+		[ 1.0, 1.0 ],
+		[ 1.0, 1.0 ]
+	];
+	t.deepEqual( values, expected, 'returns expected value' );
+
+	expected = [
+		[ 0 ],
+		[ 1 ],
+		[ 2 ],
+		[ 3 ]
+	];
+	t.deepEqual( indices, expected, 'returns expected value' );
+
+	expected = [
+		x,
+		x,
+		x,
+		x
+	];
+	t.deepEqual( arrays, expected, 'returns expected value' );
+
+	t.end();
+
+	function clbk( v, idx, arr ) {
+		this.count += 1; // eslint-disable-line no-invalid-this
+		values.push( [ real( v ), imag( v ) ] );
+		indices.push( idx );
+		arrays.push( arr );
+		return ( real( v ) !== 0.0 && imag( v ) !== 0.0 );
+	}
+});