test: add tests for Autosize constructor and properties

lib/node_modules/@stdlib/plot/vega/autosize/ctor/test/test.contains.js

@@ -0,0 +1,165 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var Autosize = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof Autosize, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'attached to the prototype of the main export is a `contains` property for determining how a size calculation should be performed', function test( t ) {
+	t.strictEqual( hasOwnProp( Autosize.prototype, 'contains' ), true, 'has property' );
+	t.end();
+});
+
+tape( 'the constructor throws an error if provided an invalid `contains` option', function test( t ) {
+	var values;
+	var i;
+
+	values = [
+		'beep',
+		'boop',
+		'invalid',
+		'CONTENT',
+		'PADDING',
+		5,
+		NaN,
+		null,
+		void 0,
+		true,
+		false,
+		[],
+		{},
+		function noop() {}
+	];
+	for ( i = 0; i < values.length; i++ ) {
+		t.throws( badValue( values[ i ] ), Error, 'throws an error when provided ' + values[ i ] );
+	}
+	t.end();
+
+	function badValue( value ) {
+		return function badValue() {
+			var autosize = new Autosize({ // eslint-disable-line no-unused-vars
+				'contains': value
+			});
+		};
+	}
+});
+
+tape( 'the constructor returns an instance having a `contains` property which throws an error if set to an invalid value', function test( t ) {
+	var values;
+	var i;
+
+	values = [
+		'beep',
+		'boop',
+		'invalid',
+		'CONTENT',
+		'PADDING',
+		5,
+		NaN,
+		null,
+		void 0,
+		true,
+		false,
+		[],
+		{},
+		function noop() {}
+	];
+	for ( i = 0; i < values.length; i++ ) {
+		t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+	}
+	t.end();
+
+	function badValue( value ) {
+		return function badValue() {
+			var autosize = new Autosize();
+			autosize.contains = value;
+		};
+	}
+});
+
+tape( 'the constructor returns an instance having a `contains` property which returns the method for determining how a size calculation should be performed', function test( t ) {
+	var autosize;
+
+	autosize = new Autosize();
+	t.strictEqual( autosize.contains, 'content', 'returns expected value' );
+
+	autosize = new Autosize({
+		'contains': 'padding'
+	});
+	t.strictEqual( autosize.contains, 'padding', 'returns expected value' );
+
+	autosize = new Autosize({
+		'contains': 'content'
+	});
+	t.strictEqual( autosize.contains, 'content', 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the constructor returns an instance having a `contains` property which can be set to a valid method', function test( t ) {
+	var autosize;
+
+	autosize = new Autosize();
+
+	autosize.contains = 'padding';
+	t.strictEqual( autosize.contains, 'padding', 'returns expected value' );
+
+	autosize.contains = 'content';
+	t.strictEqual( autosize.contains, 'content', 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the constructor returns an instance which emits an event when the `contains` property is set to a new value', function test( t ) {
+	var autosize;
+	var count;
+
+	autosize = new Autosize();
+	count = 0;
+
+	autosize.on( 'change', onChange );
+
+	autosize.contains = 'padding';
+	t.strictEqual( count, 1, 'emits event' );
+
+	autosize.contains = 'content';
+	t.strictEqual( count, 2, 'emits event' );
+
+	// Setting to the same value should not emit an event:
+	autosize.contains = 'content';
+	t.strictEqual( count, 2, 'does not emit event when value is unchanged' );
+
+	t.end();
+
+	function onChange() {
+		count += 1;
+	}
+});

lib/node_modules/@stdlib/plot/vega/autosize/ctor/test/test.js

@@ -0,0 +1,181 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var instanceOf = require( '@stdlib/assert/instance-of' );
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var Autosize = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof Autosize, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function is a constructor', function test( t ) {
+	var autosize = new Autosize();
+	t.strictEqual( instanceOf( autosize, Autosize ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the constructor does not require the `new` keyword', function test( t ) {
+	var autosize;
+	var ctor;
+
+	ctor = Autosize;
+	autosize = ctor();
+	t.strictEqual( instanceOf( autosize, Autosize ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the constructor does not require the `new` keyword (options)', function test( t ) {
+	var autosize;
+	var ctor;
+
+	ctor = Autosize;
+	autosize = ctor({
+		'type': 'fit'
+	});
+	t.strictEqual( instanceOf( autosize, Autosize ), true, 'returns expected value' );
+	t.strictEqual( autosize.type, 'fit', 'returns expected value' );
+	t.end();
+});
+
+tape( 'the constructor throws an error if provided an options argument which is not an object', function test( t ) {
+	var values;
+	var i;
+
+	values = [
+		'5',
+		5,
+		NaN,
+		null,
+		void 0,
+		true,
+		false,
+		[],
+		function noop() {}
+	];
+	for ( i = 0; i < values.length; i++ ) {
+		t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+	}
+	t.end();
+
+	function badValue( value ) {
+		return function badValue() {
+			var autosize = new Autosize( value ); // eslint-disable-line no-unused-vars
+		};
+	}
+});
+
+tape( 'the constructor has a read-only `name` property', function test( t ) {
+	t.strictEqual( Autosize.name, 'Autosize', 'returns expected value' );
+	t.end();
+});
+
+tape( 'the constructor returns an instance having a `toJSON` method for serializing an instance to JSON', function test( t ) {
+	var expected;
+	var autosize;
+	var json;
+
+	autosize = new Autosize();
+	json = autosize.toJSON();
+
+	expected = {
+		'contains': 'content',
+		'resize': false,
+		'type': 'pad'
+	};
+	t.deepEqual( json, expected, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the constructor returns an instance having a `toJSON` method for serializing an instance to JSON (options)', function test( t ) {
+	var expected;
+	var autosize;
+	var json;
+
+	autosize = new Autosize({
+		'type': 'fit',
+		'contains': 'padding',
+		'resize': true
+	});
+	json = autosize.toJSON();
+
+	expected = {
+		'contains': 'padding',
+		'resize': true,
+		'type': 'fit'
+	};
+	t.deepEqual( json, expected, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the `toJSON` method is implicitly invoked by `JSON.stringify`', function test( t ) {
+	var expected;
+	var autosize;
+
+	autosize = new Autosize({
+		'type': 'none',
+		'contains': 'content',
+		'resize': false
+	});
+
+	expected = {
+		'contains': 'content',
+		'resize': false,
+		'type': 'none'
+	};
+	t.strictEqual( JSON.stringify( autosize ), JSON.stringify( expected ), 'serializes as JSON when called by JSON.stringify()' );
+	t.end();
+});
+
+tape( 'the constructor returns an instance which inherits from EventEmitter', function test( t ) {
+	var autosize;
+
+	autosize = new Autosize();
+
+	t.strictEqual( typeof autosize.on, 'function', 'has `on` method' );
+	t.strictEqual( typeof autosize.emit, 'function', 'has `emit` method' );
+	t.strictEqual( typeof autosize.removeListener, 'function', 'has `removeListener` method' );
+
+	t.end();
+});
+
+tape( 'the constructor ignores unrecognized options', function test( t ) {
+	var autosize;
+
+	autosize = new Autosize({
+		'type': 'fit',
+		'beep': 'boop',
+		'foo': 'bar'
+	});
+
+	t.strictEqual( autosize.type, 'fit', 'returns expected value' );
+	t.strictEqual( hasOwnProp( autosize, 'beep' ), false, 'does not have property' );
+	t.strictEqual( hasOwnProp( autosize, 'foo' ), false, 'does not have property' );
+
+	t.end();
+});