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test: add tests for Title constructor and properties
PR-URL: #10031 (review) Co-authored-by: Athan Reines <kgryte@gmail.com> Reviewed-by: Athan Reines <kgryte@gmail.com>
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31 files changed

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-2
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‎lib/node_modules/@stdlib/plot/vega/title/ctor/lib/main.js‎

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@@ -16,7 +16,7 @@
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* limitations under the License.
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*/
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/* eslint-disable no-restricted-syntax, no-invalid-this */
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/* eslint-disable no-restricted-syntax, no-invalid-this, stdlib/no-empty-lines-between-requires */
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'use strict';
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@@ -396,7 +396,7 @@ setReadWriteAccessor( Title.prototype, 'font', getFont, setFont );
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*
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* @name fontSize
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* @memberof Title.prototype
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* @type {(string|void)}
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* @type {(number|void)}
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*
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* @example
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* var title = new Title({

‎lib/node_modules/@stdlib/plot/vega/title/ctor/test/test.align.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2026 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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'use strict';
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// MODULES //
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var tape = require( 'tape' );
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var hasOwnProp = require( '@stdlib/assert/has-own-property' );
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var isUndefined = require( '@stdlib/assert/is-undefined' );
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var hasProp = require( '@stdlib/assert/has-property' );
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var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
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var Title = require( './../lib' );
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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 Title, 'function', 'main export is a function' );
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t.end();
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});
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tape( 'the constructor returns an instance which has an `align` property', function test( t ) {
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var v = new Title();
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t.strictEqual( hasOwnProp( v, 'align' ), false, 'returns expected value' );
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t.strictEqual( hasProp( v, 'align' ), true, 'returns expected value' );
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t.strictEqual( isUndefined( v.align ), true, 'returns expected value' );
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v = new Title({
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'align': 'left'
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});
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t.strictEqual( isString( v.align ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the constructor returns an instance having an `align` property which throws an error if set to an invalid value', function test( t ) {
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var values;
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var i;
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values = [
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5,
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NaN,
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null,
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true,
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false,
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[],
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{},
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function noop() {}
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];
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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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var title = new Title();
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title.align = value;
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};
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}
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});
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tape( 'the constructor returns an instance having an `align` property', function test( t ) {
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var title = new Title();
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t.strictEqual( isUndefined( title.align ), true, 'returns expected value' );
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title = new Title({
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'align': 'left'
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});
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t.strictEqual( title.align, 'left', 'returns expected value' );
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title = new Title({
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'align': 'top'
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});
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t.strictEqual( title.align, 'top', 'returns expected value' );
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t.end();
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});
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tape( 'the constructor returns an instance having an `align` property which can be set to a valid value', function test( t ) {
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var title = new Title();
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title.align = 'left';
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t.strictEqual( title.align, 'left', 'returns expected value' );
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title.align = 'top';
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t.strictEqual( title.align, 'top', 'returns expected value' );
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t.end();
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});
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tape( 'the constructor returns an instance which emits an event when the `align` property is set to a new value', function test( t ) {
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var title;
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var count;
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title = new Title();
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count = 0;
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title.on( 'change', onChange );
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title.align = 'left';
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t.strictEqual( count, 1, 'returns expected value' );
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title.align = 'top';
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t.strictEqual( count, 2, 'returns expected value' );
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// Setting to the same value should not emit an event:
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title.align = 'top';
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t.strictEqual( count, 2, 'returns expected value' );
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t.end();
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function onChange() {
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count += 1;
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}
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});

‎lib/node_modules/@stdlib/plot/vega/title/ctor/test/test.anchor.js‎

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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2026 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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'use strict';
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// MODULES //
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var tape = require( 'tape' );
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var hasOwnProp = require( '@stdlib/assert/has-own-property' );
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var hasProp = require( '@stdlib/assert/has-property' );
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var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
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var Title = require( './../lib' );
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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 Title, 'function', 'main export is a function' );
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t.end();
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});
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tape( 'the constructor returns an instance which has an `anchor` property', function test( t ) {
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var v = new Title();
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t.strictEqual( hasOwnProp( v, 'anchor' ), false, 'returns expected value' );
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t.strictEqual( hasProp( v, 'anchor' ), true, 'returns expected value' );
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t.strictEqual( isString( v.anchor ), true, 'returns expected value' );
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t.end();
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});
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tape( 'the constructor returns an instance having an `anchor` property which throws an error if set to an invalid value', function test( t ) {
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var values;
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var i;
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values = [
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'beep',
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'boop',
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'START',
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5,
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NaN,
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null,
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true,
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false,
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[],
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{},
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function noop() {}
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];
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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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var title = new Title();
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title.anchor = value;
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};
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}
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});
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tape( 'the constructor returns an instance having an `anchor` property', function test( t ) {
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var title = new Title();
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t.strictEqual( title.anchor, 'middle', 'returns expected value' );
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title = new Title({
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'anchor': 'start'
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});
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t.strictEqual( title.anchor, 'start', 'returns expected value' );
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title = new Title({
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'anchor': 'end'
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});
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t.strictEqual( title.anchor, 'end', 'returns expected value' );
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t.end();
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});
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tape( 'the constructor returns an instance having an `anchor` property which can be set to a valid value', function test( t ) {
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var title = new Title();
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title.anchor = 'start';
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t.strictEqual( title.anchor, 'start', 'returns expected value' );
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title.anchor = 'end';
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t.strictEqual( title.anchor, 'end', 'returns expected value' );
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t.end();
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});
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tape( 'the constructor returns an instance which emits an event when the `anchor` property is set to a new value', function test( t ) {
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var title;
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var count;
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title = new Title();
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count = 0;
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title.on( 'change', onChange );
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title.anchor = 'start';
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t.strictEqual( count, 1, 'returns expected value' );
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title.anchor = 'end';
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t.strictEqual( count, 2, 'returns expected value' );
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// Setting to the same value should not emit an event:
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title.anchor = 'end';
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t.strictEqual( count, 2, 'returns expected value' );
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t.end();
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function onChange() {
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count += 1;
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}
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});

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