Add support for testing whether a value is a constant-cased string

lib/node_modules/@stdlib/assert/is-constantcase/README.md

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+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2022 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.
+
+-->
+
+# isConstantcase
+
+> Test if a value is a constantcase string.
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var isConstantcase = require( '@stdlib/assert/is-constantcase' );
+```
+
+#### isConstantcase( value )
+
+Tests if a `value` is a constantcase `string`.
+
+```javascript
+var bool = isConstantcase( 'BEEP_BOOP' );
+// returns true
+
+bool = isConstantcase( 'BEEP and BOOP' );
+// returns false
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   The function validates that a `value` is a `string`. For all other types, the function returns `false`.
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var isConstantcase = require( '@stdlib/assert/is-constantcase' );
+
+console.log( isConstantcase( 'BEEP_BOOP' ) );
+// => true
+
+console.log( isConstantcase( 'BEEP and BOOP' ) );
+// => false
+
+console.log( isConstantcase( 'BEEP_BOOP_BEEP' ) );
+// => true
+
+console.log( isConstantcase( 'b' ) );
+// => false
+
+console.log( isConstantcase( 'B' ) );
+// => true
+
+console.log( isConstantcase( '!' ) );
+// => false
+
+console.log( isConstantcase( 'beep boop' ) );
+// => false
+
+```
+
+</section>
+
+<!-- /.examples -->
+
+* * *
+
+<section class="cli">
+
+## CLI
+
+<section class="usage">
+
+### Usage
+
+```text
+Usage: is-constantcase [options] [<string>]
+
+Options:
+
+  -h,    --help                Print this message.
+  -V,    --version             Print the package version.
+         --split sep           Delimiter for stdin data. Default: '/\\r?\\n/'.
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- CLI usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+### Notes
+
+-   If the split separator is a [regular expression][mdn-regexp], ensure that the `split` option is either properly escaped or enclosed in quotes.
+
+    ```bash
+    # Not escaped...
+    $ echo -n $'beEp booP\nFOO' | is-constantcase --split /\r?\n/
+    # Escaped...
+    $ echo -n $'beEp booP\nFOO' | is-constantcase --split /\\r?\\n/
+    ```
+
+-   The implementation ignores trailing delimiters.
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+### Examples
+
+```bash
+$ is-constantcase beepboop
+true
+```
+
+To use as a [standard stream][standard-streams],
+
+```bash
+$ echo -n 'beep Boop' | is-constantcase
+false
+```
+
+By default, when used as a [standard stream][standard-streams], the implementation assumes newline-delimited data. To specify an alternative delimiter, set the `split` option.
+
+```bash
+$ echo -n 'beepBoop\tBEEP_BOOP' | is-constantcase --split '\t'
+false
+true
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.cli -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+* * *
+
+## See Also
+
+-   <span class="package-name">[`@stdlib/assert/is-string`][@stdlib/assert/is-string]</span><span class="delimiter">: </span><span class="description">test if a value is a string.</span>
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
+
+[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
+
+<!-- <related-links> -->
+
+[@stdlib/assert/is-string]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/assert/is-string
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->

lib/node_modules/@stdlib/assert/is-constantcase/benchmark/benchmark.js

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+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2022 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 bench = require( '@stdlib/bench' );
+var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
+var pkg = require( './../package.json' ).name;
+var isConstantcase = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var values;
+	var bool;
+	var i;
+
+	values = [
+		'',
+		'BEEP_BOOP',
+		'beep_boop',
+		'BEEP-BOOP',
+		'beep boop',
+		'beep',
+		null
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		bool = isConstantcase( values[ i % values.length ] );
+		if ( typeof bool !== 'boolean' ) {
+			b.fail( 'should return a boolean' );
+		}
+	}
+	b.toc();
+	if ( !isBoolean( bool ) ) {
+		b.fail( 'should return a boolean' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/assert/is-constantcase/bin/cli

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+#!/usr/bin/env node
+
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2022 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 resolve = require( 'path' ).resolve;
+var readFileSync = require( '@stdlib/fs/read-file' ).sync;
+var CLI = require( '@stdlib/cli/ctor' );
+var stdin = require( '@stdlib/process/read-stdin' );
+var stdinStream = require( '@stdlib/streams/node/stdin' );
+var RE_EOL = require( '@stdlib/regexp/eol' ).REGEXP;
+var isRegExpString = require( '@stdlib/assert/is-regexp-string' );
+var reFromString = require( '@stdlib/utils/regexp-from-string' );
+var isConstantcase = require( './../lib' );
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+* @returns {void}
+*/
+function main() {
+	var split;
+	var flags;
+	var args;
+	var cli;
+
+	// Create a command-line interface:
+	cli = new CLI({
+		'pkg': require( './../package.json' ),
+		'options': require( './../etc/cli_opts.json' ),
+		'help': readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
+			'encoding': 'utf8'
+		})
+	});
+
+	// Get any provided command-line options:
+	flags = cli.flags();
+	if ( flags.help || flags.version ) {
+		return;
+	}
+
+	// Get any provided command-line arguments:
+	args = cli.args();
+
+	// Check if we are receiving data from `stdin`...
+	if ( !stdinStream.isTTY ) {
+		if ( flags.split ) {
+			if ( !isRegExpString( flags.split ) ) {
+				flags.split = '/'+flags.split+'/';
+			}
+			split = reFromString( flags.split );
+		} else {
+			split = RE_EOL;
+		}
+		return stdin( onRead );
+	}
+	console.log( isConstantcase( args[ 0 ] ) ); // eslint-disable-line no-console
+
+	/**
+	* Callback invoked upon reading from `stdin`.
+	*
+	* @private
+	* @param {(Error|null)} error - error object
+	* @param {(string|Buffer)} data - data
+	* @returns {void}
+	*/
+	function onRead( error, data ) {
+		var lines;
+		var i;
+		if ( error ) {
+			return cli.error( error );
+		}
+		lines = data.toString().split( split );
+
+		// Remove any trailing separators (e.g., trailing newline)...
+		if ( lines[ lines.length-1 ] === '' ) {
+			lines.pop();
+		}
+		for ( i = 0; i < lines.length; i++ ) {
+			console.log( isConstantcase( lines[ i ] ) ); // eslint-disable-line no-console
+		}
+	}
+}
+
+main();

lib/node_modules/@stdlib/assert/is-constantcase/docs/repl.txt

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+
+{{alias}}( value )
+    Tests if a value is a constantcase string.
+
+    Parameters
+    ----------
+    value: any
+        Value to test.
+
+    Returns
+    -------
+    bool: boolean
+        Boolean indicating whether value is a constantcase string.
+
+    Examples
+    --------
+    > var bool = {{alias}}( 'BEEP_BOOP' )
+    true
+    > bool = {{alias}}( 'BEEP and BOOP' )
+    false
+
+    See Also
+    --------