mungedb-aggregate/test/lib/pipeline/matcher/ModMatchExpression.js

"use strict";
var assert = require("assert"),
	ModMatchExpression = require("../../../../lib/pipeline/matcher/ModMatchExpression"),
	MatchDetails = require("../../../../lib/pipeline/matcher/MatchDetails");


module.exports = {
	"ModMatchExpression": {
		"should match a number": function (){
			var e = new ModMatchExpression();
			var s = e.init('',3,1);
			
			assert.strictEqual(s.code, 'OK');
			assert.ok( e.matches(1) );
			assert.ok( e.matches(4.0) );
			assert.ok( e.matches(68719476736) );
			assert.ok( ! e.matches(6) );
			assert.ok( ! e.matches(-2) ); 
		},
		"should fail init with a zero divisor":function() {
			var e = new ModMatchExpression();
			var s = e.init('', 0,  1);
			
			assert.strictEqual( s.code, 'BAD_VALUE' );
		},
		"should match more numbers":function() {
			var e = new ModMatchExpression();
			var s = e.init('a', 5,2);
			
			assert.strictEqual( s.code, 'OK' );
			assert.ok( e.matches({'a':7.0}) );	
			assert.ok( ! e.matches({'a':4}) );
		},
		"should match an array":function() {
			var e = new ModMatchExpression();
			var s = e.init('a',5,2);
			
			assert.strictEqual( s.code, 'OK' );
			assert.ok( e.matches({'a':[5,12]}) );
			assert.ok( ! e.matches({'a':[6,8]}) );
		},
		"should not match null":function() {
			var e = new ModMatchExpression();
			var s = e.init('a',5,2);

			assert.strictEqual(s.code, 'OK');
			assert.ok( ! e.matches({}) );
			assert.ok( ! e.matches({'a':null}) );
		},
		"should yield an elemMatchKey":function() {
			var e = new ModMatchExpression();
			var s = e.init('a', 5,2);
			var m = new MatchDetails();
			m.requestElemMatchKey();
			assert.strictEqual( s.code, 'OK' );

			assert.ok( ! e.matches({'a':4}, m) );
			assert.ok( ! m.hasElemMatchKey() );
			
			assert.ok( e.matches({'a':2}));
			assert.ok( ! m.hasElemMatchKey() );

			assert.ok( e.matches({'a':[1,2,5]}, m) );
			assert.ok( m.hasElemMatchKey() );
			assert.strictEqual('1', m.elemMatchKey() );
		},
		"should handle equivalence":function() {
			var e = new ModMatchExpression();
			var s = e.init('a',1,2);
			var b = new ModMatchExpression();
			var c = new ModMatchExpression();
			var d = new ModMatchExpression();
			assert.strictEqual( s.code, 'OK' );

			s = b.init('a',2,2);
			assert.strictEqual(s.code, 'OK' );
			
			s = c.init('a',1,1);
			assert.strictEqual(s.code, 'OK' );

			s = d.init('b',1,2);
			assert.strictEqual(s.code, 'OK' );

			assert.ok( e.equivalent(e) );
			assert.ok( ! e.equivalent(b) );
			assert.ok( ! e.equivalent(c) );
			assert.ok( ! e.equivalent(d) );		
		}


	}
};

if (!module.parent)(new(require("mocha"))()).ui("exports").reporter("spec").addFile(__filename).run(process.exit);