061a086641
The actual change is in src/mongo/shell/collection.js with the remaining changes
to adjust tests to the new api.
The "ideal" arguments are now an array of pipeline ops and an optional object
with extra top-level options for the command (such as {explain: true}. For
backwards compatibility, we still support the varargs style where each argument
is a pipeline stage, but there is no way to specify extra parameters in this
mode.
77 lines
2.6 KiB
JavaScript
77 lines
2.6 KiB
JavaScript
// $cond returns the evaluated second argument if the first evaluates to true but the evaluated
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// third argument if the first evaluates to false.
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load('jstests/aggregation/extras/utils.js');
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t = db.jstests_aggregation_cond;
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t.drop();
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t.save( {} );
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function assertError( expectedErrorCode, condSpec ) {
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assertErrorCode(t, {$project: {a: {$cond: condSpec}}}, expectedErrorCode);
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}
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function assertResult( expectedResult, arg ) {
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assert.eq( expectedResult,
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t.aggregate( { $project:{ a:{ $cond:arg } } } ).toArray()[0].a );
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}
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// Wrong number of args.
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assertError( 16020, [] );
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assertError( 16020, [1] );
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assertError( 16020, [false] );
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assertError( 16020, [1,1] );
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assertError( 16020, [1,1,null,1] );
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assertError( 16020, [1,1,1,undefined] );
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// Bad object cases
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assertError( 17080, {"else":1, then:1} );
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assertError( 17081, {"if":1, "else":1} );
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assertError( 17082, {"if":1, then:1} );
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assertError( 17083, {asdf:1, then:1} );
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// Literal expressions.
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assertResult( 1, [true, 1, 2] );
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assertResult( 2, [false, 1, 2] );
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// Order independence for object case
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assertResult(1, {"if":true, "then":1, "else":2});
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assertResult(1, {"if":true, "else":2, "then":1});
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assertResult(1, {"then":1, "if":true, "else":2});
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assertResult(1, {"then":1, "else":2, "if":true});
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assertResult(1, {"else":2, "then":1, "if":true});
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assertResult(1, {"else":2, "if":true, "then":1});
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// Computed expressions.
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assertResult( 1, [{ $and:[] }, { $add:[ 1 ] }, { $add:[ 1, 1 ] }] );
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assertResult( 2, [{ $or:[] }, { $add:[ 1 ] }, { $add:[ 1, 1 ] }] );
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t.drop();
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t.save( { t:true, f:false, x:'foo', y:'bar' } );
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// Field path expressions.
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assertResult( 'foo', ['$t', '$x', '$y'] );
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assertResult( 'bar', ['$f', '$x', '$y'] );
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t.drop();
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t.save( {} );
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// Coerce to bool.
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assertResult( 'a', [1, 'a', 'b'] );
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assertResult( 'a', ['', 'a', 'b'] );
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assertResult( 'b', [0, 'a', 'b'] );
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// Nested.
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t.drop();
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t.save( { noonSense:'am', mealCombined:'no' } );
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t.save( { noonSense:'am', mealCombined:'yes' } );
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t.save( { noonSense:'pm', mealCombined:'yes' } );
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t.save( { noonSense:'pm', mealCombined:'no' } );
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assert.eq( [ 'breakfast', 'brunch', 'linner', 'dinner' ],
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t.aggregate( { $project:{ a:{ $cond:[ { $eq:[ '$noonSense', 'am' ] },
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{ $cond:[ { $eq:[ '$mealCombined', 'yes' ] },
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'brunch', 'breakfast' ] },
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{ $cond:[ { $eq:[ '$mealCombined', 'yes' ] },
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'linner', 'dinner' ] } ] } } } )
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.map( function( x ) { return x.a; } ) );
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