PHPLIB-1384: Use default value in Query::exists() (mongodb#60)

* PHPLIB-1384: Use default value in Query::exists()

* Remove default value from exists() calls

Author: alcaeus

generator/config/query/exists.yaml

@@ -11,6 +11,7 @@ arguments:
         name: exists
         type:
             - bool
+        default: true
 tests:
     -
         name: 'Exists and Not Equal To'
@@ -29,3 +30,10 @@ tests:
                 $match:
                     qty:
                         $exists: true
+    -
+        name: 'Missing Field'
+        pipeline:
+            -
+                $match:
+                    qty:
+                        $exists: false

src/Builder/Query/ExistsOperator.php

@@ -23,7 +23,7 @@ public function testANDQueriesWithMultipleExpressionsSpecifyingTheSameField(): v
                         price: Query::ne(1.99),
                     ),
                     Query::query(
-                        price: Query::exists(true),
+                        price: Query::exists(),
                     ),
                 ),
             ),

src/Builder/Query/FactoryTrait.php

@@ -19,7 +19,7 @@ public function testExistsAndNotEqualTo(): void
         $pipeline = new Pipeline(
             Stage::match(
                 qty: [
-                    Query::exists(true),
+                    Query::exists(),
                     Query::nin([5, 15]),
                 ],
             ),
@@ -28,13 +28,22 @@ public function testExistsAndNotEqualTo(): void
         $this->assertSamePipeline(Pipelines::ExistsExistsAndNotEqualTo, $pipeline);
     }
 
+    public function testMissingField(): void
+    {
+        $pipeline = new Pipeline(
+            Stage::match(
+                qty: Query::exists(false),
+            ),
+        );
+
+        $this->assertSamePipeline(Pipelines::ExistsMissingField, $pipeline);
+    }
+
     public function testNullValues(): void
     {
         $pipeline = new Pipeline(
             Stage::match(
-                qty: [
-                    Query::exists(true),
-                ],
+                qty: Query::exists(),
             ),
         );
 

tests/Builder/Query/AndOperatorTest.php

@@ -23,7 +23,7 @@ public function testInactiveSessions(): void
             ),
             Stage::match(
                 active: false,
-                transaction: Query::exists(true),
+                transaction: Query::exists(),
             ),
         );
 

tests/Builder/Query/ExistsOperatorTest.php

@@ -40,7 +40,7 @@ public function testExample(): void
                 ),
                 categorizedByPrice: new Pipeline(
                     Stage::match(
-                        price: Query::exists(true),
+                        price: Query::exists(),
                     ),
                     Stage::bucket(
                         groupBy: Expression::numberFieldPath('price'),