check if results are expected to be empty

test example

fixes

fix

Author: natemann

Sources/StructuredQueriesTestSupport/AssertQuery.swift

@@ -97,6 +97,22 @@ public func assertQuery<each V: QueryRepresentable, S: Statement<(repeat each V)
         line: line,
         column: column
       )
+    } else if results != nil {
+      assertInlineSnapshot(
+        of: table,
+        as: .lines,
+        message: "Results expected to be empty",
+        syntaxDescriptor: InlineSnapshotSyntaxDescriptor(
+          trailingClosureLabel: "results",
+          trailingClosureOffset: snapshotTrailingClosureOffset + 1
+        ),
+        matches: results,
+        fileID: fileID,
+        file: filePath,
+        function: function,
+        line: line,
+        column: column
+      )
     }
   } catch {
     assertInlineSnapshot(

Tests/StructuredQueriesTests/WhereTests.swift

@@ -40,6 +40,60 @@ extension SnapshotTests {
       }
     }
 
+    @Test func emptyResults() {
+      withKnownIssue("This assert should fail") {
+        assertQuery(
+          Reminder.where(\.isCompleted).and(Reminder.where(\.isFlagged))
+        ) {
+        """
+        SELECT "reminders"."id", "reminders"."assignedUserID", "reminders"."dueDate", "reminders"."isCompleted", "reminders"."isFlagged", "reminders"."notes", "reminders"."priority", "reminders"."remindersListID", "reminders"."title"
+        FROM "reminders"
+        WHERE ("reminders"."isCompleted") AND ("reminders"."isFlagged")
+        """
+        } results: {
+        """
+        ┌────────────────────────────────────────────┐
+        │ Reminder(                                  │
+        │   id: 4,                                   │
+        │   assignedUserID: nil,                     │
+        │   dueDate: Date(2000-06-25T00:00:00.000Z), │
+        │   isCompleted: true,                       │
+        │   isFlagged: false,                        │
+        │   notes: "",                               │
+        │   priority: nil,                           │
+        │   remindersListID: 1,                      │
+        │   title: "Take a walk"                     │
+        │ )                                          │
+        ├────────────────────────────────────────────┤
+        │ Reminder(                                  │
+        │   id: 7,                                   │
+        │   assignedUserID: nil,                     │
+        │   dueDate: Date(2000-12-30T00:00:00.000Z), │
+        │   isCompleted: true,                       │
+        │   isFlagged: false,                        │
+        │   notes: "",                               │
+        │   priority: .low,                          │
+        │   remindersListID: 2,                      │
+        │   title: "Get laundry"                     │
+        │ )                                          │
+        ├────────────────────────────────────────────┤
+        │ Reminder(                                  │
+        │   id: 10,                                  │
+        │   assignedUserID: nil,                     │
+        │   dueDate: Date(2000-12-30T00:00:00.000Z), │
+        │   isCompleted: true,                       │
+        │   isFlagged: false,                        │
+        │   notes: "",                               │
+        │   priority: .medium,                       │
+        │   remindersListID: 3,                      │
+        │   title: "Send weekly emails"              │
+        │ )                                          │
+        └────────────────────────────────────────────┘
+        """
+        }
+      }
+    }
+
     @Test func or() {
       assertQuery(
         Reminder.where(\.isCompleted).or(Reminder.where(\.isFlagged))