testDiscovery() needs to enumerate only once because it's a sequence, not a collection, and may not be enumerable twice--cast to array for the bulk of the test

Author: grynspan

Tests/TestingTests/MiscellaneousTests.swift

@@ -629,14 +629,15 @@ struct MiscellaneousTests {
 
   @Test func testDiscovery() async {
     // Check the type of the test record sequence (it should be lazy.)
-    let allRecords = DiscoverableTestContent.allTestContentRecords()
+    let allRecordsSeq = DiscoverableTestContent.allTestContentRecords()
 #if SWT_FIXED_143080508
-    #expect(allRecords is any LazySequenceProtocol)
-    #expect(!(allRecords is [TestContentRecord<DiscoverableTestContent>]))
+    #expect(allRecordsSeq is any LazySequenceProtocol)
+    #expect(!(allRecordsSeq is [TestContentRecord<DiscoverableTestContent>]))
 #endif
 
     // It should have exactly one matching record (because we only emitted one.)
-    #expect(Array(allRecords).count == 1)
+    let allRecords = Array(allRecordsSeq)
+    #expect(allRecords.count == 1)
 
     // Can find a single test record
     #expect(allRecords.contains { record in