SWIFT-1600 Update compile script to ensure tests compile on minimum supported Swift version (#766)

Author: rchhaya

.evergreen/compile.sh

@@ -10,4 +10,4 @@ INSTALL_DIR="${PROJECT_DIRECTORY}/opt"
 # configure Swift
 . ${PROJECT_DIRECTORY}/.evergreen/configure-swift.sh
 
-swift build
+swift build --build-tests

Tests/MongoSwiftTests/MongoClientTests.swift

@@ -74,6 +74,8 @@ final class MongoClientTests: MongoSwiftTestCase {
         }
     }
 
+#if compiler(>=5.5.2) && canImport(_Concurrency)
+    @available(macOS 10.15, *)
     func testListDatabasesComment() async throws {
         try await self.withTestClient { client in
             // comment only supported here for 4.4+
@@ -101,6 +103,7 @@ final class MongoClientTests: MongoSwiftTestCase {
             expect(receivedEvents[1].command["comment"]).to(beNil())
         }
     }
+#endif
 
     func testClientIdGeneration() throws {
         let ids = try (0...2).map { _ in

Tests/MongoSwiftTests/MongoCollection+IndexTests.swift

@@ -1,8 +1,10 @@
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 import Foundation
 import MongoSwift
 import Nimble
 import TestsCommon
 
+@available(macOS 10.15, *)
 final class MongoCollection_IndexTests: MongoSwiftTestCase {
     func testCreateListDropIndexesComment() async throws {
         try await self.withTestClient { client in
@@ -66,3 +68,4 @@ final class MongoCollection_IndexTests: MongoSwiftTestCase {
         }
     }
 }
+#endif

Tests/MongoSwiftTests/MongoConnectionStringTests.swift

@@ -598,28 +598,28 @@ final class ConnectionStringTests: MongoSwiftTestCase {
     func testIPv4AddressParsing() throws {
         // valid IPv4
         let connString1 = try MongoConnectionString(string: "mongodb://1.2.3.4")
-        guard let host = connString1.hosts.first else {
+        guard let host1 = connString1.hosts.first else {
             XCTFail("connection string should contain one host")
             return
         }
-        expect(host.host).to(equal("1.2.3.4"))
-        expect(host.type).to(equal(.ipv4))
+        expect(host1.host).to(equal("1.2.3.4"))
+        expect(host1.type).to(equal(.ipv4))
         // invalid IPv4 should fall back to hostname (only three numbers)
         let connString2 = try MongoConnectionString(string: "mongodb://1.2.3")
-        guard let host = connString2.hosts.first else {
+        guard let host2 = connString2.hosts.first else {
             XCTFail("connection string should contain one host")
             return
         }
-        expect(host.host).to(equal("1.2.3"))
-        expect(host.type).to(equal(.hostname))
+        expect(host2.host).to(equal("1.2.3"))
+        expect(host2.type).to(equal(.hostname))
         // invalid IPv4 should fall back to hostname (numbers out of bounds)
         let connString3 = try MongoConnectionString(string: "mongodb://256.1.2.3")
-        guard let host = connString3.hosts.first else {
+        guard let host3 = connString3.hosts.first else {
             XCTFail("connection string should contain one host")
             return
         }
-        expect(host.host).to(equal("256.1.2.3"))
-        expect(host.type).to(equal(.hostname))
+        expect(host3.host).to(equal("256.1.2.3"))
+        expect(host3.type).to(equal(.hostname))
     }
 
     func testAuthSourceInDescription() throws {

Tests/MongoSwiftTests/MongoDatabaseTests.swift

@@ -1,8 +1,10 @@
+#if compiler(>=5.5.2) && canImport(_Concurrency)
 import Foundation
 import MongoSwift
 import Nimble
 import TestsCommon
 
+@available(macOS 10.15, *)
 final class MongoDatabaseTests: MongoSwiftTestCase {
     func testListCollectionsComment() async throws {
         try await self.withTestClient { client in
@@ -39,3 +41,4 @@ final class MongoDatabaseTests: MongoSwiftTestCase {
         }
     }
 }
+#endif