RUST-1709 Update changestream split test version bounds (#930)

Author: abr-egn

src/test/change_stream.rs

@@ -718,7 +718,9 @@ async fn split_large_event() -> Result<()> {
     let _guard = LOCK.run_concurrently().await;
 
     let client = Client::test_builder().build().await;
-    if !client.server_version_gte(7, 0) {
+    if !(client.server_version_matches(">= 6.0.9, < 6.1")
+        || client.server_version_matches(">= 7.0"))
+    {
         log_uncaptured(format!(
             "skipping change stream test on unsupported version {:?}",
             client.server_version

src/test/util.rs

@@ -326,16 +326,21 @@ impl TestClient {
 
     pub(crate) fn supports_fail_command(&self) -> bool {
         let version = if self.is_sharded() {
-            VersionReq::parse(">= 4.1.5").unwrap()
+            ">= 4.1.5"
         } else {
-            VersionReq::parse(">= 4.0").unwrap()
+            ">= 4.0"
         };
-        version.matches(&self.server_version)
+        self.server_version_matches(version)
+    }
+
+    pub(crate) fn server_version_matches(&self, req: &str) -> bool {
+        VersionReq::parse(req)
+            .unwrap()
+            .matches(&self.server_version)
     }
 
     pub(crate) fn supports_block_connection(&self) -> bool {
-        let version = VersionReq::parse(">= 4.2.9").unwrap();
-        version.matches(&self.server_version)
+        self.server_version_matches(">= 4.2.9")
     }
 
     /// Whether the deployment supports failing the initial handshake