Make sure DB is dropped after all tests

tests/test_column_family.rs

@@ -13,22 +13,24 @@
 // limitations under the License.
 //
 extern crate rocksdb;
+mod util;
 
 use rocksdb::{DB, MergeOperands, Options, ColumnFamilyDescriptor};
+use util::DBName;
 
 #[test]
 pub fn test_column_family() {
-    let path = "_rust_rocksdb_cftest";
+    let n = DBName::new("_rust_rocksdb_cftest");
 
     // should be able to create column families
     {
         let mut opts = Options::default();
         opts.create_if_missing(true);
         opts.set_merge_operator("test operator", test_provided_merge, None);
-        let mut db = DB::open(&opts, path).unwrap();
+        let mut db = DB::open(&opts, &n.name).unwrap();
         let opts = Options::default();
         match db.create_cf("cf1", &opts) {
-            Ok(_) => println!("cf1 created successfully"),
+            Ok(_db) => println!("cf1 created successfully"),
             Err(e) => {
                 panic!("could not create column family: {}", e);
             }
@@ -39,8 +41,8 @@ pub fn test_column_family() {
     {
         let mut opts = Options::default();
         opts.set_merge_operator("test operator", test_provided_merge, None);
-        match DB::open(&opts, path) {
+        match DB::open(&opts, &n.name) {
-            Ok(_) => {
+            Ok(_db) => {
                 panic!("should not have opened DB successfully without \
                         specifying column
             families")
@@ -57,8 +59,8 @@ pub fn test_column_family() {
     {
         let mut opts = Options::default();
         opts.set_merge_operator("test operator", test_provided_merge, None);
-        match DB::open_cf(&opts, path, &["cf1"]) {
+        match DB::open_cf(&opts, &n.name, &["cf1"]) {
-            Ok(_) => println!("successfully opened db with column family"),
+            Ok(_db) => println!("successfully opened db with column family"),
             Err(e) => panic!("failed to open db with column family: {}", e),
         }
     }
@@ -66,7 +68,7 @@ pub fn test_column_family() {
     // should be able to list a cf
     {
         let opts = Options::default();
-        let vec = DB::list_cf(&opts, path);
+        let vec = DB::list_cf(&opts, &n.name);
         match vec {
             Ok(vec) => assert_eq!(vec, vec!["default", "cf1"]),
             Err(e) => panic!("failed to drop column family: {}", e),
@@ -81,19 +83,17 @@ pub fn test_column_family() {
     }
     // should b able to drop a cf
     {
-        let mut db = DB::open_cf(&Options::default(), path, &["cf1"]).unwrap();
+        let mut db = DB::open_cf(&Options::default(), &n.name, &["cf1"]).unwrap();
         match db.drop_cf("cf1") {
             Ok(_) => println!("cf1 successfully dropped."),
             Err(e) => panic!("failed to drop column family: {}", e),
         }
     }
-
-    assert!(DB::destroy(&Options::default(), path).is_ok());
 }
 
 #[test]
 fn test_create_missing_column_family() {
-    let path = "_rust_rocksdb_missing_cftest";
+    let n = DBName::new("_rust_rocksdb_missing_cftest");
 
     // should be able to create new column families when opening a new database
     {
@@ -101,24 +101,22 @@ fn test_create_missing_column_family() {
         opts.create_if_missing(true);
         opts.create_missing_column_families(true);
 
-        match DB::open_cf(&opts, path, &["cf1"]) {
+        match DB::open_cf(&opts, &n.name, &["cf1"]) {
-            Ok(_) => println!("successfully created new column family"),
+            Ok(_db) => println!("successfully created new column family"),
             Err(e) => panic!("failed to create new column family: {}", e),
         }
     }
-
-    assert!(DB::destroy(&Options::default(), path).is_ok());
 }
 
 #[test]
 #[ignore]
 fn test_merge_operator() {
-    let path = "_rust_rocksdb_cftest_merge";
+    let n = DBName::new("_rust_rocksdb_cftest_merge");
     // TODO should be able to write, read, merge, batch, and iterate over a cf
     {
         let mut opts = Options::default();
         opts.set_merge_operator("test operator", test_provided_merge, None);
-        let db = match DB::open_cf(&opts, path, &["cf1"]) {
+        let db = match DB::open_cf(&opts, &n.name, &["cf1"]) {
             Ok(db) => {
                 println!("successfully opened db with column family");
                 db
@@ -180,7 +178,7 @@ fn test_provided_merge(_: &[u8],
 
 #[test]
 pub fn test_column_family_with_options() {
-    let path = "_rust_rocksdb_cf_with_optionstest";
+    let n = DBName::new("_rust_rocksdb_cf_with_optionstest");
     {
         let mut cfopts = Options::default();
         cfopts.set_max_write_buffer_number(16);
@@ -191,8 +189,8 @@ pub fn test_column_family_with_options() {
         opts.create_missing_column_families(true);
 
         let cfs = vec![cf_descriptor];
-        match DB::open_cf_descriptors(&opts, path, cfs) {
+        match DB::open_cf_descriptors(&opts, &n.name, cfs) {
-            Ok(_) => println!("created db with column family descriptors succesfully"),
+            Ok(_db) => println!("created db with column family descriptors succesfully"),
             Err(e) => {
                 panic!("could not create new database with column family descriptors: {}", e);
             }
@@ -207,13 +205,11 @@ pub fn test_column_family_with_options() {
         let opts = Options::default();
         let cfs = vec![cf_descriptor];
 
-        match DB::open_cf_descriptors(&opts, path, cfs) {
+        match DB::open_cf_descriptors(&opts, &n.name, cfs) {
-            Ok(_) => println!("succesfully re-opened database with column family descriptorrs"),
+            Ok(_db) => println!("succesfully re-opened database with column family descriptors"),
             Err(e) => {
                 panic!("unable to re-open database with column family descriptors: {}", e);
             }
         }
     }
-
-    assert!(DB::destroy(&Options::default(), path).is_ok());
 }

tests/test_iterator.rs

@@ -13,8 +13,10 @@
 // limitations under the License.
 //
 extern crate rocksdb;
+mod util;
 
 use rocksdb::{DB, Direction, IteratorMode, Options};
+use util::DBName;
 
 fn cba(input: &Box<[u8]>) -> Box<[u8]> {
     input.iter().cloned().collect::<Vec<_>>().into_boxed_slice()
@@ -22,7 +24,7 @@ fn cba(input: &Box<[u8]>) -> Box<[u8]> {
 
 #[test]
 pub fn test_iterator() {
-    let path = "_rust_rocksdb_iteratortest";
+    let n = DBName::new("_rust_rocksdb_iteratortest");
     {
         let k1: Box<[u8]> = b"k1".to_vec().into_boxed_slice();
         let k2: Box<[u8]> = b"k2".to_vec().into_boxed_slice();
@@ -32,7 +34,7 @@ pub fn test_iterator() {
         let v2: Box<[u8]> = b"v2222".to_vec().into_boxed_slice();
         let v3: Box<[u8]> = b"v3333".to_vec().into_boxed_slice();
         let v4: Box<[u8]> = b"v4444".to_vec().into_boxed_slice();
-        let db = DB::open_default(path).unwrap();
+        let db = DB::open_default(&n.name).unwrap();
         let p = db.put(&*k1, &*v1);
         assert!(p.is_ok());
         let p = db.put(&*k2, &*v2);
@@ -153,15 +155,13 @@ pub fn test_iterator() {
             assert!(!iterator1.valid());
         }
     }
-    let opts = Options::default();
-    assert!(DB::destroy(&opts, path).is_ok());
 }
 
 fn key(k: &[u8]) -> Box<[u8]> { k.to_vec().into_boxed_slice() }
 
 #[test]
 pub fn test_prefix_iterator() {
-    let path = "_rust_rocksdb_prefixiteratortest";
+    let n = DBName::new("_rust_rocksdb_prefixiteratortest");
     {
         let a1: Box<[u8]> = key(b"aaa1");
         let a2: Box<[u8]> = key(b"aaa2");
@@ -174,7 +174,7 @@ pub fn test_prefix_iterator() {
 		opts.create_if_missing(true);
         opts.set_prefix_extractor(prefix_extractor);
 
-        let db = DB::open(&opts, path).unwrap();
+        let db = DB::open(&opts, &n.name).unwrap();
 
         assert!(db.put(&*a1, &*a1).is_ok());
         assert!(db.put(&*a2, &*a2).is_ok());

tests/test_multithreaded.rs

@@ -13,18 +13,21 @@
 // limitations under the License.
 //
 extern crate rocksdb;
+mod util;
 
-use rocksdb::{DB, Options};
+use rocksdb::DB;
 use std::thread;
 use std::sync::Arc;
+use util::DBName;
+
 
 const N: usize = 100_000;
 
 #[test]
 pub fn test_multithreaded() {
-    let path = "_rust_rocksdb_multithreadtest";
+    let n = DBName::new("_rust_rocksdb_multithreadtest");
     {
-        let db = DB::open_default(path).unwrap();
+        let db = DB::open_default(&n.name).unwrap();
         let db = Arc::new(db);
 
         db.put(b"key", b"value1").unwrap();
@@ -63,5 +66,4 @@ pub fn test_multithreaded() {
         j2.join().unwrap();
         j3.join().unwrap();
     }
-    assert!(DB::destroy(&Options::default(), path).is_ok());
 }

tests/test_raw_iterator.rs

@@ -13,27 +13,16 @@
 // limitations under the License.
 //
 extern crate rocksdb;
+mod util;
 
 use rocksdb::DB;
-
+use util::DBName;
-
-fn setup_test_db(name: &str) -> DB {
-    use std::fs::remove_dir_all;
-
-    let path = "_rust_rocksdb_rawiteratortest_".to_string() + name;
-
-    match remove_dir_all(&path) {
-        Ok(_) => {}
-        Err(_) => {}  // Don't care if tis fails
-    }
-
-    DB::open_default(path).unwrap()
-}
-
 
 #[test]
 pub fn test_forwards_iteration() {
-    let db = setup_test_db("forwards_iteration");
+    let n = DBName::new("forwards_iteration");
+    {
+        let db = DB::open_default(&n.name).unwrap();
         db.put(b"k1", b"v1").unwrap();
         db.put(b"k2", b"v2").unwrap();
         db.put(b"k3", b"v3").unwrap();
@@ -59,12 +48,15 @@ pub fn test_forwards_iteration() {
         assert_eq!(iter.valid(), false);
         assert_eq!(iter.key(), None);
         assert_eq!(iter.value(), None);
+    }
 }
 
 
 #[test]
 pub fn test_seek_last() {
-    let db = setup_test_db("backwards_iteration");
+    let n = DBName::new("backwards_iteration");
+    {
+        let db = DB::open_default(&n.name).unwrap();
         db.put(b"k1", b"v1").unwrap();
         db.put(b"k2", b"v2").unwrap();
         db.put(b"k3", b"v3").unwrap();
@@ -90,12 +82,15 @@ pub fn test_seek_last() {
         assert_eq!(iter.valid(), false);
         assert_eq!(iter.key(), None);
         assert_eq!(iter.value(), None);
+    }
 }
 
 
 #[test]
 pub fn test_seek() {
-    let db = setup_test_db("seek");
+    let n = DBName::new("seek");
+    {
+        let db = DB::open_default(&n.name).unwrap();
         db.put(b"k1", b"v1").unwrap();
         db.put(b"k2", b"v2").unwrap();
         db.put(b"k4", b"v4").unwrap();
@@ -113,12 +108,15 @@ pub fn test_seek() {
         assert_eq!(iter.valid(), true);
         assert_eq!(iter.key(), Some(b"k4".to_vec()));
         assert_eq!(iter.value(), Some(b"v4".to_vec()));
+    }
 }
 
 
 #[test]
 pub fn test_seek_to_nonexistant() {
-    let db = setup_test_db("seek_to_nonexistant");
+    let n = DBName::new("seek_to_nonexistant");
+    {
+        let db = DB::open_default(&n.name).unwrap();
         db.put(b"k1", b"v1").unwrap();
         db.put(b"k3", b"v3").unwrap();
         db.put(b"k4", b"v4").unwrap();
@@ -129,11 +127,14 @@ pub fn test_seek_to_nonexistant() {
         assert_eq!(iter.valid(), true);
         assert_eq!(iter.key(), Some(b"k3".to_vec()));
         assert_eq!(iter.value(), Some(b"v3".to_vec()));
+    }
 }
 
 #[test]
 pub fn test_seek_for_prev() {
-    let db = setup_test_db("seek_for_prev");
+    let n = DBName::new("seek_for_prev");
+    {
+        let db = DB::open_default(&n.name).unwrap();
         db.put(b"k1", b"v1").unwrap();
         db.put(b"k2", b"v2").unwrap();
         db.put(b"k4", b"v4").unwrap();
@@ -151,4 +152,5 @@ pub fn test_seek_for_prev() {
         assert_eq!(iter.valid(), true);
         assert_eq!(iter.key(), Some(b"k2".to_vec()));
         assert_eq!(iter.value(), Some(b"v2".to_vec()));
+    }
 }

tests/test_rocksdb_options.rs

@@ -13,15 +13,18 @@
 // limitations under the License.
 //
 extern crate rocksdb;
+mod util;
 
 use rocksdb::{DB, Options};
+use util::DBName;
 
 #[test]
 fn test_set_num_levels() {
-    let path = "_rust_rocksdb_test_set_num_levels";
+    let n = DBName::new("_rust_rocksdb_test_set_num_levels");
+    {
         let mut opts = Options::default();
         opts.create_if_missing(true);
         opts.set_num_levels(2);
-    let db = DB::open(&opts, path).unwrap();
+        let _db = DB::open(&opts, &n.name).unwrap();
-    drop(db);
+    }
 }

tests/test_slice_transform.rs

@@ -1,11 +1,13 @@
 extern crate rocksdb;
+mod util;
 
 use rocksdb::{DB, Options, SliceTransform};
+use util::DBName;
 
 #[test]
 pub fn test_slice_transform() {
-
+    let n = DBName::new("_rust_rocksdb_slicetransform_test");
-    let path = "_rust_rocksdb_slicetransform_test";
+    {
         let a1: Box<[u8]> = key(b"aaa1");
         let a2: Box<[u8]> = key(b"aaa2");
         let b1: Box<[u8]> = key(b"bbb1");
@@ -21,7 +23,7 @@ pub fn test_slice_transform() {
         opts.create_if_missing(true);
         opts.set_prefix_extractor(prefix_extractor);
 
-    let db = DB::open(&opts, path).unwrap();
+        let db = DB::open(&opts, &n.name).unwrap();
 
         assert!(db.put(&*a1, &*a1).is_ok());
         assert!(db.put(&*a2, &*a2).is_ok());
@@ -45,4 +47,5 @@ pub fn test_slice_transform() {
             let b_iterator = db.prefix_iterator(b"bbb");
             assert_eq!(b_iterator.collect::<Vec<_>>(), expected)
         }
+    }
 }

tests/util/mod.rs

@@ -0,0 +1,34 @@
+extern crate rocksdb;
+
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use rocksdb::{DB, Options};
+
+// Ensures that DB::Destroy is called for this database when DBName is dropped.
+pub struct DBName {
+    pub name: String,
+}
+
+impl DBName {
+    // Suffixes the given `prefix` with a timestamp to ensure that subsequent test runs don't reuse
+    // an old database in case of panics prior to Drop being called.
+    pub fn new(prefix: &str) -> DBName {
+        let current_time = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
+        let name = format!(
+            "{}.{}.{}",
+            prefix,
+            current_time.as_secs(),
+            current_time.subsec_nanos()
+        );
+
+        DBName { name }
+    }
+}
+
+impl Drop for DBName {
+    fn drop(&mut self) {
+        let opts = Options::default();
+        DB::destroy(&opts, &self.name).unwrap();
+    }
+}
+