Improve test coverage.

cursor.go

@@ -154,9 +154,7 @@ func (c *Cursor) keyValue() ([]byte, []byte) {
 
 // node returns the node that the cursor is currently positioned on.
 func (c *Cursor) node(t *RWTransaction) *node {
-	if len(c.stack) == 0 {
-		return nil
-	}
+	_assert(len(c.stack) > 0, "accessing a node with a zero-length cursor stack")
 
 	// Start from root and traverse down the hierarchy.
 	n := t.node(c.stack[0].page.id, nil)

db.go

@@ -240,7 +240,7 @@ func (db *DB) Close() {
 
 func (db *DB) close() {
 	db.opened = false
-	
+
 	// TODO(benbjohnson): Undo everything in Open().
 	db.freelist = nil
 	db.path = ""
@@ -432,10 +432,6 @@ func (db *DB) Delete(name string, key []byte) error {
 // A reader transaction is maintained during the copy so it is safe to continue
 // using the database while a copy is in progress.
 func (db *DB) Copy(w io.Writer) error {
-	if !db.opened {
-		return DatabaseNotOpenError
-	}
-
 	// Maintain a reader transaction so pages don't get reclaimed.
 	t, err := db.Transaction()
 	if err != nil {
@@ -514,14 +510,3 @@ func (db *DB) allocate(count int) (*page, error) {
 
 	return p, nil
 }
-
-// sync flushes the file descriptor to disk.
-func (db *DB) sync(force bool) error {
-	if db.opened {
-		return DatabaseNotOpenError
-	}
-	if err := syscall.Fsync(int(db.file.Fd())); err != nil {
-		return err
-	}
-	return nil
-}

db_test.go

@@ -178,6 +178,14 @@ func TestDBDelete(t *testing.T) {
 	})
 }
 
+// Ensure that a delete on a missing bucket returns an error.
+func TestDBDeleteFromMissingBucket(t *testing.T) {
+	withOpenDB(func(db *DB, path string) {
+		err := db.Delete("widgets", []byte("foo"))
+		assert.Equal(t, err, BucketNotFoundError)
+	})
+}
+
 // Ensure a database can provide a transactional block.
 func TestDBTransactionBlock(t *testing.T) {
 	withOpenDB(func(db *DB, path string) {
@@ -196,19 +204,62 @@ func TestDBTransactionBlock(t *testing.T) {
 	})
 }
 
-// Ensure that the database can be copied to a writer.
-func TestDBCopy(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+// Ensure a closed database returns an error while running a transaction block
+func TestDBTransactionBlockWhileClosed(t *testing.T) {
+	withDB(func(db *DB, path string) {
+		err := db.Do(func(txn *RWTransaction) error {
+			txn.CreateBucket("widgets")
+			return nil
+		})
+		assert.Equal(t, err, DatabaseNotOpenError)
+	})
+}
+
+// Ensure a closed database returns an error when finding a bucket.
+func TestDBBucketWhileClosed(t *testing.T) {
+	withDB(func(db *DB, path string) {
+		b, err := db.Bucket("widgets")
+		assert.Equal(t, err, DatabaseNotOpenError)
+		assert.Nil(t, b)
+	})
+}
+
+// Ensure a closed database returns an error when finding all buckets.
+func TestDBBucketsWhileClosed(t *testing.T) {
+	withDB(func(db *DB, path string) {
+		b, err := db.Buckets()
+		assert.Equal(t, err, DatabaseNotOpenError)
+		assert.Nil(t, b)
+	})
+}
+
+// Ensure a closed database returns an error when getting a key.
+func TestDBGetWhileClosed(t *testing.T) {
+	withDB(func(db *DB, path string) {
+		value, err := db.Get("widgets", []byte("foo"))
+		assert.Equal(t, err, DatabaseNotOpenError)
+		assert.Nil(t, value)
+	})
 }
 
 // Ensure that the database can be copied to a file path.
 func TestDBCopyFile(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
-}
+	withOpenDB(func(db *DB, path string) {
+		db.CreateBucket("widgets")
+		db.Put("widgets", []byte("foo"), []byte("bar"))
+		db.Put("widgets", []byte("baz"), []byte("bat"))
+		assert.NoError(t, os.RemoveAll("/tmp/bolt.copyfile.db"))
+		assert.NoError(t, db.CopyFile("/tmp/bolt.copyfile.db", 0666))
 
-// Ensure that the database can sync to the file system.
-func TestDBSync(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+		var db2 DB
+		assert.NoError(t, db2.Open("/tmp/bolt.copyfile.db", 0666))
+		defer db2.Close()
+
+		value, _ := db2.Get("widgets", []byte("foo"))
+		assert.Equal(t, value, []byte("bar"))
+		value, _ = db2.Get("widgets", []byte("baz"))
+		assert.Equal(t, value, []byte("bat"))
+	})
 }
 
 // Ensure that an error is returned when a database write fails.

rwtransaction_test.go

@@ -21,6 +21,15 @@ func TestRWTransaction(t *testing.T) {
 	})
 }
 
+// Ensure that opening a RWTransaction while the DB is closed returns an error.
+func TestRWTransactionOpenWithClosedDB(t *testing.T) {
+	withDB(func(db *DB, path string) {
+		txn, err := db.RWTransaction()
+		assert.Equal(t, err, DatabaseNotOpenError)
+		assert.Nil(t, txn)
+	})
+}
+
 // Ensure that a bucket can be created and retrieved.
 func TestRWTransactionCreateBucket(t *testing.T) {
 	withOpenDB(func(db *DB, path string) {
@@ -69,7 +78,23 @@ func TestRWTransactionCreateBucketWithLongName(t *testing.T) {
 
 // Ensure that a bucket can be deleted.
 func TestRWTransactionDeleteBucket(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+	withOpenDB(func(db *DB, path string) {
+		// Create a bucket and add a value.
+		db.CreateBucket("widgets")
+		db.Put("widgets", []byte("foo"), []byte("bar"))
+
+		// Delete the bucket and make sure we can't get the value.
+		assert.NoError(t, db.DeleteBucket("widgets"))
+		value, err := db.Get("widgets", []byte("foo"))
+		assert.Equal(t, err, BucketNotFoundError)
+		assert.Nil(t, value)
+
+		// Create the bucket again and make sure there's not a phantom value.
+		assert.NoError(t, db.CreateBucket("widgets"))
+		value, err = db.Get("widgets", []byte("foo"))
+		assert.NoError(t, err)
+		assert.Nil(t, value)
+	})
 }
 
 // Ensure that a bucket can return an autoincrementing sequence.
@@ -100,27 +125,38 @@ func TestRWTransactionNextSequence(t *testing.T) {
 
 // Ensure that an error is returned when inserting into a bucket that doesn't exist.
 func TestRWTransactionPutBucketNotFound(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+	withOpenDB(func(db *DB, path string) {
+		err := db.Put("widgets", []byte("foo"), []byte("bar"))
+		assert.Equal(t, err, BucketNotFoundError)
+	})
 }
 
 // Ensure that an error is returned when inserting with an empty key.
 func TestRWTransactionPutEmptyKey(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+	withOpenDB(func(db *DB, path string) {
+		db.CreateBucket("widgets")
+		err := db.Put("widgets", []byte(""), []byte("bar"))
+		assert.Equal(t, err, KeyRequiredError)
+		err = db.Put("widgets", nil, []byte("bar"))
+		assert.Equal(t, err, KeyRequiredError)
+	})
 }
 
 // Ensure that an error is returned when inserting with a key that's too large.
 func TestRWTransactionPutKeyTooLarge(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
-}
-
-// Ensure that an error is returned when inserting with data that's too large.
-func TestRWTransactionPutDataTooLarge(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+	withOpenDB(func(db *DB, path string) {
+		db.CreateBucket("widgets")
+		err := db.Put("widgets", make([]byte, 32769), []byte("bar"))
+		assert.Equal(t, err, KeyTooLargeError)
+	})
 }
 
 // Ensure that an error is returned when deleting from a bucket that doesn't exist.
 func TestRWTransactionDeleteBucketNotFound(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+	withOpenDB(func(db *DB, path string) {
+		err := db.DeleteBucket("widgets")
+		assert.Equal(t, err, BucketNotFoundError)
+	})
 }
 
 // Ensure that a bucket can write random keys and values across multiple txns.

transaction.go

@@ -63,8 +63,12 @@ func (t *Transaction) Bucket(name string) *Bucket {
 
 // Buckets retrieves a list of all buckets.
 func (t *Transaction) Buckets() []*Bucket {
-	warn("[pending] Transaction.Buckets()") // TODO
-	return nil
+	buckets := make([]*Bucket, 0, len(t.buckets.items))
+	for name, b := range t.buckets.items {
+		bucket := &Bucket{bucket: b, transaction: t, name: name}
+		buckets = append(buckets, bucket)
+	}
+	return buckets
 }
 
 // Cursor creates a cursor associated with a given bucket.

transaction_test.go

@@ -12,7 +12,17 @@ import (
 
 // Ensure that the database can retrieve a list of buckets.
 func TestTransactionBuckets(t *testing.T) {
-	t.Skip("pending") // TODO(benbjohnson)
+	withOpenDB(func(db *DB, path string) {
+		db.CreateBucket("foo")
+		db.CreateBucket("bar")
+		db.CreateBucket("baz")
+		buckets, err := db.Buckets()
+		if assert.NoError(t, err) && assert.Equal(t, len(buckets), 3) {
+			assert.Equal(t, buckets[0].Name(), "bar")
+			assert.Equal(t, buckets[1].Name(), "baz")
+			assert.Equal(t, buckets[2].Name(), "foo")
+		}
+	})
 }
 
 // Ensure that a Transaction can retrieve a bucket.