Fix tests

postgres-protocol/src/types/test.rs

@@ -1,3 +1,4 @@
+use bytes::BytesMut;
 use fallible_iterator::FallibleIterator;
 use std::collections::HashMap;
 
@@ -6,32 +7,32 @@ use crate::IsNull;
 
 #[test]
 fn bool() {
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     bool_to_sql(true, &mut buf);
     assert_eq!(bool_from_sql(&buf).unwrap(), true);
 
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     bool_to_sql(false, &mut buf);
     assert_eq!(bool_from_sql(&buf).unwrap(), false);
 }
 
 #[test]
 fn int2() {
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     int2_to_sql(0x0102, &mut buf);
     assert_eq!(int2_from_sql(&buf).unwrap(), 0x0102);
 }
 
 #[test]
 fn int4() {
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     int4_to_sql(0x0102_0304, &mut buf);
     assert_eq!(int4_from_sql(&buf).unwrap(), 0x0102_0304);
 }
 
 #[test]
 fn int8() {
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     int8_to_sql(0x0102_0304_0506_0708, &mut buf);
     assert_eq!(int8_from_sql(&buf).unwrap(), 0x0102_0304_0506_0708);
 }
@@ -39,7 +40,7 @@ fn int8() {
 #[test]
 #[allow(clippy::float_cmp)]
 fn float4() {
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     float4_to_sql(10343.95, &mut buf);
     assert_eq!(float4_from_sql(&buf).unwrap(), 10343.95);
 }
@@ -47,7 +48,7 @@ fn float4() {
 #[test]
 #[allow(clippy::float_cmp)]
 fn float8() {
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     float8_to_sql(10343.95, &mut buf);
     assert_eq!(float8_from_sql(&buf).unwrap(), 10343.95);
 }
@@ -58,7 +59,7 @@ fn hstore() {
     map.insert("hello", Some("world"));
     map.insert("hola", None);
 
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     hstore_to_sql(map.iter().map(|(&k, &v)| (k, v)), &mut buf).unwrap();
     assert_eq!(
         hstore_from_sql(&buf)
@@ -74,7 +75,7 @@ fn varbit() {
     let len = 12;
     let bits = [0b0010_1011, 0b0000_1111];
 
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     varbit_to_sql(len, bits.iter().cloned(), &mut buf).unwrap();
     let out = varbit_from_sql(&buf).unwrap();
     assert_eq!(out.len(), len);
@@ -95,7 +96,7 @@ fn array() {
     ];
     let values = [None, Some(&b"hello"[..])];
 
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     array_to_sql(
         dimensions.iter().cloned(),
         10,
@@ -132,7 +133,7 @@ fn non_null_array() {
     ];
     let values = [Some(&b"hola"[..]), Some(&b"hello"[..])];
 
-    let mut buf = vec![];
+    let mut buf = BytesMut::new();
     array_to_sql(
         dimensions.iter().cloned(),
         10,