test(mysql): add some basic unit tests for types to experiment

sqlx-mysql/src/type_info.rs

@@ -117,7 +117,38 @@ impl TypeInfo for MySqlTypeInfo {
         self.id.is_null()
     }
 
-    fn name(&self) -> &str {
+    fn name(&self) -> &'static str {
         self.name()
     }
 }
+
+#[cfg(test)]
+impl MySqlTypeInfo {
+    pub(crate) const TINYINT_1: Self =
+        Self { id: MySqlTypeId::TINYINT, max_size: 1, flags: ColumnFlags::empty(), charset: 0 };
+
+    pub(crate) const BIGINT: Self =
+        Self { id: MySqlTypeId::BIGINT, max_size: 0, flags: ColumnFlags::empty(), charset: 0 };
+
+    pub(crate) const BINARY: Self = Self {
+        id: MySqlTypeId::CHAR,
+        max_size: 0,
+        flags: ColumnFlags::BINARY_COLLATION,
+        charset: 0,
+    };
+}
+
+#[cfg(test)]
+mod tests {
+    use super::MySqlTypeInfo;
+
+    #[test]
+    fn should_identify_boolean() {
+        assert_eq!(MySqlTypeInfo::TINYINT_1.name(), "BOOLEAN");
+    }
+
+    #[test]
+    fn should_identify_binary() {
+        assert_eq!(MySqlTypeInfo::BINARY.name(), "BINARY");
+    }
+}

sqlx-mysql/src/types/bool.rs

@@ -27,3 +27,31 @@ impl<'r> Decode<'r, MySql> for bool {
         Ok(raw.decode::<u8>()? != 0)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use bytes::Bytes;
+    use sqlx_core::Result;
+
+    use crate::{MySqlRawValue, MySqlRawValueFormat, MySqlTypeInfo};
+
+    #[test]
+    fn decode_bool_from_tinyint() -> Result<()> {
+        let bytes = Bytes::from_static(b"\x01");
+        let val: bool = MySqlRawValue::binary(&bytes, &MySqlTypeInfo::TINYINT_1).decode()?;
+
+        assert_eq!(val, true);
+
+        Ok(())
+    }
+
+    #[test]
+    fn decode_bool_from_bigint() -> Result<()> {
+        let bytes = Bytes::from_static(b"\x01\x00\x00\x00\x00\x00\x00\x00");
+        let val: bool = MySqlRawValue::binary(&bytes, &MySqlTypeInfo::BIGINT).decode()?;
+
+        assert_eq!(val, true);
+
+        Ok(())
+    }
+}

sqlx-mysql/src/types/str.rs

@@ -2,8 +2,7 @@ use std::str::from_utf8_unchecked;
 
 use bytes::Bytes;
 use bytestring::ByteString;
-use sqlx_core::{decode, encode, Type};
-use sqlx_core::{Decode, Encode};
+use sqlx_core::{decode, encode, Decode, Encode, Type};
 
 use crate::io::MySqlWriteExt;
 use crate::type_info::MySqlTypeInfo;