bung 0.1.0

#[macro_use]
extern crate serde_derive;

use bung::Serializer;
use serde::Serialize;

#[test]
fn pass_unit_struct() {
	#[derive(Serialize)]
	struct Unit;

	let mut buf = Vec::new();
	Unit.serialize(&mut Serializer::new(&mut buf)).unwrap();

	// Expect: [].
	assert_eq!(vec![0x90], buf);
}

#[test]
fn pass_unit_variant() {
	#[derive(Serialize)]
	enum Enum {
		V1,
		V2,
	}

	let mut buf = Vec::new();
	Enum::V1.serialize(&mut Serializer::new(&mut buf)).unwrap();
	Enum::V2.serialize(&mut Serializer::new(&mut buf)).unwrap();

	// Expect: "V1", "V2"
	assert_eq!(vec![0xa2, 0x56, 0x31, 0xa2, 0x56, 0x32], buf);
}

#[test]
fn pass_newtype_struct() {
	#[derive(Serialize)]
	struct Struct(u64);

	let val = Struct(42);
	let mut buf = Vec::new();
	val.serialize(&mut Serializer::new(&mut buf)).unwrap();

	assert_eq!(vec![0x2a], buf);
}

#[test]
fn pass_newtype_variant() {
	#[derive(Serialize)]
	enum Enum {
		V2(u64),
	}

	let mut buf = Vec::new();
	Enum::V2(42).serialize(&mut Serializer::new(&mut buf)).unwrap();

	// Expect: {"V2" => 42}
	assert_eq!(buf, vec![0x81, 0xa2, 0x56, 0x32, 42]);
}

#[test]
fn pass_untagged_newtype_variant() {
	#[derive(Serialize)]
	#[serde(untagged)]
	enum Enum1 {
		A(u64),
		B(Enum2),
	}

	#[derive(Serialize)]
	enum Enum2 {
		C,
	}

	let buf1 = bung::to_vec(&Enum1::A(123)).unwrap();
	let buf2 = bung::to_vec(&Enum1::B(Enum2::C)).unwrap();

	assert_eq!(buf1, [123]);
	// Expect: "C"
	assert_eq!(buf2, [0xa1, 0x43]);
}

#[test]
fn pass_tuple_struct() {
	#[derive(Serialize)]
	struct Struct(u32, u64);

	let val = Struct(42, 100500);
	let mut buf = Vec::new();
	val.serialize(&mut Serializer::new(&mut buf)).unwrap();

	// Expect: [42, 100500].
	assert_eq!(vec![0x92, 0x2a, 0xce, 0x00, 0x01, 0x88, 0x94], buf);
}

#[test]
fn pass_tuple_variant() {
	#[derive(Serialize)]
	enum Enum {
		V1,
		V2(u32, u64),
	}

	let mut buf = Vec::new();
	Enum::V1.serialize(&mut Serializer::new(&mut buf)).unwrap();
	Enum::V2(42, 100500).serialize(&mut Serializer::new(&mut buf)).unwrap();

	// Expect: {0 => nil} {1 => [42, 100500]}
	// Expect: "V1", {"V2" => [42, 100500] }
	assert_eq!(
		vec![0xa2, 0x56, 0x31, 0x81, 0xa2, 0x56, 0x32, 0x92, 0x2a, 0xce, 0x0, 0x1, 0x88, 0x94],
		buf
	);
}

#[test]
fn pass_struct() {
	#[derive(Serialize)]
	struct Struct {
		f1: u32,
		f2: u32,
	}

	let val = Struct {
		f1: 42,
		f2: 100500,
	};
	let mut buf = Vec::new();
	val.serialize(&mut Serializer::new(&mut buf)).unwrap();

	// Expect: [42, 100500].
	assert_eq!(vec![0x92, 0x2a, 0xce, 0x0, 0x1, 0x88, 0x94], buf);
}

#[test]
fn serialize_struct_variant() {
	#[derive(Serialize)]
	enum Enum {
		V1 {
			f1: u32,
		},
		V2 {
			f1: u32,
		},
	}

	let mut buf = Vec::new();
	Enum::V1 {
		f1: 42,
	}
	.serialize(&mut Serializer::new(&mut buf))
	.unwrap();
	Enum::V2 {
		f1: 43,
	}
	.serialize(&mut Serializer::new(&mut buf))
	.unwrap();

	// Expect: { "V1" => [42] } { "V2" => [43] }
	assert_eq!(vec![0x81, 0xa2, 0x56, 0x31, 0x91, 0x2a, 0x81, 0xa2, 0x56, 0x32, 0x91, 0x2b], buf);
}

#[test]
fn serialize_struct_variant_as_map() {
	#[derive(Serialize)]
	enum Enum {
		V1 {
			f1: u32,
		},
	}

	let mut se = Serializer::new(Vec::new()).with_struct_map();
	Enum::V1 {
		f1: 42,
	}
	.serialize(&mut se)
	.unwrap();

	// Expect: {"V1" => {"f1": 42}}.
	assert_eq!(vec![0x81, 0xa2, 0x56, 0x31, 0x81, 0xa2, 0x66, 0x31, 0x2a], se.into_inner());
}

#[test]
fn serialize_struct_with_flattened_map_field() {
	use std::collections::BTreeMap;

	#[derive(Serialize)]
	struct Struct {
		f1: u32,
		// not flattend!
		f2: BTreeMap<String, String>,
		#[serde(flatten)]
		f3: BTreeMap<String, String>,
	}

	let mut se = Serializer::new(Vec::new());
	Struct {
		f1: 0,
		f2: {
			let mut map = BTreeMap::new();
			map.insert("german".to_string(), "Hallo Welt!".to_string());
			map
		},
		f3: {
			let mut map = BTreeMap::new();
			map.insert("english".to_string(), "Hello World!".to_string());
			map
		},
	}
	.serialize(&mut se)
	.unwrap();

	// Expect: { "f1": 0, "f2": { "german": "Hallo Welt!" }, "english": "Hello World!" }.
	assert_eq!(
		vec![
			0x83, 0xA2, 0x66, 0x31, 0x00, 0xA2, 0x66, 0x32, 0x81, 0xA6, 0x67, 0x65, 0x72, 0x6D,
			0x61, 0x6E, 0xAB, 0x48, 0x61, 0x6C, 0x6C, 0x6F, 0x20, 0x57, 0x65, 0x6C, 0x74, 0x21,
			0xA7, 0x65, 0x6E, 0x67, 0x6C, 0x69, 0x73, 0x68, 0xAC, 0x48, 0x65, 0x6C, 0x6C, 0x6F,
			0x20, 0x57, 0x6F, 0x72, 0x6C, 0x64, 0x21,
		],
		se.into_inner()
	);
}

#[test]
fn serialize_struct_with_flattened_struct_field() {
	#[derive(Serialize)]
	struct Struct {
		f1: u32,
		// not flattend!
		f2: InnerStruct,
		#[serde(flatten)]
		f3: InnerStruct,
	}

	#[derive(Serialize)]
	struct InnerStruct {
		f4: u32,
		f5: u32,
	}

	let strct = Struct {
		f1: 0,
		f2: InnerStruct {
			f4: 8,
			f5: 13,
		},
		f3: InnerStruct {
			f4: 21,
			f5: 34,
		},
	};

	// struct-as-tuple
	{
		let mut se = Serializer::new(Vec::new());
		strct.serialize(&mut se).unwrap();

		// Expect: { "f1": 0, "f2": [8, 13], "f4": 21, "f5": 34 }.
		assert_eq!(
			vec![
				0x84, 0xA2, 0x66, 0x31, 0x00, 0xA2, 0x66, 0x32, 0x92, 0x08, 0x0D, 0xA2, 0x66, 0x34,
				0x15, 0xA2, 0x66, 0x35, 0x22,
			],
			se.into_inner()
		);
	}

	// struct-as-map
	{
		let mut se = Serializer::new(Vec::new()).with_struct_map();
		strct.serialize(&mut se).unwrap();

		// Expect: { "f1": 0, "f2": { "f4": 8, "f5": 13 }, "f4": 21, "f5": 34 }.
		assert_eq!(
			vec![
				0x84, 0xA2, 0x66, 0x31, 0x00, 0xA2, 0x66, 0x32, 0x82, 0xA2, 0x66, 0x34, 0x08, 0xA2,
				0x66, 0x35, 0x0D, 0xA2, 0x66, 0x34, 0x15, 0xA2, 0x66, 0x35, 0x22,
			],
			se.into_inner()
		);
	}
}

#[test]
fn pass_struct_as_map_using_ext() {
	#[derive(Serialize)]
	struct Dog<'a> {
		name: &'a str,
		age: u16,
	}

	let dog = Dog {
		name: "Bobby",
		age: 8,
	};

	let mut se = Serializer::new(Vec::new()).with_struct_map();

	dog.serialize(&mut se).unwrap();

	// Expect: {"name": "Bobby", "age": 8}.
	assert_eq!(
		vec![
			0x82, 0xa4, 0x6e, 0x61, 0x6d, 0x65, 0xa5, 0x42, 0x6f, 0x62, 0x62, 0x79, 0xa3, 0x61,
			0x67, 0x65, 0x08
		],
		se.into_inner()
	);
}

#[test]
fn pass_struct_as_tuple_using_double_ext() {
	#[derive(Serialize)]
	struct Dog<'a> {
		name: &'a str,
		age: u16,
	}

	let dog = Dog {
		name: "Bobby",
		age: 8,
	};

	let mut se = Serializer::new(Vec::new()).with_struct_map().with_struct_tuple();

	dog.serialize(&mut se).unwrap();

	assert_eq!(vec![0x92, 0xa5, 0x42, 0x6f, 0x62, 0x62, 0x79, 0x08], se.into_inner());
}

#[test]
fn pass_struct_as_map_using_triple_ext() {
	#[derive(Serialize)]
	struct Dog<'a> {
		name: &'a str,
		age: u16,
	}

	let dog = Dog {
		name: "Bobby",
		age: 8,
	};

	let mut se =
		Serializer::new(Vec::new()).with_struct_map().with_struct_tuple().with_struct_map();

	dog.serialize(&mut se).unwrap();

	// Expect: {"name": "Bobby", "age": 8}.
	assert_eq!(
		vec![
			0x82, 0xa4, 0x6e, 0x61, 0x6d, 0x65, 0xa5, 0x42, 0x6f, 0x62, 0x62, 0x79, 0xa3, 0x61,
			0x67, 0x65, 0x08
		],
		se.into_inner()
	);
}

#[test]
fn pass_struct_as_map_using_triple_ext_many_times() {
	#[derive(Serialize)]
	struct Dog<'a> {
		name: &'a str,
		age: u16,
	}

	let dog = Dog {
		name: "Bobby",
		age: 8,
	};

	let mut se = Serializer::new(Vec::new())
		.with_struct_map()
		.with_struct_tuple()
		.with_struct_map()
		.with_struct_map()
		.with_struct_map()
		.with_struct_map();

	dog.serialize(&mut se).unwrap();

	// Expect: {"name": "Bobby", "age": 8}.
	assert_eq!(
		vec![
			0x82, 0xa4, 0x6e, 0x61, 0x6d, 0x65, 0xa5, 0x42, 0x6f, 0x62, 0x62, 0x79, 0xa3, 0x61,
			0x67, 0x65, 0x08
		],
		se.into_inner()
	);
}