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abi_test.go
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abi_test.go
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package wit
import (
"fmt"
"math"
"reflect"
"testing"
)
func TestAlign(t *testing.T) {
tests := []struct {
ptr uintptr
align uintptr
want uintptr
}{
{0, 1, 0},
{0, 2, 0},
{0, 4, 0},
{0, 8, 0},
{1, 1, 1},
{1, 2, 2},
{1, 4, 4},
{1, 8, 8},
{2, 1, 2},
{2, 2, 2},
{2, 4, 4},
{2, 8, 8},
{3, 1, 3},
{3, 2, 4},
{3, 4, 4},
{3, 8, 8},
{4, 1, 4},
{4, 2, 4},
{4, 4, 4},
{4, 8, 8},
{5, 1, 5},
{5, 2, 6},
{5, 4, 8},
{5, 8, 8},
{6, 1, 6},
{6, 2, 6},
{6, 4, 8},
{6, 8, 8},
{7, 1, 7},
{7, 2, 8},
{7, 4, 8},
{7, 8, 8},
{8, 1, 8},
{8, 2, 8},
{8, 4, 8},
{8, 8, 8},
{9, 1, 9},
{9, 2, 10},
{9, 4, 12},
{9, 8, 16},
{10, 1, 10},
{10, 2, 10},
{10, 4, 12},
{10, 8, 16},
}
for _, tt := range tests {
name := fmt.Sprintf("%d,%d=%d", tt.ptr, tt.align, tt.want)
t.Run(name, func(t *testing.T) {
got := Align(tt.ptr, tt.align)
if got != tt.want {
t.Errorf("Align(%d, %d): expected %d, got %d", tt.ptr, tt.align, tt.want, got)
}
})
}
}
func TestDiscriminant(t *testing.T) {
tests := []struct {
n int
want Type
}{
{0, U8{}},
{1, U8{}},
{5, U8{}},
{8, U8{}},
{255, U8{}},
{256, U8{}},
{257, U16{}},
{10000, U16{}},
{32768, U16{}},
{65536, U16{}},
{65537, U32{}},
{1 << 24, U32{}},
{math.MaxInt32, U32{}},
}
for _, tt := range tests {
name := fmt.Sprintf("%d", tt.n)
t.Run(name, func(t *testing.T) {
got := Discriminant(tt.n)
if got != tt.want {
t.Errorf("Discriminant(%d): expected %T, got %T", tt.n, tt.want, got)
}
})
}
}
func TestTypeSize(t *testing.T) {
tests := []struct {
name string
v Type
size uintptr
align uintptr
}{
{"bool", Bool{}, 1, 1},
{"s8", S8{}, 1, 1},
{"u8", U8{}, 1, 1},
{"s16", S16{}, 2, 2},
{"u16", U16{}, 2, 2},
{"s32", S32{}, 4, 4},
{"u32", U32{}, 4, 4},
{"s64", S64{}, 8, 8},
{"u64", U64{}, 8, 8},
{"f32", F32{}, 4, 4},
{"f64", F64{}, 8, 8},
{"char", Char{}, 4, 4},
{"string", String{}, 8, 4},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
size := tt.v.Size()
if size != tt.size {
t.Errorf("(Type).Size(): %d, expected %d", size, tt.size)
}
align := tt.v.Align()
if align != tt.align {
t.Errorf("(Type).Align(): %d, expected %d", align, tt.align)
}
})
}
}
func TestTypeFlat(t *testing.T) {
tests := []struct {
name string
v Type
want []Type
}{
{"bool", Bool{}, []Type{U32{}}},
{"s8", S8{}, []Type{U32{}}},
{"u8", U8{}, []Type{U32{}}},
{"s16", S16{}, []Type{U32{}}},
{"u16", U16{}, []Type{U32{}}},
{"s32", S32{}, []Type{U32{}}},
{"u32", U32{}, []Type{U32{}}},
{"s64", S64{}, []Type{U64{}}},
{"u64", U64{}, []Type{U64{}}},
{"f32", F32{}, []Type{F32{}}},
{"f64", F64{}, []Type{F64{}}},
{"char", Char{}, []Type{U32{}}},
{"string", String{}, []Type{PointerTo(U8{}), U32{}}},
{"option<string>", &TypeDef{Kind: &Option{Type: String{}}}, []Type{U32{}, PointerTo(U8{}), U32{}}},
{"option<f32>", &TypeDef{Kind: &Option{Type: F32{}}}, []Type{U32{}, F32{}}},
{"variant", &TypeDef{Kind: &Variant{Cases: []Case{{Type: String{}}, {Type: F64{}}}}}, []Type{U32{}, U64{}, U32{}}},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tt.v.Flat()
if !reflect.DeepEqual(tt.want, got) {
t.Errorf("(Type).Flat(): %v, expected %v", witFor(got...), witFor(tt.want...))
}
})
}
}
func witFor[T Node](nodes ...T) []string {
out := make([]string, len(nodes))
for i, node := range nodes {
out[i] = node.WIT(nil, "")
}
return out
}
// TestHasBorrow verifies that HasBorrow returns true for WIT types that contain a Borrow type.
func TestHasBorrow(t *testing.T) {
makeBorrow := func() *TypeDef { return &TypeDef{Kind: &Borrow{}} }
makeTypeDef := func(kind TypeDefKind) *TypeDef { return &TypeDef{Kind: kind} }
testCases := []struct {
name string
typeDef *TypeDef
expected bool
}{
{"Simple Borrow", makeBorrow(), true},
{"Record with Borrow", makeTypeDef(&Record{Fields: []Field{{Type: makeBorrow()}}}), true},
{"List of Record with Borrow", makeTypeDef(&List{Type: makeTypeDef(&Record{Fields: []Field{{Type: makeBorrow()}}})}), true},
{"Record without Borrow", makeTypeDef(&Record{Fields: []Field{{Type: makeTypeDef(&String{})}}}), false},
{"Nested Option with Borrow", makeTypeDef(&Option{Type: makeBorrow()}), true},
{"Nested Option without Borrow", makeTypeDef(&Option{Type: makeTypeDef(&String{})}), false},
{"Variant with Borrow", makeTypeDef(&Variant{Cases: []Case{{Type: makeBorrow()}}}), true},
{"Variant without Borrow", makeTypeDef(&Variant{Cases: []Case{{Type: makeTypeDef(&String{})}}}), false},
{"Result with Borrow in Ok", makeTypeDef(&Result{OK: makeBorrow(), Err: makeTypeDef(&String{})}), true},
{"Result with Borrow in Err", makeTypeDef(&Result{OK: makeTypeDef(&String{}), Err: makeBorrow()}), true},
{"Result without Borrow", makeTypeDef(&Result{OK: makeTypeDef(&String{}), Err: makeTypeDef(&String{})}), false},
{"Future with Borrow", makeTypeDef(&Future{Type: makeBorrow()}), true},
{"Future without Borrow", makeTypeDef(&Future{Type: makeTypeDef(&String{})}), false},
{"Tuple with Borrow", makeTypeDef(&Tuple{Types: []Type{makeTypeDef(&String{}), makeBorrow()}}), true},
{"Tuple without Borrow", makeTypeDef(&Tuple{Types: []Type{makeTypeDef(&String{}), makeTypeDef(&String{})}}), false},
{"Enum without Borrow", makeTypeDef(&Enum{Cases: []EnumCase{{Name: "A"}, {Name: "B"}}}), false},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
if result := HasBorrow(tc.typeDef); result != tc.expected {
t.Errorf("HasBorrow(%q) = %t; want %t", tc.name, result, tc.expected)
}
})
}
}