97c759b9d8
This flattens Memory and Table types, particularly making it a compilation error to add multiple of either. This also backfills binary encoding of Table. Signed-off-by: Adrian Cole <adrian@tetrate.io>
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
package binary
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import (
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"bytes"
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"fmt"
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"testing"
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"github.com/stretchr/testify/require"
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wasm "github.com/tetratelabs/wazero/internal/wasm"
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)
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func TestTableType(t *testing.T) {
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zero := uint32(0)
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max := wasm.MaximumFunctionIndex
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tests := []struct {
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name string
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input *wasm.Table
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expected []byte
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}{
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{
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name: "min 0",
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input: &wasm.Table{},
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expected: []byte{wasm.ElemTypeFuncref, 0x0, 0},
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},
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{
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name: "min 0, max 0",
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input: &wasm.Table{Max: &zero},
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expected: []byte{wasm.ElemTypeFuncref, 0x1, 0, 0},
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},
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{
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name: "min largest",
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input: &wasm.Table{Min: max},
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expected: []byte{wasm.ElemTypeFuncref, 0x0, 0x80, 0x80, 0x80, 0x40},
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},
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{
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name: "min 0, max largest",
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input: &wasm.Table{Max: &max},
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expected: []byte{wasm.ElemTypeFuncref, 0x1, 0, 0x80, 0x80, 0x80, 0x40},
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},
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{
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name: "min largest max largest",
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input: &wasm.Table{Min: max, Max: &max},
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expected: []byte{wasm.ElemTypeFuncref, 0x1, 0x80, 0x80, 0x80, 0x40, 0x80, 0x80, 0x80, 0x40},
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},
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}
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for _, tt := range tests {
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tc := tt
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b := encodeTable(tc.input)
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t.Run(fmt.Sprintf("encode - %s", tc.name), func(t *testing.T) {
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require.Equal(t, tc.expected, b)
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})
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t.Run(fmt.Sprintf("decode - %s", tc.name), func(t *testing.T) {
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decoded, err := decodeTable(bytes.NewReader(b))
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require.NoError(t, err)
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require.Equal(t, decoded, tc.input)
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})
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}
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}
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func TestDecodeTableType_Errors(t *testing.T) {
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tests := []struct {
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name string
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input []byte
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expectedErr string
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}{
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{
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name: "not func ref",
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input: []byte{0x50, 0x1, 0x80, 0x80, 0x4, 0},
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expectedErr: "invalid element type 0x50 != funcref(0x70)",
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},
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{
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name: "max < min",
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input: []byte{wasm.ElemTypeFuncref, 0x1, 0x80, 0x80, 0x4, 0},
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expectedErr: "table size minimum must not be greater than maximum",
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},
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{
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name: "min > limit",
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input: []byte{wasm.ElemTypeFuncref, 0x0, 0xff, 0xff, 0xff, 0xff, 0xf},
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expectedErr: "table min must be at most 134217728",
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},
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{
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name: "max > limit",
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input: []byte{wasm.ElemTypeFuncref, 0x1, 0, 0xff, 0xff, 0xff, 0xff, 0xf},
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expectedErr: "table max must be at most 134217728",
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},
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}
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for _, tt := range tests {
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tc := tt
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t.Run(tc.name, func(t *testing.T) {
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_, err := decodeTable(bytes.NewReader(tc.input))
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require.EqualError(t, err, tc.expectedErr)
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})
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}
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}
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