github.com/tetratelabs/wazero@v1.7.3-0.20240513003603-48f702e154b5/internal/testing/binaryencoding/export_test.go (about)

     1  package binaryencoding
     2  
     3  import (
     4  	"testing"
     5  
     6  	"github.com/tetratelabs/wazero/internal/testing/require"
     7  	"github.com/tetratelabs/wazero/internal/wasm"
     8  )
     9  
    10  func TestEncodeExport(t *testing.T) {
    11  	tests := []struct {
    12  		name     string
    13  		input    *wasm.Export
    14  		expected []byte
    15  	}{
    16  		{
    17  			name: "func no name, index 0",
    18  			input: &wasm.Export{ // e.g. (export "" (func 0)))
    19  				Type:  wasm.ExternTypeFunc,
    20  				Name:  "",
    21  				Index: 0,
    22  			},
    23  			expected: []byte{wasm.ExternTypeFunc, 0x00, 0x00},
    24  		},
    25  		{
    26  			name: "func name, func index 0",
    27  			input: &wasm.Export{ // e.g. (export "pi" (func 0))
    28  				Type:  wasm.ExternTypeFunc,
    29  				Name:  "pi",
    30  				Index: 0,
    31  			},
    32  			expected: []byte{
    33  				0x02, 'p', 'i',
    34  				wasm.ExternTypeFunc,
    35  				0x00,
    36  			},
    37  		},
    38  		{
    39  			name: "func name, index 10",
    40  			input: &wasm.Export{ // e.g. (export "pi" (func 10))
    41  				Type:  wasm.ExternTypeFunc,
    42  				Name:  "pi",
    43  				Index: 10,
    44  			},
    45  			expected: []byte{
    46  				0x02, 'p', 'i',
    47  				wasm.ExternTypeFunc,
    48  				0x0a,
    49  			},
    50  		},
    51  		{
    52  			name: "global no name, index 0",
    53  			input: &wasm.Export{ // e.g. (export "" (global 0)))
    54  				Type:  wasm.ExternTypeGlobal,
    55  				Name:  "",
    56  				Index: 0,
    57  			},
    58  			expected: []byte{0x00, wasm.ExternTypeGlobal, 0x00},
    59  		},
    60  		{
    61  			name: "global name, global index 0",
    62  			input: &wasm.Export{ // e.g. (export "pi" (global 0))
    63  				Type:  wasm.ExternTypeGlobal,
    64  				Name:  "pi",
    65  				Index: 0,
    66  			},
    67  			expected: []byte{
    68  				0x02, 'p', 'i',
    69  				wasm.ExternTypeGlobal,
    70  				0x00,
    71  			},
    72  		},
    73  		{
    74  			name: "global name, index 10",
    75  			input: &wasm.Export{ // e.g. (export "pi" (global 10))
    76  				Type:  wasm.ExternTypeGlobal,
    77  				Name:  "pi",
    78  				Index: 10,
    79  			},
    80  			expected: []byte{
    81  				0x02, 'p', 'i',
    82  				wasm.ExternTypeGlobal,
    83  				0x0a,
    84  			},
    85  		},
    86  		{
    87  			name: "memory no name, index 0",
    88  			input: &wasm.Export{ // e.g. (export "" (memory 0)))
    89  				Type:  wasm.ExternTypeMemory,
    90  				Name:  "",
    91  				Index: 0,
    92  			},
    93  			expected: []byte{0x00, wasm.ExternTypeMemory, 0x00},
    94  		},
    95  		{
    96  			name: "memory name, memory index 0",
    97  			input: &wasm.Export{ // e.g. (export "mem" (memory 0))
    98  				Type:  wasm.ExternTypeMemory,
    99  				Name:  "mem",
   100  				Index: 0,
   101  			},
   102  			expected: []byte{
   103  				0x03, 'm', 'e', 'm',
   104  				wasm.ExternTypeMemory,
   105  				0x00,
   106  			},
   107  		},
   108  		{
   109  			name: "memory name, index 10",
   110  			input: &wasm.Export{ // e.g. (export "mem" (memory 10))
   111  				Type:  wasm.ExternTypeMemory,
   112  				Name:  "mem",
   113  				Index: 10,
   114  			},
   115  			expected: []byte{
   116  				0x03, 'm', 'e', 'm',
   117  				wasm.ExternTypeMemory,
   118  				0x0a,
   119  			},
   120  		},
   121  	}
   122  
   123  	for _, tt := range tests {
   124  		tc := tt
   125  
   126  		t.Run(tc.name, func(t *testing.T) {
   127  			bytes := encodeExport(tc.input)
   128  			require.Equal(t, tc.expected, bytes)
   129  		})
   130  	}
   131  }