1527e019e9
Before, complicated wasm could be hard to implement, particularly as it might have cyclic imports. This change allows users to re-map imports to untangle any cycles or to break up monolithic modules like "env". Signed-off-by: Adrian Cole <adrian@tetrate.io>
783 lines
20 KiB
Go
783 lines
20 KiB
Go
package wazero
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import (
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"context"
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"io"
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"math"
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"testing"
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"testing/fstest"
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"github.com/stretchr/testify/require"
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"github.com/tetratelabs/wazero/internal/wasm"
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)
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func TestRuntimeConfig(t *testing.T) {
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tests := []struct {
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name string
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with func(*RuntimeConfig) *RuntimeConfig
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expected *RuntimeConfig
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}{
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{
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name: "WithContext",
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with: func(c *RuntimeConfig) *RuntimeConfig {
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return c.WithContext(context.TODO())
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},
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expected: &RuntimeConfig{
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ctx: context.TODO(),
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},
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},
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{
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name: "WithContext - nil",
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with: func(c *RuntimeConfig) *RuntimeConfig {
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return c.WithContext(nil) //nolint
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},
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expected: &RuntimeConfig{
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ctx: context.Background(),
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},
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},
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{
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name: "WithMemoryMaxPages",
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with: func(c *RuntimeConfig) *RuntimeConfig {
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return c.WithMemoryMaxPages(1)
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},
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expected: &RuntimeConfig{
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memoryMaxPages: 1,
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},
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},
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{
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name: "mutable-global",
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with: func(c *RuntimeConfig) *RuntimeConfig {
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return c.WithFeatureMutableGlobal(true)
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},
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expected: &RuntimeConfig{
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enabledFeatures: wasm.FeatureMutableGlobal,
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},
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},
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{
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name: "sign-extension-ops",
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with: func(c *RuntimeConfig) *RuntimeConfig {
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return c.WithFeatureSignExtensionOps(true)
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},
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expected: &RuntimeConfig{
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enabledFeatures: wasm.FeatureSignExtensionOps,
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},
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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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input := &RuntimeConfig{}
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rc := tc.with(input)
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require.Equal(t, tc.expected, rc)
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// The source wasn't modified
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require.Equal(t, &RuntimeConfig{}, input)
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})
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}
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}
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func TestRuntimeConfig_FeatureToggle(t *testing.T) {
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tests := []struct {
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name string
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feature wasm.Features
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expectDefault bool
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setFeature func(*RuntimeConfig, bool) *RuntimeConfig
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}{
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{
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name: "mutable-global",
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feature: wasm.FeatureMutableGlobal,
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expectDefault: true,
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setFeature: func(c *RuntimeConfig, v bool) *RuntimeConfig {
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return c.WithFeatureMutableGlobal(v)
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},
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},
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{
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name: "sign-extension-ops",
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feature: wasm.FeatureSignExtensionOps,
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expectDefault: false,
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setFeature: func(c *RuntimeConfig, v bool) *RuntimeConfig {
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return c.WithFeatureSignExtensionOps(v)
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},
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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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c := NewRuntimeConfig()
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require.Equal(t, tc.expectDefault, c.enabledFeatures.Get(tc.feature))
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// Set to false even if it was initially false.
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c = tc.setFeature(c, false)
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require.False(t, c.enabledFeatures.Get(tc.feature))
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// Set true makes it true
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c = tc.setFeature(c, true)
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require.True(t, c.enabledFeatures.Get(tc.feature))
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// Set false makes it false again
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c = tc.setFeature(c, false)
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require.False(t, c.enabledFeatures.Get(tc.feature))
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})
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}
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}
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func TestModuleConfig(t *testing.T) {
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tests := []struct {
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name string
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with func(*ModuleConfig) *ModuleConfig
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expected *ModuleConfig
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}{
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{
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name: "WithName",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithName("wazero")
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},
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expected: &ModuleConfig{
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name: "wazero",
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},
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},
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{
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name: "WithName - empty",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithName("")
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},
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expected: &ModuleConfig{},
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},
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{
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name: "WithImport",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("env", "abort", "assemblyscript", "abort")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000abort": {"assemblyscript", "abort"}},
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},
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},
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{
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name: "WithImport - empty to non-empty - module",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("", "abort", "assemblyscript", "abort")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{"\000abort": {"assemblyscript", "abort"}},
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},
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},
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{
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name: "WithImport - non-empty to empty - module",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("env", "abort", "", "abort")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000abort": {"", "abort"}},
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},
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},
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{
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name: "WithImport - empty to non-empty - name",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("env", "", "assemblyscript", "abort")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000": {"assemblyscript", "abort"}},
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},
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},
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{
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name: "WithImport - non-empty to empty - name",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("env", "abort", "assemblyscript", "")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000abort": {"assemblyscript", ""}},
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},
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},
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{
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name: "WithImport - override",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("env", "abort", "assemblyscript", "abort").
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WithImport("env", "abort", "go", "exit")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000abort": {"go", "exit"}},
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},
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},
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{
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name: "WithImport - twice",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImport("env", "abort", "assemblyscript", "abort").
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WithImport("wasi_unstable", "proc_exit", "wasi_snapshot_preview1", "proc_exit")
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},
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expected: &ModuleConfig{
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replacedImports: map[string][2]string{
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"env\000abort": {"assemblyscript", "abort"},
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"wasi_unstable\000proc_exit": {"wasi_snapshot_preview1", "proc_exit"},
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},
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},
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},
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{
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name: "WithImportModule",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImportModule("env", "assemblyscript")
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},
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expected: &ModuleConfig{
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replacedImportModules: map[string]string{"env": "assemblyscript"},
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},
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},
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{
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name: "WithImportModule - empty to non-empty",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImportModule("", "assemblyscript")
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},
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expected: &ModuleConfig{
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replacedImportModules: map[string]string{"": "assemblyscript"},
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},
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},
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{
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name: "WithImportModule - non-empty to empty",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImportModule("env", "")
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},
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expected: &ModuleConfig{
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replacedImportModules: map[string]string{"env": ""},
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},
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},
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{
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name: "WithImportModule - override",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImportModule("env", "assemblyscript").
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WithImportModule("env", "go")
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},
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expected: &ModuleConfig{
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replacedImportModules: map[string]string{"env": "go"},
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},
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},
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{
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name: "WithImportModule - twice",
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with: func(c *ModuleConfig) *ModuleConfig {
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return c.WithImportModule("env", "go").
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WithImportModule("wasi_unstable", "wasi_snapshot_preview1")
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},
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expected: &ModuleConfig{
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replacedImportModules: map[string]string{
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"env": "go",
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"wasi_unstable": "wasi_snapshot_preview1",
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},
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},
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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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input := &ModuleConfig{}
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rc := tc.with(input)
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require.Equal(t, tc.expected, rc)
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})
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}
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}
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func TestModuleConfig_replaceImports(t *testing.T) {
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tests := []struct {
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name string
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config *ModuleConfig
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input *wasm.Module
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expected *wasm.Module
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expectSame bool
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}{
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{
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name: "no config, no imports",
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config: &ModuleConfig{},
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input: &wasm.Module{},
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expected: &wasm.Module{},
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expectSame: true,
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},
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{
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name: "no config",
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config: &ModuleConfig{},
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input: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "wasi_snapshot_preview1", Name: "args_sizes_get",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasi_snapshot_preview1", Name: "fd_write",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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expectSame: true,
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},
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{
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name: "replacedImportModules",
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config: &ModuleConfig{
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replacedImportModules: map[string]string{"wasi_unstable": "wasi_snapshot_preview1"},
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},
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input: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "wasi_unstable", Name: "args_sizes_get",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasi_unstable", Name: "fd_write",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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expected: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "wasi_snapshot_preview1", Name: "args_sizes_get",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasi_snapshot_preview1", Name: "fd_write",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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},
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{
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name: "replacedImportModules doesn't match",
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config: &ModuleConfig{
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replacedImportModules: map[string]string{"env": ""},
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},
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input: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "wasi_snapshot_preview1", Name: "args_sizes_get",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasi_snapshot_preview1", Name: "fd_write",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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expectSame: true,
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},
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{
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name: "replacedImports",
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config: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000abort": {"assemblyscript", "abort"}},
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},
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input: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "env", Name: "abort",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "env", Name: "seed",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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expected: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "assemblyscript", Name: "abort",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "env", Name: "seed",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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},
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{
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name: "replacedImports don't match",
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config: &ModuleConfig{
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replacedImports: map[string][2]string{"env\000abort": {"assemblyscript", "abort"}},
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},
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input: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "wasi_snapshot_preview1", Name: "args_sizes_get",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasi_snapshot_preview1", Name: "fd_write",
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Type: wasm.ExternTypeFunc,
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DescFunc: 2,
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},
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},
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},
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expectSame: true,
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},
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{
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name: "replacedImportModules and replacedImports",
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config: &ModuleConfig{
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replacedImportModules: map[string]string{"js": "wasm"},
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replacedImports: map[string][2]string{
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"wasm\000increment": {"go", "increment"},
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"wasm\000decrement": {"go", "decrement"},
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},
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},
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input: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "js", Name: "tbl",
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Type: wasm.ExternTypeTable,
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DescTable: &wasm.Table{Min: 4},
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},
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{
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Module: "js", Name: "increment",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "js", Name: "decrement",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "js", Name: "wasm_increment",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "js", Name: "wasm_increment",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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},
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},
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expected: &wasm.Module{
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ImportSection: []*wasm.Import{
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{
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Module: "wasm", Name: "tbl",
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Type: wasm.ExternTypeTable,
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DescTable: &wasm.Table{Min: 4},
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},
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{
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Module: "go", Name: "increment",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "go", Name: "decrement",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasm", Name: "wasm_increment",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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{
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Module: "wasm", Name: "wasm_increment",
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Type: wasm.ExternTypeFunc,
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DescFunc: 0,
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},
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},
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},
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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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actual := tc.config.replaceImports(tc.input)
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if tc.expectSame {
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require.Same(t, tc.input, actual)
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} else {
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require.NotSame(t, tc.input, actual)
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require.Equal(t, tc.expected, actual)
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}
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})
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}
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}
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|
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func TestModuleConfig_toSysContext(t *testing.T) {
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testFS := fstest.MapFS{}
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testFS2 := fstest.MapFS{}
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|
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tests := []struct {
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name string
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input *ModuleConfig
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expected *wasm.SysContext
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}{
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{
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name: "empty",
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input: NewModuleConfig(),
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expected: requireSysContext(t,
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math.MaxUint32, // max
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nil, // args
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nil, // environ
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nil, // stdin
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nil, // stdout
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nil, // stderr
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nil, // openedFiles
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),
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},
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{
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name: "WithArgs",
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input: NewModuleConfig().WithArgs("a", "bc"),
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expected: requireSysContext(t,
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math.MaxUint32, // max
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[]string{"a", "bc"}, // args
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nil, // environ
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nil, // stdin
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nil, // stdout
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nil, // stderr
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nil, // openedFiles
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),
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},
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{
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name: "WithArgs - empty ok", // Particularly argv[0] can be empty, and we have no rules about others.
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input: NewModuleConfig().WithArgs("", "bc"),
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expected: requireSysContext(t,
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math.MaxUint32, // max
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[]string{"", "bc"}, // args
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nil, // environ
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nil, // stdin
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nil, // stdout
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nil, // stderr
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nil, // openedFiles
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),
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},
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{
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name: "WithArgs - second call overwrites",
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input: NewModuleConfig().WithArgs("a", "bc").WithArgs("bc", "a"),
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expected: requireSysContext(t,
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|
math.MaxUint32, // max
|
|
[]string{"bc", "a"}, // args
|
|
nil, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
nil, // openedFiles
|
|
),
|
|
},
|
|
{
|
|
name: "WithEnv",
|
|
input: NewModuleConfig().WithEnv("a", "b"),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
[]string{"a=b"}, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
nil, // openedFiles
|
|
),
|
|
},
|
|
{
|
|
name: "WithEnv - empty value",
|
|
input: NewModuleConfig().WithEnv("a", ""),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
[]string{"a="}, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
nil, // openedFiles
|
|
),
|
|
},
|
|
{
|
|
name: "WithEnv twice",
|
|
input: NewModuleConfig().WithEnv("a", "b").WithEnv("c", "de"),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
[]string{"a=b", "c=de"}, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
nil, // openedFiles
|
|
),
|
|
},
|
|
{
|
|
name: "WithEnv overwrites",
|
|
input: NewModuleConfig().WithEnv("a", "bc").WithEnv("c", "de").WithEnv("a", "de"),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
[]string{"a=de", "c=de"}, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
nil, // openedFiles
|
|
),
|
|
},
|
|
|
|
{
|
|
name: "WithEnv twice",
|
|
input: NewModuleConfig().WithEnv("a", "b").WithEnv("c", "de"),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
[]string{"a=b", "c=de"}, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
nil, // openedFiles
|
|
),
|
|
},
|
|
{
|
|
name: "WithFS",
|
|
input: NewModuleConfig().WithFS(testFS),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
nil, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
map[uint32]*wasm.FileEntry{ // openedFiles
|
|
3: {Path: "/", FS: testFS},
|
|
4: {Path: ".", FS: testFS},
|
|
},
|
|
),
|
|
},
|
|
{
|
|
name: "WithFS - overwrites",
|
|
input: NewModuleConfig().WithFS(testFS).WithFS(testFS2),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
nil, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
map[uint32]*wasm.FileEntry{ // openedFiles
|
|
3: {Path: "/", FS: testFS2},
|
|
4: {Path: ".", FS: testFS2},
|
|
},
|
|
),
|
|
},
|
|
{
|
|
name: "WithWorkDirFS",
|
|
input: NewModuleConfig().WithWorkDirFS(testFS),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
nil, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
map[uint32]*wasm.FileEntry{ // openedFiles
|
|
3: {Path: ".", FS: testFS},
|
|
},
|
|
),
|
|
},
|
|
{
|
|
name: "WithFS and WithWorkDirFS",
|
|
input: NewModuleConfig().WithFS(testFS).WithWorkDirFS(testFS2),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
nil, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
map[uint32]*wasm.FileEntry{ // openedFiles
|
|
3: {Path: "/", FS: testFS},
|
|
4: {Path: ".", FS: testFS2},
|
|
},
|
|
),
|
|
},
|
|
{
|
|
name: "WithWorkDirFS and WithFS",
|
|
input: NewModuleConfig().WithWorkDirFS(testFS).WithFS(testFS2),
|
|
expected: requireSysContext(t,
|
|
math.MaxUint32, // max
|
|
nil, // args
|
|
nil, // environ
|
|
nil, // stdin
|
|
nil, // stdout
|
|
nil, // stderr
|
|
map[uint32]*wasm.FileEntry{ // openedFiles
|
|
3: {Path: ".", FS: testFS},
|
|
4: {Path: "/", FS: testFS2},
|
|
},
|
|
),
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
tc := tt
|
|
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
sys, err := tc.input.toSysContext()
|
|
require.NoError(t, err)
|
|
require.Equal(t, tc.expected, sys)
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestModuleConfig_toSysContext_Errors(t *testing.T) {
|
|
tests := []struct {
|
|
name string
|
|
input *ModuleConfig
|
|
expectedErr string
|
|
}{
|
|
{
|
|
name: "WithArgs - arg contains NUL",
|
|
input: NewModuleConfig().WithArgs("", string([]byte{'a', 0})),
|
|
expectedErr: "args invalid: contains NUL character",
|
|
},
|
|
{
|
|
name: "WithEnv - key contains NUL",
|
|
input: NewModuleConfig().WithEnv(string([]byte{'a', 0}), "a"),
|
|
expectedErr: "environ invalid: contains NUL character",
|
|
},
|
|
{
|
|
name: "WithEnv - value contains NUL",
|
|
input: NewModuleConfig().WithEnv("a", string([]byte{'a', 0})),
|
|
expectedErr: "environ invalid: contains NUL character",
|
|
},
|
|
{
|
|
name: "WithEnv - key contains equals",
|
|
input: NewModuleConfig().WithEnv("a=", "a"),
|
|
expectedErr: "environ invalid: key contains '=' character",
|
|
},
|
|
{
|
|
name: "WithEnv - empty key",
|
|
input: NewModuleConfig().WithEnv("", "a"),
|
|
expectedErr: "environ invalid: empty key",
|
|
},
|
|
{
|
|
name: "WithFS - nil",
|
|
input: NewModuleConfig().WithFS(nil),
|
|
expectedErr: "FS for / is nil",
|
|
},
|
|
{
|
|
name: "WithWorkDirFS - nil",
|
|
input: NewModuleConfig().WithWorkDirFS(nil),
|
|
expectedErr: "FS for . is nil",
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
tc := tt
|
|
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
_, err := tc.input.toSysContext()
|
|
require.EqualError(t, err, tc.expectedErr)
|
|
})
|
|
}
|
|
}
|
|
|
|
// requireSysContext ensures wasm.NewSysContext doesn't return an error, which makes it usable in test matrices.
|
|
func requireSysContext(t *testing.T, max uint32, args, environ []string, stdin io.Reader, stdout, stderr io.Writer, openedFiles map[uint32]*wasm.FileEntry) *wasm.SysContext {
|
|
sys, err := wasm.NewSysContext(max, args, environ, stdin, stdout, stderr, openedFiles)
|
|
require.NoError(t, err)
|
|
return sys
|
|
}
|