07a814a105
The type we use to expose write operations is still evolving. It might be a single writefs.FS interface, or similar to go where we have an interface per feature (e.g. writefs.MkdirFS). These choices are all implementation details for DirFS and won't be settled before the end of the month version cutoff. Instead, this only exposes the ability to create a DirFS, not an arbitrary implementation of writefs.FS. This does so by making `writefs.FS` an internal type. Signed-off-by: Adrian Cole <adrian@tetrate.io>
61 lines
1.9 KiB
Go
61 lines
1.9 KiB
Go
package wazero
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import (
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_ "embed"
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"testing"
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"github.com/tetratelabs/wazero/internal/testing/require"
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)
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func TestRuntime_Namespace_Independent(t *testing.T) {
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r := NewRuntime(testCtx)
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defer r.Close(testCtx)
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// Compile a module to add to the runtime
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compiled, err := r.NewHostModuleBuilder("env").Compile(testCtx)
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require.NoError(t, err)
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// Instantiate "env" into the runtime default namespace (base case)
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require.Nil(t, r.Module("env"))
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m1, err := r.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.NoError(t, err)
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require.Equal(t, m1, r.Module("env"))
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// NewNamespace does not inherit modules in the default namespace
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ns1 := r.NewNamespace(testCtx)
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require.Nil(t, ns1.Module("env"))
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// Ensure this namespace has a new instance of "env"
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m2, err := ns1.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.NoError(t, err)
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require.NotSame(t, m1, m2)
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// Ensure the next namespace is similarly independent.
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ns2 := r.NewNamespace(testCtx)
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m3, err := ns2.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.NoError(t, err)
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require.NotSame(t, m1, m3)
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require.NotSame(t, m2, m3)
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// Ensure we can't re-instantiate the same module multiple times.
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_, err = ns2.InstantiateModule(testCtx, compiled, NewModuleConfig())
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require.EqualError(t, err, "module[env] has already been instantiated")
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// Ensure we can instantiate the same module multiple times.
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m4, err := ns2.InstantiateModule(testCtx, compiled, NewModuleConfig().WithName("env2"))
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require.NoError(t, err)
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require.NotSame(t, m3, m4)
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// Ensure closing one namespace doesn't affect another
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require.NoError(t, ns2.Close(testCtx))
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require.Nil(t, ns2.Module("env"))
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require.Nil(t, ns2.Module("env2"))
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require.Equal(t, m1, r.Module("env"))
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require.Equal(t, m2, ns1.Module("env"))
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// Ensure closing the Runtime closes all namespaces
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require.NoError(t, r.Close(testCtx))
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require.Nil(t, r.Module("env"))
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require.Nil(t, ns1.Module("env"))
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}
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