126bd9050d
We originally had a `context.Context` for anything that might be traced, but it turned out to be only useful for lifecycle and host functions. For instruction-scoped aspects like memory updates, a context parameter is too fine-grained and also invisible in practice. For example, most users will use the compiler engine, and its memory, global or table access will never use go's context. Signed-off-by: Adrian Cole <adrian@tetrate.io>
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
package platform
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import (
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"testing"
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"time"
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"github.com/tetratelabs/wazero/internal/testing/require"
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"github.com/tetratelabs/wazero/sys"
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)
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func Test_NewFakeWalltime(t *testing.T) {
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wt := NewFakeWalltime()
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// Base should be the same as FakeEpochNanos
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sec, nsec := (*wt)()
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ft := time.UnixMicro(FakeEpochNanos / time.Microsecond.Nanoseconds()).UTC()
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require.Equal(t, ft, time.Unix(sec, int64(nsec)).UTC())
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// next reading should increase by 1ms
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sec, nsec = (*wt)()
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require.Equal(t, ft.Add(time.Millisecond), time.Unix(sec, int64(nsec)).UTC())
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}
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func Test_NewFakeNanotime(t *testing.T) {
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nt := NewFakeNanotime()
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require.Equal(t, int64(0), (*nt)())
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// next reading should increase by 1ms
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require.Equal(t, int64(time.Millisecond), (*nt)())
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}
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func Test_Walltime(t *testing.T) {
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now := time.Now().Unix()
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sec, nsec := Walltime()
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// Loose test that the second variant is close to now.
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// The only thing that could flake this is a time adjustment during the test.
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require.True(t, now == sec || now == sec-1)
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// Verify bounds of nanosecond fraction as measuring it precisely won't work.
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require.True(t, nsec >= 0)
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require.True(t, nsec < int32(time.Second.Nanoseconds()))
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}
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func Test_Nanotime(t *testing.T) {
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tests := []struct {
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name string
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nanotime sys.Nanotime
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}{
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{"Nanotime", Nanotime},
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{"nanotimePortable", nanotimePortable},
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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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delta := time.Since(nanoBase).Nanoseconds()
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nanos := Nanotime()
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// It takes more than a nanosecond to make the two clock readings required
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// to implement time.Now. Hence, delta will always be less than nanos.
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require.True(t, delta <= nanos)
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})
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}
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}
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func Test_Nanosleep(t *testing.T) {
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// In CI, Nanosleep(50ms) returned after 197ms.
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// As we can't control the platform clock, we have to be lenient
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ns := int64(50 * time.Millisecond)
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max := ns * 5
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start := Nanotime()
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Nanosleep(ns)
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duration := Nanotime() - start
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require.True(t, duration > 0 && duration < max, "Nanosleep(%d) slept for %d", ns, duration)
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}
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