Source file src/github.com/tetratelabs/wazero/internal/gojs/values/values_test.go

Documentation: github.com/tetratelabs/wazero/internal/gojs/values

     1  package values
     2  
     3  import (
     4  	"testing"
     5  
     6  	"github.com/tetratelabs/wazero/internal/gojs/goos"
     7  	"github.com/tetratelabs/wazero/internal/testing/require"
     8  )
     9  
    10  func Test_Values(t *testing.T) {
    11  	t.Parallel()
    12  
    13  	vs := NewValues()
    14  
    15  	err := require.CapturePanic(func() {
    16  		_ = vs.Get(goos.NextID)
    17  	})
    18  	require.Contains(t, err.Error(), "is out of range 0")
    19  
    20  	v1 := "foo"
    21  	id1 := vs.Increment(v1)
    22  	v2 := "bar"
    23  	id2 := vs.Increment(v2)
    24  
    25  	require.Equal(t, goos.NextID, id1)
    26  	require.Equal(t, v1, vs.Get(id1))
    27  
    28  	// Second value should be at a sequential position
    29  	require.Equal(t, id1+1, id2)
    30  	require.Equal(t, v2, vs.Get(id2))
    31  
    32  	// Incrementing the ref count should return the same ID
    33  	require.Equal(t, id1, vs.Increment(v1))
    34  	require.Equal(t, v1, vs.Get(id1))
    35  
    36  	// Decrement and we should still get the value
    37  	vs.Decrement(id1)
    38  	require.Equal(t, v1, vs.Get(id1))
    39  
    40  	// Decrement again, and we should panic, as go should never attempt to
    41  	// get a value it already decremented to zero.
    42  	vs.Decrement(id1)
    43  	err = require.CapturePanic(func() {
    44  		_ = vs.Get(id1)
    45  	})
    46  	require.Contains(t, err.Error(), "was nil")
    47  
    48  	// Since the ID is no longer in use, we should be able to revive it.
    49  	require.Equal(t, id1, vs.Increment(v1))
    50  	require.Equal(t, v1, vs.Get(id1))
    51  }
    52  

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