57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package datagen
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import (
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"testing"
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"github.com/dop251/goja"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"go.k6.io/k6/js/modulestest"
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)
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func TestGenerator(t *testing.T) {
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vu := &modulestest.VU{
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RuntimeField: goja.New(),
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}
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t.Run("fails on negative size", func(t *testing.T) {
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require.Panics(t, func() {
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_ = NewGenerator(vu, -1, "", false)
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})
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})
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t.Run("fails on zero size", func(t *testing.T) {
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require.Panics(t, func() {
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_ = NewGenerator(vu, 0, "", false)
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})
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})
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t.Run("creates slice of specified size", func(t *testing.T) {
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size := 10
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g := NewGenerator(vu, size, "", false)
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slice := g.nextSlice()
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require.Len(t, slice, size)
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})
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t.Run("creates a different slice on each call", func(t *testing.T) {
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g := NewGenerator(vu, 1000, "", false)
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slice1 := g.nextSlice()
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slice2 := g.nextSlice()
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// Each slice should be unique (assuming that 1000 random bytes will never coincide
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// to be identical)
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assert.NotEqual(t, slice1, slice2)
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})
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t.Run("keeps generating slices after consuming entire tail", func(t *testing.T) {
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g := NewGenerator(vu, 1000, "", false)
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initialSlice := g.nextSlice()
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for i := 0; i < TailSize; i++ {
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g.nextSlice()
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}
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// After we looped around our tail and returned to the beginning we should have a
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// unique slice - not the same as in the beginning
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sliceAfterTail := g.nextSlice()
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assert.NotEqual(t, initialSlice, sliceAfterTail)
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})
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}
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