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Add ensure package to simplify tests #25

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Add ensure package to simplify tests #25

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16 changes: 16 additions & 0 deletions ensure/ensure.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,16 @@
package ensure

import (
"testing"

"github.com/sagmor/fun"
)

// Value extracts a result Value or halts the test.
func Value[T any](t *testing.T, r fun.Result[T]) T {
if r.IsFailure() {
t.Fatal(r.Error())
}

return r.RequireValue()
}
14 changes: 9 additions & 5 deletions tests/builder_test.go
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Expand Up @@ -6,6 +6,7 @@ import (
"github.com/stretchr/testify/assert"

"github.com/sagmor/fun/builder"
"github.com/sagmor/fun/ensure"
)

type testBuildableObject struct {
Expand All @@ -19,11 +20,14 @@ func TestBuildReturnsAnObject(t *testing.T) {
}

func TestBuildExecutesOptions(t *testing.T) {
o := builder.Build(func(o *testBuildableObject) error {
o.Name = "other_name"
return nil
})
assert.Equal(t, "other_name", o.RequireValue().Name)
o := ensure.Value(t,
builder.Build(func(o *testBuildableObject) error {
o.Name = "other_name"
return nil
}),
)

assert.Equal(t, "other_name", o.Name)
}

func TestBuildPassThroughOptionErrors(t *testing.T) {
Expand Down