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57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
package values
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import (
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"fmt"
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"reflect"
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"strings"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestCall(t *testing.T) {
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fn := func(a, b string) string {
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return a + "," + b + "."
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}
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value, err := Call(reflect.ValueOf(fn), []interface{}{5, 10})
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require.NoError(t, err)
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require.Equal(t, "5,10.", value)
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// extra arguments (variadic)
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fnVaridic := func(a string, b ...string) string {
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return a + "," + strings.Join(b, ",") + "."
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}
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value, err = Call(reflect.ValueOf(fnVaridic), []interface{}{5, 10})
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require.NoError(t, err)
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require.Equal(t, "5,10.", value)
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value, err = Call(reflect.ValueOf(fnVaridic), []interface{}{5, 10, 15, 20})
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require.NoError(t, err)
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require.Equal(t, "5,10,15,20.", value)
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// extra arguments (non variadic)
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_, err = Call(reflect.ValueOf(fn), []interface{}{5, 10, 20})
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require.Error(t, err)
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require.Contains(t, err.Error(), "wrong number of arguments")
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require.Contains(t, err.Error(), "given 3")
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require.Contains(t, err.Error(), "expected 2")
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// error return
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fn2 := func(int) (int, error) { return 0, fmt.Errorf("expected error") }
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_, err = Call(reflect.ValueOf(fn2), []interface{}{2})
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require.Error(t, err)
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require.Contains(t, err.Error(), "expected error")
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}
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func TestCall_optional(t *testing.T) {
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fn := func(a string, b func(string) string) string {
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return a + "," + b("default") + "."
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}
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value, err := Call(reflect.ValueOf(fn), []interface{}{5})
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require.NoError(t, err)
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require.Equal(t, "5,default.", value)
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value, err = Call(reflect.ValueOf(fn), []interface{}{5, 10})
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require.NoError(t, err)
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require.Equal(t, "5,10.", value)
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}
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