runner_example_test.go

package ep_test

import (
	"fmt"
	"github.com/panoplyio/ep"
	"github.com/panoplyio/ep/eptest"
)

func ExampleRunner() {
	upper := &upper{}
	data := ep.NewDataset(strs([]string{"hello", "world"}))
	data, err := eptest.Run(upper, data)
	fmt.Println(data.Strings(), err)

	// Output:
	// [(HELLO) (WORLD)] <nil>
}

func ExampleFilterRunner_Filter() {
	runner := ep.Project(&question{}, &upper{}, &question{}).(ep.FilterRunner)
	runner.Filter([]bool{false, true, false})

	data := ep.NewDataset(strs([]string{"hello", "world"}))
	res, err := eptest.Run(runner, data)
	fmt.Println(res.Strings(), err)

	// Output:
	// [(HELLO) (WORLD)] <nil>
}

func ExampleScopesRunner_Scopes() {
	runner := ep.Pipeline(&question{}, &upper{})
	fmt.Println(runner.(ep.ScopesRunner).Scopes())

	// Output:
	// map[upper_scope:{}]
}

func ExampleApproxSizer_ApproxSize() {
	var runner ep.Runner = &runnerWithSize{size: 42}
	fmt.Println(runner.(ep.ApproxSizer).ApproxSize())

	// Output:
	// 42
}