component_test.go

package uiok

import (
	"context"
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
)

type testComponent struct {
	containerInit string
	containerEnd  string
	partial       string
}

func newTestComponent() *testComponent {
	c := &testComponent{
		containerInit: "<div>",
		containerEnd:  "</div>",
		partial:       "<div>Initial Partial Content</div>",
	}
	return c
}

func (c *testComponent) Change(context.Context) error {
	return nil
}

func (c *testComponent) Render() ([]byte, error) {
	partial, _ := c.Partial()
	return fmt.Appendf(nil, "%s%s%s",
		c.containerInit, string(partial), c.containerEnd), nil
}

func (c *testComponent) Partial() ([]byte, error) {
	return []byte(c.partial), nil
}

func TestComponent(t *testing.T) {
	t.Run("Should render and provide a parcial", func(t *testing.T) {
		testComp := newTestComponent()
		expectedRendered := []byte(
			"<div><div>Initial Partial Content</div></div>")
		rendered, _ := testComp.Render()
		assert.Equal(t, expectedRendered, rendered)
		expectedPartial := []byte("<div>Initial Partial Content</div>")
		partial, _ := testComp.Partial()
		assert.Equal(t, expectedPartial, partial)
	})
}