evaluator_test.go

/**
 * snowmark - HTML templates for Go.
 *
 * MIT License.
 * Copyright (c) 2022, Sandeep Gupta.
 * https://github.com/sangupta/snowmark
 *
 * Use of this source code is governed by a MIT style license
 * that can be found in LICENSE file in the code repository:
 */

package snowmark

import (
	"strings"
	"testing"

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

func TestEvaluatorBuilder(t *testing.T) {
	builder := strings.Builder{}
	ev := &Evaluator{
		builder:   &builder,
		processor: nil,
	}

	assert.Equal(t, "", ev.GetEvaluation())

	ev.WriteByte(65)
	assert.Equal(t, "A", ev.GetEvaluation())

	ev.WriteString(". ")
	assert.Equal(t, "A. ", ev.GetEvaluation())

	ev.WriteString("hello world")
	assert.Equal(t, "A. hello world", ev.GetEvaluation())

	ev.WriteRune('!')
	assert.Equal(t, "A. hello world!", ev.GetEvaluation())

	ev.Write([]byte(" you are awesome!"))
	assert.Equal(t, "A. hello world! you are awesome!", ev.GetEvaluation())
}

func TestEvaluatorMethods(t *testing.T) {
	// build ev
	builder := strings.Builder{}
	ev := &Evaluator{
		builder:   &builder,
		processor: nil,
	}

	// evaluate node
	e := ev.EvaluateNode(nil, nil)
	assert.NoError(t, e)

	// EvaluateNodes
	e = ev.EvaluateNodes(nil, nil)
	assert.NoError(t, e)

	emptyList := make([]*lhtml.HtmlNode, 0)
	e = ev.EvaluateNodes(emptyList, nil)
	assert.NoError(t, e)

	// EvaluateExpression
	value, e := ev.EvaluateExpression("", nil)
	assert.Equal(t, "", value)
	assert.NoError(t, e)

	// GetAttributeValue
	value, e = ev.GetAttributeValue(nil, "", nil)
	assert.Equal(t, "", value)
	assert.Error(t, e)

	value, e = ev.GetAttributeValue(nil, "hello", nil)
	assert.Equal(t, "", value)
	assert.Error(t, e)

	// GetAttributeValueAsString
	value, e = ev.GetAttributeValueAsString(nil, "hello", nil)
	assert.Equal(t, "", value)
	assert.Error(t, e)

	// processNormalNode
	e = ev.processNormalNode(nil, nil)
	assert.NoError(t, e)
}