Added test coverage for template renderer.

services/template_renderer_test.go

@@ -0,0 +1,70 @@
+package services
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"goweb/config"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestTemplateRenderer(t *testing.T) {
+	group := "test"
+	id := "parse"
+
+	// Should not exist yet
+	_, err := c.TemplateRenderer.Load(group, id)
+	assert.Error(t, err)
+
+	// Parse in to the cache
+	err = c.TemplateRenderer.Parse(
+		group,
+		id,
+		"htmx",
+		[]string{"htmx", "pages/error"},
+		[]string{"components"},
+	)
+	require.NoError(t, err)
+
+	// Should exist now
+	parsed, err := c.TemplateRenderer.Load(group, id)
+	require.NoError(t, err)
+
+	// Check that all expected templates are included
+	expectedTemplates := make(map[string]bool)
+	expectedTemplates["htmx"+config.TemplateExt] = true
+	expectedTemplates["error"+config.TemplateExt] = true
+	components, err := ioutil.ReadDir(c.TemplateRenderer.GetTemplatesPath() + "/components")
+	require.NoError(t, err)
+	for _, f := range components {
+		expectedTemplates[f.Name()] = true
+	}
+	for _, v := range parsed.Templates() {
+		delete(expectedTemplates, v.Name())
+	}
+	assert.Empty(t, expectedTemplates)
+
+	data := struct {
+		StatusCode int
+	}{
+		StatusCode: 500,
+	}
+	buf, err := c.TemplateRenderer.Execute(group, id, "htmx", data)
+	require.NoError(t, err)
+	require.NotNil(t, buf)
+	assert.Contains(t, buf.String(), "Please try again")
+
+	buf, err = c.TemplateRenderer.ParseAndExecute(
+		group,
+		id,
+		"htmx",
+		[]string{"htmx", "pages/error"},
+		[]string{"components"},
+		data,
+	)
+	require.NoError(t, err)
+	require.NotNil(t, buf)
+	assert.Contains(t, buf.String(), "Please try again")
+}