Support DieOnBadParams option, add tests

tests/02_die_on_bad_params_test.go

@@ -0,0 +1,72 @@
+package tests
+
+import (
+	"git.virtual.blue/tomgracey/template-nest-go"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestDieOnPageWithBadParams(t *testing.T) {
+	nest, err := templatenest.New(templatenest.Option{
+		TemplateDir:    "templates",
+		DieOnBadParams: true,
+	})
+	if err != nil {
+		t.Fatalf("Failed to initialize TemplateNest: %+v", err)
+	}
+
+	page := templatenest.Hash{
+		"TEMPLATE":         "00-simple-page",
+		"variable":         "Simple Variable",
+		"simple_component": "Simple Component",
+		"a_bad_param":      "Bad Param",
+	}
+
+	_, err = nest.Render(page)
+	if assert.NotNil(t, err) {
+		expected := "bad params in template hash, variable not present in template file: `a_bad_param`"
+		assert.Equal(t, expected, err.Error())
+	}
+}
+
+func TestDieOnPageWithBadParams01(t *testing.T) {
+	nest, err := templatenest.New(templatenest.Option{
+		TemplateDir:    "templates",
+		DieOnBadParams: true,
+	})
+	if err != nil {
+		t.Fatalf("Failed to initialize TemplateNest: %+v", err)
+	}
+
+	page := templatenest.Hash{
+		"TEMPLATE":    "00-simple-page",
+		"variable":    "Simple Variable",
+		"a_bad_param": "Bad Param",
+	}
+
+	_, err = nest.Render(page)
+	if assert.NotNil(t, err) {
+		expected := "bad params in template hash, variable not present in template file: `a_bad_param`"
+		assert.Equal(t, expected, err.Error())
+	}
+}
+
+func TestLiveOnPageWithBadParams(t *testing.T) {
+	nest, err := templatenest.New(templatenest.Option{
+		TemplateDir:    "templates",
+		DieOnBadParams: false,
+	})
+	if err != nil {
+		t.Fatalf("Failed to initialize TemplateNest: %+v", err)
+	}
+
+	page := templatenest.Hash{
+		"TEMPLATE":         "00-simple-page",
+		"variable":         "Simple Variable",
+		"simple_component": "Simple Component",
+		"a_bad_param":      "Bad Param",
+	}
+
+	_, err = nest.Render(page)
+	assert.Nil(t, err)
+}