helm/pkg/chartutil/values_test.go

/*
Copyright 2016 The Kubernetes Authors All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package chartutil

import (
	"bytes"
	"encoding/json"
	"fmt"
	"testing"
	"text/template"

	"k8s.io/helm/pkg/proto/hapi/chart"
)

func TestReadValues(t *testing.T) {
	doc := `# Test YAML parse
poet: "Coleridge"
title: "Rime of the Ancient Mariner"
stanza:
  - "at"
  - "length"
  - "did"
  - cross
  - an
  - Albatross

mariner:
  with: "crossbow"
  shot: "ALBATROSS"

water:
  water:
    where: "everywhere"
    nor: "any drop to drink"
`

	data, err := ReadValues([]byte(doc))
	if err != nil {
		t.Fatalf("Error parsing bytes: %s", err)
	}
	matchValues(t, data)
}

func TestReadValuesFile(t *testing.T) {
	data, err := ReadValuesFile("./testdata/coleridge.yaml")
	if err != nil {
		t.Fatalf("Error reading YAML file: %s", err)
	}
	matchValues(t, data)
}

func ExampleValues() {
	doc := `
title: "Moby Dick"
chapter:
  one:
    title: "Loomings"
  two:
    title: "The Carpet-Bag"
  three:
    title: "The Spouter Inn"
`
	d, err := ReadValues([]byte(doc))
	if err != nil {
		panic(err)
	}
	ch1, err := d.Table("chapter.one")
	if err != nil {
		panic("could not find chapter one")
	}
	fmt.Print(ch1["title"])
	// Output:
	// Loomings
}

func TestTable(t *testing.T) {
	doc := `
title: "Moby Dick"
chapter:
  one:
    title: "Loomings"
  two:
    title: "The Carpet-Bag"
  three:
    title: "The Spouter Inn"
`
	d, err := ReadValues([]byte(doc))
	if err != nil {
		t.Fatalf("Failed to parse the White Whale: %s", err)
	}

	if _, err := d.Table("title"); err == nil {
		t.Fatalf("Title is not a table.")
	}

	if _, err := d.Table("chapter"); err != nil {
		t.Fatalf("Failed to get the chapter table: %s\n%v", err, d)
	}

	if v, err := d.Table("chapter.one"); err != nil {
		t.Errorf("Failed to get chapter.one: %s", err)
	} else if v["title"] != "Loomings" {
		t.Errorf("Unexpected title: %s", v["title"])
	}

	if _, err := d.Table("chapter.three"); err != nil {
		t.Errorf("Chapter three is missing: %s\n%v", err, d)
	}

	if _, err := d.Table("chapter.OneHundredThirtySix"); err == nil {
		t.Errorf("I think you mean 'Epilogue'")
	}
}

func matchValues(t *testing.T, data map[string]interface{}) {
	if data["poet"] != "Coleridge" {
		t.Errorf("Unexpected poet: %s", data["poet"])
	}

	if o, err := ttpl("{{len .stanza}}", data); err != nil {
		t.Errorf("len stanza: %s", err)
	} else if o != "6" {
		t.Errorf("Expected 6, got %s", o)
	}

	if o, err := ttpl("{{.mariner.shot}}", data); err != nil {
		t.Errorf(".mariner.shot: %s", err)
	} else if o != "ALBATROSS" {
		t.Errorf("Expected that mariner shot ALBATROSS")
	}

	if o, err := ttpl("{{.water.water.where}}", data); err != nil {
		t.Errorf(".water.water.where: %s", err)
	} else if o != "everywhere" {
		t.Errorf("Expected water water everywhere")
	}
}

func ttpl(tpl string, v map[string]interface{}) (string, error) {
	var b bytes.Buffer
	tt := template.Must(template.New("t").Parse(tpl))
	if err := tt.Execute(&b, v); err != nil {
		return "", err
	}
	return b.String(), nil
}

var testCoalesceValuesYaml = `
top: yup

global:
  name: Ishmael
  subject: Queequeg

pequod:
  global:
    name: Stinky
    harpooner: Tashtego
  ahab:
    scope: whale
`

func TestCoalesceValues(t *testing.T) {
	tchart := "testdata/moby"
	overrides := map[string]interface{}{
		"override": "good",
	}
	c, err := LoadDir(tchart)
	if err != nil {
		t.Fatal(err)
	}

	tvals := &chart.Config{Raw: testCoalesceValuesYaml}

	v, err := CoalesceValues(c, tvals, overrides)
	j, _ := json.MarshalIndent(v, "", "  ")
	t.Logf("Coalesced Values: %s", string(j))

	tests := []struct {
		tpl    string
		expect string
	}{
		{"{{.top}}", "yup"},
		{"{{.override}}", "good"},
		{"{{.name}}", "moby"},
		{"{{.global.name}}", "Ishmael"},
		{"{{.global.subject}}", "Queequeg"},
		{"{{.global.harpooner}}", "<no value>"},
		{"{{.pequod.name}}", "pequod"},
		{"{{.pequod.ahab.name}}", "ahab"},
		{"{{.pequod.ahab.scope}}", "whale"},
		{"{{.pequod.ahab.global.name}}", "Ishmael"},
		{"{{.pequod.ahab.global.subject}}", "Queequeg"},
		{"{{.pequod.ahab.global.harpooner}}", "Tashtego"},
		{"{{.pequod.global.name}}", "Ishmael"},
		{"{{.pequod.global.subject}}", "Queequeg"},
		{"{{.spouter.global.name}}", "Ishmael"},
		{"{{.spouter.global.harpooner}}", "<no value>"},
	}

	for _, tt := range tests {
		if o, err := ttpl(tt.tpl, v); err != nil || o != tt.expect {
			t.Errorf("Expected %q to expand to %q, got %q", tt.tpl, tt.expect, o)
		}
	}
}

func TestCoalesceTables(t *testing.T) {
	dst := map[string]interface{}{
		"name": "Ishmael",
		"address": map[string]interface{}{
			"street": "123 Spouter Inn Ct.",
			"city":   "Nantucket",
		},
		"details": map[string]interface{}{
			"friends": []string{"Tashtego"},
		},
		"boat": "pequod",
	}
	src := map[string]interface{}{
		"occupation": "whaler",
		"address": map[string]interface{}{
			"state":  "MA",
			"street": "234 Spouter Inn Ct.",
		},
		"details": "empty",
		"boat": map[string]interface{}{
			"mast": true,
		},
	}
	coalesceTables(dst, src)

	if dst["name"] != "Ishmael" {
		t.Errorf("Unexpected name: %s", dst["name"])
	}
	if dst["occupation"] != "whaler" {
		t.Errorf("Unexpected occupation: %s", dst["occupation"])
	}

	addr, ok := dst["address"].(map[string]interface{})
	if !ok {
		t.Fatal("Address went away.")
	}

	if addr["street"].(string) != "234 Spouter Inn Ct." {
		t.Errorf("Unexpected address: %v", addr["street"])
	}

	if addr["city"].(string) != "Nantucket" {
		t.Errorf("Unexpected city: %v", addr["city"])
	}

	if addr["state"].(string) != "MA" {
		t.Errorf("Unexpected state: %v", addr["state"])
	}

	if det, ok := dst["details"].(map[string]interface{}); !ok {
		t.Fatalf("Details is the wrong type: %v", dst["details"])
	} else if _, ok := det["friends"]; !ok {
		t.Error("Could not find your friends. Maybe you don't have any. :-(")
	}

	if dst["boat"].(string) != "pequod" {
		t.Errorf("Expected boat string, got %v", dst["boat"])
	}
}