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423 lines
12 KiB
423 lines
12 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package engine
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import (
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"math"
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"strings"
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"testing"
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"text/template"
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"time"
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"github.com/stretchr/testify/assert"
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)
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func TestFuncs(t *testing.T) {
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//TODO write tests for failure cases
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tests := []struct {
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tpl, expect string
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vars interface{}
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}{{
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tpl: `{{ toYaml . }}`,
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expect: `foo: bar`,
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vars: map[string]interface{}{"foo": "bar"},
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}, {
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tpl: `{{ toYamlPretty . }}`,
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expect: "baz:\n - 1\n - 2\n - 3",
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vars: map[string]interface{}{"baz": []int{1, 2, 3}},
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}, {
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tpl: `{{ toToml . }}`,
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expect: "foo = \"bar\"\n",
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vars: map[string]interface{}{"foo": "bar"},
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}, {
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tpl: `{{ fromToml . }}`,
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expect: "map[hello:world]",
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vars: `hello = "world"`,
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}, {
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tpl: `{{ fromToml . }}`,
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expect: "map[table:map[keyInTable:valueInTable subtable:map[keyInSubtable:valueInSubTable]]]",
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vars: `
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[table]
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keyInTable = "valueInTable"
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[table.subtable]
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keyInSubtable = "valueInSubTable"`,
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}, {
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tpl: `{{ fromToml . }}`,
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expect: "map[tableArray:[map[keyInElement0:valueInElement0] map[keyInElement1:valueInElement1]]]",
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vars: `
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[[tableArray]]
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keyInElement0 = "valueInElement0"
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[[tableArray]]
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keyInElement1 = "valueInElement1"`,
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}, {
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tpl: `{{ fromToml . }}`,
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expect: "map[Error:toml: line 1: unexpected EOF; expected key separator '=']",
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vars: "one",
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}, {
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tpl: `{{ toJson . }}`,
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expect: `{"foo":"bar"}`,
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vars: map[string]interface{}{"foo": "bar"},
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}, {
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tpl: `{{ fromYaml . }}`,
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expect: "map[hello:world]",
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vars: `hello: world`,
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}, {
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tpl: `{{ fromYamlArray . }}`,
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expect: "[one 2 map[name:helm]]",
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vars: "- one\n- 2\n- name: helm\n",
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}, {
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tpl: `{{ fromYamlArray . }}`,
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expect: "[one 2 map[name:helm]]",
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vars: `["one", 2, { "name": "helm" }]`,
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}, {
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// Regression for https://github.com/helm/helm/issues/2271
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tpl: `{{ toToml . }}`,
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expect: "[mast]\n sail = \"white\"\n",
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vars: map[string]map[string]string{"mast": {"sail": "white"}},
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}, {
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tpl: `{{ fromYaml . }}`,
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expect: "map[Error:error unmarshaling JSON: while decoding JSON: json: cannot unmarshal array into Go value of type map[string]interface {}]",
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vars: "- one\n- two\n",
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}, {
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tpl: `{{ fromJson .}}`,
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expect: `map[hello:world]`,
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vars: `{"hello":"world"}`,
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}, {
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tpl: `{{ fromJson . }}`,
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expect: `map[Error:json: cannot unmarshal array into Go value of type map[string]interface {}]`,
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vars: `["one", "two"]`,
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}, {
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tpl: `{{ fromJsonArray . }}`,
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expect: `[one 2 map[name:helm]]`,
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vars: `["one", 2, { "name": "helm" }]`,
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}, {
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tpl: `{{ fromJsonArray . }}`,
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expect: `[json: cannot unmarshal object into Go value of type []interface {}]`,
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vars: `{"hello": "world"}`,
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}, {
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tpl: `{{ merge .dict (fromYaml .yaml) }}`,
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expect: `map[a:map[b:c]]`,
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vars: map[string]interface{}{"dict": map[string]interface{}{"a": map[string]interface{}{"b": "c"}}, "yaml": `{"a":{"b":"d"}}`},
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}, {
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tpl: `{{ merge (fromYaml .yaml) .dict }}`,
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expect: `map[a:map[b:d]]`,
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vars: map[string]interface{}{"dict": map[string]interface{}{"a": map[string]interface{}{"b": "c"}}, "yaml": `{"a":{"b":"d"}}`},
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}, {
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tpl: `{{ fromYaml . }}`,
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expect: `map[Error:error unmarshaling JSON: while decoding JSON: json: cannot unmarshal array into Go value of type map[string]interface {}]`,
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vars: `["one", "two"]`,
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}, {
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tpl: `{{ fromYamlArray . }}`,
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expect: `[error unmarshaling JSON: while decoding JSON: json: cannot unmarshal object into Go value of type []interface {}]`,
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vars: `hello: world`,
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}, {
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// This should never result in a network lookup. Regression for #7955
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tpl: `{{ lookup "v1" "Namespace" "" "unlikelynamespace99999999" }}`,
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expect: `map[]`,
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vars: `["one", "two"]`,
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}}
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for _, tt := range tests {
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var b strings.Builder
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err := template.Must(template.New("test").Funcs(funcMap()).Parse(tt.tpl)).Execute(&b, tt.vars)
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assert.NoError(t, err)
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assert.Equal(t, tt.expect, b.String(), tt.tpl)
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}
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loopMap := map[string]interface{}{
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"foo": "bar",
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}
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loopMap["loop"] = []interface{}{loopMap}
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mustFuncsTests := []struct {
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tpl string
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expect interface{}
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vars interface{}
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}{{
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tpl: `{{ mustToYaml . }}`,
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vars: loopMap,
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}, {
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tpl: `{{ mustToJson . }}`,
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vars: loopMap,
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}, {
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tpl: `{{ mustToDuration 30 }}`,
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expect: `30s`,
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vars: nil,
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}, {
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tpl: `{{ mustToDuration "1m30s" }}`,
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expect: `1m30s`,
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vars: nil,
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}, {
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tpl: `{{ mustToDuration "foo" }}`,
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vars: nil,
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}, {
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tpl: `{{ toYaml . }}`,
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expect: "", // should return empty string and swallow error
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vars: loopMap,
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}, {
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tpl: `{{ toJson . }}`,
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expect: "", // should return empty string and swallow error
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vars: loopMap,
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},
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}
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for _, tt := range mustFuncsTests {
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var b strings.Builder
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err := template.Must(template.New("test").Funcs(funcMap()).Parse(tt.tpl)).Execute(&b, tt.vars)
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if tt.expect != nil {
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assert.NoError(t, err)
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assert.Equal(t, tt.expect, b.String(), tt.tpl)
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} else {
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assert.Error(t, err)
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}
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}
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}
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func TestDurationHelpers(t *testing.T) {
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tests := []struct {
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name string
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tpl string
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vars interface{}
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expect string
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}{{
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name: "toSeconds parses duration string",
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tpl: `{{ toSeconds "1m30s" }}`,
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expect: `90`,
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}, {
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name: "toSeconds parses numeric string as seconds",
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tpl: `{{ toSeconds "2.5" }}`,
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expect: `2.5`,
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}, {
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name: "toSeconds trims whitespace around numeric string",
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tpl: `{{ toSeconds " 2.5 " }}`,
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expect: `2.5`,
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}, {
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name: "toSeconds int treated as seconds",
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tpl: `{{ toSeconds 2 }}`,
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expect: `2`,
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}, {
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name: "toSeconds float treated as seconds",
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tpl: `{{ toSeconds 2.5 }}`,
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expect: `2.5`,
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}, {
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name: "toSeconds uint treated as seconds",
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tpl: `{{ toSeconds . }}`,
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vars: uint(2),
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expect: `2`,
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}, {
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name: "toSeconds time.Duration passthrough",
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tpl: `{{ toSeconds . }}`,
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vars: 1500 * time.Millisecond,
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expect: `1.5`,
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}, {
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name: "invalid duration string returns 0",
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tpl: `{{ toSeconds "nope" }}`,
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expect: `0`,
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}, {
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name: "empty duration string returns 0",
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tpl: `{{ toSeconds "" }}`,
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expect: `0`,
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}, {
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name: "whitespace-only duration string returns 0",
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tpl: `{{ toSeconds " " }}`,
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expect: `0`,
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}, {
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name: "nil returns 0",
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tpl: `{{ toSeconds . }}`,
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vars: nil,
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expect: `0`,
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}, {
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name: "toSeconds uint overflow returns 0",
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tpl: `{{ toSeconds . }}`,
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vars: uint64(math.MaxInt64) + 1,
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expect: `0`,
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}, {
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name: "toMilliseconds int seconds",
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tpl: `{{ toMilliseconds 2 }}`,
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expect: `2000`,
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}, {
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name: "toMilliseconds float seconds",
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tpl: `{{ toMilliseconds 1.5 }}`,
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expect: `1500`,
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}, {
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name: "toMicroseconds int seconds",
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tpl: `{{ toMicroseconds 2 }}`,
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expect: `2000000`,
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}, {
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name: "toNanoseconds int seconds",
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tpl: `{{ toNanoseconds 2 }}`,
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expect: `2000000000`,
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}, {
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name: "toMinutes parses duration string",
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tpl: `{{ toMinutes "90s" }}`,
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expect: `1.5`,
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}, {
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name: "toHours parses duration string",
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tpl: `{{ toHours "90m" }}`,
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expect: `1.5`,
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}, {
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name: "toDays parses duration string",
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tpl: `{{ toDays "36h" }}`,
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expect: `1.5`,
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}, {
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name: "toDays numeric seconds",
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tpl: `{{ toDays 86400 }}`,
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expect: `1`,
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}, {
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name: "roundToDuration numeric seconds",
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tpl: `{{ roundToDuration 93 60 }}`, // 93s rounded to 60s = 120s
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expect: `2m0s`,
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}, {
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name: "truncateToDuration numeric seconds",
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tpl: `{{ truncateToDuration 93 60 }}`, // 93s truncated to 60s = 60s
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expect: `1m0s`,
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}, {
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name: "roundToDuration accepts duration-string multiplier",
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tpl: `{{ roundToDuration "93s" "1m" }}`,
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expect: `2m0s`,
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}, {
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name: "truncateToDuration accepts duration-string multiplier",
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tpl: `{{ truncateToDuration "93s" "1m" }}`,
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expect: `1m0s`,
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}, {
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name: "roundToDuration invalid m returns v unchanged",
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tpl: `{{ roundToDuration "93s" "nope" }}`,
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expect: `1m33s`,
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}, {
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name: "truncateToDuration invalid m returns v unchanged",
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tpl: `{{ truncateToDuration "93s" "nope" }}`,
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expect: `1m33s`,
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}, {
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name: "roundToDuration zero m returns v unchanged",
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tpl: `{{ roundToDuration "93s" 0 }}`,
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expect: `1m33s`,
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}, {
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name: "truncateToDuration negative m returns v unchanged",
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tpl: `{{ truncateToDuration "93s" -1 }}`,
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expect: `1m33s`,
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}}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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var b strings.Builder
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err := template.Must(template.New("test").Funcs(funcMap()).Parse(tt.tpl)).Execute(&b, tt.vars)
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assert.NoError(t, err, tt.tpl)
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assert.Equal(t, tt.expect, b.String(), tt.tpl)
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})
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}
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mustErrTests := []struct {
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name string
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tpl string
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vars interface{}
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}{{
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name: "mustToDuration invalid string",
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tpl: `{{ mustToDuration "nope" }}`,
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}, {
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name: "mustToDuration empty string",
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tpl: `{{ mustToDuration "" }}`,
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}, {
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name: "mustToDuration whitespace string",
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tpl: `{{ mustToDuration " " }}`,
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}, {
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name: "mustToDuration unsupported type",
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tpl: `{{ mustToDuration . }}`,
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vars: []int{1, 2, 3},
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}, {
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name: "mustToDuration uint overflow",
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tpl: `{{ mustToDuration . }}`,
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vars: uint64(math.MaxInt64) + 1,
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},
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}
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for _, tt := range mustErrTests {
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t.Run(tt.name, func(t *testing.T) {
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var b strings.Builder
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err := template.Must(template.New("test").Funcs(funcMap()).Parse(tt.tpl)).Execute(&b, tt.vars)
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assert.Error(t, err, tt.tpl)
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})
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}
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}
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// This test to check a function provided by sprig is due to a change in a
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// dependency of sprig. mergo in v0.3.9 changed the way it merges and only does
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// public fields (i.e. those starting with a capital letter). This test, from
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// sprig, fails in the new version. This is a behavior change for mergo that
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// impacts sprig and Helm users. This test will help us to not update to a
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// version of mergo (even accidentally) that causes a breaking change. See
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// sprig changelog and notes for more details.
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// Note, Go modules assume semver is never broken. So, there is no way to tell
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// the tooling to not update to a minor or patch version. `go install` could
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// be used to accidentally update mergo. This test and message should catch
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// the problem and explain why it's happening.
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func TestMerge(t *testing.T) {
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dict := map[string]interface{}{
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"src2": map[string]interface{}{
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"h": 10,
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"i": "i",
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"j": "j",
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},
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"src1": map[string]interface{}{
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"a": 1,
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"b": 2,
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"d": map[string]interface{}{
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"e": "four",
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},
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"g": []int{6, 7},
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"i": "aye",
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"j": "jay",
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"k": map[string]interface{}{
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"l": false,
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},
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},
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"dst": map[string]interface{}{
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"a": "one",
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"c": 3,
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"d": map[string]interface{}{
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"f": 5,
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},
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"g": []int{8, 9},
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"i": "eye",
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"k": map[string]interface{}{
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"l": true,
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},
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},
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}
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tpl := `{{merge .dst .src1 .src2}}`
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var b strings.Builder
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err := template.Must(template.New("test").Funcs(funcMap()).Parse(tpl)).Execute(&b, dict)
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assert.NoError(t, err)
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expected := map[string]interface{}{
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"a": "one", // key overridden
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"b": 2, // merged from src1
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"c": 3, // merged from dst
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"d": map[string]interface{}{ // deep merge
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"e": "four",
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"f": 5,
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},
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"g": []int{8, 9}, // overridden - arrays are not merged
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"h": 10, // merged from src2
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"i": "eye", // overridden twice
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"j": "jay", // overridden and merged
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"k": map[string]interface{}{
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"l": true, // overridden
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},
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}
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assert.Equal(t, expected, dict["dst"])
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}
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