mirror of https://github.com/helm/helm
Merge pull request #4070 from adamreese/dev-v3-arg-validation
ref(cmd): refactor argument validationpull/4071/head
Adam Reese
7 years ago
committed by
GitHub
commit
9b6f674b38
@ -0,0 +1,88 @@
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/*
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Copyright 2018 The Kubernetes Authors All rights reserved.
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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 require
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import (
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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// NoArgs returns an error if any args are included.
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func NoArgs(cmd *cobra.Command, args []string) error {
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if len(args) > 0 {
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return errors.Errorf(
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"%q accepts no arguments\n\nUsage: %s",
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cmd.CommandPath(),
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cmd.UseLine(),
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)
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}
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return nil
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}
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// ExactArgs returns an error if there are not exactly n args.
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func ExactArgs(n int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) != n {
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return errors.Errorf(
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"%q requires %d %s\n\nUsage: %s",
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cmd.CommandPath(),
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n,
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pluralize("argument", n),
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cmd.UseLine(),
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)
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}
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return nil
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}
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}
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// MaximumNArgs returns an error if there are more than N args.
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func MaximumNArgs(n int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) > n {
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return errors.Errorf(
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"%q accepts at most %d %s\n\nUsage: %s",
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cmd.CommandPath(),
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n,
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pluralize("argument", n),
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cmd.UseLine(),
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)
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}
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return nil
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}
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}
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// MinimumNArgs returns an error if there is not at least N args.
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func MinimumNArgs(n int) cobra.PositionalArgs {
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return func(cmd *cobra.Command, args []string) error {
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if len(args) < n {
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return errors.Errorf(
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"%q requires at least %d %s\n\nUsage: %s",
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cmd.CommandPath(),
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n,
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pluralize("argument", n),
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cmd.UseLine(),
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)
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}
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return nil
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}
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}
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func pluralize(word string, n int) string {
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if n == 1 {
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return word
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}
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return word + "s"
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}
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@ -0,0 +1,91 @@
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/*
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Copyright 2018 The Kubernetes Authors All rights reserved.
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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 require
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import (
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"fmt"
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"io/ioutil"
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"strings"
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"testing"
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"github.com/spf13/cobra"
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)
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func TestArgs(t *testing.T) {
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runTestCases(t, []testCase{{
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validateFunc: NoArgs,
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}, {
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args: []string{"one"},
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validateFunc: NoArgs,
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wantError: `"root" accepts no arguments`,
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}, {
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args: []string{"one"},
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validateFunc: ExactArgs(1),
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}, {
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validateFunc: ExactArgs(1),
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wantError: `"root" requires 1 argument`,
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}, {
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validateFunc: ExactArgs(2),
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wantError: `"root" requires 2 arguments`,
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}, {
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args: []string{"one"},
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validateFunc: MaximumNArgs(1),
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}, {
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args: []string{"one", "two"},
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validateFunc: MaximumNArgs(1),
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wantError: `"root" accepts at most 1 argument`,
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}, {
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validateFunc: MinimumNArgs(1),
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wantError: `"root" requires at least 1 argument`,
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}, {
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args: []string{"one", "two"},
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validateFunc: MinimumNArgs(1),
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}})
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}
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type testCase struct {
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args []string
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validateFunc cobra.PositionalArgs
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wantError string
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}
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func runTestCases(t *testing.T, testCases []testCase) {
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for i, tc := range testCases {
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t.Run(fmt.Sprint(i), func(t *testing.T) {
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cmd := &cobra.Command{
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Use: "root",
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Run: func(*cobra.Command, []string) {},
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Args: tc.validateFunc,
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}
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cmd.SetArgs(tc.args)
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cmd.SetOutput(ioutil.Discard)
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err := cmd.Execute()
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if tc.wantError == "" {
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if err != nil {
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t.Fatalf("unexpected error, got '%v'", err)
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}
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return
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}
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if !strings.Contains(err.Error(), tc.wantError) {
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t.Fatalf("unexpected error \n\nWANT:\n%q\n\nGOT:\n%q\n", tc.wantError, err)
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}
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if !strings.Contains(err.Error(), "Usage:") {
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t.Fatalf("unexpected error: want Usage string\n\nGOT:\n%q\n", err)
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}
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})
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}
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}
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@ -1 +1,3 @@
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Error: command 'delete' requires a release name
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Error: "helm delete" requires at least 1 argument
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Usage: helm delete RELEASE_NAME [...] [flags]
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@ -1 +1,3 @@
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Error: release name is required
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Error: "helm get hooks" requires 1 argument
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Usage: helm get hooks RELEASE_NAME [flags]
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@ -1 +1,3 @@
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Error: release name is required
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Error: "helm get manifest" requires 1 argument
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Usage: helm get manifest RELEASE_NAME [flags]
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@ -1 +1,3 @@
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Error: release name is required
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Error: "helm get" requires 1 argument
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Usage: helm get RELEASE_NAME [flags]
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@ -1 +1,3 @@
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Error: release name is required
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Error: "helm get values" requires 1 argument
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Usage: helm get values RELEASE_NAME [flags]
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@ -1 +1,3 @@
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Error: this command needs 1 argument: chart name
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Error: "helm install" requires 1 argument
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Usage: helm install [CHART] [flags]
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@ -1 +1,3 @@
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Error: this command needs 2 arguments: release name, revision number
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Error: "helm rollback" requires 2 arguments
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Usage: helm rollback [RELEASE] [REVISION] [flags]
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@ -1 +1,3 @@
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Error: this command needs 2 arguments: release name, chart path
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Error: "helm upgrade" requires 2 arguments
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Usage: helm upgrade [RELEASE] [CHART] [flags]
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