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bundledata_test.go
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bundledata_test.go
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// Copyright 2014 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package charm_test
import (
"fmt"
"os"
"path/filepath"
"sort"
"strings"
"github.com/juju/mgo/v3/bson"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
"github.com/juju/charm/v12"
)
type bundleDataSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(&bundleDataSuite{})
const mediawikiBundle = `
default-base: ubuntu@20.04
applications:
mediawiki:
charm: "mediawiki"
num_units: 1
expose: true
options:
debug: false
name: Please set name of wiki
skin: vector
annotations:
"gui-x": 609
"gui-y": -15
storage:
valid-store: 10G
bindings:
db: db
website: public
resources:
data: 3
mysql:
charm: "mysql"
num_units: 2
to: [0, mediawiki/0]
base: ubuntu@22.04
options:
"binlog-format": MIXED
"block-size": 5.3
"dataset-size": "80%"
flavor: distro
"ha-bindiface": eth0
"ha-mcastport": 5411.1
annotations:
"gui-x": 610
"gui-y": 255
constraints: "mem=8g"
bindings:
db: db
resources:
data: "resources/data.tar"
relations:
- ["mediawiki:db", "mysql:db"]
- ["mysql:foo", "mediawiki:bar"]
machines:
0:
constraints: 'arch=amd64 mem=4g'
annotations:
foo: bar
tags:
- super
- awesome
description: |
Everything is awesome. Everything is cool when we work as a team.
Lovely day.
`
// Revision are an *int, create a few ints for their addresses used in tests.
var (
five = 5
ten = 10
twentyEight = 28
)
var parseTests = []struct {
about string
data string
expectedBD *charm.BundleData
expectedErr string
}{{
about: "mediawiki",
data: mediawikiBundle,
expectedBD: &charm.BundleData{
DefaultBase: "ubuntu@20.04",
Applications: map[string]*charm.ApplicationSpec{
"mediawiki": {
Charm: "mediawiki",
NumUnits: 1,
Expose: true,
Options: map[string]interface{}{
"debug": false,
"name": "Please set name of wiki",
"skin": "vector",
},
Annotations: map[string]string{
"gui-x": "609",
"gui-y": "-15",
},
Storage: map[string]string{
"valid-store": "10G",
},
EndpointBindings: map[string]string{
"db": "db",
"website": "public",
},
Resources: map[string]interface{}{
"data": 3,
},
},
"mysql": {
Charm: "mysql",
NumUnits: 2,
To: []string{"0", "mediawiki/0"},
Base: "ubuntu@22.04",
Options: map[string]interface{}{
"binlog-format": "MIXED",
"block-size": 5.3,
"dataset-size": "80%",
"flavor": "distro",
"ha-bindiface": "eth0",
"ha-mcastport": 5411.1,
},
Annotations: map[string]string{
"gui-x": "610",
"gui-y": "255",
},
Constraints: "mem=8g",
EndpointBindings: map[string]string{
"db": "db",
},
Resources: map[string]interface{}{"data": "resources/data.tar"},
},
},
Machines: map[string]*charm.MachineSpec{
"0": {
Constraints: "arch=amd64 mem=4g",
Annotations: map[string]string{
"foo": "bar",
},
},
},
Relations: [][]string{
{"mediawiki:db", "mysql:db"},
{"mysql:foo", "mediawiki:bar"},
},
Tags: []string{"super", "awesome"},
Description: `Everything is awesome. Everything is cool when we work as a team.
Lovely day.
`,
},
}, {
about: "relations specified with hyphens",
data: `
relations:
- - "mediawiki:db"
- "mysql:db"
- - "mysql:foo"
- "mediawiki:bar"
`,
expectedBD: &charm.BundleData{
Relations: [][]string{
{"mediawiki:db", "mysql:db"},
{"mysql:foo", "mediawiki:bar"},
},
},
}, {
about: "scale alias for num_units",
data: `
applications:
mysql:
charm: mysql
scale: 1
`,
expectedBD: &charm.BundleData{
Applications: map[string]*charm.ApplicationSpec{
"mysql": {
Charm: "mysql",
NumUnits: 1,
},
},
},
}, {
about: "application requiring explicit trust",
data: `
applications:
aws-integrator:
charm: aws-integrator
num_units: 1
trust: true
`,
expectedBD: &charm.BundleData{
Applications: map[string]*charm.ApplicationSpec{
"aws-integrator": {
Charm: "aws-integrator",
NumUnits: 1,
RequiresTrust: true,
},
},
},
}, {
about: "application defining offers",
data: `
applications:
apache2:
charm: "apache2"
revision: 28
num_units: 1
offers:
offer1:
endpoints:
- "apache-website"
- "apache-proxy"
acl:
admin: "admin"
foo: "consume"
offer2:
endpoints:
- "apache-website"
`,
expectedBD: &charm.BundleData{
Applications: map[string]*charm.ApplicationSpec{
"apache2": {
Charm: "apache2",
Revision: &twentyEight,
NumUnits: 1,
Offers: map[string]*charm.OfferSpec{
"offer1": {
Endpoints: []string{
"apache-website",
"apache-proxy",
},
ACL: map[string]string{
"admin": "admin",
"foo": "consume",
},
},
"offer2": {
Endpoints: []string{
"apache-website",
},
},
},
},
},
},
}, {
about: "saas offerings",
data: `
saas:
apache2:
url: production:admin/info.apache
applications:
apache2:
charm: "apache2"
revision: 10
num_units: 1
`,
expectedBD: &charm.BundleData{
Saas: map[string]*charm.SaasSpec{
"apache2": {
URL: "production:admin/info.apache",
},
},
Applications: map[string]*charm.ApplicationSpec{
"apache2": {
Charm: "apache2",
Revision: &ten,
NumUnits: 1,
},
},
},
}, {
about: "saas offerings with relations",
data: `
saas:
mysql:
url: production:admin/info.mysql
applications:
wordpress:
charm: "ch:wordpress"
series: "trusty"
revision: 10
num_units: 1
relations:
- - wordpress:db
- mysql:db
`,
expectedBD: &charm.BundleData{
Saas: map[string]*charm.SaasSpec{
"mysql": {
URL: "production:admin/info.mysql",
},
},
Applications: map[string]*charm.ApplicationSpec{
"wordpress": {
Charm: "ch:wordpress",
Series: "trusty",
Revision: &ten,
NumUnits: 1,
},
},
Relations: [][]string{
{"wordpress:db", "mysql:db"},
},
},
}, {
about: "charm channel",
data: `
applications:
wordpress:
charm: "wordpress"
revision: 10
series: trusty
channel: edge
num_units: 1
`,
expectedBD: &charm.BundleData{
Applications: map[string]*charm.ApplicationSpec{
"wordpress": {
Charm: "wordpress",
Channel: "edge",
Revision: &ten,
NumUnits: 1,
Series: "trusty",
},
},
},
}, {
about: "charm revision and channel",
data: `
applications:
wordpress:
charm: "wordpress"
revision: 5
channel: edge
num_units: 1
`,
expectedBD: &charm.BundleData{
Applications: map[string]*charm.ApplicationSpec{
"wordpress": {
Charm: "wordpress",
Revision: &five,
Channel: "edge",
NumUnits: 1,
},
},
},
}}
func (*bundleDataSuite) TestParse(c *gc.C) {
for i, test := range parseTests {
c.Logf("test %d: %s", i, test.about)
bd, err := charm.ReadBundleData(strings.NewReader(test.data))
if test.expectedErr != "" {
c.Assert(err, gc.ErrorMatches, test.expectedErr)
continue
}
c.Assert(err, gc.IsNil)
c.Assert(bd, jc.DeepEquals, test.expectedBD)
}
}
func (*bundleDataSuite) TestCodecRoundTrip(c *gc.C) {
for i, test := range parseTests {
if test.expectedErr != "" {
continue
}
// Check that for all the known codecs, we can
// round-trip the bundle data through them.
for _, codec := range codecs {
c.Logf("Code Test %s for test %d: %s", codec.Name, i, test.about)
data, err := codec.Marshal(test.expectedBD)
c.Assert(err, gc.IsNil)
var bd charm.BundleData
err = codec.Unmarshal(data, &bd)
c.Assert(err, gc.IsNil)
for _, app := range bd.Applications {
for resName, res := range app.Resources {
if val, ok := res.(float64); ok {
app.Resources[resName] = int(val)
}
}
}
c.Assert(&bd, jc.DeepEquals, test.expectedBD)
}
}
}
func (*bundleDataSuite) TestParseLocalWithSeries(c *gc.C) {
path := "internal/test-charm-repo/quanta/riak"
data := fmt.Sprintf(`
applications:
dummy:
charm: %s
series: xenial
num_units: 1
`, path)
bd, err := charm.ReadBundleData(strings.NewReader(data))
c.Assert(err, gc.IsNil)
c.Assert(bd, jc.DeepEquals, &charm.BundleData{
Applications: map[string]*charm.ApplicationSpec{
"dummy": {
Charm: path,
Series: "xenial",
NumUnits: 1,
},
}})
}
func (s *bundleDataSuite) TestBSONNilData(c *gc.C) {
bd := map[string]*charm.BundleData{
"test": nil,
}
data, err := bson.Marshal(bd)
c.Assert(err, jc.ErrorIsNil)
var result map[string]*charm.BundleData
err = bson.Unmarshal(data, &result)
c.Assert(err, gc.IsNil)
c.Assert(result["test"], gc.IsNil)
}
var verifyErrorsTests = []struct {
about string
data string
errors []string
}{{
about: "as many errors as possible",
data: `
series: "9wrong"
default-base: "invalidbase"
saas:
apache2:
url: '!some-bogus/url'
riak:
url: production:admin/info.riak
machines:
0:
constraints: 'bad constraints'
annotations:
foo: bar
series: 'bad series'
base: 'bad base'
bogus:
3:
applications:
mediawiki:
charm: "bogus:precise/mediawiki-10"
num_units: -4
options:
debug: false
name: Please set name of wiki
skin: vector
annotations:
"gui-x": 609
"gui-y": -15
resources:
"": 42
"foo":
"not": int
riak:
charm: "./somepath"
mysql:
charm: "mysql"
num_units: 2
to: [0, mediawiki/0, nowhere/3, 2, "bad placement"]
options:
"binlog-format": MIXED
"block-size": 5
"dataset-size": "80%"
flavor: distro
"ha-bindiface": eth0
"ha-mcastport": 5411
annotations:
"gui-x": 610
"gui-y": 255
constraints: "bad constraints"
wordpress:
charm: wordpress
postgres:
charm: "postgres"
series: trusty
terracotta:
charm: "terracotta"
base: "ubuntu@22.04"
ceph:
charm: ceph
storage:
valid-storage: 3,10G
no_underscores: 123
ceph-osd:
charm: ceph-osd
storage:
invalid-storage: "bad storage constraints"
relations:
- ["mediawiki:db", "mysql:db"]
- ["mysql:foo", "mediawiki:bar"]
- ["arble:bar"]
- ["arble:bar", "mediawiki:db"]
- ["mysql:foo", "mysql:bar"]
- ["mysql:db", "mediawiki:db"]
- ["mediawiki/db", "mysql:db"]
- ["wordpress", "mysql"]
- ["wordpress:db", "riak:db"]
`,
errors: []string{
`bundle declares an invalid series "9wrong"`,
`bundle declares an invalid base "invalidbase"`,
`invalid offer URL "!some-bogus/url" for SAAS apache2`,
`invalid storage name "no_underscores" in application "ceph"`,
`invalid storage "invalid-storage" in application "ceph-osd": bad storage constraint`,
`machine "3" is not referred to by a placement directive`,
`machine "bogus" is not referred to by a placement directive`,
`invalid machine id "bogus" found in machines`,
`invalid constraints "bad constraints" in machine "0": bad constraint`,
`invalid charm URL in application "mediawiki": cannot parse URL "bogus:precise/mediawiki-10": schema "bogus" not valid`,
`charm path in application "riak" does not exist: internal/test-charm-repo/bundle/somepath`,
`invalid constraints "bad constraints" in application "mysql": bad constraint`,
`negative number of units specified on application "mediawiki"`,
`missing resource name on application "mediawiki"`,
`resource revision "mediawiki" is not int or string`,
`too many units specified in unit placement for application "mysql"`,
`placement "nowhere/3" refers to an application not defined in this bundle`,
`placement "mediawiki/0" specifies a unit greater than the -4 unit(s) started by the target application`,
`placement "2" refers to a machine not defined in this bundle`,
`relation ["arble:bar"] has 1 endpoint(s), not 2`,
`relation ["arble:bar" "mediawiki:db"] refers to application "arble" not defined in this bundle`,
`relation ["mysql:foo" "mysql:bar"] relates an application to itself`,
`relation ["mysql:db" "mediawiki:db"] is defined more than once`,
`invalid placement syntax "bad placement"`,
`invalid relation syntax "mediawiki/db"`,
`invalid series "bad series" for machine "0"`,
`invalid base "bad base" for machine "0"`,
`ambiguous relation "riak" refers to a application and a SAAS in this bundle`,
`SAAS "riak" already exists with application "riak" name`,
`application "riak" already exists with SAAS "riak" name`,
},
}, {
about: "mediawiki should be ok",
data: mediawikiBundle,
}, {
about: "malformed offer and endpoint names",
data: `
applications:
aws-integrator:
charm: aws-integrator
num_units: 1
trust: true
offers:
$bad-name:
endpoints:
- "nope!"
`,
errors: []string{
`invalid offer name "$bad-name" in application "aws-integrator"`,
`invalid endpoint name "nope!" for offer "$bad-name" in application "aws-integrator"`,
},
}, {
about: "expose parameters provided together with expose:true",
data: `
applications:
aws-integrator:
charm: "aws-integrator"
expose: true
exposed-endpoints:
admin:
expose-to-spaces:
- alpha
expose-to-cidrs:
- 13.37.0.0/16
num_units: 1
`,
errors: []string{
`exposed-endpoints cannot be specified together with "exposed:true" in application "aws-integrator" as this poses a security risk when deploying bundles to older controllers`,
},
}, {
about: "invalid CIDR in expose-to-cidrs parameter when the app is exposed",
data: `
applications:
aws-integrator:
charm: "aws-integrator"
exposed-endpoints:
admin:
expose-to-spaces:
- alpha
expose-to-cidrs:
- not-a-cidr
num_units: 1
`,
errors: []string{
`invalid CIDR "not-a-cidr" for expose to CIDRs field for endpoint "admin" in application "aws-integrator"`,
},
}}
func (*bundleDataSuite) TestVerifyErrors(c *gc.C) {
for i, test := range verifyErrorsTests {
c.Logf("test %d: %s", i, test.about)
assertVerifyErrors(c, test.data, nil, test.errors)
}
}
func assertVerifyErrors(c *gc.C, bundleData string, charms map[string]charm.Charm, expectErrors []string) {
bd, err := charm.ReadBundleData(strings.NewReader(bundleData))
c.Assert(err, gc.IsNil)
validateConstraints := func(c string) error {
if c == "bad constraints" {
return fmt.Errorf("bad constraint")
}
return nil
}
validateStorage := func(c string) error {
if c == "bad storage constraints" {
return fmt.Errorf("bad storage constraint")
}
return nil
}
validateDevices := func(c string) error {
if c == "bad device constraints" {
return fmt.Errorf("bad device constraint")
}
return nil
}
if charms != nil {
err = bd.VerifyWithCharms(validateConstraints, validateStorage, validateDevices, charms)
} else {
err = bd.VerifyLocal("internal/test-charm-repo/bundle", validateConstraints, validateStorage, validateDevices)
}
if len(expectErrors) == 0 {
if err == nil {
return
}
// Let the rest of the function deal with the
// error, so that we'll see the actual errors
// that resulted.
}
c.Assert(err, gc.FitsTypeOf, (*charm.VerificationError)(nil))
errors := err.(*charm.VerificationError).Errors
errStrings := make([]string, len(errors))
for i, err := range errors {
errStrings[i] = err.Error()
}
sort.Strings(errStrings)
sort.Strings(expectErrors)
c.Assert(errStrings, jc.DeepEquals, expectErrors)
}
func (*bundleDataSuite) TestVerifyCharmURL(c *gc.C) {
bd, err := charm.ReadBundleData(strings.NewReader(mediawikiBundle))
c.Assert(err, gc.IsNil)
for i, u := range []string{
"ch:wordpress",
"local:foo",
"local:foo-45",
} {
c.Logf("test %d: %s", i, u)
bd.Applications["mediawiki"].Charm = u
err := bd.Verify(nil, nil, nil)
c.Check(err, gc.IsNil, gc.Commentf("charm url %q", u))
}
}
func (*bundleDataSuite) TestVerifyLocalCharm(c *gc.C) {
bd, err := charm.ReadBundleData(strings.NewReader(mediawikiBundle))
c.Assert(err, gc.IsNil)
bundleDir := c.MkDir()
relativeCharmDir := filepath.Join(bundleDir, "charm")
err = os.MkdirAll(relativeCharmDir, 0700)
c.Assert(err, jc.ErrorIsNil)
for i, u := range []string{
"ch:wordpress",
"local:foo",
"local:foo-45",
c.MkDir(),
"./charm",
} {
c.Logf("test %d: %s", i, u)
bd.Applications["mediawiki"].Charm = u
err := bd.VerifyLocal(bundleDir, nil, nil, nil)
c.Check(err, gc.IsNil, gc.Commentf("charm url %q", u))
}
}
func (s *bundleDataSuite) TestVerifyBundleUsingJujuInfoRelation(c *gc.C) {
err := s.testPrepareAndMutateBeforeVerifyWithCharms(c, nil)
c.Assert(err, gc.IsNil)
}
func (s *bundleDataSuite) testPrepareAndMutateBeforeVerifyWithCharms(c *gc.C, mutator func(bd *charm.BundleData)) error {
b := readBundleDir(c, "wordpress-with-logging")
bd := b.Data()
charms := map[string]charm.Charm{
"ch:wordpress": readCharmDir(c, "wordpress"),
"ch:mysql": readCharmDir(c, "mysql"),
"logging": readCharmDir(c, "logging"),
}
if mutator != nil {
mutator(bd)
}
return bd.VerifyWithCharms(nil, nil, nil, charms)
}
func (s *bundleDataSuite) TestVerifyBundleWithUnknownEndpointBindingGiven(c *gc.C) {
err := s.testPrepareAndMutateBeforeVerifyWithCharms(c, func(bd *charm.BundleData) {
bd.Applications["wordpress"].EndpointBindings["foo"] = "bar"
})
c.Assert(err, gc.ErrorMatches,
`application "wordpress" wants to bind endpoint "foo" to space "bar", `+
`but the endpoint is not defined by the charm`,
)
}
func (s *bundleDataSuite) TestVerifyBundleWithExtraBindingsSuccess(c *gc.C) {
err := s.testPrepareAndMutateBeforeVerifyWithCharms(c, func(bd *charm.BundleData) {
// Both of these are specified in extra-bindings.
bd.Applications["wordpress"].EndpointBindings["admin-api"] = "internal"
bd.Applications["wordpress"].EndpointBindings["foo-bar"] = "test"
})
c.Assert(err, gc.IsNil)
}
func (s *bundleDataSuite) TestVerifyBundleWithRelationNameBindingSuccess(c *gc.C) {
err := s.testPrepareAndMutateBeforeVerifyWithCharms(c, func(bd *charm.BundleData) {
// Both of these are specified in as relations.
bd.Applications["wordpress"].EndpointBindings["cache"] = "foo"
bd.Applications["wordpress"].EndpointBindings["monitoring-port"] = "bar"
})
c.Assert(err, gc.IsNil)
}
func (s *bundleDataSuite) TestParseKubernetesBundleType(c *gc.C) {
data := `
bundle: kubernetes
applications:
mariadb:
charm: "mariadb-k8s"
scale: 2
placement: foo=bar
gitlab:
charm: "gitlab-k8s"
num_units: 3
to: [foo=baz]
series: kubernetes
redis:
charm: "redis-k8s"
scale: 3
to: [foo=baz]
`
bd, err := charm.ReadBundleData(strings.NewReader(data))
c.Assert(err, gc.IsNil)
err = bd.Verify(nil, nil, nil)
c.Assert(err, jc.ErrorIsNil)
c.Assert(bd, jc.DeepEquals, &charm.BundleData{
Type: "kubernetes",
Applications: map[string]*charm.ApplicationSpec{
"mariadb": {
Charm: "mariadb-k8s",
To: []string{"foo=bar"},
NumUnits: 2,
},
"gitlab": {
Charm: "gitlab-k8s",
Series: "kubernetes",
To: []string{"foo=baz"},
NumUnits: 3,
},
"redis": {
Charm: "redis-k8s",
To: []string{"foo=baz"},
NumUnits: 3,
}},
})
}
func (s *bundleDataSuite) TestInvalidBundleType(c *gc.C) {
data := `
bundle: foo
applications:
mariadb:
charm: mariadb-k8s
scale: 2
`
bd, err := charm.ReadBundleData(strings.NewReader(data))
c.Assert(err, gc.IsNil)
err = bd.Verify(nil, nil, nil)
c.Assert(err, gc.ErrorMatches, `bundle has an invalid type "foo"`)
}
func (s *bundleDataSuite) TestInvalidScaleAndNumUnits(c *gc.C) {
data := `
bundle: kubernetes
applications:
mariadb:
charm: "mariadb-k8s"
scale: 2
num_units: 2
`
_, err := charm.ReadBundleData(strings.NewReader(data))
c.Assert(err, gc.ErrorMatches, `.*cannot specify both scale and num_units for application "mariadb"`)
}
func (s *bundleDataSuite) TestInvalidPlacementAndTo(c *gc.C) {
data := `
bundle: kubernetes
applications:
mariadb:
charm: "mariadb-k8s"
placement: foo=bar
to: [foo=bar]
`
_, err := charm.ReadBundleData(strings.NewReader(data))
c.Assert(err, gc.ErrorMatches, `.*cannot specify both placement and to for application "mariadb"`)
}
func (s *bundleDataSuite) TestInvalidIAASPlacement(c *gc.C) {
data := `
applications:
mariadb:
charm: "mariadb"
placement: foo=bar
`
_, err := charm.ReadBundleData(strings.NewReader(data))
c.Assert(err, gc.ErrorMatches, `.*placement \(foo=bar\) not valid for non-Kubernetes application "mariadb"`)
}
func (s *bundleDataSuite) TestKubernetesBundleErrors(c *gc.C) {
data := `
bundle: "kubernetes"
series: "xenial"
machines:
0:
applications:
mariadb:
charm: "mariadb-k8s"
series: "xenial"
scale: 2
casandra:
charm: "casnadra-k8s"
to: ["foo=bar", "foo=baz"]
hadoop:
charm: "hadoop-k8s"
to: ["foo"]
`
errors := []string{
`expected "key=value", got "foo" for application "hadoop"`,
`bundle machines not valid for Kubernetes bundles`,
`too many placement directives for application "casandra"`,
}
assertVerifyErrors(c, data, nil, errors)
}
func (*bundleDataSuite) TestRequiredCharms(c *gc.C) {
bd, err := charm.ReadBundleData(strings.NewReader(mediawikiBundle))
c.Assert(err, gc.IsNil)
reqCharms := bd.RequiredCharms()
c.Assert(reqCharms, gc.DeepEquals, []string{"mediawiki", "mysql"})
}
// testCharm returns a charm with the given name
// and relations. The relations are specified as
// a string of the form:
//
// <provides-relations> | <requires-relations>
//
// Within each section, each white-space separated
// relation is specified as:
// / <relation-name>:<interface>
//
// So, for example:
//
// testCharm("wordpress", "web:http | db:mysql")
//
// is equivalent to a charm with metadata.yaml containing
//
// name: wordpress
// description: wordpress
// provides:
// web:
// interface: http
// requires:
// db:
// interface: mysql
//
// If the charm name has a "-sub" suffix, the
// returned charm will have Meta.Subordinate = true.
func testCharm(name string, relations string) charm.Charm {
var provides, requires string
parts := strings.Split(relations, "|")
provides = parts[0]
if len(parts) > 1 {
requires = parts[1]
}
meta := &charm.Meta{
Name: name,
Summary: name,
Description: name,
Provides: parseRelations(provides, charm.RoleProvider),
Requires: parseRelations(requires, charm.RoleRequirer),
}
if strings.HasSuffix(name, "-sub") {
meta.Subordinate = true
}
configStr := `
options:
title: {default: My Title, description: title, type: string}
skill-level: {description: skill, type: int}
`
config, err := charm.ReadConfig(strings.NewReader(configStr))
if err != nil {
panic(err)
}
return testCharmImpl{
meta: meta,
config: config,
}
}
func parseRelations(s string, role charm.RelationRole) map[string]charm.Relation {
rels := make(map[string]charm.Relation)
for _, r := range strings.Fields(s) {
parts := strings.Split(r, ":")
if len(parts) != 2 {
panic(fmt.Errorf("invalid relation specifier %q", r))
}
name, interf := parts[0], parts[1]
rels[name] = charm.Relation{
Name: name,
Role: role,
Interface: interf,
Scope: charm.ScopeGlobal,
}
}
return rels
}
type testCharmImpl struct {
meta *charm.Meta
config *charm.Config
// Implement charm.Charm, but panic if anything other than
// Meta or Config methods are called.
charm.Charm
}
func (c testCharmImpl) Meta() *charm.Meta {
return c.meta
}
func (c testCharmImpl) Config() *charm.Config {
return c.config
}
var verifyWithCharmsErrorsTests = []struct {
about string
data string
charms map[string]charm.Charm
errors []string
}{{
about: "no charms",
data: mediawikiBundle,
charms: map[string]charm.Charm{},
errors: []string{
`application "mediawiki" refers to non-existent charm "mediawiki"`,
`application "mysql" refers to non-existent charm "mysql"`,
},
}, {
about: "all present and correct",
data: `