terraform/internal/providercache/installer_events_test.go

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package providercache
import (
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/internal/getproviders"
)
type testInstallerEventLogItem struct {
// The name of the event that occurred, using the same names as the
// fields of InstallerEvents.
Event string
// Most events relate to a specific provider. For the few event types
// that don't, this will be a zero-value Provider.
Provider addrs.Provider
// The type of Args will vary by event, but it should always be something
// that can be deterministically compared using the go-cmp package.
Args interface{}
}
// installerLogEventsForTests is a test helper that produces an InstallerEvents
// that writes event notifications (*testInstallerEventLogItem values) to
// the given channel as they occur.
//
// The caller must keep reading from the read side of the given channel
// throughout any installer operation using the returned InstallerEvents.
// It's the caller's responsibility to close the channel if needed and
// clean up any goroutines it started to process the events.
//
// The exact sequence of events emitted for an installer operation might
// change in future, if e.g. we introduce new event callbacks to the
// InstallerEvents struct. Tests using this mechanism may therefore need to
// be updated to reflect such changes.
//
// (The channel-based approach here is so that the control flow for event
// processing will belong to the caller and thus it can safely use its
// testing.T object(s) to emit log lines without non-test-case frames in the
// call stack.)
func installerLogEventsForTests(into chan<- *testInstallerEventLogItem) *InstallerEvents {
return &InstallerEvents{
PendingProviders: func(reqs map[addrs.Provider]getproviders.VersionConstraints) {
into <- &testInstallerEventLogItem{
Event: "PendingProviders",
Args: reqs,
}
},
ProviderAlreadyInstalled: func(provider addrs.Provider, selectedVersion getproviders.Version) {
into <- &testInstallerEventLogItem{
Event: "ProviderAlreadyInstalled",
Provider: provider,
Args: selectedVersion,
}
},
BuiltInProviderAvailable: func(provider addrs.Provider) {
into <- &testInstallerEventLogItem{
Event: "BuiltInProviderAvailable",
Provider: provider,
}
},
BuiltInProviderFailure: func(provider addrs.Provider, err error) {
into <- &testInstallerEventLogItem{
Event: "BuiltInProviderFailure",
Provider: provider,
Args: err.Error(), // stringified to guarantee cmp-ability
}
},
QueryPackagesBegin: func(provider addrs.Provider, versionConstraints getproviders.VersionConstraints, locked bool) {
into <- &testInstallerEventLogItem{
Event: "QueryPackagesBegin",
Provider: provider,
Args: struct {
Constraints string
Locked bool
}{getproviders.VersionConstraintsString(versionConstraints), locked},
}
},
QueryPackagesSuccess: func(provider addrs.Provider, selectedVersion getproviders.Version) {
into <- &testInstallerEventLogItem{
Event: "QueryPackagesSuccess",
Provider: provider,
Args: selectedVersion.String(),
}
},
QueryPackagesFailure: func(provider addrs.Provider, err error) {
into <- &testInstallerEventLogItem{
Event: "QueryPackagesFailure",
Provider: provider,
Args: err.Error(), // stringified to guarantee cmp-ability
}
},
QueryPackagesWarning: func(provider addrs.Provider, warns []string) {
into <- &testInstallerEventLogItem{
Event: "QueryPackagesWarning",
Provider: provider,
Args: warns,
}
},
LinkFromCacheBegin: func(provider addrs.Provider, version getproviders.Version, cacheRoot string) {
into <- &testInstallerEventLogItem{
Event: "LinkFromCacheBegin",
Provider: provider,
Args: struct {
Version string
CacheRoot string
}{version.String(), cacheRoot},
}
},
LinkFromCacheSuccess: func(provider addrs.Provider, version getproviders.Version, localDir string) {
into <- &testInstallerEventLogItem{
Event: "LinkFromCacheSuccess",
Provider: provider,
Args: struct {
Version string
LocalDir string
}{version.String(), localDir},
}
},
LinkFromCacheFailure: func(provider addrs.Provider, version getproviders.Version, err error) {
into <- &testInstallerEventLogItem{
Event: "LinkFromCacheFailure",
Provider: provider,
Args: struct {
Version string
Error string
}{version.String(), err.Error()},
}
},
FetchPackageMeta: func(provider addrs.Provider, version getproviders.Version) {
into <- &testInstallerEventLogItem{
Event: "FetchPackageMeta",
Provider: provider,
Args: version.String(),
}
},
FetchPackageBegin: func(provider addrs.Provider, version getproviders.Version, location getproviders.PackageLocation) {
into <- &testInstallerEventLogItem{
Event: "FetchPackageBegin",
Provider: provider,
Args: struct {
Version string
Location getproviders.PackageLocation
}{version.String(), location},
}
},
FetchPackageSuccess: func(provider addrs.Provider, version getproviders.Version, localDir string, authResult *getproviders.PackageAuthenticationResult) {
into <- &testInstallerEventLogItem{
Event: "FetchPackageSuccess",
Provider: provider,
Args: struct {
Version string
LocalDir string
AuthResult string
}{version.String(), localDir, authResult.String()},
}
},
FetchPackageFailure: func(provider addrs.Provider, version getproviders.Version, err error) {
into <- &testInstallerEventLogItem{
Event: "FetchPackageFailure",
Provider: provider,
Args: struct {
Version string
Error string
}{version.String(), err.Error()},
}
},
ProvidersFetched: func(authResults map[addrs.Provider]*getproviders.PackageAuthenticationResult) {
into <- &testInstallerEventLogItem{
Event: "ProvidersFetched",
Args: authResults,
}
},
HashPackageFailure: func(provider addrs.Provider, version getproviders.Version, err error) {
into <- &testInstallerEventLogItem{
Event: "HashPackageFailure",
Provider: provider,
Args: struct {
Version string
Error string
}{version.String(), err.Error()},
}
},
}
}