opentofu/internal/tofu/provider_for_test_framework.go
Oleksandr Levchenkov 9d9a7aab06
add mock providers for testing framework (#1772)
Signed-off-by: ollevche <ollevche@gmail.com>
2024-07-09 14:41:52 +03:00

208 lines
6.7 KiB
Go

// Copyright (c) The OpenTofu Authors
// SPDX-License-Identifier: MPL-2.0
// Copyright (c) 2023 HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package tofu
import (
"fmt"
"hash/fnv"
"github.com/opentofu/opentofu/internal/addrs"
"github.com/opentofu/opentofu/internal/configs"
"github.com/opentofu/opentofu/internal/configs/hcl2shim"
"github.com/opentofu/opentofu/internal/providers"
"github.com/zclconf/go-cty/cty"
)
var _ providers.Interface = &providerForTest{}
// providerForTest is a wrapper around a real provider to allow certain resources to be overridden
// (by address) or mocked (by provider and resource type) for testing framework.
type providerForTest struct {
// providers.Interface is not embedded to make it safer to extend
// the interface without silently breaking providerForTest functionality.
internal providers.Interface
schema providers.ProviderSchema
managedResources resourceForTestByType
dataResources resourceForTestByType
}
func newProviderForTestWithSchema(internal providers.Interface, schema providers.ProviderSchema) *providerForTest {
return &providerForTest{
internal: internal,
schema: schema,
managedResources: make(resourceForTestByType),
dataResources: make(resourceForTestByType),
}
}
func newProviderForTest(internal providers.Interface, res []*configs.MockResource) (providers.Interface, error) {
schema := internal.GetProviderSchema()
if schema.Diagnostics.HasErrors() {
return nil, fmt.Errorf("getting provider schema for test wrapper: %w", schema.Diagnostics.Err())
}
p := newProviderForTestWithSchema(internal, schema)
p.addMockResources(res)
return p, nil
}
func (p *providerForTest) ReadResource(r providers.ReadResourceRequest) providers.ReadResourceResponse {
var resp providers.ReadResourceResponse
resSchema, _ := p.schema.SchemaForResourceType(addrs.ManagedResourceMode, r.TypeName)
overrideValues := p.managedResources.getOverrideValues(r.TypeName)
resp.NewState, resp.Diagnostics = newMockValueComposer(r.TypeName).
ComposeBySchema(resSchema, r.ProviderMeta, overrideValues)
return resp
}
func (p *providerForTest) PlanResourceChange(r providers.PlanResourceChangeRequest) providers.PlanResourceChangeResponse {
if r.Config.IsNull() {
return providers.PlanResourceChangeResponse{
PlannedState: r.ProposedNewState, // null
}
}
resSchema, _ := p.schema.SchemaForResourceType(addrs.ManagedResourceMode, r.TypeName)
overrideValues := p.managedResources.getOverrideValues(r.TypeName)
var resp providers.PlanResourceChangeResponse
resp.PlannedState, resp.Diagnostics = newMockValueComposer(r.TypeName).
ComposeBySchema(resSchema, r.Config, overrideValues)
return resp
}
func (p *providerForTest) ApplyResourceChange(r providers.ApplyResourceChangeRequest) providers.ApplyResourceChangeResponse {
return providers.ApplyResourceChangeResponse{
NewState: r.PlannedState,
}
}
func (p *providerForTest) ReadDataSource(r providers.ReadDataSourceRequest) providers.ReadDataSourceResponse {
resSchema, _ := p.schema.SchemaForResourceType(addrs.DataResourceMode, r.TypeName)
var resp providers.ReadDataSourceResponse
overrideValues := p.dataResources.getOverrideValues(r.TypeName)
resp.State, resp.Diagnostics = newMockValueComposer(r.TypeName).
ComposeBySchema(resSchema, r.Config, overrideValues)
return resp
}
// Calling the internal provider ensures providerForTest has the same behaviour as if
// it wasn't overridden or mocked. The only exception is ImportResourceState, which panics
// if called via providerForTest because importing is not supported in testing framework.
func (p *providerForTest) GetProviderSchema() providers.GetProviderSchemaResponse {
return p.internal.GetProviderSchema()
}
func (p *providerForTest) ValidateProviderConfig(r providers.ValidateProviderConfigRequest) providers.ValidateProviderConfigResponse {
return p.internal.ValidateProviderConfig(r)
}
func (p *providerForTest) ValidateResourceConfig(r providers.ValidateResourceConfigRequest) providers.ValidateResourceConfigResponse {
return p.internal.ValidateResourceConfig(r)
}
func (p *providerForTest) ValidateDataResourceConfig(r providers.ValidateDataResourceConfigRequest) providers.ValidateDataResourceConfigResponse {
return p.internal.ValidateDataResourceConfig(r)
}
func (p *providerForTest) UpgradeResourceState(r providers.UpgradeResourceStateRequest) providers.UpgradeResourceStateResponse {
return p.internal.UpgradeResourceState(r)
}
// providerForTest doesn't configure its internal provider because it is mocked.
func (p *providerForTest) ConfigureProvider(_ providers.ConfigureProviderRequest) providers.ConfigureProviderResponse {
return providers.ConfigureProviderResponse{}
}
func (p *providerForTest) Stop() error {
return p.internal.Stop()
}
func (p *providerForTest) GetFunctions() providers.GetFunctionsResponse {
return p.internal.GetFunctions()
}
func (p *providerForTest) CallFunction(r providers.CallFunctionRequest) providers.CallFunctionResponse {
return p.internal.CallFunction(r)
}
func (p *providerForTest) Close() error {
return p.internal.Close()
}
func (p *providerForTest) ImportResourceState(providers.ImportResourceStateRequest) providers.ImportResourceStateResponse {
panic("Importing is not supported in testing context. providerForTest must not be used to call ImportResourceState")
}
func (p *providerForTest) setSingleResource(addr addrs.Resource, overrides map[string]cty.Value) {
res := resourceForTest{
overrideValues: overrides,
}
switch addr.Mode {
case addrs.ManagedResourceMode:
p.managedResources[addr.Type] = res
case addrs.DataResourceMode:
p.dataResources[addr.Type] = res
case addrs.InvalidResourceMode:
panic("BUG: invalid mock resource mode")
default:
panic("BUG: unsupported resource mode: " + addr.Mode.String())
}
}
func (p *providerForTest) addMockResources(mockResources []*configs.MockResource) {
for _, mockRes := range mockResources {
var resources resourceForTestByType
switch mockRes.Mode {
case addrs.ManagedResourceMode:
resources = p.managedResources
case addrs.DataResourceMode:
resources = p.dataResources
case addrs.InvalidResourceMode:
panic("BUG: invalid mock resource mode")
default:
panic("BUG: unsupported mock resource mode: " + mockRes.Mode.String())
}
resources[mockRes.Type] = resourceForTest{
overrideValues: mockRes.Defaults,
}
}
}
type resourceForTest struct {
overrideValues map[string]cty.Value
}
type resourceForTestByType map[string]resourceForTest
func (m resourceForTestByType) getOverrideValues(typeName string) map[string]cty.Value {
return m[typeName].overrideValues
}
func newMockValueComposer(typeName string) hcl2shim.MockValueComposer {
hash := fnv.New64()
hash.Write([]byte(typeName))
return hcl2shim.NewMockValueComposer(int64(hash.Sum64()))
}