fix(ske): read only attributes produces noise (#1081)
* fix(ske): read-only attributes produces noise * feat: add new planmodifier `UseStateForUnknownIf`
This commit is contained in:
Marcel Jacek
GitHub
parent
06747751ca
commit
8a609d4ab8
3 changed files with 249 additions and 0 deletions
69
stackit/internal/utils/use_state_for_unknown_if.go
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69
stackit/internal/utils/use_state_for_unknown_if.go
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@ -0,0 +1,69 @@
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package utils
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import (
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"context"
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"github.com/hashicorp/terraform-plugin-framework/diag"
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"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
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)
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type UseStateForUnknownFuncResponse struct {
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UseStateForUnknown bool
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Diagnostics diag.Diagnostics
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}
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// UseStateForUnknownIfFunc is a conditional function used in UseStateForUnknownIf
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type UseStateForUnknownIfFunc func(context.Context, planmodifier.StringRequest, *UseStateForUnknownFuncResponse)
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type useStateForUnknownIf struct {
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ifFunc UseStateForUnknownIfFunc
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description string
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}
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// UseStateForUnknownIf returns a plan modifier similar to UseStateForUnknown with a conditional
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func UseStateForUnknownIf(f UseStateForUnknownIfFunc, description string) planmodifier.String {
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return useStateForUnknownIf{
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ifFunc: f,
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description: description,
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}
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}
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func (m useStateForUnknownIf) Description(context.Context) string {
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return m.description
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}
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func (m useStateForUnknownIf) MarkdownDescription(ctx context.Context) string {
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return m.Description(ctx)
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}
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func (m useStateForUnknownIf) PlanModifyString(ctx context.Context, req planmodifier.StringRequest, resp *planmodifier.StringResponse) { // nolint:gocritic // function signature required by Terraform
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// Do nothing if there is no state value.
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if req.StateValue.IsNull() {
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return
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}
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// Do nothing if there is a known planned value.
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if !req.PlanValue.IsUnknown() {
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return
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}
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// Do nothing if there is an unknown configuration value, otherwise interpolation gets messed up.
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if req.ConfigValue.IsUnknown() {
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return
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}
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// The above checks are taken from the UseStateForUnknown plan modifier implementation
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// (https://github.com/hashicorp/terraform-plugin-framework/blob/44348af3923c82a93c64ae7dca906d9850ba956b/resource/schema/stringplanmodifier/use_state_for_unknown.go#L38)
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funcResponse := &UseStateForUnknownFuncResponse{}
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m.ifFunc(ctx, req, funcResponse)
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resp.Diagnostics.Append(funcResponse.Diagnostics...)
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if resp.Diagnostics.HasError() {
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return
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}
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if funcResponse.UseStateForUnknown {
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resp.PlanValue = req.StateValue
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}
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}
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128
stackit/internal/utils/use_state_for_unknown_if_test.go
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128
stackit/internal/utils/use_state_for_unknown_if_test.go
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@ -0,0 +1,128 @@
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package utils
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import (
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"context"
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"testing"
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"github.com/hashicorp/terraform-plugin-framework/resource/schema/planmodifier"
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"github.com/hashicorp/terraform-plugin-framework/types"
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)
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func TestUseStateForUnknownIf_PlanModifyString(t *testing.T) {
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ctx := context.Background()
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tests := []struct {
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name string
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stateValue types.String
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planValue types.String
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configValue types.String
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ifFunc UseStateForUnknownIfFunc
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expectedPlanValue types.String
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expectedError bool
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}{
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{
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name: "State is Null (Creation)",
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stateValue: types.StringNull(),
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planValue: types.StringUnknown(),
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configValue: types.StringValue("some-config"),
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ifFunc: func(_ context.Context, _ planmodifier.StringRequest, resp *UseStateForUnknownFuncResponse) {
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// This should not be reached because the state is null
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resp.UseStateForUnknown = true
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},
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expectedPlanValue: types.StringUnknown(),
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},
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{
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name: "Plan is already known - (User updated the value)",
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stateValue: types.StringValue("old-state"),
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planValue: types.StringValue("new-plan"),
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configValue: types.StringValue("new-plan"),
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ifFunc: func(_ context.Context, _ planmodifier.StringRequest, resp *UseStateForUnknownFuncResponse) {
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// This should not be reached because the plan is known
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resp.UseStateForUnknown = true
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},
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expectedPlanValue: types.StringValue("new-plan"),
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},
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{
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name: "Config is Unknown (Interpolation)",
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stateValue: types.StringValue("old-state"),
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planValue: types.StringUnknown(),
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configValue: types.StringUnknown(),
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ifFunc: func(_ context.Context, _ planmodifier.StringRequest, resp *UseStateForUnknownFuncResponse) {
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// This should not be reached
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resp.UseStateForUnknown = true
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},
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expectedPlanValue: types.StringUnknown(),
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},
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{
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name: "Condition returns False (Do not use state)",
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stateValue: types.StringValue("old-state"),
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planValue: types.StringUnknown(),
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configValue: types.StringNull(), // Simulating computed only
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ifFunc: func(_ context.Context, _ planmodifier.StringRequest, resp *UseStateForUnknownFuncResponse) {
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resp.UseStateForUnknown = false
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},
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expectedPlanValue: types.StringUnknown(),
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},
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{
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name: "Condition returns True (Use state)",
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stateValue: types.StringValue("old-state"),
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planValue: types.StringUnknown(),
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configValue: types.StringNull(),
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ifFunc: func(_ context.Context, _ planmodifier.StringRequest, resp *UseStateForUnknownFuncResponse) {
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resp.UseStateForUnknown = true
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},
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expectedPlanValue: types.StringValue("old-state"),
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},
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{
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name: "Func returns Error",
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stateValue: types.StringValue("old-state"),
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planValue: types.StringUnknown(),
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configValue: types.StringNull(),
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ifFunc: func(_ context.Context, _ planmodifier.StringRequest, resp *UseStateForUnknownFuncResponse) {
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resp.Diagnostics.AddError("Test Error", "Something went wrong")
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},
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expectedPlanValue: types.StringUnknown(),
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expectedError: true,
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},
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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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// Initialize the modifier
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modifier := UseStateForUnknownIf(tt.ifFunc, "test description")
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// Construct request
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req := planmodifier.StringRequest{
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StateValue: tt.stateValue,
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PlanValue: tt.planValue,
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ConfigValue: tt.configValue,
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}
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// Construct response
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// Note: In the framework, resp.PlanValue is initialized to req.PlanValue
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// before the modifier is called. We must simulate this.
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resp := &planmodifier.StringResponse{
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PlanValue: tt.planValue,
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}
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// Run the modifier
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modifier.PlanModifyString(ctx, req, resp)
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// Check Errors
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if tt.expectedError {
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if !resp.Diagnostics.HasError() {
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t.Error("Expected error, got none")
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}
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} else {
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if resp.Diagnostics.HasError() {
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t.Errorf("Unexpected error: %s", resp.Diagnostics)
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}
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}
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// Check Plan Value
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if !resp.PlanValue.Equal(tt.expectedPlanValue) {
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t.Errorf("PlanValue mismatch.\nExpected: %s\nGot: %s", tt.expectedPlanValue, resp.PlanValue)
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}
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})
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}
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}
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