package resource
import (
"fmt"
"log"
"strings"
"github.com/hashicorp/terraform/terraform"
)
// testStepConfig runs a config-mode test step
func testStepConfig(
opts terraform.ContextOpts,
state *terraform.State,
step TestStep) (*terraform.State, error) {
return testStep(opts, state, step)
}
func testStep(
opts terraform.ContextOpts,
state *terraform.State,
step TestStep) (*terraform.State, error) {
mod, err := testModule(opts, step)
if err != nil {
return state, err
}
// Build the context
opts.Module = mod
opts.State = state
opts.Destroy = step.Destroy
ctx, err := terraform.NewContext(&opts)
if err != nil {
return state, fmt.Errorf("Error initializing context: %s", err)
}
if ws, es := ctx.Validate(); len(ws) > 0 || len(es) > 0 {
if len(es) > 0 {
estrs := make([]string, len(es))
for i, e := range es {
estrs[i] = e.Error()
}
return state, fmt.Errorf(
"Configuration is invalid.\n\nWarnings: %#v\n\nErrors: %#v",
ws, estrs)
}
log.Printf("[WARN] Config warnings: %#v", ws)
}
// Refresh!
state, err = ctx.Refresh()
if err != nil {
return state, fmt.Errorf(
"Error refreshing: %s", err)
}
// If this step is a PlanOnly step, skip over this first Plan and subsequent
// Apply, and use the follow up Plan that checks for perpetual diffs
if !step.PlanOnly {
// Plan!
if p, err := ctx.Plan(); err != nil {
return state, fmt.Errorf(
"Error planning: %s", err)
} else {
log.Printf("[WARN] Test: Step plan: %s", p)
}
// We need to keep a copy of the state prior to destroying
// such that destroy steps can verify their behaviour in the check
// function
stateBeforeApplication := state.DeepCopy()
// Apply!
state, err = ctx.Apply()
if err != nil {
return state, fmt.Errorf("Error applying: %s", err)
}
// Check! Excitement!
if step.Check != nil {
if step.Destroy {
if err := step.Check(stateBeforeApplication); err != nil {
return state, fmt.Errorf("Check failed: %s", err)
}
} else {
if err := step.Check(state); err != nil {
return state, fmt.Errorf("Check failed: %s", err)
}
}
}
}
// Now, verify that Plan is now empty and we don't have a perpetual diff issue
// We do this with TWO plans. One without a refresh.
var p *terraform.Plan
if p, err = ctx.Plan(); err != nil {
return state, fmt.Errorf("Error on follow-up plan: %s", err)
}
if p.Diff != nil && !p.Diff.Empty() {
if step.ExpectNonEmptyPlan {
log.Printf("[INFO] Got non-empty plan, as expected:\n\n%s", p)
} else {
return state, fmt.Errorf(
"After applying this step, the plan was not empty:\n\n%s", p)
}
}
// And another after a Refresh.
if !step.Destroy || (step.Destroy && !step.PreventPostDestroyRefresh) {
state, err = ctx.Refresh()
if err != nil {
return state, fmt.Errorf(
"Error on follow-up refresh: %s", err)
}
}
if p, err = ctx.Plan(); err != nil {
return state, fmt.Errorf("Error on second follow-up plan: %s", err)
}
empty := p.Diff == nil || p.Diff.Empty()
// Data resources are tricky because they legitimately get instantiated
// during refresh so that they will be already populated during the
// plan walk. Because of this, if we have any data resources in the
// config we'll end up wanting to destroy them again here. This is
// acceptable and expected, and we'll treat it as "empty" for the
// sake of this testing.
if step.Destroy {
empty = true
for _, moduleDiff := range p.Diff.Modules {
for k, instanceDiff := range moduleDiff.Resources {
if !strings.HasPrefix(k, "data.") {
empty = false
break
}
if !instanceDiff.Destroy {
empty = false
}
}
}
}
if !empty {
if step.ExpectNonEmptyPlan {
log.Printf("[INFO] Got non-empty plan, as expected:\n\n%s", p)
} else {
return state, fmt.Errorf(
"After applying this step and refreshing, "+
"the plan was not empty:\n\n%s", p)
}
}
// Made it here, but expected a non-empty plan, fail!
if step.ExpectNonEmptyPlan && (p.Diff == nil || p.Diff.Empty()) {
return state, fmt.Errorf("Expected a non-empty plan, but got an empty plan!")
}
// Made it here? Good job test step!
return state, nil
}
