package resource import ( "flag" "fmt" "io" "io/ioutil" "log" "os" "path/filepath" "reflect" "regexp" "strings" "testing" "github.com/davecgh/go-spew/spew" "github.com/hashicorp/go-getter" "github.com/hashicorp/go-multierror" "github.com/hashicorp/terraform/config/module" "github.com/hashicorp/terraform/helper/logging" "github.com/hashicorp/terraform/terraform" ) // flagSweep is a flag available when running tests on the command line. It // contains a comma seperated list of regions to for the sweeper functions to // run in. This flag bypasses the normal Test path and instead runs functions designed to // clean up any leaked resources a testing environment could have created. It is // a best effort attempt, and relies on Provider authors to implement "Sweeper" // methods for resources. // Adding Sweeper methods with AddTestSweepers will // construct a list of sweeper funcs to be called here. We iterate through // regions provided by the sweep flag, and for each region we iterate through the // tests, and exit on any errors. At time of writing, sweepers are ran // sequentially, however they can list dependencies to be ran first. We track // the sweepers that have been ran, so as to not run a sweeper twice for a given // region. // // WARNING: // Sweepers are designed to be destructive. You should not use the -sweep flag // in any environment that is not strictly a test environment. Resources will be // destroyed. var flagSweep = flag.String("sweep", "", "List of Regions to run available Sweepers") var flagSweepRun = flag.String("sweep-run", "", "Comma seperated list of Sweeper Tests to run") var sweeperFuncs map[string]*Sweeper // map of sweepers that have ran, and the success/fail status based on any error // raised var sweeperRunList map[string]bool // type SweeperFunc is a signature for a function that acts as a sweeper. It // accepts a string for the region that the sweeper is to be ran in. This // function must be able to construct a valid client for that region. type SweeperFunc func(r string) error type Sweeper struct { // Name for sweeper. Must be unique to be ran by the Sweeper Runner Name string // Dependencies list the const names of other Sweeper functions that must be ran // prior to running this Sweeper. This is an ordered list that will be invoked // recursively at the helper/resource level Dependencies []string // Sweeper function that when invoked sweeps the Provider of specific // resources F SweeperFunc } func init() { sweeperFuncs = make(map[string]*Sweeper) } // AddTestSweepers function adds a given name and Sweeper configuration // pair to the internal sweeperFuncs map. Invoke this function to register a // resource sweeper to be available for running when the -sweep flag is used // with `go test`. Sweeper names must be unique to help ensure a given sweeper // is only ran once per run. func AddTestSweepers(name string, s *Sweeper) { if _, ok := sweeperFuncs[name]; ok { log.Fatalf("[ERR] Error adding (%s) to sweeperFuncs: function already exists in map", name) } sweeperFuncs[name] = s } func TestMain(m *testing.M) { flag.Parse() if *flagSweep != "" { // parse flagSweep contents for regions to run regions := strings.Split(*flagSweep, ",") // get filtered list of sweepers to run based on sweep-run flag sweepers := filterSweepers(*flagSweepRun, sweeperFuncs) for _, region := range regions { region = strings.TrimSpace(region) // reset sweeperRunList for each region sweeperRunList = map[string]bool{} log.Printf("[DEBUG] Running Sweepers for region (%s):\n", region) for _, sweeper := range sweepers { if err := runSweeperWithRegion(region, sweeper); err != nil { log.Fatalf("[ERR] error running (%s): %s", sweeper.Name, err) } } log.Printf("Sweeper Tests ran:\n") for s, _ := range sweeperRunList { fmt.Printf("\t- %s\n", s) } } } else { os.Exit(m.Run()) } } // filterSweepers takes a comma seperated string listing the names of sweepers // to be ran, and returns a filtered set from the list of all of sweepers to // run based on the names given. func filterSweepers(f string, source map[string]*Sweeper) map[string]*Sweeper { filterSlice := strings.Split(strings.ToLower(f), ",") if len(filterSlice) == 1 && filterSlice[0] == "" { // if the filter slice is a single element of "" then no sweeper list was // given, so just return the full list return source } sweepers := make(map[string]*Sweeper) for name, sweeper := range source { for _, s := range filterSlice { if strings.Contains(strings.ToLower(name), s) { sweepers[name] = sweeper } } } return sweepers } // runSweeperWithRegion recieves a sweeper and a region, and recursively calls // itself with that region for every dependency found for that sweeper. If there // are no dependencies, invoke the contained sweeper fun with the region, and // add the success/fail status to the sweeperRunList. func runSweeperWithRegion(region string, s *Sweeper) error { for _, dep := range s.Dependencies { if depSweeper, ok := sweeperFuncs[dep]; ok { log.Printf("[DEBUG] Sweeper (%s) has dependency (%s), running..", s.Name, dep) if err := runSweeperWithRegion(region, depSweeper); err != nil { return err } } else { log.Printf("[DEBUG] Sweeper (%s) has dependency (%s), but that sweeper was not found", s.Name, dep) } } if _, ok := sweeperRunList[s.Name]; ok { log.Printf("[DEBUG] Sweeper (%s) already ran in region (%s)", s.Name, region) return nil } runE := s.F(region) if runE == nil { sweeperRunList[s.Name] = true } else { sweeperRunList[s.Name] = false } return runE } const TestEnvVar = "TF_ACC" // TestProvider can be implemented by any ResourceProvider to provide custom // reset functionality at the start of an acceptance test. // The helper/schema Provider implements this interface. type TestProvider interface { TestReset() error } // TestCheckFunc is the callback type used with acceptance tests to check // the state of a resource. The state passed in is the latest state known, // or in the case of being after a destroy, it is the last known state when // it was created. type TestCheckFunc func(*terraform.State) error // ImportStateCheckFunc is the check function for ImportState tests type ImportStateCheckFunc func([]*terraform.InstanceState) error // ImportStateIdFunc is an ID generation function to help with complex ID // generation for ImportState tests. type ImportStateIdFunc func(*terraform.State) (string, error) // TestCase is a single acceptance test case used to test the apply/destroy // lifecycle of a resource in a specific configuration. // // When the destroy plan is executed, the config from the last TestStep // is used to plan it. type TestCase struct { // IsUnitTest allows a test to run regardless of the TF_ACC // environment variable. This should be used with care - only for // fast tests on local resources (e.g. remote state with a local // backend) but can be used to increase confidence in correct // operation of Terraform without waiting for a full acctest run. IsUnitTest bool // PreCheck, if non-nil, will be called before any test steps are // executed. It will only be executed in the case that the steps // would run, so it can be used for some validation before running // acceptance tests, such as verifying that keys are setup. PreCheck func() // Providers is the ResourceProvider that will be under test. // // Alternately, ProviderFactories can be specified for the providers // that are valid. This takes priority over Providers. // // The end effect of each is the same: specifying the providers that // are used within the tests. Providers map[string]terraform.ResourceProvider ProviderFactories map[string]terraform.ResourceProviderFactory // PreventPostDestroyRefresh can be set to true for cases where data sources // are tested alongside real resources PreventPostDestroyRefresh bool // CheckDestroy is called after the resource is finally destroyed // to allow the tester to test that the resource is truly gone. CheckDestroy TestCheckFunc // Steps are the apply sequences done within the context of the // same state. Each step can have its own check to verify correctness. Steps []TestStep // The settings below control the "ID-only refresh test." This is // an enabled-by-default test that tests that a refresh can be // refreshed with only an ID to result in the same attributes. // This validates completeness of Refresh. // // IDRefreshName is the name of the resource to check. This will // default to the first non-nil primary resource in the state. // // IDRefreshIgnore is a list of configuration keys that will be ignored. IDRefreshName string IDRefreshIgnore []string } // TestStep is a single apply sequence of a test, done within the // context of a state. // // Multiple TestSteps can be sequenced in a Test to allow testing // potentially complex update logic. In general, simply create/destroy // tests will only need one step. type TestStep struct { // ResourceName should be set to the name of the resource // that is being tested. Example: "aws_instance.foo". Various test // modes use this to auto-detect state information. // // This is only required if the test mode settings below say it is // for the mode you're using. ResourceName string // PreConfig is called before the Config is applied to perform any per-step // setup that needs to happen. This is called regardless of "test mode" // below. PreConfig func() //--------------------------------------------------------------- // Test modes. One of the following groups of settings must be // set to determine what the test step will do. Ideally we would've // used Go interfaces here but there are now hundreds of tests we don't // want to re-type so instead we just determine which step logic // to run based on what settings below are set. //--------------------------------------------------------------- //--------------------------------------------------------------- // Plan, Apply testing //--------------------------------------------------------------- // Config a string of the configuration to give to Terraform. If this // is set, then the TestCase will execute this step with the same logic // as a `terraform apply`. Config string // Check is called after the Config is applied. Use this step to // make your own API calls to check the status of things, and to // inspect the format of the ResourceState itself. // // If an error is returned, the test will fail. In this case, a // destroy plan will still be attempted. // // If this is nil, no check is done on this step. Check TestCheckFunc // Destroy will create a destroy plan if set to true. Destroy bool // ExpectNonEmptyPlan can be set to true for specific types of tests that are // looking to verify that a diff occurs ExpectNonEmptyPlan bool // ExpectError allows the construction of test cases that we expect to fail // with an error. The specified regexp must match against the error for the // test to pass. ExpectError *regexp.Regexp // PlanOnly can be set to only run `plan` with this configuration, and not // actually apply it. This is useful for ensuring config changes result in // no-op plans PlanOnly bool // PreventPostDestroyRefresh can be set to true for cases where data sources // are tested alongside real resources PreventPostDestroyRefresh bool // SkipFunc is called before applying config, but after PreConfig // This is useful for defining test steps with platform-dependent checks SkipFunc func() (bool, error) //--------------------------------------------------------------- // ImportState testing //--------------------------------------------------------------- // ImportState, if true, will test the functionality of ImportState // by importing the resource with ResourceName (must be set) and the // ID of that resource. ImportState bool // ImportStateId is the ID to perform an ImportState operation with. // This is optional. If it isn't set, then the resource ID is automatically // determined by inspecting the state for ResourceName's ID. ImportStateId string // ImportStateIdPrefix is the prefix added in front of ImportStateId. // This can be useful in complex import cases, where more than one // attribute needs to be passed on as the Import ID. Mainly in cases // where the ID is not known, and a known prefix needs to be added to // the unset ImportStateId field. ImportStateIdPrefix string // ImportStateIdFunc is a function that can be used to dynamically generate // the ID for the ImportState tests. It is sent the state, which can be // checked to derive the attributes necessary and generate the string in the // desired format. ImportStateIdFunc ImportStateIdFunc // ImportStateCheck checks the results of ImportState. It should be // used to verify that the resulting value of ImportState has the // proper resources, IDs, and attributes. ImportStateCheck ImportStateCheckFunc // ImportStateVerify, if true, will also check that the state values // that are finally put into the state after import match for all the // IDs returned by the Import. // // ImportStateVerifyIgnore are fields that should not be verified to // be equal. These can be set to ephemeral fields or fields that can't // be refreshed and don't matter. ImportStateVerify bool ImportStateVerifyIgnore []string } // Test performs an acceptance test on a resource. // // Tests are not run unless an environmental variable "TF_ACC" is // set to some non-empty value. This is to avoid test cases surprising // a user by creating real resources. // // Tests will fail unless the verbose flag (`go test -v`, or explicitly // the "-test.v" flag) is set. Because some acceptance tests take quite // long, we require the verbose flag so users are able to see progress // output. func Test(t TestT, c TestCase) { // We only run acceptance tests if an env var is set because they're // slow and generally require some outside configuration. You can opt out // of this with OverrideEnvVar on individual TestCases. if os.Getenv(TestEnvVar) == "" && !c.IsUnitTest { t.Skip(fmt.Sprintf( "Acceptance tests skipped unless env '%s' set", TestEnvVar)) return } logWriter, err := logging.LogOutput() if err != nil { t.Error(fmt.Errorf("error setting up logging: %s", err)) } log.SetOutput(logWriter) // We require verbose mode so that the user knows what is going on. if !testTesting && !testing.Verbose() && !c.IsUnitTest { t.Fatal("Acceptance tests must be run with the -v flag on tests") return } // Run the PreCheck if we have it if c.PreCheck != nil { c.PreCheck() } providerResolver, err := testProviderResolver(c) if err != nil { t.Fatal(err) } opts := terraform.ContextOpts{ProviderResolver: providerResolver} // A single state variable to track the lifecycle, starting with no state var state *terraform.State // Go through each step and run it var idRefreshCheck *terraform.ResourceState idRefresh := c.IDRefreshName != "" errored := false for i, step := range c.Steps { var err error log.Printf("[DEBUG] Test: Executing step %d", i) if step.SkipFunc != nil { skip, err := step.SkipFunc() if err != nil { t.Fatal(err) } if skip { log.Printf("[WARN] Skipping step %d", i) continue } } if step.Config == "" && !step.ImportState { err = fmt.Errorf( "unknown test mode for step. Please see TestStep docs\n\n%#v", step) } else { if step.ImportState { if step.Config == "" { step.Config = testProviderConfig(c) } // Can optionally set step.Config in addition to // step.ImportState, to provide config for the import. state, err = testStepImportState(opts, state, step) } else { state, err = testStepConfig(opts, state, step) } } // If there was an error, exit if err != nil { // Perhaps we expected an error? Check if it matches if step.ExpectError != nil { if !step.ExpectError.MatchString(err.Error()) { errored = true t.Error(fmt.Sprintf( "Step %d, expected error:\n\n%s\n\nTo match:\n\n%s\n\n", i, err, step.ExpectError)) break } } else { errored = true t.Error(fmt.Sprintf( "Step %d error: %s", i, err)) break } } // If we've never checked an id-only refresh and our state isn't // empty, find the first resource and test it. if idRefresh && idRefreshCheck == nil && !state.Empty() { // Find the first non-nil resource in the state for _, m := range state.Modules { if len(m.Resources) > 0 { if v, ok := m.Resources[c.IDRefreshName]; ok { idRefreshCheck = v } break } } // If we have an instance to check for refreshes, do it // immediately. We do it in the middle of another test // because it shouldn't affect the overall state (refresh // is read-only semantically) and we want to fail early if // this fails. If refresh isn't read-only, then this will have // caught a different bug. if idRefreshCheck != nil { log.Printf( "[WARN] Test: Running ID-only refresh check on %s", idRefreshCheck.Primary.ID) if err := testIDOnlyRefresh(c, opts, step, idRefreshCheck); err != nil { log.Printf("[ERROR] Test: ID-only test failed: %s", err) t.Error(fmt.Sprintf( "[ERROR] Test: ID-only test failed: %s", err)) break } } } } // If we never checked an id-only refresh, it is a failure. if idRefresh { if !errored && len(c.Steps) > 0 && idRefreshCheck == nil { t.Error("ID-only refresh check never ran.") } } // If we have a state, then run the destroy if state != nil { lastStep := c.Steps[len(c.Steps)-1] destroyStep := TestStep{ Config: lastStep.Config, Check: c.CheckDestroy, Destroy: true, PreventPostDestroyRefresh: c.PreventPostDestroyRefresh, } log.Printf("[WARN] Test: Executing destroy step") state, err := testStep(opts, state, destroyStep) if err != nil { t.Error(fmt.Sprintf( "Error destroying resource! WARNING: Dangling resources\n"+ "may exist. The full state and error is shown below.\n\n"+ "Error: %s\n\nState: %s", err, state)) } } else { log.Printf("[WARN] Skipping destroy test since there is no state.") } } // testProviderConfig takes the list of Providers in a TestCase and returns a // config with only empty provider blocks. This is useful for Import, where no // config is provided, but the providers must be defined. func testProviderConfig(c TestCase) string { var lines []string for p := range c.Providers { lines = append(lines, fmt.Sprintf("provider %q {}\n", p)) } return strings.Join(lines, "") } // testProviderResolver is a helper to build a ResourceProviderResolver // with pre instantiated ResourceProviders, so that we can reset them for the // test, while only calling the factory function once. // Any errors are stored so that they can be returned by the factory in // terraform to match non-test behavior. func testProviderResolver(c TestCase) (terraform.ResourceProviderResolver, error) { ctxProviders := c.ProviderFactories if ctxProviders == nil { ctxProviders = make(map[string]terraform.ResourceProviderFactory) } // add any fixed providers for k, p := range c.Providers { ctxProviders[k] = terraform.ResourceProviderFactoryFixed(p) } // reset the providers if needed for k, pf := range ctxProviders { // we can ignore any errors here, if we don't have a provider to reset // the error will be handled later p, err := pf() if err != nil { return nil, err } if p, ok := p.(TestProvider); ok { err := p.TestReset() if err != nil { return nil, fmt.Errorf("[ERROR] failed to reset provider %q: %s", k, err) } } } return terraform.ResourceProviderResolverFixed(ctxProviders), nil } // UnitTest is a helper to force the acceptance testing harness to run in the // normal unit test suite. This should only be used for resource that don't // have any external dependencies. func UnitTest(t TestT, c TestCase) { c.IsUnitTest = true Test(t, c) } func testIDOnlyRefresh(c TestCase, opts terraform.ContextOpts, step TestStep, r *terraform.ResourceState) error { // TODO: We guard by this right now so master doesn't explode. We // need to remove this eventually to make this part of the normal tests. if os.Getenv("TF_ACC_IDONLY") == "" { return nil } name := fmt.Sprintf("%s.foo", r.Type) // Build the state. The state is just the resource with an ID. There // are no attributes. We only set what is needed to perform a refresh. state := terraform.NewState() state.RootModule().Resources[name] = &terraform.ResourceState{ Type: r.Type, Primary: &terraform.InstanceState{ ID: r.Primary.ID, }, } // Create the config module. We use the full config because Refresh // doesn't have access to it and we may need things like provider // configurations. The initial implementation of id-only checks used // an empty config module, but that caused the aforementioned problems. mod, err := testModule(opts, step) if err != nil { return err } // Initialize the context opts.Module = mod opts.State = state ctx, err := terraform.NewContext(&opts) if err != nil { return 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 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 fmt.Errorf("Error refreshing: %s", err) } // Verify attribute equivalence. actualR := state.RootModule().Resources[name] if actualR == nil { return fmt.Errorf("Resource gone!") } if actualR.Primary == nil { return fmt.Errorf("Resource has no primary instance") } actual := actualR.Primary.Attributes expected := r.Primary.Attributes // Remove fields we're ignoring for _, v := range c.IDRefreshIgnore { for k, _ := range actual { if strings.HasPrefix(k, v) { delete(actual, k) } } for k, _ := range expected { if strings.HasPrefix(k, v) { delete(expected, k) } } } if !reflect.DeepEqual(actual, expected) { // Determine only the different attributes for k, v := range expected { if av, ok := actual[k]; ok && v == av { delete(expected, k) delete(actual, k) } } spewConf := spew.NewDefaultConfig() spewConf.SortKeys = true return fmt.Errorf( "Attributes not equivalent. Difference is shown below. Top is actual, bottom is expected."+ "\n\n%s\n\n%s", spewConf.Sdump(actual), spewConf.Sdump(expected)) } return nil } func testModule( opts terraform.ContextOpts, step TestStep) (*module.Tree, error) { if step.PreConfig != nil { step.PreConfig() } cfgPath, err := ioutil.TempDir("", "tf-test") if err != nil { return nil, fmt.Errorf( "Error creating temporary directory for config: %s", err) } defer os.RemoveAll(cfgPath) // Write the configuration cfgF, err := os.Create(filepath.Join(cfgPath, "main.tf")) if err != nil { return nil, fmt.Errorf( "Error creating temporary file for config: %s", err) } _, err = io.Copy(cfgF, strings.NewReader(step.Config)) cfgF.Close() if err != nil { return nil, fmt.Errorf( "Error creating temporary file for config: %s", err) } // Parse the configuration mod, err := module.NewTreeModule("", cfgPath) if err != nil { return nil, fmt.Errorf( "Error loading configuration: %s", err) } // Load the modules modStorage := &getter.FolderStorage{ StorageDir: filepath.Join(cfgPath, ".tfmodules"), } err = mod.Load(modStorage, module.GetModeGet) if err != nil { return nil, fmt.Errorf("Error downloading modules: %s", err) } return mod, nil } func testResource(c TestStep, state *terraform.State) (*terraform.ResourceState, error) { if c.ResourceName == "" { return nil, fmt.Errorf("ResourceName must be set in TestStep") } for _, m := range state.Modules { if len(m.Resources) > 0 { if v, ok := m.Resources[c.ResourceName]; ok { return v, nil } } } return nil, fmt.Errorf( "Resource specified by ResourceName couldn't be found: %s", c.ResourceName) } // ComposeTestCheckFunc lets you compose multiple TestCheckFuncs into // a single TestCheckFunc. // // As a user testing their provider, this lets you decompose your checks // into smaller pieces more easily. func ComposeTestCheckFunc(fs ...TestCheckFunc) TestCheckFunc { return func(s *terraform.State) error { for i, f := range fs { if err := f(s); err != nil { return fmt.Errorf("Check %d/%d error: %s", i+1, len(fs), err) } } return nil } } // ComposeAggregateTestCheckFunc lets you compose multiple TestCheckFuncs into // a single TestCheckFunc. // // As a user testing their provider, this lets you decompose your checks // into smaller pieces more easily. // // Unlike ComposeTestCheckFunc, ComposeAggergateTestCheckFunc runs _all_ of the // TestCheckFuncs and aggregates failures. func ComposeAggregateTestCheckFunc(fs ...TestCheckFunc) TestCheckFunc { return func(s *terraform.State) error { var result *multierror.Error for i, f := range fs { if err := f(s); err != nil { result = multierror.Append(result, fmt.Errorf("Check %d/%d error: %s", i+1, len(fs), err)) } } return result.ErrorOrNil() } } // TestCheckResourceAttrSet is a TestCheckFunc which ensures a value // exists in state for the given name/key combination. It is useful when // testing that computed values were set, when it is not possible to // know ahead of time what the values will be. func TestCheckResourceAttrSet(name, key string) TestCheckFunc { return func(s *terraform.State) error { is, err := primaryInstanceState(s, name) if err != nil { return err } if val, ok := is.Attributes[key]; ok && val != "" { return nil } return fmt.Errorf("%s: Attribute '%s' expected to be set", name, key) } } // TestCheckResourceAttr is a TestCheckFunc which validates // the value in state for the given name/key combination. func TestCheckResourceAttr(name, key, value string) TestCheckFunc { return func(s *terraform.State) error { is, err := primaryInstanceState(s, name) if err != nil { return err } if v, ok := is.Attributes[key]; !ok || v != value { if !ok { return fmt.Errorf("%s: Attribute '%s' not found", name, key) } return fmt.Errorf( "%s: Attribute '%s' expected %#v, got %#v", name, key, value, v) } return nil } } // TestCheckNoResourceAttr is a TestCheckFunc which ensures that // NO value exists in state for the given name/key combination. func TestCheckNoResourceAttr(name, key string) TestCheckFunc { return func(s *terraform.State) error { is, err := primaryInstanceState(s, name) if err != nil { return err } if _, ok := is.Attributes[key]; ok { return fmt.Errorf("%s: Attribute '%s' found when not expected", name, key) } return nil } } // TestMatchResourceAttr is a TestCheckFunc which checks that the value // in state for the given name/key combination matches the given regex. func TestMatchResourceAttr(name, key string, r *regexp.Regexp) TestCheckFunc { return func(s *terraform.State) error { is, err := primaryInstanceState(s, name) if err != nil { return err } if !r.MatchString(is.Attributes[key]) { return fmt.Errorf( "%s: Attribute '%s' didn't match %q, got %#v", name, key, r.String(), is.Attributes[key]) } return nil } } // TestCheckResourceAttrPtr is like TestCheckResourceAttr except the // value is a pointer so that it can be updated while the test is running. // It will only be dereferenced at the point this step is run. func TestCheckResourceAttrPtr(name string, key string, value *string) TestCheckFunc { return func(s *terraform.State) error { return TestCheckResourceAttr(name, key, *value)(s) } } // TestCheckResourceAttrPair is a TestCheckFunc which validates that the values // in state for a pair of name/key combinations are equal. func TestCheckResourceAttrPair(nameFirst, keyFirst, nameSecond, keySecond string) TestCheckFunc { return func(s *terraform.State) error { isFirst, err := primaryInstanceState(s, nameFirst) if err != nil { return err } vFirst, ok := isFirst.Attributes[keyFirst] if !ok { return fmt.Errorf("%s: Attribute '%s' not found", nameFirst, keyFirst) } isSecond, err := primaryInstanceState(s, nameSecond) if err != nil { return err } vSecond, ok := isSecond.Attributes[keySecond] if !ok { return fmt.Errorf("%s: Attribute '%s' not found", nameSecond, keySecond) } if vFirst != vSecond { return fmt.Errorf( "%s: Attribute '%s' expected %#v, got %#v", nameFirst, keyFirst, vSecond, vFirst) } return nil } } // TestCheckOutput checks an output in the Terraform configuration func TestCheckOutput(name, value string) TestCheckFunc { return func(s *terraform.State) error { ms := s.RootModule() rs, ok := ms.Outputs[name] if !ok { return fmt.Errorf("Not found: %s", name) } if rs.Value != value { return fmt.Errorf( "Output '%s': expected %#v, got %#v", name, value, rs) } return nil } } func TestMatchOutput(name string, r *regexp.Regexp) TestCheckFunc { return func(s *terraform.State) error { ms := s.RootModule() rs, ok := ms.Outputs[name] if !ok { return fmt.Errorf("Not found: %s", name) } if !r.MatchString(rs.Value.(string)) { return fmt.Errorf( "Output '%s': %#v didn't match %q", name, rs, r.String()) } return nil } } // TestT is the interface used to handle the test lifecycle of a test. // // Users should just use a *testing.T object, which implements this. type TestT interface { Error(args ...interface{}) Fatal(args ...interface{}) Skip(args ...interface{}) } // This is set to true by unit tests to alter some behavior var testTesting = false // primaryInstanceState returns the primary instance state for the given resource name. func primaryInstanceState(s *terraform.State, name string) (*terraform.InstanceState, error) { ms := s.RootModule() rs, ok := ms.Resources[name] if !ok { return nil, fmt.Errorf("Not found: %s", name) } is := rs.Primary if is == nil { return nil, fmt.Errorf("No primary instance: %s", name) } return is, nil }