package remote import ( "bytes" "crypto/md5" "net/http" "net/http/httptest" "os" "testing" "time" "github.com/hashicorp/terraform/helper/acctest" "github.com/hashicorp/terraform/terraform" ) func TestAtlasClient_impl(t *testing.T) { var _ Client = new(AtlasClient) } func TestAtlasClient(t *testing.T) { acctest.RemoteTestPrecheck(t) token := os.Getenv("ATLAS_TOKEN") if token == "" { t.Skipf("skipping, ATLAS_TOKEN must be set") } client, err := atlasFactory(map[string]string{ "access_token": token, "name": "hashicorp/test-remote-state", }) if err != nil { t.Fatalf("bad: %s", err) } testClient(t, client) } func TestAtlasClient_ReportedConflictEqualStates(t *testing.T) { fakeAtlas := newFakeAtlas(t, testStateModuleOrderChange) srv := fakeAtlas.Server() defer srv.Close() client, err := atlasFactory(map[string]string{ "access_token": "sometoken", "name": "someuser/some-test-remote-state", "address": srv.URL, }) if err != nil { t.Fatalf("err: %s", err) } state, err := terraform.ReadState(bytes.NewReader(testStateModuleOrderChange)) if err != nil { t.Fatalf("err: %s", err) } var stateJson bytes.Buffer if err := terraform.WriteState(state, &stateJson); err != nil { t.Fatalf("err: %s", err) } if err := client.Put(stateJson.Bytes()); err != nil { t.Fatalf("err: %s", err) } } func TestAtlasClient_NoConflict(t *testing.T) { fakeAtlas := newFakeAtlas(t, testStateSimple) srv := fakeAtlas.Server() defer srv.Close() client, err := atlasFactory(map[string]string{ "access_token": "sometoken", "name": "someuser/some-test-remote-state", "address": srv.URL, }) if err != nil { t.Fatalf("err: %s", err) } state, err := terraform.ReadState(bytes.NewReader(testStateSimple)) if err != nil { t.Fatalf("err: %s", err) } fakeAtlas.NoConflictAllowed(true) var stateJson bytes.Buffer if err := terraform.WriteState(state, &stateJson); err != nil { t.Fatalf("err: %s", err) } if err := client.Put(stateJson.Bytes()); err != nil { t.Fatalf("err: %s", err) } } func TestAtlasClient_LegitimateConflict(t *testing.T) { fakeAtlas := newFakeAtlas(t, testStateSimple) srv := fakeAtlas.Server() defer srv.Close() client, err := atlasFactory(map[string]string{ "access_token": "sometoken", "name": "someuser/some-test-remote-state", "address": srv.URL, }) if err != nil { t.Fatalf("err: %s", err) } state, err := terraform.ReadState(bytes.NewReader(testStateSimple)) if err != nil { t.Fatalf("err: %s", err) } // Changing the state but not the serial. Should generate a conflict. state.RootModule().Outputs["drift"] = "happens" var stateJson bytes.Buffer if err := terraform.WriteState(state, &stateJson); err != nil { t.Fatalf("err: %s", err) } if err := client.Put(stateJson.Bytes()); err == nil { t.Fatal("Expected error from state conflict, got none.") } } func TestAtlasClient_UnresolvableConflict(t *testing.T) { fakeAtlas := newFakeAtlas(t, testStateSimple) // Something unexpected causes Atlas to conflict in a way that we can't fix. fakeAtlas.AlwaysConflict(true) srv := fakeAtlas.Server() defer srv.Close() client, err := atlasFactory(map[string]string{ "access_token": "sometoken", "name": "someuser/some-test-remote-state", "address": srv.URL, }) if err != nil { t.Fatalf("err: %s", err) } state, err := terraform.ReadState(bytes.NewReader(testStateSimple)) if err != nil { t.Fatalf("err: %s", err) } var stateJson bytes.Buffer if err := terraform.WriteState(state, &stateJson); err != nil { t.Fatalf("err: %s", err) } doneCh := make(chan struct{}) go func() { defer close(doneCh) if err := client.Put(stateJson.Bytes()); err == nil { t.Fatal("Expected error from state conflict, got none.") } }() select { case <-doneCh: // OK case <-time.After(500 * time.Millisecond): t.Fatalf("Timed out after 50ms, probably because retrying infinitely.") } } // Stub Atlas HTTP API for a given state JSON string; does checksum-based // conflict detection equivalent to Atlas's. type fakeAtlas struct { state []byte t *testing.T // Used to test that we only do the special conflict handling retry once. alwaysConflict bool // Used to fail the test immediately if a conflict happens. noConflictAllowed bool } func newFakeAtlas(t *testing.T, state []byte) *fakeAtlas { return &fakeAtlas{ state: state, t: t, } } func (f *fakeAtlas) Server() *httptest.Server { return httptest.NewServer(http.HandlerFunc(f.handler)) } func (f *fakeAtlas) CurrentState() *terraform.State { currentState, err := terraform.ReadState(bytes.NewReader(f.state)) if err != nil { f.t.Fatalf("err: %s", err) } return currentState } func (f *fakeAtlas) CurrentSerial() int64 { return f.CurrentState().Serial } func (f *fakeAtlas) CurrentSum() [md5.Size]byte { return md5.Sum(f.state) } func (f *fakeAtlas) AlwaysConflict(b bool) { f.alwaysConflict = b } func (f *fakeAtlas) NoConflictAllowed(b bool) { f.noConflictAllowed = b } func (f *fakeAtlas) handler(resp http.ResponseWriter, req *http.Request) { switch req.Method { case "GET": // Respond with the current stored state. resp.Header().Set("Content-Type", "application/json") resp.Write(f.state) case "PUT": var buf bytes.Buffer buf.ReadFrom(req.Body) sum := md5.Sum(buf.Bytes()) state, err := terraform.ReadState(&buf) if err != nil { f.t.Fatalf("err: %s", err) } conflict := f.CurrentSerial() == state.Serial && f.CurrentSum() != sum conflict = conflict || f.alwaysConflict if conflict { if f.noConflictAllowed { f.t.Fatal("Got conflict when NoConflictAllowed was set.") } http.Error(resp, "Conflict", 409) } else { f.state = buf.Bytes() resp.WriteHeader(200) } } } // This is a tfstate file with the module order changed, which is a structural // but not a semantic difference. Terraform will sort these modules as it // loads the state. var testStateModuleOrderChange = []byte( `{ "version": 2, "serial": 1, "modules": [ { "path": [ "root", "child2", "grandchild" ], "outputs": { "foo": "bar2" }, "resources": null }, { "path": [ "root", "child1", "grandchild" ], "outputs": { "foo": "bar1" }, "resources": null } ] } `) var testStateSimple = []byte( `{ "version": 2, "serial": 1, "modules": [ { "path": [ "root" ], "outputs": { "foo": "bar" }, "resources": null } ] } `)