terraform/configs/parser_test.go

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package configs
import (
"fmt"
"os"
"path"
"path/filepath"
"reflect"
"testing"
"github.com/davecgh/go-spew/spew"
version "github.com/hashicorp/go-version"
"github.com/hashicorp/hcl/v2"
"github.com/spf13/afero"
)
// testParser returns a parser that reads files from the given map, which
// is from paths to file contents.
//
// Since this function uses only in-memory objects, it should never fail.
// If any errors are encountered in practice, this function will panic.
func testParser(files map[string]string) *Parser {
fs := afero.Afero{Fs: afero.NewMemMapFs()}
for filePath, contents := range files {
dirPath := path.Dir(filePath)
err := fs.MkdirAll(dirPath, os.ModePerm)
if err != nil {
panic(err)
}
err = fs.WriteFile(filePath, []byte(contents), os.ModePerm)
if err != nil {
panic(err)
}
}
return NewParser(fs)
}
// testModuleFromFile reads a single file, wraps it in a module, and returns
// it. This is a helper for use in unit tests.
func testModuleFromFile(filename string) (*Module, hcl.Diagnostics) {
parser := NewParser(nil)
f, diags := parser.LoadConfigFile(filename)
mod, modDiags := NewModule([]*File{f}, nil)
diags = append(diags, modDiags...)
return mod, modDiags
}
// testModuleConfigFrom File reads a single file from the given path as a
// module and returns its configuration. This is a helper for use in unit tests.
func testModuleConfigFromFile(filename string) (*Config, hcl.Diagnostics) {
parser := NewParser(nil)
f, diags := parser.LoadConfigFile(filename)
mod, modDiags := NewModule([]*File{f}, nil)
diags = append(diags, modDiags...)
cfg, moreDiags := BuildConfig(mod, nil)
return cfg, append(diags, moreDiags...)
}
// testModuleFromDir reads configuration from the given directory path as
// a module and returns it. This is a helper for use in unit tests.
func testModuleFromDir(path string) (*Module, hcl.Diagnostics) {
parser := NewParser(nil)
return parser.LoadConfigDir(path)
}
// testModuleFromDir reads configuration from the given directory path as a
// module and returns its configuration. This is a helper for use in unit tests.
func testModuleConfigFromDir(path string) (*Config, hcl.Diagnostics) {
parser := NewParser(nil)
mod, diags := parser.LoadConfigDir(path)
cfg, moreDiags := BuildConfig(mod, nil)
return cfg, append(diags, moreDiags...)
}
// testNestedModuleConfigFromDir reads configuration from the given directory path as
// a module with (optional) submodules and returns its configuration. This is a
// helper for use in unit tests.
func testNestedModuleConfigFromDir(t *testing.T, path string) (*Config, hcl.Diagnostics) {
t.Helper()
parser := NewParser(nil)
mod, diags := parser.LoadConfigDir(path)
assertNoDiagnostics(t, diags)
if mod == nil {
t.Fatal("got nil root module; want non-nil")
}
versionI := 0
cfg, diags := BuildConfig(mod, ModuleWalkerFunc(
func(req *ModuleRequest) (*Module, *version.Version, hcl.Diagnostics) {
// For the sake of this test we're going to just treat our
// SourceAddr as a path relative to our fixture directory.
// A "real" implementation of ModuleWalker should accept the
// various different source address syntaxes Terraform supports.
sourcePath := filepath.Join(path, req.SourceAddr)
mod, diags := parser.LoadConfigDir(sourcePath)
version, _ := version.NewVersion(fmt.Sprintf("1.0.%d", versionI))
versionI++
return mod, version, diags
},
))
return cfg, diags
}
func assertNoDiagnostics(t *testing.T, diags hcl.Diagnostics) bool {
t.Helper()
return assertDiagnosticCount(t, diags, 0)
}
func assertDiagnosticCount(t *testing.T, diags hcl.Diagnostics, want int) bool {
t.Helper()
if len(diags) != want {
t.Errorf("wrong number of diagnostics %d; want %d", len(diags), want)
for _, diag := range diags {
t.Logf("- %s", diag)
}
return true
}
return false
}
func assertDiagnosticSummary(t *testing.T, diags hcl.Diagnostics, want string) bool {
t.Helper()
for _, diag := range diags {
if diag.Summary == want {
return false
}
}
t.Errorf("missing diagnostic summary %q", want)
for _, diag := range diags {
t.Logf("- %s", diag)
}
return true
}
func assertExactDiagnostics(t *testing.T, diags hcl.Diagnostics, want []string) bool {
t.Helper()
gotDiags := map[string]bool{}
wantDiags := map[string]bool{}
for _, diag := range diags {
gotDiags[diag.Error()] = true
}
for _, msg := range want {
wantDiags[msg] = true
}
bad := false
for got := range gotDiags {
if _, exists := wantDiags[got]; !exists {
t.Errorf("unexpected diagnostic: %s", got)
bad = true
}
}
for want := range wantDiags {
if _, exists := gotDiags[want]; !exists {
t.Errorf("missing expected diagnostic: %s", want)
bad = true
}
}
return bad
}
func assertResultDeepEqual(t *testing.T, got, want interface{}) bool {
t.Helper()
if !reflect.DeepEqual(got, want) {
t.Errorf("wrong result\ngot: %swant: %s", spew.Sdump(got), spew.Sdump(want))
return true
}
return false
}
func stringPtr(s string) *string {
return &s
}