encoding/jsonschema: initial JSON Schema to CUE conversion
This does not yet introduce the API, but merely the
conversion of JSON Schema to CUE.
Also, several things, like formats, are not yet supported.
Note that the input to the conversion is CUE itself.
This allows any of the encodings (like YAML or JSON)
to be used as a base. The conversion will preserve line
information from the original file. That is, if a YAML file
was converted to CUE, which is then converted to OpenAPI, the line information in the resulting AST
corresponds to the original YAML.
Change-Id: I512502ce3d98443a530e75f606ca3c533b0c4299
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/4604
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/encoding/jsonschema/decode_test.go b/encoding/jsonschema/decode_test.go
new file mode 100644
index 0000000..da64a24
--- /dev/null
+++ b/encoding/jsonschema/decode_test.go
@@ -0,0 +1,122 @@
+// Copyright 2019 CUE Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jsonschema
+
+import (
+ "bytes"
+ "flag"
+ "io/ioutil"
+ "os"
+ "path"
+ "path/filepath"
+ "strings"
+ "testing"
+
+ "cuelang.org/go/cue"
+ "cuelang.org/go/cue/errors"
+ "cuelang.org/go/cue/format"
+ "cuelang.org/go/encoding/json"
+ "cuelang.org/go/encoding/yaml"
+ "github.com/google/go-cmp/cmp"
+ "github.com/stretchr/testify/assert"
+ "golang.org/x/tools/txtar"
+)
+
+var update = flag.Bool("update", false, "update the test files")
+
+// TestDecode reads the testdata/*.txtar files, converts the contained
+// JSON schema to CUE and compares it against the output.
+//
+// Use the --update flag to update test files with the corresponding output.
+func TestDecode(t *testing.T) {
+ err := filepath.Walk("testdata", func(fullpath string, info os.FileInfo, err error) error {
+ _ = err
+ if !strings.HasSuffix(fullpath, ".txtar") {
+ return nil
+ }
+
+ t.Run(fullpath, func(t *testing.T) {
+ a, err := txtar.ParseFile(fullpath)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ r := &cue.Runtime{}
+ var in *cue.Instance
+ var out, errout []byte
+ outIndex := -1
+
+ for i, f := range a.Files {
+ switch path.Ext(f.Name) {
+ case ".json":
+ in, err = json.Decode(r, f.Name, f.Data)
+ case ".yaml":
+ in, err = yaml.Decode(r, f.Name, f.Data)
+ case ".cue":
+ out = f.Data
+ outIndex = i
+ case ".err":
+ errout = f.Data
+ }
+ }
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ // TODO: use actual API.
+ expr, err := decode(fullpath, in)
+ if err != nil && errout == nil {
+ t.Fatal(errors.Details(err, nil))
+ }
+ got := []byte(nil)
+ if err != nil {
+ got = []byte(err.Error())
+ }
+ if !cmp.Equal(errout, got) {
+ t.Error(cmp.Diff(string(got), string(errout)))
+ }
+
+ if expr != nil {
+ b, err := format.Node(expr, format.Simplify())
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ // verify the generated CUE.
+ if _, err = r.Compile(fullpath, b); err != nil {
+ t.Fatal(errors.Details(err, nil))
+ }
+
+ b = bytes.TrimSpace(b)
+ out = bytes.TrimSpace(out)
+
+ if !cmp.Equal(b, out) {
+ if *update {
+ a.Files[outIndex].Data = b
+ b = txtar.Format(a)
+ err = ioutil.WriteFile(fullpath, b, 0644)
+ if err != nil {
+ t.Fatal(err)
+ }
+ return
+ }
+ t.Error(cmp.Diff(string(out), string(b)))
+ }
+ }
+ })
+ return nil
+ })
+ assert.NoError(t, err)
+}
