internal/encoding: support input validation
Also fixes a bug in go.go, which did not obey
the `json:"-"` field tag.
This does not yet introduce a file extension for
possible combinations like cue+data.
Closes #130
Change-Id: I03f18afb64e48d84cf6a645f5fb5f7c91299b032
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/5261
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
diff --git a/internal/encoding/encoding_test.go b/internal/encoding/encoding_test.go
new file mode 100644
index 0000000..37aa0e8
--- /dev/null
+++ b/internal/encoding/encoding_test.go
@@ -0,0 +1,86 @@
+// Copyright 2020 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 encoding
+
+import (
+ "path"
+ "strings"
+ "testing"
+
+ "cuelang.org/go/cue/build"
+ "cuelang.org/go/cue/parser"
+)
+
+func TestValidate(t *testing.T) {
+ testCases := []struct {
+ form build.Form
+ in string
+ err string
+ }{{
+ form: "data",
+ in: `
+ // Foo
+ a: 2
+ "b-b": 3
+ s: -2
+ a: +2
+ `,
+ }, {
+ form: "graph",
+ in: `
+ X=3
+ a: X
+ "b-b": 3
+ s: a
+ `,
+ },
+
+ {form: "data", err: "imports", in: `import "foo" `},
+ {form: "data", err: "references", in: `a: a`},
+ {form: "data", err: "expressions", in: `a: 1 + 3`},
+ {form: "data", err: "expressions", in: `a: 1 + 3`},
+ {form: "data", err: "definitions", in: `a :: 1`},
+ {form: "data", err: "constraints", in: `a: <1`},
+ {form: "data", err: "expressions", in: `a: !true`},
+ {form: "data", err: "expressions", in: `a: 1 | 2`},
+ {form: "data", err: "expressions", in: `a: 1 | *2`},
+ {form: "data", err: "references", in: `X=3, a: X`},
+ {form: "data", err: "expressions", in: `2+2`},
+ {form: "data", err: "expressions", in: `"\(3)"`},
+ {form: "data", err: "expressions", in: `for x in [2] { a: 2 }`},
+ {form: "data", err: "expressions", in: `a: len([])`},
+ {form: "data", err: "ellipsis", in: `a: [...]`},
+ }
+ for _, tc := range testCases {
+ t.Run(path.Join(string(tc.form), tc.in), func(t *testing.T) {
+ f, err := parser.ParseFile("", tc.in, parser.ParseComments)
+ if err != nil {
+ t.Fatal(err)
+ }
+ d := Decoder{cfg: &Config{}}
+ d.validate(f, &build.File{
+ Filename: "foo.cue",
+ Encoding: build.CUE,
+ Form: tc.form,
+ })
+ if (tc.err == "") != (d.err == nil) {
+ t.Errorf("error: got %v; want %v", tc.err == "", d.err == nil)
+ }
+ if d.err != nil && !strings.Contains(d.err.Error(), tc.err) {
+ t.Errorf("error message did not contain %q: %v", tc.err, d.err)
+ }
+ })
+ }
+}
