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// Copyright 2021 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 cue_test
import (
"bytes"
"testing"
"cuelang.org/go/cue"
"cuelang.org/go/internal/diff"
)
func TestLookupPath(t *testing.T) {
r := &cue.Runtime{}
testCases := []struct {
in string
path cue.Path
out string `test:"update"` // :nerdSnipe:
err string `test:"update"` // :nerdSnipe:
}{{
in: `
#V: {
x: int
}
#X: {
[string]: int64
} & #V
v: #X
`,
path: cue.ParsePath("v.x"),
out: `int64`,
}, {
in: `#foo: 3`,
path: cue.ParsePath("#foo"),
out: `3`,
}, {
in: `_foo: 3`,
path: cue.MakePath(cue.Def("_foo")),
err: `field "#_foo" not found`,
}, {
in: `_#foo: 3`,
path: cue.MakePath(cue.Def("_#foo")),
err: `field "_#foo" not found`,
}, {
in: `"foo", #foo: 3`,
path: cue.ParsePath("#foo"),
out: `3`,
}, {
in: `
a: [...int]
`,
path: cue.MakePath(cue.Str("a"), cue.AnyIndex),
out: `int`,
}, {
in: `
[Name=string]: { a: Name }
`,
path: cue.MakePath(cue.AnyString, cue.Str("a")),
out: `string`,
}, {
in: `
[Name=string]: { a: Name }
`,
path: cue.MakePath(cue.Str("b").Optional(), cue.Str("a")),
out: `"b"`,
}, {
in: `
[Name=string]: { a: Name }
`,
path: cue.MakePath(cue.AnyString),
out: `{a: string}`,
}, {
in: `
a: [Foo=string]: [Bar=string]: { b: Foo+Bar }
`,
path: cue.MakePath(cue.Str("a"), cue.Str("b"), cue.Str("c")).Optional(),
out: `{b: "bc"}`,
}, {
in: `
a: [Foo=string]: b: [Bar=string]: { c: Foo }
a: foo: b: [Bar=string]: { d: Bar }
`,
path: cue.MakePath(cue.Str("a"), cue.Str("foo"), cue.Str("b"), cue.AnyString),
out: `{c: "foo", d: string}`,
}, {
in: `
[Name=string]: { a: Name }
`,
path: cue.MakePath(cue.Str("a")),
err: `field "a" not found`,
}}
for _, tc := range testCases {
t.Run(tc.path.String(), func(t *testing.T) {
v := compileT(t, r, tc.in)
v = v.LookupPath(tc.path)
if err := v.Err(); err != nil || tc.err != "" {
if got := err.Error(); got != tc.err {
t.Errorf("error: got %v; want %v", got, tc.err)
}
}
if exists := v.Exists(); exists != (tc.err == "") {
t.Fatalf("exists: got %v; want: %v", exists, tc.err == "")
} else if !exists {
return
}
w := compileT(t, r, tc.out)
if k, d := diff.Diff(v, w); k != diff.Identity {
b := &bytes.Buffer{}
diff.Print(b, d)
t.Error(b)
}
})
}
}
func compileT(t *testing.T, r *cue.Runtime, s string) cue.Value {
t.Helper()
inst, err := r.Compile("", s)
if err != nil {
t.Fatal(err)
}
return inst.Value()
}