github.com/solo-io/cue@v0.4.7/encoding/openapi/decode_test.go (about)

     1  // Copyright 2019 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package openapi_test
    16  
    17  import (
    18  	"bytes"
    19  	"io/ioutil"
    20  	"os"
    21  	"path"
    22  	"path/filepath"
    23  	"strings"
    24  	"testing"
    25  
    26  	"github.com/google/go-cmp/cmp"
    27  	"github.com/stretchr/testify/assert"
    28  	"golang.org/x/tools/txtar"
    29  
    30  	"github.com/solo-io/cue/cue"
    31  	"github.com/solo-io/cue/cue/errors"
    32  	"github.com/solo-io/cue/cue/format"
    33  	"github.com/solo-io/cue/encoding/json"
    34  	"github.com/solo-io/cue/encoding/openapi"
    35  	"github.com/solo-io/cue/encoding/yaml"
    36  	"github.com/solo-io/cue/internal/cuetest"
    37  )
    38  
    39  // TestDecode reads the testdata/*.txtar files, converts the contained
    40  // JSON schema to CUE and compares it against the output.
    41  //
    42  // Set CUE_UPDATE=1 to update test files with the corresponding output.
    43  func TestDecode(t *testing.T) {
    44  	err := filepath.Walk("testdata/script", func(fullpath string, info os.FileInfo, err error) error {
    45  		_ = err
    46  		if !strings.HasSuffix(fullpath, ".txtar") {
    47  			return nil
    48  		}
    49  
    50  		t.Run(fullpath, func(t *testing.T) {
    51  			a, err := txtar.ParseFile(fullpath)
    52  			if err != nil {
    53  				t.Fatal(err)
    54  			}
    55  
    56  			cfg := &openapi.Config{PkgName: "foo"}
    57  
    58  			r := &cue.Runtime{}
    59  			var in *cue.Instance
    60  			var out, errout []byte
    61  			outIndex := -1
    62  
    63  			for i, f := range a.Files {
    64  				switch path.Ext(f.Name) {
    65  				case ".json":
    66  					in, err = json.Decode(r, f.Name, f.Data)
    67  				case ".yaml":
    68  					in, err = yaml.Decode(r, f.Name, f.Data)
    69  				case ".cue":
    70  					out = f.Data
    71  					outIndex = i
    72  				case ".err":
    73  					errout = f.Data
    74  				}
    75  			}
    76  			if err != nil {
    77  				t.Fatal(err)
    78  			}
    79  
    80  			expr, err := openapi.Extract(in, cfg)
    81  			if err != nil && errout == nil {
    82  				t.Fatal(errors.Details(err, nil))
    83  			}
    84  			got := []byte(nil)
    85  			if err != nil {
    86  				got = []byte(err.Error())
    87  			}
    88  			if !cmp.Equal(errout, got) {
    89  				t.Error(cmp.Diff(string(got), string(errout)))
    90  			}
    91  
    92  			if expr != nil {
    93  				b, err := format.Node(expr, format.Simplify())
    94  				if err != nil {
    95  					t.Fatal(err)
    96  				}
    97  
    98  				// verify the generated CUE.
    99  				if _, err = r.Compile(fullpath, b); err != nil {
   100  					t.Fatal(errors.Details(err, nil))
   101  				}
   102  
   103  				b = bytes.TrimSpace(b)
   104  				out = bytes.TrimSpace(out)
   105  
   106  				if !cmp.Equal(b, out) {
   107  					if cuetest.UpdateGoldenFiles {
   108  						a.Files[outIndex].Data = b
   109  						b = txtar.Format(a)
   110  						err = ioutil.WriteFile(fullpath, b, 0644)
   111  						if err != nil {
   112  							t.Fatal(err)
   113  						}
   114  						return
   115  					}
   116  					t.Error(cmp.Diff(string(out), string(b)))
   117  				}
   118  			}
   119  		})
   120  		return nil
   121  	})
   122  	assert.NoError(t, err)
   123  }