cuelang.org/go@v0.10.1/cue/load/import_test.go (about)

     1  // Copyright 2018 The 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 load
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  	"path/filepath"
    21  	"reflect"
    22  	"testing"
    23  
    24  	"cuelang.org/go/cue/build"
    25  )
    26  
    27  func testdata(elems ...string) string {
    28  	return filepath.Join(append([]string{"testdata"}, elems...)...)
    29  }
    30  
    31  var pkgRootDir, _ = os.Getwd()
    32  
    33  func getInst(pkg, cwd string) (*build.Instance, error) {
    34  	insts := Instances([]string{pkg}, &Config{
    35  		// Set ModuleRoot as well; otherwise we walk the parent directories
    36  		// all the way to the root of the git repository, causing Go's test caching
    37  		// to never kick in, as the .git directory almost always changes.
    38  		// Moreover, it's extra work that isn't useful to the tests.
    39  		//
    40  		// Note that we can't set ModuleRoot to cwd because if ModuleRoot is
    41  		// set, the logic will only look for a module file in that exact directory.
    42  		// So we set it to the module root actually used by all the callers of getInst: ./testdata/testmod.
    43  		ModuleRoot: filepath.Join(pkgRootDir, testdata("testmod")),
    44  		Dir:        cwd,
    45  	})
    46  	if len(insts) != 1 {
    47  		return nil, fmt.Errorf("expected one instance, got %d", len(insts))
    48  	}
    49  	inst := insts[0]
    50  	return inst, inst.Err
    51  }
    52  
    53  func TestEmptyImport(t *testing.T) {
    54  	path := testdata("testmod", "hello")
    55  	p, err := getInst("", path)
    56  	if err == nil {
    57  		t.Fatal(`Import("") returned nil error.`)
    58  	}
    59  	if p == nil {
    60  		t.Fatal(`Import("") returned nil package.`)
    61  	}
    62  	if p.DisplayPath != "" {
    63  		t.Fatalf("DisplayPath=%q, want %q.", p.DisplayPath, "")
    64  	}
    65  }
    66  
    67  func TestEmptyFolderImport(t *testing.T) {
    68  	path := testdata("testmod", "empty")
    69  	_, err := getInst(".", path)
    70  	if _, ok := err.(*NoFilesError); !ok {
    71  		t.Fatalf(`Import(%q) did not return NoCUEError, but instead %#v (%v)`, path, err, err)
    72  	}
    73  }
    74  
    75  func TestMultiplePackageImport(t *testing.T) {
    76  	path := testdata("testmod", "multi")
    77  	_, err := getInst(".", path)
    78  	mpe, ok := err.(*MultiplePackageError)
    79  	if !ok {
    80  		t.Fatalf(`Import(%q) did not return MultiplePackageError, but instead %#v (%v)`, path, err, err)
    81  	}
    82  	mpe.Dir = ""
    83  	want := &MultiplePackageError{
    84  		Packages: []string{"main", "test_package"},
    85  		Files:    []string{"file.cue", "file_appengine.cue"},
    86  	}
    87  	if !reflect.DeepEqual(mpe, want) {
    88  		t.Errorf("got %#v; want %#v", mpe, want)
    89  	}
    90  }
    91  
    92  func TestLocalDirectory(t *testing.T) {
    93  	p, err := getInst(".", testdata("testmod", "hello"))
    94  	if err != nil {
    95  		t.Fatal(err)
    96  	}
    97  
    98  	if p.DisplayPath != "." {
    99  		t.Fatalf("DisplayPath=%q, want %q", p.DisplayPath, ".")
   100  	}
   101  }