cuelang.org/go@v0.10.1/tools/trim/trim_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 trim
    16  
    17  import (
    18  	"testing"
    19  
    20  	"cuelang.org/go/cue/build"
    21  	"cuelang.org/go/cue/errors"
    22  	"cuelang.org/go/internal/cuetdtest"
    23  	"cuelang.org/go/internal/cuetxtar"
    24  	"github.com/go-quicktest/qt"
    25  )
    26  
    27  var (
    28  	// TODO(evalv3): many broken tests in new evaluator, use FullMatrix to
    29  	// expose. This is probably due to the changed underlying representation.
    30  	// matrix = cuetdtest.FullMatrix
    31  	matrix = cuetdtest.DefaultOnlyMatrix
    32  )
    33  
    34  const trace = false
    35  
    36  func TestTrimFiles(t *testing.T) {
    37  	test := cuetxtar.TxTarTest{
    38  		Root:   "./testdata",
    39  		Name:   "trim",
    40  		Matrix: matrix,
    41  	}
    42  
    43  	test.Run(t, func(t *cuetxtar.Test) {
    44  
    45  		a := t.Instance()
    46  		ctx := t.Context()
    47  		val := ctx.BuildInstance(a)
    48  		// Note: don't require val.Err to be nil because there are deliberate
    49  		// errors in some tests, to ensure trim still works even with some errors.
    50  		hadError := val.Err() != nil
    51  
    52  		files := a.Files
    53  
    54  		err := Files(files, val, &Config{Trace: trace})
    55  		if err != nil {
    56  			t.WriteErrors(errors.Promote(err, ""))
    57  		}
    58  
    59  		// If the files could be built without an error before,
    60  		// they should still build without an error after trimming.
    61  		// This might not be true if, for example, unused imports are not removed.
    62  		// Note that we need a new build.Instance to build the ast.Files from scratch again.
    63  		if !hadError {
    64  			a := build.NewContext().NewInstance("", nil)
    65  			for _, file := range files {
    66  				a.AddSyntax(file)
    67  			}
    68  			val := ctx.BuildInstance(a)
    69  			qt.Assert(t, qt.IsNil(val.Err()))
    70  		}
    71  
    72  		for _, f := range files {
    73  			t.WriteFile(f)
    74  		}
    75  	})
    76  }