github.com/bazelbuild/bazel-watcher@v0.25.2/internal/ibazel/fswatcher/fsevents/fsevents_test.go (about)

     1  // Copyright 2022 The Bazel Authors. All rights reserved.
     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  //go:build darwin
    16  // +build darwin
    17  
    18  package fsevents
    19  
    20  import (
    21  	"github.com/google/go-cmp/cmp"
    22  	"testing"
    23  )
    24  
    25  func TestFindCommonRoot(t *testing.T) {
    26  	tests := []struct {
    27  		in   []string
    28  		want []string
    29  	}{
    30  		// Finds common sub-root of two directories
    31  		{
    32  			[]string{
    33  				"/a/b/c/",
    34  				"/a/d/",
    35  			},
    36  			[]string{"/a/"},
    37  		},
    38  		// Finds common sub-root of multiple recursive directories
    39  		{
    40  			[]string{
    41  				"/a/b/c",
    42  				"/a/b/c/e",
    43  				"/a/b/d/e",
    44  				"/a/b/d/f",
    45  			},
    46  			[]string{"/a/b/"},
    47  		},
    48  		// Returns the single input.
    49  		{
    50  			[]string{
    51  				"/a/b/c/",
    52  			},
    53  			[]string{"/a/b/c/"},
    54  		},
    55  		// Returns an empty slice if there are no inputs.
    56  		{
    57  			[]string{},
    58  			[]string{},
    59  		},
    60  	}
    61  	for _, test := range tests {
    62  		got, err := findCommonRoot(test.in)
    63  		if err != nil {
    64  			t.Errorf("unexpected error %v", err.Error())
    65  		}
    66  		if diff := cmp.Diff(got, test.want); diff != "" {
    67  			t.Errorf("findCommonRoot diff (-got,+want):\n%s", diff)
    68  		}
    69  	}
    70  }
    71  
    72  func TestNoCommonRootError(t *testing.T) {
    73  	_, err := findCommonRoot([]string{"/a/", "/b/"})
    74  	if err == nil {
    75  		t.Error("expected error when there is no common root")
    76  	}
    77  }