crossplane

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/*
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Copyright 2020 The Crossplane Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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	http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package xpkg
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import (
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	"os"
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	"testing"
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	"github.com/google/go-cmp/cmp"
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	"github.com/spf13/afero"
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	"github.com/crossplane/crossplane-runtime/pkg/errors"
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	"github.com/crossplane/crossplane-runtime/pkg/test"
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)
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func TestFindXpkgInDir(t *testing.T) {
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	match := afero.NewMemMapFs()
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	_ = afero.WriteFile(match, "one.xpkg", []byte{}, StreamFileMode)
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	multi := afero.NewMemMapFs()
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	_ = afero.WriteFile(multi, "one.xpkg", []byte{}, StreamFileMode)
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	_ = afero.WriteFile(multi, "two.xpkg", []byte{}, StreamFileMode)
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	type args struct {
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		root string
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		fs   afero.Fs
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	}
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	type want struct {
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		path string
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		err  error
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	}
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	cases := map[string]struct {
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		reason string
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		args   args
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		want   want
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	}{
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		"NoMatch": {
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			reason: "We should return an error if no matches.",
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			args: args{
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				root: ".",
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				fs:   afero.NewMemMapFs(),
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			},
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			want: want{
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				err: errors.New(errNoMatch),
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			},
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		},
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		"MultiMatch": {
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			reason: "We should return an error if multiple matches.",
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			args: args{
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				root: ".",
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				fs:   multi,
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			},
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			want: want{
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				err: errors.New(errMultiMatch),
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			},
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		},
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		"NotExist": {
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			reason: "We should return an error root does not exist.",
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			args: args{
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				root: "/test",
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				fs:   afero.NewMemMapFs(),
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			},
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			want: want{
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				err: &os.PathError{Op: "open", Path: "/test", Err: os.ErrNotExist},
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			},
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		},
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		"NotDir": {
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			reason: "We should return an error if root is not a directory.",
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			args: args{
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				root: "one.xpkg",
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				fs:   multi,
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			},
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			want: want{
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				err: &os.PathError{Op: "readdir", Path: "one.xpkg", Err: errors.New("not a dir")},
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			},
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		},
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		"Successful": {
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			reason: "We should return file path if one package exists.",
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			args: args{
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				root: ".",
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				fs:   match,
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			},
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			want: want{
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				path: "one.xpkg",
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			},
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		},
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	}
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	for name, tc := range cases {
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		t.Run(name, func(t *testing.T) {
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			path, err := FindXpkgInDir(tc.args.fs, tc.args.root)
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			if diff := cmp.Diff(tc.want.err, err, test.EquateErrors()); diff != "" {
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				t.Errorf("\n%s\nFindXpkgInDir(...): -want, +got:\n%s", tc.reason, diff)
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			}
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			if diff := cmp.Diff(tc.want.path, path); diff != "" {
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				t.Errorf("\n%s\nFindXpkgInDir(...): -want, +got:\n%s", tc.reason, diff)
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			}
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		})
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	}
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}
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