lucicfg/output_test.go - infra/luci/luci-go - Git at Google

 // Copyright 2019 The LUCI Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 package lucicfg

 import (
 	"context"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"

 	. "github.com/smartystreets/goconvey/convey"
 )

 func TestOutput(t *testing.T) {
 	t.Parallel()

 	ctx := context.Background()

 	Convey("With temp dir", t, func() {
 		tmp, err := ioutil.TempDir("", "lucicfg")
 		So(err, ShouldBeNil)
 		defer os.RemoveAll(tmp)

 		path := func(p string) string {
 			return filepath.Join(tmp, filepath.FromSlash(p))
 		}

 		read := func(p string) string {
 			body, err := ioutil.ReadFile(path(p))
 			So(err, ShouldBeNil)
 			return string(body)
 		}

 		write := func(p, body string) {
 			So(ioutil.WriteFile(path(p), []byte(body), 0600), ShouldBeNil)
 		}

 		original := map[string][]byte{
 			"a.cfg":        []byte("a\n"),
 			"subdir/b.cfg": []byte("b\n"),
 		}
 		So(os.Mkdir(path("subdir"), 0700), ShouldBeNil)
 		for k, v := range original {
 			write(k, string(v))
 		}

 		Convey("Writing", func() {
 			out := Output{
 				Data: map[string]Datum{
 					"a":     BlobDatum("111"),
 					"dir/a": BlobDatum("222"),
 				},
 			}
 			changed, unchanged, err := out.Write(tmp, false)
 			So(changed, ShouldResemble, []string{"a", "dir/a"})
 			So(unchanged, ShouldHaveLength, 0)
 			So(err, ShouldBeNil)

 			So(read("a"), ShouldResemble, "111")
 			So(read("dir/a"), ShouldResemble, "222")

 			out.Data["a"] = BlobDatum("333")
 			changed, unchanged, err = out.Write(tmp, false)
 			So(changed, ShouldResemble, []string{"a"})
 			So(unchanged, ShouldResemble, []string{"dir/a"})
 			So(err, ShouldBeNil)

 			So(read("a"), ShouldResemble, "333")
 		})

 		Convey("DiscardChangesToUntracked", func() {
 			generated := func() Output {
 				return Output{
 					Data: map[string]Datum{
 						"a.cfg":        BlobDatum("new a\n"),
 						"subdir/b.cfg": BlobDatum("new b\n"),
 					},
 				}
 			}

 			Convey("No untracked", func() {
 				out := generated()
 				So(out.DiscardChangesToUntracked(ctx, []string{"**/*"}, "-"), ShouldBeNil)
 				So(out.Data, ShouldResemble, generated().Data)
 			})

 			Convey("Untracked files are restored from disk", func() {
 				out := generated()
 				So(out.DiscardChangesToUntracked(ctx, []string{"!*/b.cfg"}, tmp), ShouldBeNil)
 				So(out.Data, ShouldResemble, map[string]Datum{
 					"a.cfg":        generated().Data["a.cfg"],
 					"subdir/b.cfg": BlobDatum(original["subdir/b.cfg"]),
 				})
 			})

 			Convey("Untracked files are discarded when dumping to stdout", func() {
 				out := generated()
 				So(out.DiscardChangesToUntracked(ctx, []string{"!*/b.cfg"}, "-"), ShouldBeNil)
 				So(out.Data, ShouldResemble, map[string]Datum{
 					"a.cfg": generated().Data["a.cfg"],
 				})
 			})

 			Convey("Untracked files are discarded if don't exist on disk", func() {
 				out := Output{
 					Data: map[string]Datum{
 						"c.cfg": BlobDatum("generated"),
 					},
 				}
 				So(out.DiscardChangesToUntracked(ctx, []string{"!c.cfg"}, tmp), ShouldBeNil)
 				So(out.Data, ShouldHaveLength, 0)
 			})
 		})

 		Convey("Reading", func() {
 			out := Output{
 				Data: map[string]Datum{
 					"m1": BlobDatum("111"),
 					"m2": BlobDatum("222"),
 				},
 			}

 			Convey("Success", func() {
 				write("m1", "new 1")
 				write("m2", "new 2")

 				So(out.Read(tmp), ShouldBeNil)
 				So(out.Data, ShouldResemble, map[string]Datum{
 					"m1": BlobDatum("new 1"),
 					"m2": BlobDatum("new 2"),
 				})
 			})

 			Convey("Missing file", func() {
 				write("m1", "new 1")
 				So(out.Read(tmp), ShouldNotBeNil)
 			})
 		})

 		Convey("Compares protos semantically", func() {
 			// Write the initial version.
 			out := Output{
 				Data: map[string]Datum{
 					"m1": &MessageDatum{Header: "", Message: testMessage(111, 0)},
 					"m2": &MessageDatum{Header: "# Header\n", Message: testMessage(222, 0)},
 				},
 			}
 			changed, unchanged, err := out.Write(tmp, false)
 			So(changed, ShouldResemble, []string{"m1", "m2"})
 			So(unchanged, ShouldHaveLength, 0)
 			So(err, ShouldBeNil)

 			So(read("m1"), ShouldResemble, "i: 111\n")
 			So(read("m2"), ShouldResemble, "# Header\ni: 222\n")

 			Convey("Ignores formatting", func() {
 				// Mutate m2 in insignificant way (strip the header).
 				write("m2", "i:     222")

 				// If using semantic comparison, recognizes nothing has changed.
 				cmp, err := out.Compare(tmp, true)
 				So(err, ShouldBeNil)
 				So(cmp, ShouldResemble, map[string]CompareResult{
 					"m1": Identical,
 					"m2": SemanticallyEqual,
 				})

 				// Byte-to-byte comparison recognizes the change.
 				cmp, err = out.Compare(tmp, false)
 				So(err, ShouldBeNil)
 				So(cmp, ShouldResemble, map[string]CompareResult{
 					"m1": Identical,
 					"m2": Different,
 				})

 				Convey("Write, force=false", func() {
 					// Output didn't really change, so nothing is overwritten.
 					changed, unchanged, err := out.Write(tmp, false)
 					So(err, ShouldBeNil)
 					So(changed, ShouldHaveLength, 0)
 					So(unchanged, ShouldResemble, []string{"m1", "m2"})
 				})

 				Convey("Write, force=true", func() {
 					// We ask to overwrite files even if they all are semantically same.
 					changed, unchanged, err := out.Write(tmp, true)
 					So(err, ShouldBeNil)
 					So(changed, ShouldResemble, []string{"m2"})
 					So(unchanged, ShouldResemble, []string{"m1"})

 					// Overwrote it on disk.
 					So(read("m2"), ShouldResemble, "# Header\ni: 222\n")
 				})
 			})

 			Convey("Detects real changes", func() {
 				// Overwrite m2 with something semantically different.
 				write("m2", "i: 333")

 				// Detected it.
 				cmp, err := out.Compare(tmp, true)
 				So(err, ShouldBeNil)
 				So(cmp, ShouldResemble, map[string]CompareResult{
 					"m1": Identical,
 					"m2": Different,
 				})

 				// Writes it to disk, even when force=false.
 				changed, unchanged, err := out.Write(tmp, false)
 				So(err, ShouldBeNil)
 				So(changed, ShouldResemble, []string{"m2"})
 				So(unchanged, ShouldResemble, []string{"m1"})
 			})

 			Convey("Handles bad protos", func() {
 				// Overwrite m2 with some garbage.
 				write("m2", "not a text proto")

 				// Detected the file as changed.
 				cmp, err := out.Compare(tmp, true)
 				So(err, ShouldBeNil)
 				So(cmp, ShouldResemble, map[string]CompareResult{
 					"m1": Identical,
 					"m2": Different,
 				})
 			})
 		})
 	})

 	Convey("ConfigSets", t, func() {
 		out := Output{
 			Data: map[string]Datum{
 				"f1":          BlobDatum("0"),
 				"dir1/f2":     BlobDatum("1"),
 				"dir1/f3":     BlobDatum("2"),
 				"dir1/sub/f4": BlobDatum("3"),
 				"dir2/f5":     BlobDatum("4"),
 			},
 			Roots: map[string]string{},
 		}

 		// Same data, as raw bytes.
 		everything := map[string][]byte{}
 		for k, v := range out.Data {
 			everything[k], _ = v.Bytes()
 		}

 		configSets := func() []ConfigSet {
 			cs, err := out.ConfigSets()
 			So(err, ShouldBeNil)
 			return cs
 		}

 		Convey("No roots", func() {
 			So(configSets(), ShouldHaveLength, 0)
 		})

 		Convey("Empty set", func() {
 			out.Roots["set"] = "zzz"
 			So(configSets(), ShouldResemble, []ConfigSet{
 				{
 					Name: "set",
 					Data: map[string][]byte{},
 				},
 			})
 		})

 		Convey("`.` root", func() {
 			out.Roots["set"] = "."
 			So(configSets(), ShouldResemble, []ConfigSet{
 				{
 					Name: "set",
 					Data: everything,
 				},
 			})
 		})

 		Convey("Subdir root", func() {
 			out.Roots["set"] = "dir1/."
 			So(configSets(), ShouldResemble, []ConfigSet{
 				{
 					Name: "set",
 					Data: map[string][]byte{
 						"f2":     []byte("1"),
 						"f3":     []byte("2"),
 						"sub/f4": []byte("3"),
 					},
 				},
 			})
 		})

 		Convey("Multiple roots", func() {
 			out.Roots["set1"] = "dir1"
 			out.Roots["set2"] = "dir2"
 			out.Roots["set3"] = "dir1/sub" // intersecting sets are OK
 			So(configSets(), ShouldResemble, []ConfigSet{
 				{
 					Name: "set1",
 					Data: map[string][]byte{
 						"f2":     []byte("1"),
 						"f3":     []byte("2"),
 						"sub/f4": []byte("3"),
 					},
 				},
 				{
 					Name: "set2",
 					Data: map[string][]byte{
 						"f5": []byte("4"),
 					},
 				},
 				{
 					Name: "set3",
 					Data: map[string][]byte{
 						"f4": []byte("3"),
 					},
 				},
 			})
 		})
 	})
 }
	// Copyright 2019 The LUCI Authors.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	package lucicfg

	import (
	"context"
	"io/ioutil"
	"os"
	"path/filepath"
	"testing"

	. "github.com/smartystreets/goconvey/convey"
	)

	func TestOutput(t *testing.T) {
	t.Parallel()

	ctx := context.Background()

	Convey("With temp dir", t, func() {
	tmp, err := ioutil.TempDir("", "lucicfg")
	So(err, ShouldBeNil)
	defer os.RemoveAll(tmp)

	path := func(p string) string {
	return filepath.Join(tmp, filepath.FromSlash(p))
	}

	read := func(p string) string {
	body, err := ioutil.ReadFile(path(p))
	So(err, ShouldBeNil)
	return string(body)
	}

	write := func(p, body string) {
	So(ioutil.WriteFile(path(p), []byte(body), 0600), ShouldBeNil)
	}

	original := map[string][]byte{
	"a.cfg": []byte("a\n"),
	"subdir/b.cfg": []byte("b\n"),
	}
	So(os.Mkdir(path("subdir"), 0700), ShouldBeNil)
	for k, v := range original {
	write(k, string(v))
	}

	Convey("Writing", func() {
	out := Output{
	Data: map[string]Datum{
	"a": BlobDatum("111"),
	"dir/a": BlobDatum("222"),
	},
	}
	changed, unchanged, err := out.Write(tmp, false)
	So(changed, ShouldResemble, []string{"a", "dir/a"})
	So(unchanged, ShouldHaveLength, 0)
	So(err, ShouldBeNil)

	So(read("a"), ShouldResemble, "111")
	So(read("dir/a"), ShouldResemble, "222")

	out.Data["a"] = BlobDatum("333")
	changed, unchanged, err = out.Write(tmp, false)
	So(changed, ShouldResemble, []string{"a"})
	So(unchanged, ShouldResemble, []string{"dir/a"})
	So(err, ShouldBeNil)

	So(read("a"), ShouldResemble, "333")
	})

	Convey("DiscardChangesToUntracked", func() {
	generated := func() Output {
	return Output{
	Data: map[string]Datum{
	"a.cfg": BlobDatum("new a\n"),
	"subdir/b.cfg": BlobDatum("new b\n"),
	},
	}
	}

	Convey("No untracked", func() {
	out := generated()
	So(out.DiscardChangesToUntracked(ctx, []string{"*/"}, "-"), ShouldBeNil)
	So(out.Data, ShouldResemble, generated().Data)
	})

	Convey("Untracked files are restored from disk", func() {
	out := generated()
	So(out.DiscardChangesToUntracked(ctx, []string{"!*/b.cfg"}, tmp), ShouldBeNil)
	So(out.Data, ShouldResemble, map[string]Datum{
	"a.cfg": generated().Data["a.cfg"],
	"subdir/b.cfg": BlobDatum(original["subdir/b.cfg"]),
	})
	})

	Convey("Untracked files are discarded when dumping to stdout", func() {
	out := generated()
	So(out.DiscardChangesToUntracked(ctx, []string{"!*/b.cfg"}, "-"), ShouldBeNil)
	So(out.Data, ShouldResemble, map[string]Datum{
	"a.cfg": generated().Data["a.cfg"],
	})
	})

	Convey("Untracked files are discarded if don't exist on disk", func() {
	out := Output{
	Data: map[string]Datum{
	"c.cfg": BlobDatum("generated"),
	},
	}
	So(out.DiscardChangesToUntracked(ctx, []string{"!c.cfg"}, tmp), ShouldBeNil)
	So(out.Data, ShouldHaveLength, 0)
	})
	})

	Convey("Reading", func() {
	out := Output{
	Data: map[string]Datum{
	"m1": BlobDatum("111"),
	"m2": BlobDatum("222"),
	},
	}

	Convey("Success", func() {
	write("m1", "new 1")
	write("m2", "new 2")

	So(out.Read(tmp), ShouldBeNil)
	So(out.Data, ShouldResemble, map[string]Datum{
	"m1": BlobDatum("new 1"),
	"m2": BlobDatum("new 2"),
	})
	})

	Convey("Missing file", func() {
	write("m1", "new 1")
	So(out.Read(tmp), ShouldNotBeNil)
	})
	})

	Convey("Compares protos semantically", func() {
	// Write the initial version.
	out := Output{
	Data: map[string]Datum{
	"m1": &MessageDatum{Header: "", Message: testMessage(111, 0)},
	"m2": &MessageDatum{Header: "# Header\n", Message: testMessage(222, 0)},
	},
	}
	changed, unchanged, err := out.Write(tmp, false)
	So(changed, ShouldResemble, []string{"m1", "m2"})
	So(unchanged, ShouldHaveLength, 0)
	So(err, ShouldBeNil)

	So(read("m1"), ShouldResemble, "i: 111\n")
	So(read("m2"), ShouldResemble, "# Header\ni: 222\n")

	Convey("Ignores formatting", func() {
	// Mutate m2 in insignificant way (strip the header).
	write("m2", "i: 222")

	// If using semantic comparison, recognizes nothing has changed.
	cmp, err := out.Compare(tmp, true)
	So(err, ShouldBeNil)
	So(cmp, ShouldResemble, map[string]CompareResult{
	"m1": Identical,
	"m2": SemanticallyEqual,
	})

	// Byte-to-byte comparison recognizes the change.
	cmp, err = out.Compare(tmp, false)
	So(err, ShouldBeNil)
	So(cmp, ShouldResemble, map[string]CompareResult{
	"m1": Identical,
	"m2": Different,
	})

	Convey("Write, force=false", func() {
	// Output didn't really change, so nothing is overwritten.
	changed, unchanged, err := out.Write(tmp, false)
	So(err, ShouldBeNil)
	So(changed, ShouldHaveLength, 0)
	So(unchanged, ShouldResemble, []string{"m1", "m2"})
	})

	Convey("Write, force=true", func() {
	// We ask to overwrite files even if they all are semantically same.
	changed, unchanged, err := out.Write(tmp, true)
	So(err, ShouldBeNil)
	So(changed, ShouldResemble, []string{"m2"})
	So(unchanged, ShouldResemble, []string{"m1"})

	// Overwrote it on disk.
	So(read("m2"), ShouldResemble, "# Header\ni: 222\n")
	})
	})

	Convey("Detects real changes", func() {
	// Overwrite m2 with something semantically different.
	write("m2", "i: 333")

	// Detected it.
	cmp, err := out.Compare(tmp, true)
	So(err, ShouldBeNil)
	So(cmp, ShouldResemble, map[string]CompareResult{
	"m1": Identical,
	"m2": Different,
	})

	// Writes it to disk, even when force=false.
	changed, unchanged, err := out.Write(tmp, false)
	So(err, ShouldBeNil)
	So(changed, ShouldResemble, []string{"m2"})
	So(unchanged, ShouldResemble, []string{"m1"})
	})

	Convey("Handles bad protos", func() {
	// Overwrite m2 with some garbage.
	write("m2", "not a text proto")

	// Detected the file as changed.
	cmp, err := out.Compare(tmp, true)
	So(err, ShouldBeNil)
	So(cmp, ShouldResemble, map[string]CompareResult{
	"m1": Identical,
	"m2": Different,
	})
	})
	})
	})

	Convey("ConfigSets", t, func() {
	out := Output{
	Data: map[string]Datum{
	"f1": BlobDatum("0"),
	"dir1/f2": BlobDatum("1"),
	"dir1/f3": BlobDatum("2"),
	"dir1/sub/f4": BlobDatum("3"),
	"dir2/f5": BlobDatum("4"),
	},
	Roots: map[string]string{},
	}

	// Same data, as raw bytes.
	everything := map[string][]byte{}
	for k, v := range out.Data {
	everything[k], _ = v.Bytes()
	}

	configSets := func() []ConfigSet {
	cs, err := out.ConfigSets()
	So(err, ShouldBeNil)
	return cs
	}

	Convey("No roots", func() {
	So(configSets(), ShouldHaveLength, 0)
	})

	Convey("Empty set", func() {
	out.Roots["set"] = "zzz"
	So(configSets(), ShouldResemble, []ConfigSet{
	{
	Name: "set",
	Data: map[string][]byte{},
	},
	})
	})

	Convey("`.` root", func() {
	out.Roots["set"] = "."
	So(configSets(), ShouldResemble, []ConfigSet{
	{
	Name: "set",
	Data: everything,
	},
	})
	})

	Convey("Subdir root", func() {
	out.Roots["set"] = "dir1/."
	So(configSets(), ShouldResemble, []ConfigSet{
	{
	Name: "set",
	Data: map[string][]byte{
	"f2": []byte("1"),
	"f3": []byte("2"),
	"sub/f4": []byte("3"),
	},
	},
	})
	})

	Convey("Multiple roots", func() {
	out.Roots["set1"] = "dir1"
	out.Roots["set2"] = "dir2"
	out.Roots["set3"] = "dir1/sub" // intersecting sets are OK
	So(configSets(), ShouldResemble, []ConfigSet{
	{
	Name: "set1",
	Data: map[string][]byte{
	"f2": []byte("1"),
	"f3": []byte("2"),
	"sub/f4": []byte("3"),
	},
	},
	{
	Name: "set2",
	Data: map[string][]byte{
	"f5": []byte("4"),
	},
	},
	{
	Name: "set3",
	Data: map[string][]byte{
	"f4": []byte("3"),
	},
	},
	})
	})
	})
	}