| // Copyright 2019 CUE 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 cuetest |
| |
| import ( |
| "bytes" |
| "context" |
| "fmt" |
| "io" |
| "os" |
| "regexp" |
| "strings" |
| "testing" |
| |
| "cuelang.org/go/cmd/cue/cmd" |
| "github.com/kylelemons/godebug/diff" |
| ) |
| |
| type Config struct { |
| Stdin io.Reader |
| Stdout io.Writer |
| Golden string |
| } |
| |
| // Run executes the given command in the given directory and reports any |
| // errors comparing it to the gold standard. |
| func Run(t *testing.T, dir, command string, cfg *Config) { |
| if cfg == nil { |
| cfg = &Config{} |
| } |
| |
| old, err := os.Getwd() |
| if err != nil { |
| t.Fatal(err) |
| } |
| if err = os.Chdir(dir); err != nil { |
| t.Fatal(err) |
| } |
| defer func() { os.Chdir(old) }() |
| |
| logf(t, "Executing command: %s", command) |
| |
| command = strings.TrimSpace(command[4:]) |
| args := SplitArgs(t, command) |
| logf(t, "Args: %q", args) |
| |
| buf := &bytes.Buffer{} |
| if cfg.Golden != "" { |
| if cfg.Stdout != nil { |
| t.Fatal("cannot set Golden and Stdout") |
| } |
| cfg.Stdout = buf |
| } |
| cmd, err := cmd.New(args) |
| if cfg.Stdout != nil { |
| cmd.SetOutput(cfg.Stdout) |
| } else { |
| cmd.SetOutput(buf) |
| } |
| if cfg.Stdin != nil { |
| cmd.SetInput(cfg.Stdin) |
| } |
| if err = cmd.Run(context.Background()); err != nil { |
| if cfg.Stdout == nil { |
| logf(t, "Ouput:\n%s", buf.String()) |
| } |
| logf(t, "Execution failed: %v", err) |
| } |
| |
| if cfg.Golden == "" { |
| return |
| } |
| |
| pattern := fmt.Sprintf("//.*%s.*", regexp.QuoteMeta(dir)) |
| re, err := regexp.Compile(pattern) |
| if err != nil { |
| t.Fatal(err) |
| } |
| got := re.ReplaceAllString(buf.String(), "") |
| got = strings.TrimSpace(got) |
| |
| want := strings.TrimSpace(cfg.Golden) |
| if got != want { |
| t.Errorf("files differ:\n%s", diff.Diff(got, want)) |
| } |
| } |
| |
| func logf(t *testing.T, format string, args ...interface{}) { |
| t.Helper() |
| t.Logf(format, args...) |
| } |
| |
| func SplitArgs(t *testing.T, s string) (args []string) { |
| c := NewChunker(t, []byte(s)) |
| for { |
| found := c.Find(" '") |
| args = append(args, strings.Split(c.Text(), " ")...) |
| if !found { |
| break |
| } |
| c.Next("", "' ") |
| args = append(args, c.Text()) |
| } |
| return args |
| } |