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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475package cli
import ( "os" "path/filepath" "strings" "testing")
func TestStringContents(t *testing.T) { dir := t.TempDir() file := filepath.Join(dir, "hello.md") if err := os.WriteFile(file, []byte("# hello"), 0o600); err != nil { t.Fatal(err) } empty := filepath.Join(dir, "empty.txt") if err := os.WriteFile(empty, nil, 0o600); err != nil { t.Fatal(err) } binary := filepath.Join(dir, "binary.bin") if err := os.WriteFile(binary, []byte{0xff, 0xfe, 0xfd}, 0o600); err != nil { t.Fatal(err) } oversize := filepath.Join(dir, "big.txt") f, err := os.Create(oversize) if err != nil { t.Fatal(err) } if err := f.Truncate(maxStringContents + 1); err != nil { f.Close() t.Fatal(err) } if err := f.Close(); err != nil { t.Fatal(err) }
tests := []struct { name string stdin string args []string filenameFlag string wantContents string wantFilename string wantErr bool }{ {name: "file with basename", args: []string{file}, wantContents: "# hello", wantFilename: "hello.md"}, {name: "file with flag override", args: []string{file}, filenameFlag: "custom.md", wantContents: "# hello", wantFilename: "custom.md"}, {name: "missing file", args: []string{filepath.Join(dir, "nope")}, wantErr: true}, {name: "empty file", args: []string{empty}, wantErr: true}, {name: "non-UTF-8 file", args: []string{binary}, wantErr: true}, {name: "oversize file", args: []string{oversize}, wantErr: true}, {name: "stdin without filename", stdin: "# hello", wantErr: true}, {name: "stdin with filename", stdin: "# from stdin", args: []string{"-"}, filenameFlag: "stdin.md", wantContents: "# from stdin", wantFilename: "stdin.md"}, {name: "stdin with filename but empty", args: []string{"-"}, filenameFlag: "stdin.md", wantErr: true}, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { contents, filename, err := stringContents(strings.NewReader(tt.stdin), tt.args, tt.filenameFlag) if (err != nil) != tt.wantErr { t.Fatalf("stringContents() err = %v, wantErr %v", err, tt.wantErr) } if err != nil { return } if contents != tt.wantContents { t.Errorf("contents = %q, want %q", contents, tt.wantContents) } if filename != tt.wantFilename { t.Errorf("filename = %q, want %q", filename, tt.wantFilename) } }) }}