package pq import ( "bytes" "database/sql" "fmt" "strings" "testing" "time" "github.com/lib/pq/oid" ) func TestScanTimestamp(t *testing.T) { var nt NullTime tn := time.Now() nt.Scan(tn) if !nt.Valid { t.Errorf("Expected Valid=false") } if nt.Time != tn { t.Errorf("Time value mismatch") } } func TestScanNilTimestamp(t *testing.T) { var nt NullTime nt.Scan(nil) if nt.Valid { t.Errorf("Expected Valid=false") } } var timeTests = []struct { str string timeval time.Time }{ {"22001-02-03", time.Date(22001, time.February, 3, 0, 0, 0, 0, time.FixedZone("", 0))}, {"2001-02-03", time.Date(2001, time.February, 3, 0, 0, 0, 0, time.FixedZone("", 0))}, {"0001-12-31 BC", time.Date(0, time.December, 31, 0, 0, 0, 0, time.FixedZone("", 0))}, {"2001-02-03 BC", time.Date(-2000, time.February, 3, 0, 0, 0, 0, time.FixedZone("", 0))}, {"2001-02-03 04:05:06", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.000001", time.Date(2001, time.February, 3, 4, 5, 6, 1000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.00001", time.Date(2001, time.February, 3, 4, 5, 6, 10000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.0001", time.Date(2001, time.February, 3, 4, 5, 6, 100000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.001", time.Date(2001, time.February, 3, 4, 5, 6, 1000000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.01", time.Date(2001, time.February, 3, 4, 5, 6, 10000000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.1", time.Date(2001, time.February, 3, 4, 5, 6, 100000000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.12", time.Date(2001, time.February, 3, 4, 5, 6, 120000000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.123", time.Date(2001, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.1234", time.Date(2001, time.February, 3, 4, 5, 6, 123400000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.12345", time.Date(2001, time.February, 3, 4, 5, 6, 123450000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.123456", time.Date(2001, time.February, 3, 4, 5, 6, 123456000, time.FixedZone("", 0))}, {"2001-02-03 04:05:06.123-07", time.Date(2001, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", -7*60*60))}, {"2001-02-03 04:05:06-07", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -7*60*60))}, {"2001-02-03 04:05:06-07:42", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+42*60)))}, {"2001-02-03 04:05:06-07:30:09", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9)))}, {"2001-02-03 04:05:06+07", time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", 7*60*60))}, {"0011-02-03 04:05:06 BC", time.Date(-10, time.February, 3, 4, 5, 6, 0, time.FixedZone("", 0))}, {"0011-02-03 04:05:06.123 BC", time.Date(-10, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))}, {"0011-02-03 04:05:06.123-07 BC", time.Date(-10, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", -7*60*60))}, {"0001-02-03 04:05:06.123", time.Date(1, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))}, {"0001-02-03 04:05:06.123 BC", time.Date(1, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0)).AddDate(-1, 0, 0)}, {"0001-02-03 04:05:06.123 BC", time.Date(0, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))}, {"0002-02-03 04:05:06.123 BC", time.Date(0, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0)).AddDate(-1, 0, 0)}, {"0002-02-03 04:05:06.123 BC", time.Date(-1, time.February, 3, 4, 5, 6, 123000000, time.FixedZone("", 0))}, {"12345-02-03 04:05:06.1", time.Date(12345, time.February, 3, 4, 5, 6, 100000000, time.FixedZone("", 0))}, {"123456-02-03 04:05:06.1", time.Date(123456, time.February, 3, 4, 5, 6, 100000000, time.FixedZone("", 0))}, } // Test that parsing the string results in the expected value. func TestParseTs(t *testing.T) { for i, tt := range timeTests { val, err := ParseTimestamp(nil, tt.str) if err != nil { t.Errorf("%d: got error: %v", i, err) } else if val.String() != tt.timeval.String() { t.Errorf("%d: expected to parse %q into %q; got %q", i, tt.str, tt.timeval, val) } } } var timeErrorTests = []string{ "BC", " BC", "2001", "2001-2-03", "2001-02-3", "2001-02-03 ", "2001-02-03 B", "2001-02-03 04", "2001-02-03 04:", "2001-02-03 04:05", "2001-02-03 04:05 B", "2001-02-03 04:05 BC", "2001-02-03 04:05:", "2001-02-03 04:05:6", "2001-02-03 04:05:06 B", "2001-02-03 04:05:06BC", "2001-02-03 04:05:06.123 B", } // Test that parsing the string results in an error. func TestParseTsErrors(t *testing.T) { for i, tt := range timeErrorTests { _, err := ParseTimestamp(nil, tt) if err == nil { t.Errorf("%d: expected an error from parsing: %v", i, tt) } } } // Now test that sending the value into the database and parsing it back // returns the same time.Time value. func TestEncodeAndParseTs(t *testing.T) { db, err := openTestConnConninfo("timezone='Etc/UTC'") if err != nil { t.Fatal(err) } defer db.Close() for i, tt := range timeTests { var dbstr string err = db.QueryRow("SELECT ($1::timestamptz)::text", tt.timeval).Scan(&dbstr) if err != nil { t.Errorf("%d: could not send value %q to the database: %s", i, tt.timeval, err) continue } val, err := ParseTimestamp(nil, dbstr) if err != nil { t.Errorf("%d: could not parse value %q: %s", i, dbstr, err) continue } val = val.In(tt.timeval.Location()) if val.String() != tt.timeval.String() { t.Errorf("%d: expected to parse %q into %q; got %q", i, dbstr, tt.timeval, val) } } } var formatTimeTests = []struct { time time.Time expected string }{ {time.Time{}, "0001-01-01 00:00:00Z"}, {time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "2001-02-03 04:05:06.123456789Z"}, {time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "2001-02-03 04:05:06.123456789+02:00"}, {time.Date(2001, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "2001-02-03 04:05:06.123456789-06:00"}, {time.Date(2001, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "2001-02-03 04:05:06-07:30:09"}, {time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03 04:05:06.123456789Z"}, {time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03 04:05:06.123456789+02:00"}, {time.Date(1, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03 04:05:06.123456789-06:00"}, {time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 0)), "0001-02-03 04:05:06.123456789Z BC"}, {time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", 2*60*60)), "0001-02-03 04:05:06.123456789+02:00 BC"}, {time.Date(0, time.February, 3, 4, 5, 6, 123456789, time.FixedZone("", -6*60*60)), "0001-02-03 04:05:06.123456789-06:00 BC"}, {time.Date(1, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03 04:05:06-07:30:09"}, {time.Date(0, time.February, 3, 4, 5, 6, 0, time.FixedZone("", -(7*60*60+30*60+9))), "0001-02-03 04:05:06-07:30:09 BC"}, } func TestFormatTs(t *testing.T) { for i, tt := range formatTimeTests { val := string(formatTs(tt.time)) if val != tt.expected { t.Errorf("%d: incorrect time format %q, want %q", i, val, tt.expected) } } } func TestFormatTsBackend(t *testing.T) { db := openTestConn(t) defer db.Close() var str string err := db.QueryRow("SELECT '2001-02-03T04:05:06.007-08:09:10'::time::text").Scan(&str) if err == nil { t.Fatalf("PostgreSQL is accepting an ISO timestamp input for time") } for i, tt := range formatTimeTests { for _, typ := range []string{"date", "time", "timetz", "timestamp", "timestamptz"} { err = db.QueryRow("SELECT $1::"+typ+"::text", tt.time).Scan(&str) if err != nil { t.Errorf("%d: incorrect time format for %v on the backend: %v", i, typ, err) } } } } func TestTimestampWithTimeZone(t *testing.T) { db := openTestConn(t) defer db.Close() tx, err := db.Begin() if err != nil { t.Fatal(err) } defer tx.Rollback() // try several different locations, all included in Go's zoneinfo.zip for _, locName := range []string{ "UTC", "America/Chicago", "America/New_York", "Australia/Darwin", "Australia/Perth", } { loc, err := time.LoadLocation(locName) if err != nil { t.Logf("Could not load time zone %s - skipping", locName) continue } // Postgres timestamps have a resolution of 1 microsecond, so don't // use the full range of the Nanosecond argument refTime := time.Date(2012, 11, 6, 10, 23, 42, 123456000, loc) for _, pgTimeZone := range []string{"US/Eastern", "Australia/Darwin"} { // Switch Postgres's timezone to test different output timestamp formats _, err = tx.Exec(fmt.Sprintf("set time zone '%s'", pgTimeZone)) if err != nil { t.Fatal(err) } var gotTime time.Time row := tx.QueryRow("select $1::timestamp with time zone", refTime) err = row.Scan(&gotTime) if err != nil { t.Fatal(err) } if !refTime.Equal(gotTime) { t.Errorf("timestamps not equal: %s != %s", refTime, gotTime) } // check that the time zone is set correctly based on TimeZone pgLoc, err := time.LoadLocation(pgTimeZone) if err != nil { t.Logf("Could not load time zone %s - skipping", pgLoc) continue } translated := refTime.In(pgLoc) if translated.String() != gotTime.String() { t.Errorf("timestamps not equal: %s != %s", translated, gotTime) } } } } func TestTimestampWithOutTimezone(t *testing.T) { db := openTestConn(t) defer db.Close() test := func(ts, pgts string) { r, err := db.Query("SELECT $1::timestamp", pgts) if err != nil { t.Fatalf("Could not run query: %v", err) } if !r.Next() { t.Fatal("Expected at least one row") } var result time.Time err = r.Scan(&result) if err != nil { t.Fatalf("Did not expect error scanning row: %v", err) } expected, err := time.Parse(time.RFC3339, ts) if err != nil { t.Fatalf("Could not parse test time literal: %v", err) } if !result.Equal(expected) { t.Fatalf("Expected time to match %v: got mismatch %v", expected, result) } if r.Next() { t.Fatal("Expected only one row") } } test("2000-01-01T00:00:00Z", "2000-01-01T00:00:00") // Test higher precision time test("2013-01-04T20:14:58.80033Z", "2013-01-04 20:14:58.80033") } func TestInfinityTimestamp(t *testing.T) { db := openTestConn(t) defer db.Close() var err error var resultT time.Time expectedErrorStrPrefix := `sql: Scan error on column index 0: unsupported` type testCases []struct { Query string Param string ExpectedErrStrPrefix string ExpectedVal interface{} } tc := testCases{ {"SELECT $1::timestamp", "-infinity", expectedErrorStrPrefix, "-infinity"}, {"SELECT $1::timestamptz", "-infinity", expectedErrorStrPrefix, "-infinity"}, {"SELECT $1::timestamp", "infinity", expectedErrorStrPrefix, "infinity"}, {"SELECT $1::timestamptz", "infinity", expectedErrorStrPrefix, "infinity"}, } // try to assert []byte to time.Time for _, q := range tc { err = db.QueryRow(q.Query, q.Param).Scan(&resultT) if !strings.HasPrefix(err.Error(), q.ExpectedErrStrPrefix) { t.Errorf("Scanning -/+infinity, expected error to have prefix %q, got %q", q.ExpectedErrStrPrefix, err) } } // yield []byte for _, q := range tc { var resultI interface{} err = db.QueryRow(q.Query, q.Param).Scan(&resultI) if err != nil { t.Errorf("Scanning -/+infinity, expected no error, got %q", err) } result, ok := resultI.([]byte) if !ok { t.Errorf("Scanning -/+infinity, expected []byte, got %#v", resultI) } if string(result) != q.ExpectedVal { t.Errorf("Scanning -/+infinity, expected %q, got %q", q.ExpectedVal, result) } } y1500 := time.Date(1500, time.January, 1, 0, 0, 0, 0, time.UTC) y2500 := time.Date(2500, time.January, 1, 0, 0, 0, 0, time.UTC) EnableInfinityTs(y1500, y2500) err = db.QueryRow("SELECT $1::timestamp", "infinity").Scan(&resultT) if err != nil { t.Errorf("Scanning infinity, expected no error, got %q", err) } if !resultT.Equal(y2500) { t.Errorf("Scanning infinity, expected %q, got %q", y2500, resultT) } err = db.QueryRow("SELECT $1::timestamptz", "infinity").Scan(&resultT) if err != nil { t.Errorf("Scanning infinity, expected no error, got %q", err) } if !resultT.Equal(y2500) { t.Errorf("Scanning Infinity, expected time %q, got %q", y2500, resultT.String()) } err = db.QueryRow("SELECT $1::timestamp", "-infinity").Scan(&resultT) if err != nil { t.Errorf("Scanning -infinity, expected no error, got %q", err) } if !resultT.Equal(y1500) { t.Errorf("Scanning -infinity, expected time %q, got %q", y1500, resultT.String()) } err = db.QueryRow("SELECT $1::timestamptz", "-infinity").Scan(&resultT) if err != nil { t.Errorf("Scanning -infinity, expected no error, got %q", err) } if !resultT.Equal(y1500) { t.Errorf("Scanning -infinity, expected time %q, got %q", y1500, resultT.String()) } ym1500 := time.Date(-1500, time.January, 1, 0, 0, 0, 0, time.UTC) y11500 := time.Date(11500, time.January, 1, 0, 0, 0, 0, time.UTC) var s string err = db.QueryRow("SELECT $1::timestamp::text", ym1500).Scan(&s) if err != nil { t.Errorf("Encoding -infinity, expected no error, got %q", err) } if s != "-infinity" { t.Errorf("Encoding -infinity, expected %q, got %q", "-infinity", s) } err = db.QueryRow("SELECT $1::timestamptz::text", ym1500).Scan(&s) if err != nil { t.Errorf("Encoding -infinity, expected no error, got %q", err) } if s != "-infinity" { t.Errorf("Encoding -infinity, expected %q, got %q", "-infinity", s) } err = db.QueryRow("SELECT $1::timestamp::text", y11500).Scan(&s) if err != nil { t.Errorf("Encoding infinity, expected no error, got %q", err) } if s != "infinity" { t.Errorf("Encoding infinity, expected %q, got %q", "infinity", s) } err = db.QueryRow("SELECT $1::timestamptz::text", y11500).Scan(&s) if err != nil { t.Errorf("Encoding infinity, expected no error, got %q", err) } if s != "infinity" { t.Errorf("Encoding infinity, expected %q, got %q", "infinity", s) } disableInfinityTs() var panicErrorString string func() { defer func() { panicErrorString, _ = recover().(string) }() EnableInfinityTs(y2500, y1500) }() if panicErrorString != infinityTsNegativeMustBeSmaller { t.Errorf("Expected error, %q, got %q", infinityTsNegativeMustBeSmaller, panicErrorString) } } func TestStringWithNul(t *testing.T) { db := openTestConn(t) defer db.Close() hello0world := string("hello\x00world") _, err := db.Query("SELECT $1::text", &hello0world) if err == nil { t.Fatal("Postgres accepts a string with nul in it; " + "injection attacks may be plausible") } } func TestByteSliceToText(t *testing.T) { db := openTestConn(t) defer db.Close() b := []byte("hello world") row := db.QueryRow("SELECT $1::text", b) var result []byte err := row.Scan(&result) if err != nil { t.Fatal(err) } if string(result) != string(b) { t.Fatalf("expected %v but got %v", b, result) } } func TestStringToBytea(t *testing.T) { db := openTestConn(t) defer db.Close() b := "hello world" row := db.QueryRow("SELECT $1::bytea", b) var result []byte err := row.Scan(&result) if err != nil { t.Fatal(err) } if !bytes.Equal(result, []byte(b)) { t.Fatalf("expected %v but got %v", b, result) } } func TestTextByteSliceToUUID(t *testing.T) { db := openTestConn(t) defer db.Close() b := []byte("a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11") row := db.QueryRow("SELECT $1::uuid", b) var result string err := row.Scan(&result) if forceBinaryParameters() { pqErr := err.(*Error) if pqErr == nil { t.Errorf("Expected to get error") } else if pqErr.Code != "22P03" { t.Fatalf("Expected to get invalid binary encoding error (22P03), got %s", pqErr.Code) } } else { if err != nil { t.Fatal(err) } if result != string(b) { t.Fatalf("expected %v but got %v", b, result) } } } func TestBinaryByteSlicetoUUID(t *testing.T) { db := openTestConn(t) defer db.Close() b := []byte{'\xa0', '\xee', '\xbc', '\x99', '\x9c', '\x0b', '\x4e', '\xf8', '\xbb', '\x00', '\x6b', '\xb9', '\xbd', '\x38', '\x0a', '\x11'} row := db.QueryRow("SELECT $1::uuid", b) var result string err := row.Scan(&result) if forceBinaryParameters() { if err != nil { t.Fatal(err) } if result != string("a0eebc99-9c0b-4ef8-bb00-6bb9bd380a11") { t.Fatalf("expected %v but got %v", b, result) } } else { pqErr := err.(*Error) if pqErr == nil { t.Errorf("Expected to get error") } else if pqErr.Code != "22021" { t.Fatalf("Expected to get invalid byte sequence for encoding error (22021), got %s", pqErr.Code) } } } func TestStringToUUID(t *testing.T) { db := openTestConn(t) defer db.Close() s := "a0eebc99-9c0b-4ef8-bb00-6bb9bd380a11" row := db.QueryRow("SELECT $1::uuid", s) var result string err := row.Scan(&result) if err != nil { t.Fatal(err) } if result != s { t.Fatalf("expected %v but got %v", s, result) } } func TestTextByteSliceToInt(t *testing.T) { db := openTestConn(t) defer db.Close() expected := 12345678 b := []byte(fmt.Sprintf("%d", expected)) row := db.QueryRow("SELECT $1::int", b) var result int err := row.Scan(&result) if forceBinaryParameters() { pqErr := err.(*Error) if pqErr == nil { t.Errorf("Expected to get error") } else if pqErr.Code != "22P03" { t.Fatalf("Expected to get invalid binary encoding error (22P03), got %s", pqErr.Code) } } else { if err != nil { t.Fatal(err) } if result != expected { t.Fatalf("expected %v but got %v", expected, result) } } } func TestBinaryByteSliceToInt(t *testing.T) { db := openTestConn(t) defer db.Close() expected := 12345678 b := []byte{'\x00', '\xbc', '\x61', '\x4e'} row := db.QueryRow("SELECT $1::int", b) var result int err := row.Scan(&result) if forceBinaryParameters() { if err != nil { t.Fatal(err) } if result != expected { t.Fatalf("expected %v but got %v", expected, result) } } else { pqErr := err.(*Error) if pqErr == nil { t.Errorf("Expected to get error") } else if pqErr.Code != "22021" { t.Fatalf("Expected to get invalid byte sequence for encoding error (22021), got %s", pqErr.Code) } } } func TestTextDecodeIntoString(t *testing.T) { input := []byte("hello world") want := string(input) for _, typ := range []oid.Oid{oid.T_char, oid.T_varchar, oid.T_text} { got := decode(¶meterStatus{}, input, typ, formatText) if got != want { t.Errorf("invalid string decoding output for %T(%+v), got %v but expected %v", typ, typ, got, want) } } } func TestByteaOutputFormatEncoding(t *testing.T) { input := []byte("\\x\x00\x01\x02\xFF\xFEabcdefg0123") want := []byte("\\x5c78000102fffe6162636465666730313233") got := encode(¶meterStatus{serverVersion: 90000}, input, oid.T_bytea) if !bytes.Equal(want, got) { t.Errorf("invalid hex bytea output, got %v but expected %v", got, want) } want = []byte("\\\\x\\000\\001\\002\\377\\376abcdefg0123") got = encode(¶meterStatus{serverVersion: 84000}, input, oid.T_bytea) if !bytes.Equal(want, got) { t.Errorf("invalid escape bytea output, got %v but expected %v", got, want) } } func TestByteaOutputFormats(t *testing.T) { db := openTestConn(t) defer db.Close() if getServerVersion(t, db) < 90000 { // skip return } testByteaOutputFormat := func(f string, usePrepared bool) { expectedData := []byte("\x5c\x78\x00\xff\x61\x62\x63\x01\x08") sqlQuery := "SELECT decode('5c7800ff6162630108', 'hex')" var data []byte // use a txn to avoid relying on getting the same connection txn, err := db.Begin() if err != nil { t.Fatal(err) } defer txn.Rollback() _, err = txn.Exec("SET LOCAL bytea_output TO " + f) if err != nil { t.Fatal(err) } var rows *sql.Rows var stmt *sql.Stmt if usePrepared { stmt, err = txn.Prepare(sqlQuery) if err != nil { t.Fatal(err) } rows, err = stmt.Query() } else { // use Query; QueryRow would hide the actual error rows, err = txn.Query(sqlQuery) } if err != nil { t.Fatal(err) } if !rows.Next() { if rows.Err() != nil { t.Fatal(rows.Err()) } t.Fatal("shouldn't happen") } err = rows.Scan(&data) if err != nil { t.Fatal(err) } err = rows.Close() if err != nil { t.Fatal(err) } if stmt != nil { err = stmt.Close() if err != nil { t.Fatal(err) } } if !bytes.Equal(data, expectedData) { t.Errorf("unexpected bytea value %v for format %s; expected %v", data, f, expectedData) } } testByteaOutputFormat("hex", false) testByteaOutputFormat("escape", false) testByteaOutputFormat("hex", true) testByteaOutputFormat("escape", true) } func TestAppendEncodedText(t *testing.T) { var buf []byte buf = appendEncodedText(¶meterStatus{serverVersion: 90000}, buf, int64(10)) buf = append(buf, '\t') buf = appendEncodedText(¶meterStatus{serverVersion: 90000}, buf, 42.0000000001) buf = append(buf, '\t') buf = appendEncodedText(¶meterStatus{serverVersion: 90000}, buf, "hello\tworld") buf = append(buf, '\t') buf = appendEncodedText(¶meterStatus{serverVersion: 90000}, buf, []byte{0, 128, 255}) if string(buf) != "10\t42.0000000001\thello\\tworld\t\\\\x0080ff" { t.Fatal(string(buf)) } } func TestAppendEscapedText(t *testing.T) { if esc := appendEscapedText(nil, "hallo\tescape"); string(esc) != "hallo\\tescape" { t.Fatal(string(esc)) } if esc := appendEscapedText(nil, "hallo\\tescape\n"); string(esc) != "hallo\\\\tescape\\n" { t.Fatal(string(esc)) } if esc := appendEscapedText(nil, "\n\r\t\f"); string(esc) != "\\n\\r\\t\f" { t.Fatal(string(esc)) } } func TestAppendEscapedTextExistingBuffer(t *testing.T) { buf := []byte("123\t") if esc := appendEscapedText(buf, "hallo\tescape"); string(esc) != "123\thallo\\tescape" { t.Fatal(string(esc)) } buf = []byte("123\t") if esc := appendEscapedText(buf, "hallo\\tescape\n"); string(esc) != "123\thallo\\\\tescape\\n" { t.Fatal(string(esc)) } buf = []byte("123\t") if esc := appendEscapedText(buf, "\n\r\t\f"); string(esc) != "123\t\\n\\r\\t\f" { t.Fatal(string(esc)) } } func BenchmarkAppendEscapedText(b *testing.B) { longString := "" for i := 0; i < 100; i++ { longString += "123456789\n" } for i := 0; i < b.N; i++ { appendEscapedText(nil, longString) } } func BenchmarkAppendEscapedTextNoEscape(b *testing.B) { longString := "" for i := 0; i < 100; i++ { longString += "1234567890" } for i := 0; i < b.N; i++ { appendEscapedText(nil, longString) } }