How to use readinto method in localstack

Best Python code snippet using localstack_python

test_file.py

Source:test_file.py

...34        self.f.write(b'12')35        self.f.close()36        a = array('b', b'x'*10)37        self.f = self.open(TESTFN, 'rb')38        n = self.f.readinto(a)39        self.assertEqual(b'12', a.tobytes()[:n])40    def testReadinto_text(self):41        # verify readinto refuses text files42        a = array('b', b'x'*10)43        self.f.close()44        self.f = self.open(TESTFN, 'r')45        if hasattr(self.f, "readinto"):46            self.assertRaises(TypeError, self.f.readinto, a)47    def testWritelinesUserList(self):48        # verify writelines with instance sequence49        l = UserList([b'1', b'2'])50        self.f.writelines(l)51        self.f.close()52        self.f = self.open(TESTFN, 'rb')53        buf = self.f.read()54        self.assertEqual(buf, b'12')55    def testWritelinesIntegers(self):56        # verify writelines with integers57        self.assertRaises(TypeError, self.f.writelines, [1, 2, 3])58    def testWritelinesIntegersUserList(self):59        # verify writelines with integers in UserList60        l = UserList([1,2,3])61        self.assertRaises(TypeError, self.f.writelines, l)62    def testWritelinesNonString(self):63        # verify writelines with non-string object64        class NonString:65            pass66        self.assertRaises(TypeError, self.f.writelines,67                          [NonString(), NonString()])68    def testErrors(self):69        f = self.f70        self.assertEqual(f.name, TESTFN)71        self.assertFalse(f.isatty())72        self.assertFalse(f.closed)73        if hasattr(f, "readinto"):74            self.assertRaises((OSError, TypeError), f.readinto, "")75        f.close()76        self.assertTrue(f.closed)77    def testMethods(self):78        methods = [('fileno', ()),79                   ('flush', ()),80                   ('isatty', ()),81                   ('__next__', ()),82                   ('read', ()),83                   ('write', (b"",)),84                   ('readline', ()),85                   ('readlines', ()),86                   ('seek', (0,)),87                   ('tell', ()),88                   ('write', (b"",)),89                   ('writelines', ([],)),90                   ('__iter__', ()),91                   ]92        methods.append(('truncate', ()))93        # __exit__ should close the file94        self.f.__exit__(None, None, None)95        self.assertTrue(self.f.closed)96        for methodname, args in methods:97            method = getattr(self.f, methodname)98            # should raise on closed file99            self.assertRaises(ValueError, method, *args)100        # file is closed, __exit__ shouldn't do anything101        self.assertEqual(self.f.__exit__(None, None, None), None)102        # it must also return None if an exception was given103        try:104            1/0105        except:106            self.assertEqual(self.f.__exit__(*sys.exc_info()), None)107    def testReadWhenWriting(self):108        self.assertRaises(OSError, self.f.read)109class CAutoFileTests(AutoFileTests, unittest.TestCase):110    open = io.open111class PyAutoFileTests(AutoFileTests, unittest.TestCase):112    open = staticmethod(pyio.open)113class OtherFileTests:114    def testModeStrings(self):115        # check invalid mode strings116        for mode in ("", "aU", "wU+", "U+", "+U", "rU+"):117            try:118                f = self.open(TESTFN, mode)119            except ValueError:120                pass121            else:122                f.close()123                self.fail('%r is an invalid file mode' % mode)124    def testBadModeArgument(self):125        # verify that we get a sensible error message for bad mode argument126        bad_mode = "qwerty"127        try:128            f = self.open(TESTFN, bad_mode)129        except ValueError as msg:130            if msg.args[0] != 0:131                s = str(msg)132                if TESTFN in s or bad_mode not in s:133                    self.fail("bad error message for invalid mode: %s" % s)134            # if msg.args[0] == 0, we're probably on Windows where there may be135            # no obvious way to discover why open() failed.136        else:137            f.close()138            self.fail("no error for invalid mode: %s" % bad_mode)139    def testSetBufferSize(self):140        # make sure that explicitly setting the buffer size doesn't cause141        # misbehaviour especially with repeated close() calls142        for s in (-1, 0, 1, 512):143            try:144                f = self.open(TESTFN, 'wb', s)145                f.write(str(s).encode("ascii"))146                f.close()147                f.close()148                f = self.open(TESTFN, 'rb', s)149                d = int(f.read().decode("ascii"))150                f.close()151                f.close()152            except OSError as msg:153                self.fail('error setting buffer size %d: %s' % (s, str(msg)))154            self.assertEqual(d, s)155    def testTruncateOnWindows(self):156        # SF bug <http://www.python.org/sf/801631>157        # "file.truncate fault on windows"158        os.unlink(TESTFN)159        f = self.open(TESTFN, 'wb')160        try:161            f.write(b'12345678901')   # 11 bytes162            f.close()163            f = self.open(TESTFN,'rb+')164            data = f.read(5)165            if data != b'12345':166                self.fail("Read on file opened for update failed %r" % data)167            if f.tell() != 5:168                self.fail("File pos after read wrong %d" % f.tell())169            f.truncate()170            if f.tell() != 5:171                self.fail("File pos after ftruncate wrong %d" % f.tell())172            f.close()173            size = os.path.getsize(TESTFN)174            if size != 5:175                self.fail("File size after ftruncate wrong %d" % size)176        finally:177            f.close()178            os.unlink(TESTFN)179    def testIteration(self):180        # Test the complex interaction when mixing file-iteration and the181        # various read* methods.182        dataoffset = 16384183        filler = b"ham\n"184        assert not dataoffset % len(filler), \185            "dataoffset must be multiple of len(filler)"186        nchunks = dataoffset // len(filler)187        testlines = [188            b"spam, spam and eggs\n",189            b"eggs, spam, ham and spam\n",190            b"saussages, spam, spam and eggs\n",191            b"spam, ham, spam and eggs\n",192            b"spam, spam, spam, spam, spam, ham, spam\n",193            b"wonderful spaaaaaam.\n"194        ]195        methods = [("readline", ()), ("read", ()), ("readlines", ()),196                   ("readinto", (array("b", b" "*100),))]197        try:198            # Prepare the testfile199            bag = self.open(TESTFN, "wb")200            bag.write(filler * nchunks)201            bag.writelines(testlines)202            bag.close()203            # Test for appropriate errors mixing read* and iteration204            for methodname, args in methods:205                f = self.open(TESTFN, 'rb')206                if next(f) != filler:207                    self.fail, "Broken testfile"208                meth = getattr(f, methodname)209                meth(*args)  # This simply shouldn't fail210                f.close()211            # Test to see if harmless (by accident) mixing of read* and212            # iteration still works. This depends on the size of the internal213            # iteration buffer (currently 8192,) but we can test it in a214            # flexible manner.  Each line in the bag o' ham is 4 bytes215            # ("h", "a", "m", "\n"), so 4096 lines of that should get us216            # exactly on the buffer boundary for any power-of-2 buffersize217            # between 4 and 16384 (inclusive).218            f = self.open(TESTFN, 'rb')219            for i in range(nchunks):220                next(f)221            testline = testlines.pop(0)222            try:223                line = f.readline()224            except ValueError:225                self.fail("readline() after next() with supposedly empty "226                          "iteration-buffer failed anyway")227            if line != testline:228                self.fail("readline() after next() with empty buffer "229                          "failed. Got %r, expected %r" % (line, testline))230            testline = testlines.pop(0)231            buf = array("b", b"\x00" * len(testline))232            try:233                f.readinto(buf)234            except ValueError:235                self.fail("readinto() after next() with supposedly empty "236                          "iteration-buffer failed anyway")237            line = buf.tobytes()238            if line != testline:239                self.fail("readinto() after next() with empty buffer "240                          "failed. Got %r, expected %r" % (line, testline))241            testline = testlines.pop(0)242            try:243                line = f.read(len(testline))244            except ValueError:245                self.fail("read() after next() with supposedly empty "246                          "iteration-buffer failed anyway")247            if line != testline:248                self.fail("read() after next() with empty buffer "249                          "failed. Got %r, expected %r" % (line, testline))250            try:251                lines = f.readlines()252            except ValueError:253                self.fail("readlines() after next() with supposedly empty "254                          "iteration-buffer failed anyway")255            if lines != testlines:256                self.fail("readlines() after next() with empty buffer "257                          "failed. Got %r, expected %r" % (line, testline))258            f.close()259            # Reading after iteration hit EOF shouldn't hurt either260            f = self.open(TESTFN, 'rb')261            try:262                for line in f:263                    pass264                try:265                    f.readline()266                    f.readinto(buf)267                    f.read()268                    f.readlines()269                except ValueError:270                    self.fail("read* failed after next() consumed file")271            finally:272                f.close()273        finally:274            os.unlink(TESTFN)275class COtherFileTests(OtherFileTests, unittest.TestCase):276    open = io.open277class PyOtherFileTests(OtherFileTests, unittest.TestCase):278    open = staticmethod(pyio.open)279def tearDownModule():280    # Historically, these tests have been sloppy about removing TESTFN....

signed-transaction.ts

Source:signed-transaction.ts

1import { Bool, BytesReader, Codec, CompactInt } from "as-scale-codec";2import { Extrinsic, ExtrinsicType } from "./extrinsic";3/**4 * @description Class representing an Extrinsic in the Substrate Runtime5 */6export class SignedTransaction<Address extends Codec, A extends Codec, N extends Codec, S extends Codec> 7    extends Extrinsic{8    9    /**10     * from address 11     */12    public from: Address13    14    /**15     * to address16     */17    public to: Address18    /**19     * amount of the transfer20     */21    public amount: A22    /**23     * nonce of the transaction24     */25    public nonce: N26    /**27     * the signature of the transaction (64 byte array)28     */29    public signature: S;30    /**31     * Determines whether to exhaust the gas. Default false32     */33    public exhaustResourcesWhenNotFirst: Bool34    constructor(35        from: Address = instantiate<Address>(), 36        to: Address = instantiate<Address>(), 37        amount: A = instantiate<A>(), 38        nonce: N = instantiate<N>(), 39        signature: S = instantiate<S>(), 40        exhaustResourcesWhenNotFirst: Bool = new Bool()) 41    {42        super(ExtrinsicType.SignedTransaction);43        this.from = from;44        this.to = to;45        this.amount = amount;46        this.nonce = nonce;47        this.signature = signature;48        this.exhaustResourcesWhenNotFirst = exhaustResourcesWhenNotFirst;49    }50    /**51    * @description SCALE Encodes the Header into u8[]52    */53    toU8a(): u8[] {54        let len = new CompactInt(ExtrinsicType.SignedTransaction);55        return len.toU8a()56            .concat(this.from.toU8a())57            .concat(this.to.toU8a())58            .concat(this.amount.toU8a())59            .concat(this.nonce.toU8a())60            .concat(this.signature.toU8a())61            .concat(this.exhaustResourcesWhenNotFirst.toU8a());62    }63    /**64     * @description Get type id of the Extrinsic65     */66    getTypeId(): i32{67        return <i32>this.typeId;68    }69    /**70     * @description get SCALE encoded bytes for the Transfer instance71     */72    getTransferBytes(): u8[]{73        return this.from.toU8a()74            .concat(this.to.toU8a())75            .concat(this.amount.toU8a())76            .concat(this.nonce.toU8a())77    }78    /**79     * @description Get amount of transaction80     */81    getAmount(): A{82        return this.amount;83    }84    /**85     * @description Get nonce of the transaction86     */87    getNonce(): N{88        return this.nonce;89    }90    /**91     * @description Get signature of the transaction92     */93    getSignature(): S{94        return this.signature;95    }96    /**97     * @description Get sender of the transaction98     */99    getFrom(): Address{100        return this.from;101    }102    /**103     * @description Get receiver of the transaction104     */105    getTo(): Address{106        return this.to;107    }108    /**109     * @description Converts to SCALE encoded bytes110     */111    encodedLength(): i32{112        return this.toU8a().length;113    }114    /**115     * @description Checks if this instance is equal to other instance116     * @param other 117     */118    eq(other: SignedTransaction<Address, A, N, S>): bool{119        return this.from == other.from 120            && this.to == other.to121            && this.amount == other.amount122            && this.signature == other.signature;123    }124    /**125     * @description Checks if this instance is not equal to other instance126     * @param other 127     */128    notEq(other: SignedTransaction<Address, A, N, S>): bool{129        return !this.eq(other);130    }131    /**132     * @description Non static constructor from bytes133     * @param bytes SCALE encoded bytes134     * @param index starting index135     */136    populateFromBytes(bytes: u8[], index: i32 = 0): void {137        assert(bytes.length - index > this.getTypeId(), "SignedTransaction: Bytes array with insufficient length");138        const bytesReader = new BytesReader(bytes.slice(index));139        let length = bytesReader.readInto<CompactInt>();140        assert(<i32>length.unwrap() == this.typeId, "SignedTransaction: Incorrectly encoded SignedTransaction");141        this.from = bytesReader.readInto<Address>();142        this.to = bytesReader.readInto<Address>();143        this.amount = bytesReader.readInto<A>();144        this.nonce = bytesReader.readInto<N>();145        this.signature = bytesReader.readInto<S>();146    }147    /**148     * @description Instanciates new Extrinsic object from SCALE encoded byte array149     * @param input - SCALE encoded Extrinsic150     */151    static fromU8Array<Address extends Codec, A extends Codec, N extends Codec, S extends Codec>(input: u8[], index: i32 = 0): Extrinsic {152        assert(input.length - index >= ExtrinsicType.SignedTransaction, "Extrinsic: Invalid bytes provided. EOF");153        const bytesReader = new BytesReader(input.slice(index));154        const from = bytesReader.readInto<Address>();155        const to = bytesReader.readInto<Address>();156        const amount = bytesReader.readInto<A>();157        const nonce = bytesReader.readInto<N>();158        const signature = bytesReader.readInto<S>();159        const exhaustResourcesWhenNotFirst = bytesReader.readInto<Bool>();160        return new SignedTransaction(from, to, amount, nonce, signature, exhaustResourcesWhenNotFirst);161    }...

spi.py

Source:spi.py

...32SPI(0, SPI.MASTER, polarity=0, phase=0, pins=('GP31', 'GP16', 'GP15'))33spi = SPI(0, SPI.MASTER, baudrate=10000000, polarity=0, phase=0, pins=spi_pins)34print(spi.write('123456') == 6)35buffer_r = bytearray(10)36print(spi.readinto(buffer_r) == 10)37print(spi.readinto(buffer_r, write=0x55) == 10)38read = spi.read(10)39print(len(read) == 10)40read = spi.read(10, write=0xFF)41print(len(read) == 10)42buffer_w = bytearray([1, 2, 3, 4, 5, 6, 7, 8, 9, 0])43print(spi.write_readinto(buffer_w, buffer_r) == 10)44print(buffer_w == buffer_r)45# test all polaritiy and phase combinations46spi.init(polarity=1, phase=0, pins=None)47buffer_r = bytearray(10)48spi.write_readinto(buffer_w, buffer_r)49print(buffer_w == buffer_r)50spi.init(polarity=1, phase=1, pins=None)51buffer_r = bytearray(10)52spi.write_readinto(buffer_w, buffer_r)53print(buffer_w == buffer_r)54spi.init(polarity=0, phase=1, pins=None)55buffer_r = bytearray(10)56spi.write_readinto(buffer_w, buffer_r)57print(buffer_w == buffer_r)58# test 16 and 32 bit transfers59buffer_w = bytearray([1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2])60buffer_r = bytearray(12)61spi.init(SPI.MASTER, baudrate=10000000, bits=16, polarity=0, phase=0, pins=None)62print(spi.write_readinto(buffer_w, buffer_r) == 12)63print(buffer_w == buffer_r)64buffer_r = bytearray(12)65spi.init(SPI.MASTER, baudrate=10000000, bits=32, polarity=0, phase=0, pins=None)66print(spi.write_readinto(buffer_w, buffer_r) == 12)67print(buffer_w == buffer_r)68# check for memory leaks...69for i in range (0, 1000):70    spi = SPI(0, SPI.MASTER, baudrate=1000000)71# test deinit72spi = SPI(0, SPI.MASTER, baudrate=1000000)73spi.deinit()74print(spi)75spi = SPI(0, SPI.MASTER, baudrate=1000000)76# next ones must fail77try:78    spi = SPI(0, 10, baudrate=10000000, polarity=0, phase=0)79except:80    print("Exception")81try:82    spi = SPI(0, mode=SPI.MASTER, baudrate=10000000, polarity=1, phase=2)83except:84    print("Exception")85try:86    spi = SPI(1, mode=SPI.MASTER, baudrate=10000000, polarity=1, phase=1)87except:88    print("Exception")89try:90    spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=2, phase=0)91except:92    print("Exception")93try:94    spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=2, phase=0, firstbit=2)95except:96    print("Exception")97try:98    spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=2, phase=0, pins=('GP1', 'GP2'))99except:100    print("Exception")101try:102    spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=0, phase=0, bits=9)103except:104    print("Exception")105spi.deinit()106try:107    spi.read(15)108except Exception:109    print("Exception")110try:111    spi.spi.readinto(buffer_r)112except Exception:113    print("Exception")114try:115    spi.spi.write('abc')116except Exception:117    print("Exception")118try:119    spi.write_readinto(buffer_w, buffer_r)120except Exception:121    print("Exception")122# reinitialization must work123spi.init(baudrate=500000)...

transfer.ts

Source:transfer.ts

1import { BytesReader, Codec, CompactInt } from "as-scale-codec";2import { Utils } from "../../utils";3/**4 * @description Class representing a Transfer in the Substrate Runtime5 */6export class Transfer<Address extends Codec, A extends Codec, N extends Codec> 7    implements Codec {8    9    /**10     * from address 11     */12    public from: Address13    14    /**15     * to address16     */17    public to: Address18    /**19     * amount of the transfer20     */21    public amount: A22    /**23     * nonce of the transaction24     */25    public nonce: N26    constructor(27        from: Address = instantiate<Address>(), 28        to: Address = instantiate<Address>(), 29        amount: A = instantiate<A>(), 30        nonce: N = instantiate<N>()) 31    {32        this.from = from;33        this.to = to;34        this.amount = amount;35        this.nonce = nonce;36    }37    /**38    * @description SCALE Encodes the Header into u8[]39    */40    toU8a(): u8[] {41        const result: u8[] = this.from.toU8a()42            .concat(this.to.toU8a())43            .concat(this.amount.toU8a())44            .concat(this.nonce.toU8a());45        return Utils.encodeCompact(result);46    }47    /**48     * @description get SCALE encoded bytes for the Transfer instance49     */50    getTransferBytes(): u8[]{51        return this.from.toU8a()52            .concat(this.to.toU8a())53            .concat(this.amount.toU8a())54            .concat(this.nonce.toU8a())55    }56    /**57     * @description Get amount of transaction58     */59    getAmount(): A{60        return this.amount;61    }62    /**63     * @description Get nonce of the transaction64     */65    getNonce(): N{66        return this.nonce;67    }68    /**69     * @description Get sender of the transaction70     */71    getFrom(): Address{72        return this.from;73    }74    /**75     * @description Get receiver of the transaction76     */77    getTo(): Address{78        return this.to;79    }80    /**81     * @description Gets bytes length of the instance82     */83    encodedLength(): i32{84        return this.toU8a().length;85    }86    /**87     * @description Checks if this instance is equal to other instance88     * @param other 89     */90    eq(other: Transfer<Address, A, N>): bool{91        return this.from.eq(other.from) 92            && this.to.eq(other.to)93            && this.amount.eq(other.amount)94            && this.nonce.eq(other.nonce);95    }96    /**97     * @description Checks if this instance is not equal to other instance98     * @param other 99     */100    notEq(other: Transfer<Address, A, N>): bool{101        return !this.eq(other);102    }103    /**104     * @description Non static constructor from bytes105     * @param bytes SCALE encoded bytes106     * @param index starting index107     */108    populateFromBytes(bytes: u8[], index: i32 = 0): void {109        const bytesReader = new BytesReader(bytes.slice(index));110        let _length = bytesReader.readInto<CompactInt>();111        this.from = bytesReader.readInto<Address>();112        this.to = bytesReader.readInto<Address>();113        this.amount = bytesReader.readInto<A>();114        this.nonce = bytesReader.readInto<N>();115    }116    /**117     * @description Instanciates new Transfer object from SCALE encoded byte array118     * @param input - SCALE encoded Transfer119     */120    static fromU8Array<Address extends Codec, A extends Codec, N extends Codec>(input: u8[], index: i32 = 0): Transfer<Address, A, N> {121        const bytesReader = new BytesReader(input.slice(index));122        let _length = bytesReader.readInto<CompactInt>();123        const from = bytesReader.readInto<Address>();124        const to = bytesReader.readInto<Address>();125        const amount = bytesReader.readInto<A>();126        const nonce = bytesReader.readInto<N>();127        return new Transfer(from, to, amount, nonce);128    }...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.