コード例 #1
0
def test_asm2wasm_binary():
    print('\n[ checking asm2wasm binary reading/writing... ]\n')

    asmjs = os.path.join(shared.options.binaryen_test, 'hello_world.asm.js')
    shared.delete_from_orbit('a.wasm')
    shared.delete_from_orbit('b.wast')
    support.run_command(shared.ASM2WASM + [asmjs, '-o', 'a.wasm'])
    assert open('a.wasm', 'rb').read()[0] == 0, 'we emit binary by default'
    support.run_command(shared.ASM2WASM + [asmjs, '-o', 'b.wast', '-S'])
    assert open('b.wast', 'rb').read()[0] != 0, 'we emit text with -S'
コード例 #2
0
ファイル: check.py プロジェクト: kustomzone/binaryen
def run_wasm_opt_tests():
    print '\n[ checking wasm-opt -o notation... ]\n'

    for extra_args in [[], ['--no-validation']]:
        wast = os.path.join(options.binaryen_test, 'hello_world.wast')
        delete_from_orbit('a.wast')
        cmd = WASM_OPT + [wast, '-o', 'a.wast', '-S'] + extra_args
        run_command(cmd)
        fail_if_not_identical_to_file(open('a.wast').read(), wast)

    print '\n[ checking wasm-opt binary reading/writing... ]\n'

    shutil.copyfile(os.path.join(options.binaryen_test, 'hello_world.wast'),
                    'a.wast')
    delete_from_orbit('a.wasm')
    delete_from_orbit('b.wast')
    run_command(WASM_OPT + ['a.wast', '-o', 'a.wasm'])
    assert open('a.wasm', 'rb').read()[0] == '\0', 'we emit binary by default'
    run_command(WASM_OPT + ['a.wasm', '-o', 'b.wast', '-S'])
    assert open('b.wast', 'rb').read()[0] != '\0', 'we emit text with -S'

    print '\n[ checking wasm-opt passes... ]\n'

    for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'passes'))):
        if t.endswith(('.wast', '.wasm')):
            print '..', t
            binary = '.wasm' in t
            base = os.path.basename(t).replace('.wast',
                                               '').replace('.wasm', '')
            passname = base
            if passname.isdigit():
                passname = open(
                    os.path.join(options.binaryen_test, 'passes',
                                 passname + '.passes')).read().strip()
            opts = [('--' + p if not p.startswith('O') else '-' + p)
                    for p in passname.split('_')]
            t = os.path.join(options.binaryen_test, 'passes', t)
            actual = ''
            for module, asserts in split_wast(t):
                assert len(asserts) == 0
                with open('split.wast', 'w') as o:
                    o.write(module)
                cmd = WASM_OPT + opts + ['split.wast', '--print']
                curr = run_command(cmd)
                actual += curr
                # also check debug mode output is valid
                debugged = run_command(cmd + ['--debug'],
                                       stderr=subprocess.PIPE)
                fail_if_not_contained(actual, debugged)

                # also check pass-debug mode
                def check():
                    pass_debug = run_command(cmd)
                    fail_if_not_identical(curr, pass_debug)

                with_pass_debug(check)

            expected_file = os.path.join(
                options.binaryen_test, 'passes',
                base + ('.bin' if binary else '') + '.txt')
            fail_if_not_identical_to_file(actual, expected_file)

            if 'emit-js-wrapper' in t:
                with open('a.js') as actual:
                    fail_if_not_identical_to_file(actual.read(), t + '.js')
            if 'emit-spec-wrapper' in t:
                with open('a.wat') as actual:
                    fail_if_not_identical_to_file(actual.read(), t + '.wat')

    print '\n[ checking wasm-opt parsing & printing... ]\n'

    for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'print'))):
        if t.endswith('.wast'):
            print '..', t
            wasm = os.path.basename(t).replace('.wast', '')
            cmd = WASM_OPT + [
                os.path.join(options.binaryen_test, 'print', t), '--print'
            ]
            print '    ', ' '.join(cmd)
            actual, err = subprocess.Popen(
                cmd, stdout=subprocess.PIPE,
                stderr=subprocess.PIPE).communicate()
            expected_file = os.path.join(options.binaryen_test, 'print',
                                         wasm + '.txt')
            fail_if_not_identical_to_file(actual, expected_file)
            cmd = WASM_OPT + [
                os.path.join(options.binaryen_test, 'print', t),
                '--print-minified'
            ]
            print '    ', ' '.join(cmd)
            actual, err = subprocess.Popen(
                cmd, stdout=subprocess.PIPE,
                stderr=subprocess.PIPE).communicate()
            fail_if_not_identical(
                actual.strip(),
                open(
                    os.path.join(options.binaryen_test, 'print',
                                 wasm + '.minified.txt')).read().strip())

    print '\n[ checking wasm-opt testcases... ]\n'

    for t in tests:
        if t.endswith('.wast') and not t.startswith('spec'):
            print '..', t
            t = os.path.join(options.binaryen_test, t)
            f = t + '.from-wast'
            cmd = WASM_OPT + [t, '--print']
            actual = run_command(cmd)
            actual = actual.replace('printing before:\n', '')

            fail_if_not_identical_to_file(actual, f)

            binary_format_check(t, wasm_as_args=['-g'])  # test with debuginfo
            binary_format_check(t,
                                wasm_as_args=[],
                                binary_suffix='.fromBinary.noDebugInfo'
                                )  # test without debuginfo

            minify_check(t)
コード例 #3
0
ファイル: check.py プロジェクト: kustomzone/binaryen
def run_emscripten_tests():
    print '\n[ checking wasm.js methods... ]\n'

    for method_init in [
            'interpret-asm2wasm', 'interpret-s-expr', 'asmjs',
            'interpret-binary', 'asmjs,interpret-binary',
            'interpret-binary,asmjs'
    ]:
        # check success and failure for simple modes, only success for combined/fallback ones
        for success in [1, 0] if ',' not in method_init else [1]:
            method = method_init
            command = [
                EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1',
                os.path.join(options.binaryen_test, 'hello_world.c')
            ]
            command += ['-s', 'BINARYEN_METHOD="' + method + '"']
            print method, ' : ', ' '.join(command), ' => ', success
            subprocess.check_call(command)

            see_polyfill = 'var WasmJS = ' in open('a.wasm.js').read()

            if method and 'interpret' not in method:
                assert not see_polyfill, 'verify polyfill was not added - we specified a method, and it does not need it'
            else:
                assert see_polyfill, 'we need the polyfill'

            def break_cashew():
                asm = open('a.wasm.asm.js').read()
                asm = asm.replace(
                    '"almost asm"',
                    '"use asm"; var not_in_asm = [].length + (true || { x: 5 }.x);'
                )
                asm = asm.replace(
                    "'almost asm'",
                    '"use asm"; var not_in_asm = [].length + (true || { x: 5 }.x);'
                )
                with open('a.wasm.asm.js', 'w') as o:
                    o.write(asm)

            if method.startswith('interpret-asm2wasm'):
                delete_from_orbit(
                    'a.wasm.wast')  # we should not need the .wast
                if not success:
                    break_cashew()  # we need cashew
            elif method.startswith('interpret-s-expr'):
                delete_from_orbit(
                    'a.wasm.asm.js')  # we should not need the .asm.js
                if not success:
                    delete_from_orbit('a.wasm.wast')
            elif method.startswith('asmjs'):
                delete_from_orbit(
                    'a.wasm.wast')  # we should not need the .wast
                break_cashew()  # we don't use cashew, so ok to break it
                if not success:
                    delete_from_orbit('a.wasm.js')
            elif method.startswith('interpret-binary'):
                delete_from_orbit(
                    'a.wasm.wast')  # we should not need the .wast
                delete_from_orbit(
                    'a.wasm.asm.js')  # we should not need the .asm.js
                if not success:
                    delete_from_orbit('a.wasm.wasm')
            else:
                1 / 0
            if NODEJS:
                proc = subprocess.Popen([NODEJS, 'a.wasm.js'],
                                        stdout=subprocess.PIPE,
                                        stderr=subprocess.PIPE)
                out, err = proc.communicate()
                if success:
                    assert proc.returncode == 0, err
                    assert 'hello, world!' in out, out
                else:
                    assert proc.returncode != 0, err
                    assert 'hello, world!' not in out, out
コード例 #4
0
ファイル: check.py プロジェクト: migamake/binaryen
def run_wasm_opt_tests():
    print('\n[ checking wasm-opt -o notation... ]\n')

    for extra_args in [[], ['--no-validation']]:
        wast = os.path.join(shared.options.binaryen_test, 'hello_world.wat')
        shared.delete_from_orbit('a.wat')
        out = 'a.wat'
        cmd = shared.WASM_OPT + [wast, '-o', out, '-S'] + extra_args
        support.run_command(cmd)
        shared.fail_if_not_identical_to_file(open(out).read(), wast)

    print('\n[ checking wasm-opt binary reading/writing... ]\n')

    shutil.copyfile(
        os.path.join(shared.options.binaryen_test, 'hello_world.wat'), 'a.wat')
    shared.delete_from_orbit('a.wasm')
    shared.delete_from_orbit('b.wast')
    support.run_command(shared.WASM_OPT + ['a.wat', '-o', 'a.wasm'])
    assert open('a.wasm', 'rb').read()[0] == 0, 'we emit binary by default'
    support.run_command(shared.WASM_OPT + ['a.wasm', '-o', 'b.wast', '-S'])
    assert open('b.wast', 'rb').read()[0] != 0, 'we emit text with -S'

    print('\n[ checking wasm-opt passes... ]\n')

    for t in shared.get_tests(shared.get_test_dir('passes'),
                              ['.wast', '.wasm']):
        print('..', os.path.basename(t))
        binary = '.wasm' in t
        base = os.path.basename(t).replace('.wast', '').replace('.wasm', '')
        passname = base
        passes_file = os.path.join(shared.get_test_dir('passes'),
                                   passname + '.passes')
        if os.path.exists(passes_file):
            passname = open(passes_file).read().strip()
        opts = [('--' + p if not p.startswith('O') and p != 'g' else '-' + p)
                for p in passname.split('_')]
        actual = ''
        for module, asserts in support.split_wast(t):
            assert len(asserts) == 0
            support.write_wast('split.wast', module)
            cmd = shared.WASM_OPT + opts + ['split.wast', '--print']
            curr = support.run_command(cmd)
            actual += curr
            # also check debug mode output is valid
            debugged = support.run_command(cmd + ['--debug'],
                                           stderr=subprocess.PIPE)
            shared.fail_if_not_contained(actual, debugged)

            # also check pass-debug mode
            def check():
                pass_debug = support.run_command(cmd)
                shared.fail_if_not_identical(curr, pass_debug)

            shared.with_pass_debug(check)

        expected_file = os.path.join(
            shared.get_test_dir('passes'),
            base + ('.bin' if binary else '') + '.txt')
        shared.fail_if_not_identical_to_file(actual, expected_file)

        if 'emit-js-wrapper' in t:
            with open('a.js') as actual:
                shared.fail_if_not_identical_to_file(actual.read(), t + '.js')
        if 'emit-spec-wrapper' in t:
            with open('a.wat') as actual:
                shared.fail_if_not_identical_to_file(actual.read(), t + '.wat')

    print('\n[ checking wasm-opt parsing & printing... ]\n')

    for t in shared.get_tests(shared.get_test_dir('print'), ['.wast']):
        print('..', os.path.basename(t))
        wasm = os.path.basename(t).replace('.wast', '')
        cmd = shared.WASM_OPT + [t, '--print', '-all']
        print('    ', ' '.join(cmd))
        actual, err = subprocess.Popen(cmd,
                                       stdout=subprocess.PIPE,
                                       stderr=subprocess.PIPE,
                                       universal_newlines=True).communicate()
        expected_file = os.path.join(shared.get_test_dir('print'),
                                     wasm + '.txt')
        shared.fail_if_not_identical_to_file(actual, expected_file)
        cmd = shared.WASM_OPT + [
            os.path.join(shared.get_test_dir('print'), t), '--print-minified',
            '-all'
        ]
        print('    ', ' '.join(cmd))
        actual, err = subprocess.Popen(cmd,
                                       stdout=subprocess.PIPE,
                                       stderr=subprocess.PIPE,
                                       universal_newlines=True).communicate()
        shared.fail_if_not_identical(
            actual.strip(),
            open(
                os.path.join(shared.get_test_dir('print'),
                             wasm + '.minified.txt')).read().strip())

    print('\n[ checking wasm-opt testcases... ]\n')

    for t in shared.get_tests(shared.options.binaryen_test, ['.wast']):
        print('..', os.path.basename(t))
        f = t + '.from-wast'
        cmd = shared.WASM_OPT + [t, '--print', '-all']
        actual = support.run_command(cmd)
        actual = actual.replace('printing before:\n', '')

        shared.fail_if_not_identical_to_file(actual, f)

        # FIXME Remove this condition after nullref is implemented in V8
        if 'reference-types.wast' not in t:
            shared.binary_format_check(t,
                                       wasm_as_args=['-g'
                                                     ])  # test with debuginfo
            shared.binary_format_check(t,
                                       wasm_as_args=[],
                                       binary_suffix='.fromBinary.noDebugInfo'
                                       )  # test without debuginfo

        shared.minify_check(t)

    print('\n[ checking wasm-opt debugInfo read-write... ]\n')

    for t in shared.get_tests(shared.options.binaryen_test, ['.fromasm']):
        if 'debugInfo' not in t:
            continue
        print('..', os.path.basename(t))
        f = t + '.read-written'
        support.run_command(shared.WASM_AS +
                            [t, '--source-map=a.map', '-o', 'a.wasm', '-g'])
        support.run_command(shared.WASM_OPT + [
            'a.wasm', '--input-source-map=a.map', '-o', 'b.wasm',
            '--output-source-map=b.map', '-g'
        ])
        actual = support.run_command(shared.WASM_DIS +
                                     ['b.wasm', '--source-map=b.map'])
        shared.fail_if_not_identical_to_file(actual, f)
コード例 #5
0
ファイル: check.py プロジェクト: liuhaibinGit/C-Compiler
for e in executables:
    print '.. %s --help' % e
    out, err = subprocess.Popen(
        [os.path.join(options.binaryen_bin, e), '--help'],
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE).communicate()
    assert len(out) == 0, 'Expected no stdout, got:\n%s' % out
    assert e.replace(
        '.exe',
        '') in err, 'Expected help to contain program name, got:\n%s' % err
    assert len(err.split('\n')) > 8, 'Expected some help, got:\n%s' % err

print '\n[ checking wasm-opt -o notation... ]\n'

wast = os.path.join(options.binaryen_test, 'hello_world.wast')
delete_from_orbit('a.wast')
cmd = WASM_OPT + [wast, '-o', 'a.wast', '-S']
run_command(cmd)
fail_if_not_identical(open('a.wast').read(), open(wast).read())

print '\n[ checking wasm-opt binary reading/writing... ]\n'

shutil.copyfile(os.path.join(options.binaryen_test, 'hello_world.wast'),
                'a.wast')
delete_from_orbit('a.wasm')
delete_from_orbit('b.wast')
run_command(WASM_OPT + ['a.wast', '-o', 'a.wasm'])
assert open('a.wasm', 'rb').read()[0] == '\0', 'we emit binary by default'
run_command(WASM_OPT + ['a.wasm', '-o', 'b.wast', '-S'])
assert open('b.wast', 'rb').read()[0] != '\0', 'we emit text with -S'
コード例 #6
0
ファイル: check.py プロジェクト: nn1k4/binaryen
def run_emscripten_tests():
    if MOZJS and 0:

        print '\n[ checking native wasm support ]\n'

        command = [
            EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1',
            os.path.join(options.binaryen_test, 'hello_world.c'), '-s',
            'BINARYEN_METHOD="native-wasm"', '-s',
            'BINARYEN_SCRIPTS="spidermonkify.py"'
        ]
        print ' '.join(command)
        subprocess.check_call(command)

        cmd = [MOZJS, 'a.wasm.js']
        out = run_command(cmd)
        assert 'hello, world!' in out, out

        proc = subprocess.Popen([NODEJS, 'a.wasm.js'],
                                stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE)
        out, err = proc.communicate()
        assert proc.returncode != 0, 'should fail on no wasm support'
        assert 'no native wasm support detected' in err, err

    print '\n[ checking wasm.js methods... ]\n'

    for method_init in [
            'interpret-asm2wasm', 'interpret-s-expr', 'asmjs',
            'interpret-binary', 'asmjs,interpret-binary',
            'interpret-binary,asmjs'
    ]:
        # check success and failure for simple modes, only success for combined/fallback ones
        for success in [1, 0] if ',' not in method_init else [1]:
            method = method_init
            command = [
                EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1',
                os.path.join(options.binaryen_test, 'hello_world.c')
            ]
            command += ['-s', 'BINARYEN_METHOD="' + method + '"']
            print method, ' : ', ' '.join(command), ' => ', success
            subprocess.check_call(command)

            see_polyfill = 'var WasmJS = ' in open('a.wasm.js').read()

            if method and 'interpret' not in method:
                assert not see_polyfill, 'verify polyfill was not added - we specified a method, and it does not need it'
            else:
                assert see_polyfill, 'we need the polyfill'

            def break_cashew():
                asm = open('a.wasm.asm.js').read()
                asm = asm.replace(
                    '"almost asm"',
                    '"use asm"; var not_in_asm = [].length + (true || { x: 5 }.x);'
                )
                asm = asm.replace(
                    "'almost asm'",
                    '"use asm"; var not_in_asm = [].length + (true || { x: 5 }.x);'
                )
                with open('a.wasm.asm.js', 'w') as o:
                    o.write(asm)

            if method.startswith('interpret-asm2wasm'):
                delete_from_orbit(
                    'a.wasm.wast')  # we should not need the .wast
                if not success:
                    break_cashew()  # we need cashew
            elif method.startswith('interpret-s-expr'):
                delete_from_orbit(
                    'a.wasm.asm.js')  # we should not need the .asm.js
                if not success:
                    delete_from_orbit('a.wasm.wast')
            elif method.startswith('asmjs'):
                delete_from_orbit(
                    'a.wasm.wast')  # we should not need the .wast
                break_cashew()  # we don't use cashew, so ok to break it
                if not success:
                    delete_from_orbit('a.wasm.js')
            elif method.startswith('interpret-binary'):
                delete_from_orbit(
                    'a.wasm.wast')  # we should not need the .wast
                delete_from_orbit(
                    'a.wasm.asm.js')  # we should not need the .asm.js
                if not success:
                    delete_from_orbit('a.wasm.wasm')
            else:
                1 / 0
            if NODEJS:
                proc = subprocess.Popen([NODEJS, 'a.wasm.js'],
                                        stdout=subprocess.PIPE,
                                        stderr=subprocess.PIPE)
                out, err = proc.communicate()
                if success:
                    assert proc.returncode == 0, err
                    assert 'hello, world!' in out, out
                else:
                    assert proc.returncode != 0, err
                    assert 'hello, world!' not in out, out

    print '\n[ checking wasm.js testcases... ]\n'

    for c in tests:
        if c.endswith(('.c', '.cpp')):
            print '..', c
            base = c.replace('.cpp', '').replace('.c', '')
            post = base + '.post.js'
            try:
                post = open(os.path.join(options.binaryen_test, post)).read()
            except:
                post = None
            expected = open(os.path.join(options.binaryen_test,
                                         base + '.txt')).read()
            emcc = os.path.join(options.binaryen_test, base + '.emcc')
            extra = []
            if os.path.exists(emcc):
                extra = json.loads(open(emcc).read())
            if os.path.exists('a.normal.js'): os.unlink('a.normal.js')
            for opts in [[], ['-O1'], ['-O2'], ['-O3'], ['-Oz']]:
                for method in [
                        'interpret-asm2wasm', 'interpret-s-expr',
                        'interpret-binary'
                ]:
                    command = [
                        EMCC, '-o', 'a.wasm.js', '-s', 'BINARYEN=1',
                        os.path.join(options.binaryen_test, c)
                    ] + opts + extra
                    command += ['-s', 'BINARYEN_METHOD="' + method + '"']
                    command += ['-s', 'BINARYEN_TRAP_MODE="js"']
                    print '....' + ' '.join(command)
                    subprocess.check_call(command,
                                          stdout=subprocess.PIPE,
                                          stderr=subprocess.PIPE)
                    if post:
                        open('a.wasm.js', 'a').write(post)
                    else:
                        print '     (no post)'
                    for which in ['wasm']:
                        print '......', which
                        try:
                            args = json.loads(
                                open(
                                    os.path.join(options.binaryen_test,
                                                 base + '.args')).read())
                        except:
                            args = []
                            print '     (no args)'

                        def execute():
                            if NODEJS:
                                cmd = [NODEJS, 'a.' + which + '.js'] + args
                                out = run_command(cmd)
                                if out.strip() != expected.strip():
                                    fail(out, expected)

                        execute()

                        if method in ['interpret-s-expr']:
                            # binary and back
                            shutil.copyfile('a.wasm.wast',
                                            'a.wasm.original.wast')
                            recreated = binary_format_check(
                                'a.wasm.wast', verify_final_result=False)
                            shutil.copyfile(recreated, 'a.wasm.wast')
                            execute()
コード例 #7
0
                                [len(payload)]) + bytearray(payload)
                            print url_section_name
                            binary_contents = bytearray(binary.read())
                            if url_section_name not in binary_contents:
                                fail_with_error(
                                    'source map url section not found in binary'
                                )
                            if url_section_contents not in binary_contents[
                                    binary_contents.index(url_section_name):]:
                                fail_with_error(
                                    'source map url not found in url section')

    print '\n[ checking asm2wasm binary reading/writing... ]\n'

    asmjs = os.path.join(options.binaryen_test, 'hello_world.asm.js')
    delete_from_orbit('a.wasm')
    delete_from_orbit('b.wast')
    run_command(ASM2WASM + [asmjs, '-o', 'a.wasm'])
    assert open('a.wasm', 'rb').read()[0] == '\0', 'we emit binary by default'
    run_command(ASM2WASM + [asmjs, '-o', 'b.wast', '-S'])
    assert open('b.wast', 'rb').read()[0] != '\0', 'we emit text with -S'


def run_wasm_dis_tests():
    print '\n[ checking wasm-dis on provided binaries... ]\n'

    for t in tests:
        if t.endswith('.wasm') and not t.startswith('spec'):
            print '..', t
            t = os.path.join(options.binaryen_test, t)
            cmd = WASM_DIS + [t]
コード例 #8
0
ファイル: check.py プロジェクト: WebAssembly/binaryen
executables = sorted(filter(lambda x: not any(x.endswith(s) for s in
                                              not_executable_suffix) and os.path.isfile(x),
                            os.listdir(options.binaryen_bin)))
for e in executables:
  print '.. %s --help' % e
  out, err = subprocess.Popen([os.path.join(options.binaryen_bin, e), '--help'],
                              stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE).communicate()
  assert len(out) == 0, 'Expected no stdout, got:\n%s' % out
  assert e.replace('.exe', '') in err, 'Expected help to contain program name, got:\n%s' % err
  assert len(err.split('\n')) > 8, 'Expected some help, got:\n%s' % err

print '\n[ checking wasm-opt -o notation... ]\n'

wast = os.path.join(options.binaryen_test, 'hello_world.wast')
delete_from_orbit('a.wast')
cmd = WASM_OPT + [wast, '-o', 'a.wast']
run_command(cmd)
fail_if_not_identical(open('a.wast').read(), open(wast).read())

print '\n[ checking wasm-opt passes... ]\n'

for t in sorted(os.listdir(os.path.join(options.binaryen_test, 'passes'))):
  if t.endswith('.wast'):
    print '..', t
    passname = os.path.basename(t).replace('.wast', '')
    opts = ['-' + passname] if passname.startswith('O') else ['--' + p for p in passname.split('_')]
    t = os.path.join(options.binaryen_test, 'passes', t)
    actual = ''
    for module, asserts in split_wast(t):
      assert len(asserts) == 0
コード例 #9
0
ファイル: check.py プロジェクト: yurydelendik/binaryen
executables = sorted(filter(lambda x: not any(x.endswith(s) for s in
                                              not_executable_suffix) and os.path.isfile(x),
                            os.listdir(options.binaryen_bin)))
for e in executables:
  print '.. %s --help' % e
  out, err = subprocess.Popen([os.path.join(options.binaryen_bin, e), '--help'],
                              stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE).communicate()
  assert len(out) == 0, 'Expected no stdout, got:\n%s' % out
  assert e.replace('.exe', '') in err, 'Expected help to contain program name, got:\n%s' % err
  assert len(err.split('\n')) > 8, 'Expected some help, got:\n%s' % err

print '\n[ checking wasm-opt -o notation... ]\n'

wast = os.path.join(options.binaryen_test, 'hello_world.wast')
delete_from_orbit('a.wast')
cmd = WASM_OPT + [wast, '-o', 'a.wast', '-S']
run_command(cmd)
fail_if_not_identical(open('a.wast').read(), open(wast).read())

print '\n[ checking wasm-opt binary reading/writing... ]\n'

shutil.copyfile(os.path.join(options.binaryen_test, 'hello_world.wast'), 'a.wast')
delete_from_orbit('a.wasm')
delete_from_orbit('b.wast')
run_command(WASM_OPT + ['a.wast', '-o', 'a.wasm'])
assert open('a.wasm', 'rb').read()[0] == '\0', 'we emit binary by default'
run_command(WASM_OPT + ['a.wasm', '-o', 'b.wast', '-S'])
assert open('b.wast', 'rb').read()[0] != '\0', 'we emit text with -S'

print '\n[ checking wasm-opt passes... ]\n'