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How to use make_test_case method in gabbi

Best Python code snippet using gabbi_python
create_test_cases.py
Source:create_test_cases.py
...26import subprocess27import sys28sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..')) # For access to sexps.py, which is in parent dir29from sexps import *30def make_test_case(f_name, ret_type, body):31    """Create a simple optimization test case consisting of a single32    function with the given name, return type, and body.33    Global declarations are automatically created for any undeclared34    variables that are referenced by the function.  All undeclared35    variables are assumed to be floats.36    """37    check_sexp(body)38    declarations = {}39    def make_declarations(sexp, already_declared = ()):40        if isinstance(sexp, list):41            if len(sexp) == 2 and sexp[0] == 'var_ref':42                if sexp[1] not in already_declared:43                    declarations[sexp[1]] = [44                        'declare', ['in'], 'float', sexp[1]]45            elif len(sexp) == 4 and sexp[0] == 'assign':46                assert sexp[2][0] == 'var_ref'47                if sexp[2][1] not in already_declared:48                    declarations[sexp[2][1]] = [49                        'declare', ['out'], 'float', sexp[2][1]]50                make_declarations(sexp[3], already_declared)51            else:52                already_declared = set(already_declared)53                for s in sexp:54                    if isinstance(s, list) and len(s) >= 4 and \55                            s[0] == 'declare':56                        already_declared.add(s[3])57                    else:58                        make_declarations(s, already_declared)59    make_declarations(body)60    return declarations.values() + \61        [['function', f_name, ['signature', ret_type, ['parameters'], body]]]62# The following functions can be used to build expressions.63def const_float(value):64    """Create an expression representing the given floating point value."""65    return ['constant', 'float', ['{0:.6f}'.format(value)]]66def const_bool(value):67    """Create an expression representing the given boolean value.68    If value is not a boolean, it is converted to a boolean.  So, for69    instance, const_bool(1) is equivalent to const_bool(True).70    """71    return ['constant', 'bool', ['{0}'.format(1 if value else 0)]]72def gt_zero(var_name):73    """Create Construct the expression var_name > 0"""74    return ['expression', 'bool', '>', ['var_ref', var_name], const_float(0)]75# The following functions can be used to build complex control flow76# statements.  All of these functions return statement lists (even77# those which only create a single statement), so that statements can78# be sequenced together using the '+' operator.79def return_(value = None):80    """Create a return statement."""81    if value is not None:82        return [['return', value]]83    else:84        return [['return']]85def break_():86    """Create a break statement."""87    return ['break']88def continue_():89    """Create a continue statement."""90    return ['continue']91def simple_if(var_name, then_statements, else_statements = None):92    """Create a statement of the form93    if (var_name > 0.0) {94       <then_statements>95    } else {96       <else_statements>97    }98    else_statements may be omitted.99    """100    if else_statements is None:101        else_statements = []102    check_sexp(then_statements)103    check_sexp(else_statements)104    return [['if', gt_zero(var_name), then_statements, else_statements]]105def loop(statements):106    """Create a loop containing the given statements as its loop107    body.108    """109    check_sexp(statements)110    return [['loop', [], [], [], [], statements]]111def declare_temp(var_type, var_name):112    """Create a declaration of the form113    (declare (temporary) <var_type> <var_name)114    """115    return [['declare', ['temporary'], var_type, var_name]]116def assign_x(var_name, value):117    """Create a statement that assigns <value> to the variable118    <var_name>.  The assignment uses the mask (x).119    """120    check_sexp(value)121    return [['assign', ['x'], ['var_ref', var_name], value]]122def complex_if(var_prefix, statements):123    """Create a statement of the form124    if (<var_prefix>a > 0.0) {125       if (<var_prefix>b > 0.0) {126          <statements>127       }128    }129    This is useful in testing jump lowering, because if <statements>130    ends in a jump, lower_jumps.cpp won't try to combine this131    construct with the code that follows it, as it might do for a132    simple if.133    All variables used in the if statement are prefixed with134    var_prefix.  This can be used to ensure uniqueness.135    """136    check_sexp(statements)137    return simple_if(var_prefix + 'a', simple_if(var_prefix + 'b', statements))138def declare_execute_flag():139    """Create the statements that lower_jumps.cpp uses to declare and140    initialize the temporary boolean execute_flag.141    """142    return declare_temp('bool', 'execute_flag') + \143        assign_x('execute_flag', const_bool(True))144def declare_return_flag():145    """Create the statements that lower_jumps.cpp uses to declare and146    initialize the temporary boolean return_flag.147    """148    return declare_temp('bool', 'return_flag') + \149        assign_x('return_flag', const_bool(False))150def declare_return_value():151    """Create the statements that lower_jumps.cpp uses to declare and152    initialize the temporary variable return_value.  Assume that153    return_value is a float.154    """155    return declare_temp('float', 'return_value')156def declare_break_flag():157    """Create the statements that lower_jumps.cpp uses to declare and158    initialize the temporary boolean break_flag.159    """160    return declare_temp('bool', 'break_flag') + \161        assign_x('break_flag', const_bool(False))162def lowered_return_simple(value = None):163    """Create the statements that lower_jumps.cpp lowers a return164    statement to, in situations where it does not need to clear the165    execute flag.166    """167    if value:168        result = assign_x('return_value', value)169    else:170        result = []171    return result + assign_x('return_flag', const_bool(True))172def lowered_return(value = None):173    """Create the statements that lower_jumps.cpp lowers a return174    statement to, in situations where it needs to clear the execute175    flag.176    """177    return lowered_return_simple(value) + \178        assign_x('execute_flag', const_bool(False))179def lowered_continue():180    """Create the statement that lower_jumps.cpp lowers a continue181    statement to.182    """183    return assign_x('execute_flag', const_bool(False))184def lowered_break_simple():185    """Create the statement that lower_jumps.cpp lowers a break186    statement to, in situations where it does not need to clear the187    execute flag.188    """189    return assign_x('break_flag', const_bool(True))190def lowered_break():191    """Create the statement that lower_jumps.cpp lowers a break192    statement to, in situations where it needs to clear the execute193    flag.194    """195    return lowered_break_simple() + assign_x('execute_flag', const_bool(False))196def if_execute_flag(statements):197    """Wrap statements in an if test so that they will only execute if198    execute_flag is True.199    """200    check_sexp(statements)201    return [['if', ['var_ref', 'execute_flag'], statements, []]]202def if_not_return_flag(statements):203    """Wrap statements in an if test so that they will only execute if204    return_flag is False.205    """206    check_sexp(statements)207    return [['if', ['var_ref', 'return_flag'], [], statements]]208def final_return():209    """Create the return statement that lower_jumps.cpp places at the210    end of a function when lowering returns.211    """212    return [['return', ['var_ref', 'return_value']]]213def final_break():214    """Create the conditional break statement that lower_jumps.cpp215    places at the end of a function when lowering breaks.216    """217    return [['if', ['var_ref', 'break_flag'], break_(), []]]218def bash_quote(*args):219    """Quote the arguments appropriately so that bash will understand220    each argument as a single word.221    """222    def quote_word(word):223        for c in word:224            if not (c.isalpha() or c.isdigit() or c in '@%_-+=:,./'):225                break226        else:227            if not word:228                return "''"229            return word230        return "'{0}'".format(word.replace("'", "'\"'\"'"))231    return ' '.join(quote_word(word) for word in args)232def create_test_case(doc_string, input_sexp, expected_sexp, test_name,233                     pull_out_jumps=False, lower_sub_return=False,234                     lower_main_return=False, lower_continue=False,235                     lower_break=False):236    """Create a test case that verifies that do_lower_jumps transforms237    the given code in the expected way.238    """239    doc_lines = [line.strip() for line in doc_string.splitlines()]240    doc_string = ''.join('# {0}\n'.format(line) for line in doc_lines if line != '')241    check_sexp(input_sexp)242    check_sexp(expected_sexp)243    input_str = sexp_to_string(sort_decls(input_sexp))244    expected_output = sexp_to_string(sort_decls(expected_sexp))245    optimization = (246        'do_lower_jumps({0:d}, {1:d}, {2:d}, {3:d}, {4:d})'.format(247            pull_out_jumps, lower_sub_return, lower_main_return,248            lower_continue, lower_break))249    args = ['../../glsl_test', 'optpass', '--quiet', '--input-ir', optimization]250    test_file = '{0}.opt_test'.format(test_name)251    with open(test_file, 'w') as f:252        f.write('#!/bin/bash\n#\n# This file was generated by create_test_cases.py.\n#\n')253        f.write(doc_string)254        f.write('{0} <<EOF\n'.format(bash_quote(*args)))255        f.write('{0}\nEOF\n'.format(input_str))256    os.chmod(test_file, 0774)257    expected_file = '{0}.opt_test.expected'.format(test_name)258    with open(expected_file, 'w') as f:259        f.write('{0}\n'.format(expected_output))260def test_lower_returns_main():261    doc_string = """Test that do_lower_jumps respects the lower_main_return262    flag in deciding whether to lower returns in the main263    function.264    """265    input_sexp = make_test_case('main', 'void', (266            complex_if('', return_())267            ))268    expected_sexp = make_test_case('main', 'void', (269            declare_execute_flag() +270            declare_return_flag() +271            complex_if('', lowered_return())272            ))273    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_returns_main_true',274                     lower_main_return=True)275    create_test_case(doc_string, input_sexp, input_sexp, 'lower_returns_main_false',276                     lower_main_return=False)277def test_lower_returns_sub():278    doc_string = """Test that do_lower_jumps respects the lower_sub_return flag279    in deciding whether to lower returns in subroutines.280    """281    input_sexp = make_test_case('sub', 'void', (282            complex_if('', return_())283            ))284    expected_sexp = make_test_case('sub', 'void', (285            declare_execute_flag() +286            declare_return_flag() +287            complex_if('', lowered_return())288            ))289    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_returns_sub_true',290                     lower_sub_return=True)291    create_test_case(doc_string, input_sexp, input_sexp, 'lower_returns_sub_false',292                     lower_sub_return=False)293def test_lower_returns_1():294    doc_string = """Test that a void return at the end of a function is295    eliminated.296    """297    input_sexp = make_test_case('main', 'void', (298            assign_x('a', const_float(1)) +299            return_()300            ))301    expected_sexp = make_test_case('main', 'void', (302            assign_x('a', const_float(1))303            ))304    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_returns_1',305                     lower_main_return=True)306def test_lower_returns_2():307    doc_string = """Test that lowering is not performed on a non-void return at308    the end of subroutine.309    """310    input_sexp = make_test_case('sub', 'float', (311            assign_x('a', const_float(1)) +312            return_(const_float(1))313            ))314    create_test_case(doc_string, input_sexp, input_sexp, 'lower_returns_2',315                     lower_sub_return=True)316def test_lower_returns_3():317    doc_string = """Test lowering of returns when there is one nested inside a318    complex structure of ifs, and one at the end of a function.319    In this case, the latter return needs to be lowered because it320    will not be at the end of the function once the final return321    is inserted.322    """323    input_sexp = make_test_case('sub', 'float', (324            complex_if('', return_(const_float(1))) +325            return_(const_float(2))326            ))327    expected_sexp = make_test_case('sub', 'float', (328            declare_execute_flag() +329            declare_return_value() +330            declare_return_flag() +331            complex_if('', lowered_return(const_float(1))) +332            if_execute_flag(lowered_return(const_float(2))) +333            final_return()334            ))335    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_returns_3',336                     lower_sub_return=True)337def test_lower_returns_4():338    doc_string = """Test that returns are properly lowered when they occur in339    both branches of an if-statement.340    """341    input_sexp = make_test_case('sub', 'float', (342            simple_if('a', return_(const_float(1)),343                      return_(const_float(2)))344            ))345    expected_sexp = make_test_case('sub', 'float', (346            declare_execute_flag() +347            declare_return_value() +348            declare_return_flag() +349            simple_if('a', lowered_return(const_float(1)),350                      lowered_return(const_float(2))) +351            final_return()352            ))353    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_returns_4',354                     lower_sub_return=True)355def test_lower_unified_returns():356    doc_string = """If both branches of an if statement end in a return, and357    pull_out_jumps is True, then those returns should be lifted358    outside the if and then properly lowered.359    Verify that this lowering occurs during the same pass as the360    lowering of other returns by checking that extra temporary361    variables aren't generated.362    """363    input_sexp = make_test_case('main', 'void', (364            complex_if('a', return_()) +365            simple_if('b', simple_if('c', return_(), return_()))366            ))367    expected_sexp = make_test_case('main', 'void', (368            declare_execute_flag() +369            declare_return_flag() +370            complex_if('a', lowered_return()) +371            if_execute_flag(simple_if('b', (simple_if('c', [], []) +372                                            lowered_return())))373            ))374    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_unified_returns',375                     lower_main_return=True, pull_out_jumps=True)376def test_lower_pulled_out_jump():377    doc_string = """If one branch of an if ends in a jump, and control cannot378    fall out the bottom of the other branch, and pull_out_jumps is379    True, then the jump is lifted outside the if.380    Verify that this lowering occurs during the same pass as the381    lowering of other jumps by checking that extra temporary382    variables aren't generated.383    """384    input_sexp = make_test_case('main', 'void', (385            complex_if('a', return_()) +386            loop(simple_if('b', simple_if('c', break_(), continue_()),387                           return_())) +388            assign_x('d', const_float(1))389            ))390    # Note: optimization produces two other effects: the break391    # gets lifted out of the if statements, and the code after the392    # loop gets guarded so that it only executes if the return393    # flag is clear.394    expected_sexp = make_test_case('main', 'void', (395            declare_execute_flag() +396            declare_return_flag() +397            complex_if('a', lowered_return()) +398            if_execute_flag(399                loop(simple_if('b', simple_if('c', [], continue_()),400                               lowered_return_simple()) +401                     break_()) +402                if_not_return_flag(assign_x('d', const_float(1))))403            ))404    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_pulled_out_jump',405                     lower_main_return=True, pull_out_jumps=True)406def test_lower_breaks_1():407    doc_string = """If a loop contains an unconditional break at the bottom of408    it, it should not be lowered."""409    input_sexp = make_test_case('main', 'void', (410            loop(assign_x('a', const_float(1)) +411                 break_())412            ))413    expected_sexp = input_sexp414    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_breaks_1', lower_break=True)415def test_lower_breaks_2():416    doc_string = """If a loop contains a conditional break at the bottom of it,417    it should not be lowered if it is in the then-clause.418    """419    input_sexp = make_test_case('main', 'void', (420            loop(assign_x('a', const_float(1)) +421                 simple_if('b', break_()))422            ))423    expected_sexp = input_sexp424    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_breaks_2', lower_break=True)425def test_lower_breaks_3():426    doc_string = """If a loop contains a conditional break at the bottom of it,427    it should not be lowered if it is in the then-clause, even if428    there are statements preceding the break.429    """430    input_sexp = make_test_case('main', 'void', (431            loop(assign_x('a', const_float(1)) +432                 simple_if('b', (assign_x('c', const_float(1)) +433                                 break_())))434            ))435    expected_sexp = input_sexp436    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_breaks_3', lower_break=True)437def test_lower_breaks_4():438    doc_string = """If a loop contains a conditional break at the bottom of it,439    it should not be lowered if it is in the else-clause.440    """441    input_sexp = make_test_case('main', 'void', (442            loop(assign_x('a', const_float(1)) +443                 simple_if('b', [], break_()))444            ))445    expected_sexp = input_sexp446    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_breaks_4', lower_break=True)447def test_lower_breaks_5():448    doc_string = """If a loop contains a conditional break at the bottom of it,449    it should not be lowered if it is in the else-clause, even if450    there are statements preceding the break.451    """452    input_sexp = make_test_case('main', 'void', (453            loop(assign_x('a', const_float(1)) +454                 simple_if('b', [], (assign_x('c', const_float(1)) +455                                     break_())))456            ))457    expected_sexp = input_sexp458    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_breaks_5', lower_break=True)459def test_lower_breaks_6():460    doc_string = """If a loop contains conditional breaks and continues, and461    ends in an unconditional break, then the unconditional break462    needs to be lowered, because it will no longer be at the end463    of the loop after the final break is added.464    """465    input_sexp = make_test_case('main', 'void', (466            loop(simple_if('a', (complex_if('b', continue_()) +467                                 complex_if('c', break_()))) +468                 break_())469            ))470    expected_sexp = make_test_case('main', 'void', (471            declare_break_flag() +472            loop(declare_execute_flag() +473                 simple_if(474                    'a',475                    (complex_if('b', lowered_continue()) +476                     if_execute_flag(477                            complex_if('c', lowered_break())))) +478                 if_execute_flag(lowered_break_simple()) +479                 final_break())480            ))481    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_breaks_6',482                     lower_break=True, lower_continue=True)483def test_lower_guarded_conditional_break():484    doc_string = """Normally a conditional break at the end of a loop isn't485    lowered, however if the conditional break gets placed inside486    an if(execute_flag) because of earlier lowering of continues,487    then the break needs to be lowered.488    """489    input_sexp = make_test_case('main', 'void', (490            loop(complex_if('a', continue_()) +491                 simple_if('b', break_()))492            ))493    expected_sexp = make_test_case('main', 'void', (494            declare_break_flag() +495            loop(declare_execute_flag() +496                 complex_if('a', lowered_continue()) +497                 if_execute_flag(simple_if('b', lowered_break())) +498                 final_break())499            ))500    create_test_case(doc_string, input_sexp, expected_sexp, 'lower_guarded_conditional_break',501                     lower_break=True, lower_continue=True)502def test_remove_continue_at_end_of_loop():503    doc_string = """Test that a redundant continue-statement at the end of a504    loop is removed.505    """506    input_sexp = make_test_case('main', 'void', (507            loop(assign_x('a', const_float(1)) +508                 continue_())509            ))510    expected_sexp = make_test_case('main', 'void', (511            loop(assign_x('a', const_float(1)))512            ))513    create_test_case(doc_string, input_sexp, expected_sexp, 'remove_continue_at_end_of_loop')514def test_lower_return_void_at_end_of_loop():515    doc_string = """Test that a return of void at the end of a loop is properly516    lowered.517    """518    input_sexp = make_test_case('main', 'void', (519            loop(assign_x('a', const_float(1)) +520                 return_()) +521            assign_x('b', const_float(2))522            ))523    expected_sexp = make_test_case('main', 'void', (524            declare_return_flag() +525            loop(assign_x('a', const_float(1)) +526                 lowered_return_simple() +527                 break_()) +528            if_not_return_flag(assign_x('b', const_float(2)))529            ))530    create_test_case(doc_string, input_sexp, input_sexp, 'return_void_at_end_of_loop_lower_nothing')531    create_test_case(doc_string, input_sexp, expected_sexp, 'return_void_at_end_of_loop_lower_return',532                     lower_main_return=True)533    create_test_case(doc_string, input_sexp, expected_sexp, 'return_void_at_end_of_loop_lower_return_and_break',534                     lower_main_return=True, lower_break=True)535def test_lower_return_non_void_at_end_of_loop():536    doc_string = """Test that a non-void return at the end of a loop is537    properly lowered.538    """539    input_sexp = make_test_case('sub', 'float', (540            loop(assign_x('a', const_float(1)) +541                 return_(const_float(2))) +542            assign_x('b', const_float(3)) +543            return_(const_float(4))544            ))545    expected_sexp = make_test_case('sub', 'float', (546            declare_execute_flag() +547            declare_return_value() +548            declare_return_flag() +549            loop(assign_x('a', const_float(1)) +550                 lowered_return_simple(const_float(2)) +551                 break_()) +552            if_not_return_flag(assign_x('b', const_float(3)) +553                               lowered_return(const_float(4))) +554            final_return()555            ))556    create_test_case(doc_string, input_sexp, input_sexp, 'return_non_void_at_end_of_loop_lower_nothing')557    create_test_case(doc_string, input_sexp, expected_sexp, 'return_non_void_at_end_of_loop_lower_return',558                     lower_sub_return=True)559    create_test_case(doc_string, input_sexp, expected_sexp, 'return_non_void_at_end_of_loop_lower_return_and_break',...
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