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//: Mu scenarios. This will get long, but these are the tests we want to //: support in this layer. //: We avoid raw numeric locations in Mu -- except in scenarios, where they're //: handy to check the values of specific variables :(scenarios run_mu_scenario) :(scenario scenario_block) scenario foo [ run [ 1:num <- copy 13 ] memory-should-contain [ 1 <- 13 ] ] # checks are inside scenario :(scenario scenario_multiple_blocks) scenario foo [ run [ 1:num <- copy 13 ] memory-should-contain [ 1 <- 13 ] run [ 2:num <- copy 13 ] memory-should-contain [ 1 <- 13 2 <- 13 ] ] # checks are inside scenario :(scenario scenario_check_memory_and_trace) scenario foo [ run [ 1:num <- copy 13 trace 1, [a], [a b c] ] memory-should-contain [ 1 <- 13 ] trace-should-contain [ a: a b c ] trace-should-not-contain [ a: x y z ] ] # checks are inside scenario //:: Core data structure :(before "End Types") struct scenario { string name; string to_run; void clear() { name.clear(); to_run.clear(); } }; :(before "End Globals") vector<scenario> Scenarios, Scenarios_snapshot; set<string> Scenario_names, Scenario_names_snapshot; :(before "End save_snapshots") Scenarios_snapshot = Scenarios; Scenario_names_snapshot = Scenario_names; :(before "End restore_snapshots") Scenarios = Scenarios_snapshot; Scenario_names = Scenario_names_snapshot; //:: Parse the 'scenario' form. //: Simply store the text of the scenario. :(before "End Command Handlers") else if (command == "scenario") { scenario result = parse_scenario(in); if (!result.name.empty()) Scenarios.push_back(result); } else if (command == "pending-scenario") { // for temporary use only parse_scenario(in); // discard } :(code) scenario parse_scenario(istream& in) { scenario result; result.name = next_word(in); if (contains_key(Scenario_names, result.name)) raise << "duplicate scenario name: '" << result.name << "'\n" << end(); Scenario_names.insert(result.name); if (result.name.empty()) { assert(!has_data(in)); raise << "incomplete scenario at end of file\n" << end(); return result; } skip_whitespace_and_comments(in); if (in.peek() != '[') { raise << "Expected '[' after scenario '" << result.name << "'\n" << end(); exit(0); } // scenarios are take special 'code' strings so we need to ignore brackets // inside comments result.to_run = slurp_quoted(in); // delete [] delimiters if (!starts_with(result.to_run, "[")) { raise << "scenario " << result.name << " should start with '['\n" << end(); result.clear(); return result; } result.to_run.erase(0, 1); if (result.to_run.at(SIZE(result.to_run)-1) != ']') { raise << "scenario " << result.name << " has an unbalanced '['\n" << end(); result.clear(); return result; } result.to_run.erase(SIZE(result.to_run)-1); return result; } :(scenario read_scenario_with_bracket_in_comment) scenario foo [ # ']' in comment 1:num <- copy 0 ] +run: {1: "number"} <- copy {0: "literal"} :(scenario read_scenario_with_bracket_in_comment_in_nested_string) scenario foo [ 1:text <- new [# not a comment] ] +run: {1: ("address" "array" "character")} <- new {"# not a comment": "literal-string"} :(scenarios run) :(scenario duplicate_scenarios) % Hide_errors = true; scenario foo [ 1:num <- copy 0 ] scenario foo [ 2:num <- copy 0 ] +error: duplicate scenario name: 'foo' //:: Run scenarios when we run './mu test'. //: Treat the text of the scenario as a regular series of instructions. :(before "End Globals") int Num_core_mu_scenarios = 0; :(after "Check For .mu Files") Num_core_mu_scenarios = SIZE(Scenarios); :(before "End Tests") Hide_missing_default_space_errors = false; if (Num_core_mu_scenarios > 0) { time(&t); cerr << "Mu tests: " << ctime(&t); for (int i = 0; i < Num_core_mu_scenarios; ++i) { //? cerr << '\n' << i << ": " << Scenarios.at(i).name; run_mu_scenario(Scenarios.at(i)); if (Passed) cerr << "."; else ++Num_failures; } cerr << "\n"; } run_app_scenarios: if (Num_core_mu_scenarios != SIZE(Scenarios)) { time(&t); cerr << "App tests: " << ctime(&t); for (int i = Num_core_mu_scenarios; i < SIZE(Scenarios); ++i) { //? cerr << '\n' << i << ": " << Scenarios.at(i).name; run_mu_scenario(Scenarios.at(i)); if (Passed) cerr << "."; else ++Num_failures; } cerr << "\n"; } //: For faster debugging, support running tests for just the Mu app(s) we are //: loading. :(before "End Globals") bool Test_only_app = false; :(before "End Commandline Options(*arg)") else if (is_equal(*arg, "--test-only-app")) { Test_only_app = true; } :(after "End Test Run Initialization") if (Test_only_app && Num_core_mu_scenarios < SIZE(Scenarios)) { goto run_app_scenarios; } //: Convenience: run a single named scenario. :(after "Test Runs") for (int i = 0; i < SIZE(Scenarios); ++i) { if (Scenarios.at(i).name == argv[argc-1]) { if (Start_tracing) { Trace_stream = new trace_stream; Save_trace = true; } run_mu_scenario(Scenarios.at(i)); if (Passed) cerr << ".\n"; return 0; } } :(before "End Globals") // this isn't a constant, just a global of type const* const scenario* Current_scenario = NULL; :(code) void run_mu_scenario(const scenario& s) { Current_scenario = &s; bool not_already_inside_test = !Trace_stream; //? cerr << s.name << '\n'; if (not_already_inside_test) { Trace_stream = new trace_stream; setup(); } vector<recipe_ordinal> tmp = load("recipe scenario_"+s.name+" [ "+s.to_run+" ]"); mark_autogenerated(tmp.at(0)); bind_special_scenario_names(tmp.at(0)); transform_all(); if (!trace_contains_errors()) run(tmp.front()); // End Mu Test Teardown if (!Hide_errors && trace_contains_errors() && !Scenario_testing_scenario) Passed = false; if (not_already_inside_test && Trace_stream) { teardown(); if (Save_trace) { ofstream fout("last_trace"); fout << Trace_stream->readable_contents(""); fout.close(); } delete Trace_stream; Trace_stream = NULL; } Current_scenario = NULL; } //: Permit numeric locations to be accessed in scenarios. :(before "End check_default_space Special-cases") // user code should never create recipes with underscores in their names if (caller.name.find("scenario_") == 0) return; // skip Mu scenarios which will use raw memory locations if (caller.name.find("run_") == 0) return; // skip calls to 'run', which should be in scenarios and will also use raw memory locations //: Some variables for fake resources always get special /raw addresses in scenarios. :(code) // Should contain everything passed by is_special_name but failed by is_disqualified. void bind_special_scenario_names(const recipe_ordinal r) { // Special Scenario Variable Names(r) // End Special Scenario Variable Names(r) } :(before "Done Placing Ingredient(ingredient, inst, caller)") maybe_make_raw(ingredient, caller); :(before "Done Placing Product(product, inst, caller)") maybe_make_raw(product, caller); :(code) void maybe_make_raw(reagent& r, const recipe& caller) { if (!is_special_name(r.name)) return; if (starts_with(caller.name, "scenario_")) r.properties.push_back(pair<string, string_tree*>("raw", NULL)); // End maybe_make_raw } //: Test. :(before "End is_special_name Special-cases") if (s == "__maybe_make_raw_test__") return true; :(before "End Special Scenario Variable Names(r)") //: ugly: we only need this for this one test, but need to define it for all time Name[r]["__maybe_make_raw_test__"] = Reserved_for_tests-1; :(code) void test_maybe_make_raw() { // check that scenarios can use local-scope and special variables together vector<recipe_ordinal> tmp = load( "def scenario_foo [\n" " local-scope\n" " __maybe_make_raw_test__:num <- copy 34\n" "]\n"); mark_autogenerated(tmp.at(0)); bind_special_scenario_names(tmp.at(0)); transform_all(); run(tmp.at(0)); CHECK_TRACE_DOESNT_CONTAIN_ERRORS(); } //: Watch out for redefinitions of scenario routines. We should never ever be //: doing that, regardless of anything else. :(scenario forbid_redefining_scenario_even_if_forced) % Hide_errors = true; % Disable_redefine_checks = true; def scenario-foo [ 1:num <- copy 34 ] def scenario-foo [ 1:num <- copy 35 ] +error: redefining recipe scenario-foo :(scenario scenario_containing_parse_error) % Hide_errors = true; scenario foo [ memory-should-contain [ 1 <- 0 # missing ']' ] # no crash :(scenario scenario_containing_transform_error) % Hide_errors = true; def main [ local-scope add x, 1 ] # no crash :(after "bool should_check_for_redefine(const string& recipe_name)") if (recipe_name.find("scenario-") == 0) return true; //:: The special instructions we want to support inside scenarios. //: These are easy to support in an interpreter, but will require more work //: when we eventually build a compiler. //: 'run' is a purely lexical convenience to separate the code actually being //: tested from any setup or teardown :(scenario run) def main [ run [ 1:num <- copy 13 ] ] +mem: storing 13 in location 1 :(before "End Rewrite Instruction(curr, recipe result)") if (curr.name == "run") { // Just inline all instructions inside the run block in the containing // recipe. 'run' is basically a comment; pretend it doesn't exist. istringstream in2("[\n"+curr.ingredients.at(0).name+"\n]\n"); slurp_body(in2, result); curr.clear(); } :(scenario run_multiple) def main [ run [ 1:num <- copy 13 ] run [ 2:num <- copy 13 ] ] +mem: storing 13 in location 1 +mem: storing 13 in location 2 //: 'memory-should-contain' raises errors if specific locations aren't as expected //: Also includes some special support for checking strings. :(before "End Globals") bool Scenario_testing_scenario = false; :(before "End Setup") Scenario_testing_scenario = false; :(scenario memory_check) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ memory-should-contain [ 1 <- 13 ] ] +run: checking location 1 +error: expected location '1' to contain 13 but saw 0 :(before "End Primitive Recipe Declarations") MEMORY_SHOULD_CONTAIN, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "memory-should-contain", MEMORY_SHOULD_CONTAIN); :(before "End Primitive Recipe Checks") case MEMORY_SHOULD_CONTAIN: { break; } :(before "End Primitive Recipe Implementations") case MEMORY_SHOULD_CONTAIN: { if (!Passed) break; check_memory(current_instruction().ingredients.at(0).name); break; } :(code) void check_memory(const string& s) { istringstream in(s); in >> std::noskipws; set<int> locations_checked; while (true) { skip_whitespace_and_comments(in); if (!has_data(in)) break; string lhs = next_word(in); if (lhs.empty()) { assert(!has_data(in)); raise << "incomplete 'memory-should-contain' block at end of file (0)\n" << end(); return; } if (!is_integer(lhs)) { check_type(lhs, in); continue; } int address = to_integer(lhs); skip_whitespace_and_comments(in); string _assign; in >> _assign; assert(_assign == "<-"); skip_whitespace_and_comments(in); string rhs = next_word(in); if (rhs.empty()) { assert(!has_data(in)); raise << "incomplete 'memory-should-contain' block at end of file (1)\n" << end(); return; } if (!is_integer(rhs) && !is_noninteger(rhs)) { if (Current_scenario && !Scenario_testing_scenario) // genuine test in a .mu file raise << "\nF - " << Current_scenario->name << ": location '" << address << "' can't contain non-number " << rhs << "\n" << end(); else // just testing scenario support raise << "location '" << address << "' can't contain non-number " << rhs << '\n' << end(); if (!Scenario_testing_scenario) Passed = false; return; } double value = to_double(rhs); if (contains_key(locations_checked, address)) raise << "duplicate expectation for location '" << address << "'\n" << end(); trace(9999, "run") << "checking location " << address << end(); if (get_or_insert(Memory, address) != value) { if (Current_scenario && !Scenario_testing_scenario) { // genuine test in a .mu file raise << "\nF - " << Current_scenario->name << ": expected location '" << address << "' to contain " << no_scientific(value) << " but saw " << no_scientific(get_or_insert(Memory, address)) << '\n' << end(); } else { // just testing scenario support raise << "expected location '" << address << "' to contain " << no_scientific(value) << " but saw " << no_scientific(get_or_insert(Memory, address)) << '\n' << end(); } if (!Scenario_testing_scenario) Passed = false; return; } locations_checked.insert(address); } } void check_type(const string& lhs, istream& in) { reagent x(lhs); if (is_mu_array(x.type) && is_mu_character(array_element(x.type))) { x.set_value(to_integer(x.name)); skip_whitespace_and_comments(in); string _assign = next_word(in); if (_assign.empty()) { assert(!has_data(in)); raise << "incomplete 'memory-should-contain' block at end of file (2)\n" << end(); return; } assert(_assign == "<-"); skip_whitespace_and_comments(in); string literal = next_word(in); if (literal.empty()) { assert(!has_data(in)); raise << "incomplete 'memory-should-contain' block at end of file (3)\n" << end(); return; } int address = x.value; // exclude quoting brackets assert(*literal.begin() == '['); literal.erase(literal.begin()); assert(*--literal.end() == ']'); literal.erase(--literal.end()); check_string(address, literal); return; } // End Scenario Type Special-cases raise << "don't know how to check memory for '" << lhs << "'\n" << end(); } void check_string(int address, const string& literal) { trace(9999, "run") << "checking string length at " << address << end(); if (get_or_insert(Memory, address) != SIZE(literal)) { if (Current_scenario && !Scenario_testing_scenario) raise << "\nF - " << Current_scenario->name << ": expected location '" << address << "' to contain length " << SIZE(literal) << " of string [" << literal << "] but saw " << no_scientific(get_or_insert(Memory, address)) << " (" << read_mu_text(address-/*fake refcount*/1) << ")\n" << end(); else raise << "expected location '" << address << "' to contain length " << SIZE(literal) << " of string [" << literal << "] but saw " << no_scientific(get_or_insert(Memory, address)) << '\n' << end(); if (!Scenario_testing_scenario) Passed = false; return; } ++address; // now skip length for (int i = 0; i < SIZE(literal); ++i) { trace(9999, "run") << "checking location " << address+i << end(); if (get_or_insert(Memory, address+i) != literal.at(i)) { if (Current_scenario && !Scenario_testing_scenario) { // genuine test in a .mu file raise << "\nF - " << Current_scenario->name << ": expected location " << (address+i) << " to contain " << literal.at(i) << " but saw " << no_scientific(get_or_insert(Memory, address+i)) << " ('" << static_cast<char>(get_or_insert(Memory, address+i)) << "')\n" << end(); } else { // just testing scenario support raise << "expected location " << (address+i) << " to contain " << literal.at(i) << " but saw " << no_scientific(get_or_insert(Memory, address+i)) << '\n' << end(); } if (!Scenario_testing_scenario) Passed = false; return; } } } :(scenario memory_check_multiple) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ memory-should-contain [ 1 <- 0 1 <- 0 ] ] +error: duplicate expectation for location '1' :(scenario memory_check_string_length) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ 1:num <- copy 3 2:num <- copy 97 # 'a' 3:num <- copy 98 # 'b' 4:num <- copy 99 # 'c' memory-should-contain [ 1:array:character <- [ab] ] ] +error: expected location '1' to contain length 2 of string [ab] but saw 3 :(scenario memory_check_string) def main [ 1:num <- copy 3 2:num <- copy 97 # 'a' 3:num <- copy 98 # 'b' 4:num <- copy 99 # 'c' memory-should-contain [ 1:array:character <- [abc] ] ] +run: checking string length at 1 +run: checking location 2 +run: checking location 3 +run: checking location 4 :(scenario memory_invalid_string_check) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ memory-should-contain [ 1 <- [abc] ] ] +error: location '1' can't contain non-number [abc] :(scenario memory_check_with_comment) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ memory-should-contain [ 1 <- 34 # comment ] ] -error: location 1 can't contain non-number 34 # comment # but there'll be an error signalled by memory-should-contain //: 'trace-should-contain' is like the '+' lines in our scenarios so far // Like runs of contiguous '+' lines, order is important. The trace checks // that the lines are present *and* in the specified sequence. (There can be // other lines in between.) :(scenario trace_check_fails) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ trace-should-contain [ a: b a: d ] ] +error: missing [b] in trace with label 'a' :(before "End Primitive Recipe Declarations") TRACE_SHOULD_CONTAIN, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "trace-should-contain", TRACE_SHOULD_CONTAIN); :(before "End Primitive Recipe Checks") case TRACE_SHOULD_CONTAIN: { break; } :(before "End Primitive Recipe Implementations") case TRACE_SHOULD_CONTAIN: { if (!Passed) break; check_trace(current_instruction().ingredients.at(0).name); break; } :(code) // simplified version of check_trace_contents() that emits errors rather // than just printing to stderr void check_trace(const string& expected) { Trace_stream->newline(); vector<trace_line> expected_lines = parse_trace(expected); if (expected_lines.empty()) return; int curr_expected_line = 0; for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin(); p != Trace_stream->past_lines.end(); ++p) { if (expected_lines.at(curr_expected_line).label != p->label) continue; if (expected_lines.at(curr_expected_line).contents != trim(p->contents)) continue; // match ++curr_expected_line; if (curr_expected_line == SIZE(expected_lines)) return; } if (Current_scenario && !Scenario_testing_scenario) raise << "\nF - " << Current_scenario->name << ": missing [" << expected_lines.at(curr_expected_line).contents << "] " << "in trace with label '" << expected_lines.at(curr_expected_line).label << "'\n" << end(); else raise << "missing [" << expected_lines.at(curr_expected_line).contents << "] " << "in trace with label '" << expected_lines.at(curr_expected_line).label << "'\n" << end(); if (!Hide_errors) DUMP(expected_lines.at(curr_expected_line).label); if (!Scenario_testing_scenario) Passed = false; } vector<trace_line> parse_trace(const string& expected) { vector<string> buf = split(expected, "\n"); vector<trace_line> result; for (int i = 0; i < SIZE(buf); ++i) { buf.at(i) = trim(buf.at(i)); if (buf.at(i).empty()) continue; int delim = buf.at(i).find(": "); if (delim == -1) { raise << Current_scenario->name << ": lines in 'trace-should-contain' should be of the form <label>: <contents>. Both parts are required.\n" << end(); result.clear(); return result; } result.push_back(trace_line(trim(buf.at(i).substr(0, delim)), trim(buf.at(i).substr(delim+2)))); } return result; } :(scenario trace_check_fails_in_nonfirst_line) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ run [ trace 1, [a], [b] ] trace-should-contain [ a: b a: d ] ] +error: missing [d] in trace with label 'a' :(scenario trace_check_passes_silently) % Scenario_testing_scenario = true; def main [ run [ trace 1, [a], [b] ] trace-should-contain [ a: b ] ] -error: missing [b] in trace with label 'a' $error: 0 //: 'trace-should-not-contain' is like the '-' lines in our scenarios so far //: Each trace line is separately checked for absense. Order is *not* //: important, so you can't say things like "B should not exist after A." :(scenario trace_negative_check_fails) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ run [ trace 1, [a], [b] ] trace-should-not-contain [ a: b ] ] +error: unexpected [b] in trace with label 'a' :(before "End Primitive Recipe Declarations") TRACE_SHOULD_NOT_CONTAIN, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "trace-should-not-contain", TRACE_SHOULD_NOT_CONTAIN); :(before "End Primitive Recipe Checks") case TRACE_SHOULD_NOT_CONTAIN: { break; } :(before "End Primitive Recipe Implementations") case TRACE_SHOULD_NOT_CONTAIN: { if (!Passed) break; check_trace_missing(current_instruction().ingredients.at(0).name); break; } :(code) // simplified version of check_trace_contents() that emits errors rather // than just printing to stderr bool check_trace_missing(const string& in) { Trace_stream->newline(); vector<trace_line> lines = parse_trace(in); for (int i = 0; i < SIZE(lines); ++i) { if (trace_count(lines.at(i).label, lines.at(i).contents) != 0) { raise << "unexpected [" << lines.at(i).contents << "] in trace with label '" << lines.at(i).label << "'\n" << end(); if (!Scenario_testing_scenario) Passed = false; return false; } } return true; } :(scenario trace_negative_check_passes_silently) % Scenario_testing_scenario = true; def main [ trace-should-not-contain [ a: b ] ] -error: unexpected [b] in trace with label 'a' $error: 0 :(scenario trace_negative_check_fails_on_any_unexpected_line) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ run [ trace 1, [a], [d] ] trace-should-not-contain [ a: b a: d ] ] +error: unexpected [d] in trace with label 'a' :(scenario trace_count_check) def main [ run [ trace 1, [a], [foo] ] check-trace-count-for-label 1, [a] ] # checks are inside scenario :(before "End Primitive Recipe Declarations") CHECK_TRACE_COUNT_FOR_LABEL, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "check-trace-count-for-label", CHECK_TRACE_COUNT_FOR_LABEL); :(before "End Primitive Recipe Checks") case CHECK_TRACE_COUNT_FOR_LABEL: { if (SIZE(inst.ingredients) != 2) { raise << maybe(get(Recipe, r).name) << "'check-trace-count-for-label' requires exactly two ingredients, but got '" << to_original_string(inst) << "'\n" << end(); break; } if (!is_mu_number(inst.ingredients.at(0))) { raise << maybe(get(Recipe, r).name) << "first ingredient of 'check-trace-count-for-label' should be a number (count), but got '" << inst.ingredients.at(0).original_string << "'\n" << end(); break; } if (!is_literal_text(inst.ingredients.at(1))) { raise << maybe(get(Recipe, r).name) << "second ingredient of 'check-trace-count-for-label' should be a literal string (label), but got '" << inst.ingredients.at(1).original_string << "'\n" << end(); break; } break; } :(before "End Primitive Recipe Implementations") case CHECK_TRACE_COUNT_FOR_LABEL: { if (!Passed) break; int expected_count = ingredients.at(0).at(0); string label = current_instruction().ingredients.at(1).name; int count = trace_count(label); if (count != expected_count) { if (Current_scenario && !Scenario_testing_scenario) { // genuine test in a .mu file raise << "\nF - " << Current_scenario->name << ": " << maybe(current_recipe_name()) << "expected " << expected_count << " lines in trace with label '" << label << "' in trace: " << end(); DUMP(label); } else { // just testing scenario support raise << maybe(current_recipe_name()) << "expected " << expected_count << " lines in trace with label '" << label << "' in trace\n" << end(); } if (!Scenario_testing_scenario) Passed = false; } break; } :(scenario trace_count_check_2) % Scenario_testing_scenario = true; % Hide_errors = true; def main [ run [ trace 1, [a], [foo] ] check-trace-count-for-label 2, [a] ] +error: main: expected 2 lines in trace with label 'a' in trace //: Minor detail: ignore 'system' calls in scenarios, since anything we do //: with them is by definition impossible to test through Mu. :(after "case _SYSTEM:") if (Current_scenario) break; //:: Warn if people use '_' manually in function names. They're reserved for internal use. :(scenario recipe_name_with_underscore) % Hide_errors = true; def foo_bar [ ] +error: foo_bar: don't create recipes with '_' in the name :(before "End recipe Fields") bool is_autogenerated; :(before "End recipe Constructor") is_autogenerated = false; :(code) void mark_autogenerated(recipe_ordinal r) { get(Recipe, r).is_autogenerated = true; } :(after "void transform_all()") for (map<recipe_ordinal, recipe>::iterator p = Recipe.begin(); p != Recipe.end(); ++p) { const recipe& r = p->second; if (r.name.find('_') == string::npos) continue; if (r.is_autogenerated) continue; // created by previous call to transform_all() raise << r.name << ": don't create recipes with '_' in the name\n" << end(); } //:: Helpers :(code) // just for the scenarios running scenarios in C++ layers void run_mu_scenario(const string& form) { Scenario_names.clear(); istringstream in(form); in >> std::noskipws; skip_whitespace_and_comments(in); string _scenario = next_word(in); if (_scenario.empty()) { assert(!has_data(in)); raise << "no scenario in string passed into run_mu_scenario()\n" << end(); return; } assert(_scenario == "scenario"); scenario s = parse_scenario(in); run_mu_scenario(s); }


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