459 lines
18 KiB
C++
459 lines
18 KiB
C++
//: Clean syntax to manipulate and check the screen in scenarios.
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//: Instructions 'assume-screen' and 'screen-should-contain' implicitly create
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//: a variable called 'screen' that is accessible to later instructions in the
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//: scenario. 'screen-should-contain' can check unicode characters in the fake
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//: screen
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//: first make sure we don't mangle these instructions in other transforms
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:(before "End initialize_transform_rewrite_literal_string_to_text()")
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recipes_taking_literal_strings.insert("screen-should-contain");
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recipes_taking_literal_strings.insert("screen-should-contain-in-color");
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:(code)
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void test_screen_in_scenario() {
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run_mu_scenario(
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"scenario screen-in-scenario [\n"
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" local-scope\n"
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" assume-screen 5/width, 3/height\n"
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" run [\n"
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" a:char <- copy 97/a\n"
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" screen:&:screen <- print screen:&:screen, a\n"
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" ]\n"
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" screen-should-contain [\n"
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// 01234
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" .a .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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"]\n"
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);
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// checks are inside scenario
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}
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void test_screen_in_scenario_unicode() {
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// screen-should-contain can check unicode characters in the fake screen\n"
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run_mu_scenario(
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"scenario screen-in-scenario-unicode [\n"
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" local-scope\n"
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" assume-screen 5/width, 3/height\n"
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" run [\n"
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" lambda:char <- copy 955/greek-small-lambda\n"
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" screen:&:screen <- print screen:&:screen, lambda\n"
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" a:char <- copy 97/a\n"
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" screen:&:screen <- print screen:&:screen, a\n"
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" ]\n"
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" screen-should-contain [\n"
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// 01234
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" .λa .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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"]\n"
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);
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// checks are inside scenario
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}
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void test_screen_in_scenario_color() {
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run_mu_scenario(
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"scenario screen-in-scenario-color [\n"
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" local-scope\n"
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" assume-screen 5/width, 3/height\n"
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" run [\n"
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" lambda:char <- copy 955/greek-small-lambda\n"
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" screen:&:screen <- print screen:&:screen, lambda, 1/red\n"
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" a:char <- copy 97/a\n"
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" screen:&:screen <- print screen:&:screen, a, 7/white\n"
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" ]\n"
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// screen-should-contain shows everything
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" screen-should-contain [\n"
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// 01234
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" .λa .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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// screen-should-contain-in-color filters out everything except the
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// given color, all you see is the 'a' in white.
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" screen-should-contain-in-color 7/white, [\n"
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// 01234
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" . a .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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// ..and the λ in red.
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" screen-should-contain-in-color 1/red, [\n"
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// 01234
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" .λ .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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"]\n"
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);
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// checks are inside scenario
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}
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void test_screen_in_scenario_error() {
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Scenario_testing_scenario = true;
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Hide_errors = true;
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run_mu_scenario(
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"scenario screen-in-scenario-error [\n"
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" local-scope\n"
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" assume-screen 5/width, 3/height\n"
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" run [\n"
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" a:char <- copy 97/a\n"
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" screen:&:screen <- print screen:&:screen, a\n"
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" ]\n"
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" screen-should-contain [\n"
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// 01234
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" .b .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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"]\n"
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);
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CHECK_TRACE_CONTENTS(
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"error: F - screen-in-scenario-error: expected screen location (0, 0) to contain 98 ('b') instead of 97 ('a')\n"
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);
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}
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void test_screen_in_scenario_color_error() {
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Scenario_testing_scenario = true;
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Hide_errors = true;
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run_mu_scenario(
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"scenario screen-in-scenario-color-error [\n"
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" local-scope\n"
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" assume-screen 5/width, 3/height\n"
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" run [\n"
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" a:char <- copy 97/a\n"
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" screen:&:screen <- print screen:&:screen, a, 1/red\n"
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" ]\n"
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" screen-should-contain-in-color 2/green, [\n"
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// 01234
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" .a .\n"
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" . .\n"
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" . .\n"
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" ]\n"
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"]\n"
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);
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CHECK_TRACE_CONTENTS(
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"error: F - screen-in-scenario-color-error: expected screen location (0, 0) to contain 'a' in color 2 instead of 1\n"
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);
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}
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void test_convert_names_does_not_fail_when_mixing_special_names_and_numeric_locations() {
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Scenario_testing_scenario = true;
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run(
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"def main [\n"
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" screen:num <- copy 1:num\n"
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"]\n"
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);
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CHECK_TRACE_DOESNT_CONTAIN("error: mixing variable names and numeric addresses in main");
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CHECK_TRACE_COUNT("error", 0);
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}
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//: It's easier to implement assume-screen and other similar scenario-only
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//: primitives if they always write to a fixed location. So we'll assign a
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//: single fixed location for the per-scenario screen, keyboard, file system,
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//: etc. Carve space for these fixed locations out of the reserved-for-test
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//: locations.
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:(before "End Globals")
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extern const int Max_variables_in_scenarios = Reserved_for_tests-100;
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int Next_predefined_global_for_scenarios = Max_variables_in_scenarios;
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:(before "End Reset")
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assert(Next_predefined_global_for_scenarios < Reserved_for_tests);
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:(before "End Globals")
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// Scenario Globals.
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extern const int SCREEN = next_predefined_global_for_scenarios(/*size_of(address:screen)*/2);
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// End Scenario Globals.
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:(code)
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int next_predefined_global_for_scenarios(int size) {
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int result = Next_predefined_global_for_scenarios;
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Next_predefined_global_for_scenarios += size;
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return result;
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}
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//: give 'screen' a fixed location in scenarios
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:(before "End Special Scenario Variable Names(r)")
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Name[r]["screen"] = SCREEN;
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//: make 'screen' always a raw location in scenarios
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:(before "End is_special_name Special-cases")
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if (s == "screen") return true;
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:(before "End Rewrite Instruction(curr, recipe result)")
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// rewrite 'assume-screen width, height' to
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// 'screen:&:screen <- new-fake-screen width, height'
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if (curr.name == "assume-screen") {
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curr.name = "new-fake-screen";
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if (!curr.products.empty()) {
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raise << result.name << ": 'assume-screen' has no products\n" << end();
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}
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else if (!starts_with(result.name, "scenario_")) {
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raise << result.name << ": 'assume-screen' can't be called here, only in scenarios\n" << end();
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}
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else {
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assert(curr.products.empty());
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curr.products.push_back(reagent("screen:&:screen/raw"));
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curr.products.at(0).set_value(SCREEN);
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}
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}
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:(code)
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void test_assume_screen_shows_up_in_errors() {
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Hide_errors = true;
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run_mu_scenario(
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"scenario assume-screen-shows-up-in-errors [\n"
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" assume-screen width, 5\n"
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"]\n"
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);
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CHECK_TRACE_CONTENTS(
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"error: assume-screen-shows-up-in-errors: missing type for 'width' in 'assume-screen width, 5'\n"
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);
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}
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//: screen-should-contain is a regular instruction
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:(before "End Primitive Recipe Declarations")
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SCREEN_SHOULD_CONTAIN,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "screen-should-contain", SCREEN_SHOULD_CONTAIN);
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:(before "End Primitive Recipe Checks")
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case SCREEN_SHOULD_CONTAIN: {
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if (SIZE(inst.ingredients) != 1) {
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raise << maybe(get(Recipe, r).name) << "'screen-should-contain' requires exactly one ingredient, but got '" << to_original_string(inst) << "'\n" << end();
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break;
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}
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if (!is_literal_text(inst.ingredients.at(0))) {
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raise << maybe(get(Recipe, r).name) << "first ingredient of 'screen-should-contain' should be a literal string, but got '" << inst.ingredients.at(0).original_string << "'\n" << end();
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break;
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}
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case SCREEN_SHOULD_CONTAIN: {
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if (!Passed) break;
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assert(scalar(ingredients.at(0)));
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check_screen(current_instruction().ingredients.at(0).name, -1);
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break;
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}
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:(before "End Primitive Recipe Declarations")
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SCREEN_SHOULD_CONTAIN_IN_COLOR,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "screen-should-contain-in-color", SCREEN_SHOULD_CONTAIN_IN_COLOR);
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:(before "End Primitive Recipe Checks")
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case SCREEN_SHOULD_CONTAIN_IN_COLOR: {
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if (SIZE(inst.ingredients) != 2) {
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raise << maybe(get(Recipe, r).name) << "'screen-should-contain-in-color' requires exactly two ingredients, but got '" << to_original_string(inst) << "'\n" << end();
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break;
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}
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if (!is_mu_number(inst.ingredients.at(0))) {
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raise << maybe(get(Recipe, r).name) << "first ingredient of 'screen-should-contain-in-color' should be a number (color code), but got '" << inst.ingredients.at(0).original_string << "'\n" << end();
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break;
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}
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if (!is_literal_text(inst.ingredients.at(1))) {
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raise << maybe(get(Recipe, r).name) << "second ingredient of 'screen-should-contain-in-color' should be a literal string, but got '" << inst.ingredients.at(1).original_string << "'\n" << end();
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break;
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}
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case SCREEN_SHOULD_CONTAIN_IN_COLOR: {
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if (!Passed) break;
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assert(scalar(ingredients.at(0)));
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assert(scalar(ingredients.at(1)));
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check_screen(current_instruction().ingredients.at(1).name, ingredients.at(0).at(0));
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break;
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}
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:(before "End Types")
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// scan an array of characters in a unicode-aware, bounds-checked manner
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struct raw_string_stream {
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int index;
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const int max;
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const char* buf;
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raw_string_stream(const string&);
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uint32_t get(); // unicode codepoint
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uint32_t peek(); // unicode codepoint
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bool at_end() const;
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void skip_whitespace_and_comments();
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};
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:(code)
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void check_screen(const string& expected_contents, const int color) {
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int screen_location = get_or_insert(Memory, SCREEN+/*skip address alloc id*/1) + /*skip payload alloc id*/1;
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reagent screen("x:screen"); // just to ensure screen.type is reclaimed
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int screen_data_location = find_element_location(screen_location, "data", screen.type, "check_screen"); // type: address:array:character
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assert(screen_data_location >= 0);
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//? cerr << "screen data is at location " << screen_data_location << '\n';
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int screen_data_start = get_or_insert(Memory, screen_data_location+/*skip address alloc id*/1) + /*skip payload alloc id*/1; // type: array:character
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//? cerr << "screen data start is at " << screen_data_start << '\n';
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int screen_width_location = find_element_location(screen_location, "num-columns", screen.type, "check_screen");
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//? cerr << "screen width is at location " << screen_width_location << '\n';
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int screen_width = get_or_insert(Memory, screen_width_location);
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//? cerr << "screen width: " << screen_width << '\n';
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int screen_height_location = find_element_location(screen_location, "num-rows", screen.type, "check_screen");
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//? cerr << "screen height is at location " << screen_height_location << '\n';
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int screen_height = get_or_insert(Memory, screen_height_location);
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//? cerr << "screen height: " << screen_height << '\n';
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int top_index_location= find_element_location(screen_location, "top-idx", screen.type, "check_screen");
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//? cerr << "top of screen is at location " << top_index_location << '\n';
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int top_index = get_or_insert(Memory, top_index_location);
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//? cerr << "top of screen is index " << top_index << '\n';
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raw_string_stream cursor(expected_contents);
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// todo: too-long expected_contents should fail
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for (int i=0, row=top_index/screen_width; i < screen_height; ++i, row=(row+1)%screen_height) {
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cursor.skip_whitespace_and_comments();
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if (cursor.at_end()) break;
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if (cursor.get() != '.') {
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raise << maybe(current_recipe_name()) << "each row of the expected screen should start with a '.'\n" << end();
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if (!Scenario_testing_scenario) Passed = false;
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return;
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}
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int addr = screen_data_start+/*length*/1+row*screen_width* /*size of screen-cell*/2;
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for (int column = 0; column < screen_width; ++column, addr+= /*size of screen-cell*/2) {
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const int cell_color_offset = 1;
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uint32_t curr = cursor.get();
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if (get_or_insert(Memory, addr) == 0 && isspace(curr)) continue;
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if (curr == ' ' && color != -1 && color != get_or_insert(Memory, addr+cell_color_offset)) {
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// filter out other colors
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continue;
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}
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if (get_or_insert(Memory, addr) != 0 && get_or_insert(Memory, addr) == curr) {
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if (color == -1 || color == get_or_insert(Memory, addr+cell_color_offset)) continue;
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// contents match but color is off
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if (!Hide_errors) cerr << '\n';
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raise << "F - " << maybe(current_recipe_name()) << "expected screen location (" << row << ", " << column << ") to contain '" << unicode_character_at(addr) << "' in color " << color << " instead of " << no_scientific(get_or_insert(Memory, addr+cell_color_offset)) << "\n" << end();
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if (!Hide_errors) dump_screen();
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if (!Scenario_testing_scenario) Passed = false;
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return;
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}
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// really a mismatch
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// can't print multi-byte unicode characters in errors just yet. not very useful for debugging anyway.
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char expected_pretty[10] = {0};
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if (curr < 256 && !iscntrl(curr)) {
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// " ('<curr>')"
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expected_pretty[0] = ' ', expected_pretty[1] = '(', expected_pretty[2] = '\'', expected_pretty[3] = static_cast<unsigned char>(curr), expected_pretty[4] = '\'', expected_pretty[5] = ')', expected_pretty[6] = '\0';
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}
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char actual_pretty[10] = {0};
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if (get_or_insert(Memory, addr) < 256 && !iscntrl(get_or_insert(Memory, addr))) {
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// " ('<curr>')"
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actual_pretty[0] = ' ', actual_pretty[1] = '(', actual_pretty[2] = '\'', actual_pretty[3] = static_cast<unsigned char>(get_or_insert(Memory, addr)), actual_pretty[4] = '\'', actual_pretty[5] = ')', actual_pretty[6] = '\0';
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}
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ostringstream color_phrase;
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if (color != -1) color_phrase << " in color " << color;
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if (!Hide_errors) cerr << '\n';
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raise << "F - " << maybe(current_recipe_name()) << "expected screen location (" << row << ", " << column << ") to contain " << curr << expected_pretty << color_phrase.str() << " instead of " << no_scientific(get_or_insert(Memory, addr)) << actual_pretty << '\n' << end();
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if (!Hide_errors) dump_screen();
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if (!Scenario_testing_scenario) Passed = false;
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return;
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}
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if (cursor.get() != '.') {
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raise << maybe(current_recipe_name()) << "row " << row << " of the expected screen is too long\n" << end();
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if (!Scenario_testing_scenario) Passed = false;
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return;
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}
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}
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cursor.skip_whitespace_and_comments();
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if (!cursor.at_end()) {
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raise << maybe(current_recipe_name()) << "expected screen has too many rows\n" << end();
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Passed = false;
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}
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}
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const char* unicode_character_at(int addr) {
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int unicode_code_point = static_cast<int>(get_or_insert(Memory, addr));
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return to_unicode(unicode_code_point);
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}
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raw_string_stream::raw_string_stream(const string& backing) :index(0), max(SIZE(backing)), buf(backing.c_str()) {}
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bool raw_string_stream::at_end() const {
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if (index >= max) return true;
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if (tb_utf8_char_length(buf[index]) > max-index) {
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raise << "unicode string seems corrupted at index "<< index << " character " << static_cast<int>(buf[index]) << '\n' << end();
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return true;
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}
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return false;
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}
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uint32_t raw_string_stream::get() {
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assert(index < max); // caller must check bounds before calling 'get'
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uint32_t result = 0;
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int length = tb_utf8_char_to_unicode(&result, &buf[index]);
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assert(length != TB_EOF);
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index += length;
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return result;
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}
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uint32_t raw_string_stream::peek() {
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assert(index < max); // caller must check bounds before calling 'get'
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uint32_t result = 0;
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int length = tb_utf8_char_to_unicode(&result, &buf[index]);
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assert(length != TB_EOF);
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return result;
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}
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void raw_string_stream::skip_whitespace_and_comments() {
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while (!at_end()) {
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if (isspace(peek())) get();
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else if (peek() == '#') {
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// skip comment
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get();
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while (peek() != '\n') get(); // implicitly also handles CRLF
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}
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else break;
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}
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}
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:(before "End Primitive Recipe Declarations")
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_DUMP_SCREEN,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "$dump-screen", _DUMP_SCREEN);
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:(before "End Primitive Recipe Checks")
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case _DUMP_SCREEN: {
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case _DUMP_SCREEN: {
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dump_screen();
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break;
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}
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:(code)
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void dump_screen() {
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int screen_location = get_or_insert(Memory, SCREEN+/*skip address alloc id*/1) + /*skip payload alloc id*/1;
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reagent screen("x:screen"); // just to ensure screen.type is reclaimed
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int screen_data_location = find_element_location(screen_location, "data", screen.type, "check_screen"); // type: address:array:character
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assert(screen_data_location >= 0);
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//? cerr << "screen data is at location " << screen_data_location << '\n';
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int screen_data_start = get_or_insert(Memory, screen_data_location+/*skip address alloc id*/1) + /*skip payload alloc id*/1; // type: array:character
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//? cerr << "screen data start is at " << screen_data_start << '\n';
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int screen_width_location = find_element_location(screen_location, "num-columns", screen.type, "check_screen");
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//? cerr << "screen width is at location " << screen_width_location << '\n';
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int screen_width = get_or_insert(Memory, screen_width_location);
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//? cerr << "screen width: " << screen_width << '\n';
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int screen_height_location = find_element_location(screen_location, "num-rows", screen.type, "check_screen");
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//? cerr << "screen height is at location " << screen_height_location << '\n';
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int screen_height = get_or_insert(Memory, screen_height_location);
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//? cerr << "screen height: " << screen_height << '\n';
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int top_index_location= find_element_location(screen_location, "top-idx", screen.type, "check_screen");
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//? cerr << "top of screen is at location " << top_index_location << '\n';
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int top_index = get_or_insert(Memory, top_index_location);
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//? cerr << "top of screen is index " << top_index << '\n';
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for (int i=0, row=top_index/screen_width; i < screen_height; ++i, row=(row+1)%screen_height) {
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cerr << '.';
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int curr = screen_data_start+/*length*/1+row*screen_width* /*size of screen-cell*/2;
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for (int col = 0; col < screen_width; ++col) {
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if (get_or_insert(Memory, curr))
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cerr << to_unicode(static_cast<uint32_t>(get_or_insert(Memory, curr)));
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else
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cerr << ' ';
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curr += /*size of screen-cell*/2;
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}
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cerr << ".\n";
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}
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}
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