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LibJS+WebContent+js: Bring console.assert() to spec
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5 changed files with 44 additions and 41 deletions
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@ -149,10 +149,50 @@ ThrowCompletionOr<Value> Console::count_reset()
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return js_undefined();
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}
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Value Console::assert_()
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// 1.1.1. assert(condition, ...data), https://console.spec.whatwg.org/#assert
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ThrowCompletionOr<Value> Console::assert_()
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{
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// 1. If condition is true, return.
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auto condition = vm().argument(0).to_boolean();
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if (condition)
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return js_undefined();
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// 2. Let message be a string without any formatting specifiers indicating generically an assertion failure (such as "Assertion failed").
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auto message = js_string(vm(), "Assertion failed");
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// NOTE: Assemble `data` from the function arguments.
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Vector<JS::Value> data;
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if (vm().argument_count() > 1) {
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data.ensure_capacity(vm().argument_count() - 1);
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for (size_t i = 1; i < vm().argument_count(); ++i) {
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data.append(vm().argument(i));
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}
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}
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// 3. If data is empty, append message to data.
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if (data.is_empty()) {
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data.append(message);
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}
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// 4. Otherwise:
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else {
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// 1. Let first be data[0].
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auto& first = data[0];
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// 2. If Type(first) is not String, then prepend message to data.
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if (!first.is_string()) {
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data.prepend(message);
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}
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// 3. Otherwise:
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else {
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// 1. Let concat be the concatenation of message, U+003A (:), U+0020 SPACE, and first.
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auto concat = js_string(vm(), String::formatted("{}: {}", message->string(), first.to_string(global_object()).value()));
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// 2. Set data[0] to concat.
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data[0] = concat;
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}
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}
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// 5. Perform Logger("assert", data).
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if (m_client)
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return m_client->assert_();
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TRY(m_client->logger(LogLevel::Assert, data));
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return js_undefined();
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}
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