initial commit

lib_standalone/ArduinoJson/extras/tests/Misc/StringWriter.cpp

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+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#define ARDUINOJSON_ENABLE_ARDUINO_STRING 1
+#define ARDUINOJSON_STRING_BUFFER_SIZE 5
+#include <ArduinoJson.h>
+#include <catch.hpp>
+#include "custom_string.hpp"
+
+using namespace ARDUINOJSON_NAMESPACE;
+
+template <typename StringWriter>
+static size_t print(StringWriter& sb, const char* s) {
+  return sb.write(reinterpret_cast<const uint8_t*>(s), strlen(s));
+}
+
+template <typename StringWriter, typename String>
+void common_tests(StringWriter& sb, const String& output) {
+  SECTION("InitialState") {
+    REQUIRE(std::string("") == output);
+  }
+
+  SECTION("EmptyString") {
+    REQUIRE(0 == print(sb, ""));
+    REQUIRE(std::string("") == output);
+  }
+
+  SECTION("OneString") {
+    REQUIRE(4 == print(sb, "ABCD"));
+    REQUIRE(std::string("ABCD") == output);
+  }
+
+  SECTION("TwoStrings") {
+    REQUIRE(4 == print(sb, "ABCD"));
+    REQUIRE(4 == print(sb, "EFGH"));
+    REQUIRE(std::string("ABCDEFGH") == output);
+  }
+}
+
+TEST_CASE("StaticStringWriter") {
+  char output[20];
+  StaticStringWriter sb(output, sizeof(output));
+
+  common_tests(sb, static_cast<const char*>(output));
+
+  SECTION("OverCapacity") {
+    REQUIRE(19 == print(sb, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"));
+    REQUIRE(0 == print(sb, "ABC"));
+    REQUIRE(std::string("ABCDEFGHIJKLMNOPQRS") == output);
+  }
+}
+
+TEST_CASE("Writer<std::string>") {
+  std::string output;
+  Writer<std::string> sb(output);
+  common_tests(sb, output);
+}
+
+TEST_CASE("Writer<String>") {
+  ::String output;
+  Writer< ::String> sb(output);
+
+  common_tests(sb, output);
+
+  SECTION("Writes characters to temporary buffer") {
+    // accumulate in buffer
+    sb.write('a');
+    sb.write('b');
+    sb.write('c');
+    REQUIRE(output == "");
+
+    // flush when full
+    sb.write('d');
+    REQUIRE(output == "abcd");
+
+    // flush on destruction
+    sb.write('e');
+    sb.~Writer();
+    REQUIRE(output == "abcde");
+  }
+
+  SECTION("Writes strings to temporary buffer") {
+    // accumulate in buffer
+    print(sb, "abc");
+    REQUIRE(output == "");
+
+    // flush when full, and continue to accumulate
+    print(sb, "de");
+    REQUIRE(output == "abcd");
+
+    // flush on destruction
+    sb.~Writer();
+    REQUIRE(output == "abcde");
+  }
+}
+
+TEST_CASE("Writer<custom_string>") {
+  custom_string output;
+  Writer<custom_string> sb(output);
+
+  REQUIRE(4 == print(sb, "ABCD"));
+  REQUIRE("ABCD" == output);
+}
+
+TEST_CASE("IsWriteableString") {
+  SECTION("std::string") {
+    REQUIRE(IsWriteableString<std::string>::value == true);
+  }
+
+  SECTION("custom_string") {
+    REQUIRE(IsWriteableString<custom_string>::value == true);
+  }
+
+  SECTION("basic_string<wchar_t>") {
+    REQUIRE(IsWriteableString<std::basic_string<wchar_t> >::value == false);
+  }
+}