Decode escaped Unicode characters like \u00DE (issue #304, PR #791)

test/JsonDeserializer/deserializeJsonString.cpp

@@ -0,0 +1,66 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#define ARDUINOJSON_DECODE_UNICODE 1
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+using namespace Catch::Matchers;
+
+TEST_CASE("Valid JSON strings value") {
+  struct TestCase {
+    const char* input;
+    const char* expectedOutput;
+  };
+
+  TestCase testCases[] = {
+      {"\"hello world\"", "hello world"},
+      {"\'hello world\'", "hello world"},
+      {"\"1\\\"2\\\\3\\/4\\b5\\f6\\n7\\r8\\t9\"", "1\"2\\3/4\b5\f6\n7\r8\t9"},
+      {"'\\u0041'", "A"},
+      {"'\\u00e4'", "\xc3\xa4"},      // ä
+      {"'\\u00E4'", "\xc3\xa4"},      // ä
+      {"'\\u3042'", "\xe3\x81\x82"},  // あ
+
+  };
+  const size_t testCount = sizeof(testCases) / sizeof(testCases[0]);
+
+  DynamicJsonDocument doc(4096);
+
+  for (size_t i = 0; i < testCount; i++) {
+    const TestCase& testCase = testCases[i];
+    CAPTURE(testCase.input);
+    DeserializationError err = deserializeJson(doc, testCase.input);
+    REQUIRE(err == DeserializationError::Ok);
+    REQUIRE(doc.as<std::string>() == testCase.expectedOutput);
+  }
+}
+
+TEST_CASE("Truncated JSON string") {
+  const char* testCases[] = {"\"hello", "\'hello", "'\\u", "'\\u00", "'\\u000"};
+  const size_t testCount = sizeof(testCases) / sizeof(testCases[0]);
+
+  DynamicJsonDocument doc(4096);
+
+  for (size_t i = 0; i < testCount; i++) {
+    const char* input = testCases[i];
+    CAPTURE(input);
+    REQUIRE(deserializeJson(doc, input) ==
+            DeserializationError::IncompleteInput);
+  }
+}
+
+TEST_CASE("Invalid JSON string") {
+  const char* testCases[] = {"'\\u'",     "'\\u000g'", "'\\u000'",
+                             "'\\u000G'", "'\\u000/'", "\\x1234"};
+  const size_t testCount = sizeof(testCases) / sizeof(testCases[0]);
+
+  DynamicJsonDocument doc(4096);
+
+  for (size_t i = 0; i < testCount; i++) {
+    const char* input = testCases[i];
+    CAPTURE(input);
+    REQUIRE(deserializeJson(doc, input) == DeserializationError::InvalidInput);
+  }
+}