Renamed JsonBuffer to MemoryPool

test/DynamicMemoryPool/startString.cpp

@@ -0,0 +1,49 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson/Memory/DynamicMemoryPool.hpp>
+#include <catch.hpp>
+
+using namespace ArduinoJson::Internals;
+
+TEST_CASE("DynamicMemoryPool::startString()") {
+  SECTION("WorksWhenBufferIsBigEnough") {
+    DynamicMemoryPool memoryPool(6);
+
+    DynamicMemoryPool::String str = memoryPool.startString();
+    str.append('h');
+    str.append('e');
+    str.append('l');
+    str.append('l');
+    str.append('o');
+
+    REQUIRE(std::string("hello") == str.c_str());
+  }
+
+  SECTION("GrowsWhenBufferIsTooSmall") {
+    DynamicMemoryPool memoryPool(5);
+
+    DynamicMemoryPool::String str = memoryPool.startString();
+    str.append('h');
+    str.append('e');
+    str.append('l');
+    str.append('l');
+    str.append('o');
+
+    REQUIRE(std::string("hello") == str.c_str());
+  }
+
+  SECTION("SizeIncreases") {
+    DynamicMemoryPool memoryPool(5);
+
+    DynamicMemoryPool::String str = memoryPool.startString();
+    REQUIRE(0 == memoryPool.size());
+
+    str.append('h');
+    REQUIRE(1 == memoryPool.size());
+
+    str.c_str();
+    REQUIRE(2 == memoryPool.size());
+  }
+}