Added tests fo JsonVariant::printTo()

test/JsonVariant_PrintTo_Tests.cpp

@@ -0,0 +1,72 @@
+// Copyright Benoit Blanchon 2014
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+
+#include <gtest/gtest.h>
+#include <ArduinoJson.h>
+
+class JsonVariant_PrintTo_Tests : public testing::Test {
+ protected:
+  JsonVariant variant;
+
+  void outputMustBe(const char *expected) {
+    char buffer[256] = "";
+    size_t n = variant.printTo(buffer, sizeof(buffer));
+    EXPECT_STREQ(expected, buffer);
+    EXPECT_EQ(strlen(expected), n);
+  }
+};
+
+TEST_F(JsonVariant_PrintTo_Tests, Empty) { outputMustBe(""); }
+
+TEST_F(JsonVariant_PrintTo_Tests, Null) {
+  variant = static_cast<char *>(0);
+  outputMustBe("null");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, String) {
+  variant = "hello";
+  outputMustBe("\"hello\"");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, DoubleZero) {
+  variant = 0.0;
+  outputMustBe("0.0");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, DoubleDefaultDigits) {
+  variant = 3.14159265358979323846;
+  outputMustBe("3.14");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, DoubleFourDigits) {
+  variant.set(3.14159265358979323846, 4);
+  outputMustBe("3.1416");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, Integer) {
+  variant = 42;
+  outputMustBe("42");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, Long) {
+  variant = 42L;
+  outputMustBe("42");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, Char) {
+  variant = '*';
+  outputMustBe("42");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, True) {
+  variant = true;
+  outputMustBe("true");
+}
+
+TEST_F(JsonVariant_PrintTo_Tests, OneFalse) {
+  variant = false;
+  outputMustBe("false");
+}