Adding test code for Stream::readBytesUntil()

Author: aentinger

test/CMakeLists.txt

@@ -53,6 +53,7 @@ set(TEST_SRCS
   src/Stream/test_parseFloat.cpp
   src/Stream/test_parseInt.cpp
   src/Stream/test_readBytes.cpp
+  src/Stream/test_readBytesUntil.cpp
   src/Stream/test_readString.cpp
   src/Stream/test_readStringUntil.cpp
   src/Stream/test_setTimeout.cpp

test/src/Stream/test_readBytesUntil.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <StreamMock.h>
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Testing readBytesUntil(char terminator, char *buffer, size_t length)", "[Stream-readBytesUntil-01]")
+{
+  StreamMock mock;
+
+  WHEN ("the stream is empty")
+  {
+    char buf[32] = {0};
+
+    REQUIRE(mock.readBytesUntil(' ', buf, sizeof(buf)) == 0);
+  }
+
+  WHEN ("the stream contains the termination character")
+  {
+    char buf[32] = {0};
+    char const str[] = "some stream content";
+    char const EXPECTED_STR[] = "some";
+    mock << str;
+
+    REQUIRE(mock.readBytesUntil(' ', buf, sizeof(buf)) == strlen("some"));
+    REQUIRE(strncmp(buf, EXPECTED_STR, sizeof(buf)) == 0);
+    REQUIRE(mock.readString() == arduino::String("stream content"));
+  }
+
+  WHEN ("the stream does not contain the termination character")
+  {
+    char buf[32] = {0};
+    char const STR[] = "some stream content";
+    mock << STR;
+
+    REQUIRE(mock.readBytesUntil('!', buf, sizeof(buf)) == strlen(STR));
+    REQUIRE(strncmp(buf, STR, sizeof(buf)) == 0);
+    REQUIRE(mock.readString() == arduino::String(""));
+  }
+}