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lib/ArduinoStreamUtils/extras/test/StringStreamTest.cpp

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+// StreamUtils - github.com/bblanchon/ArduinoStreamUtils
+// Copyright Benoit Blanchon 2019-2021
+// MIT License
+
+#include "StreamUtils/Streams/StringStream.hpp"
+
+#include "doctest.h"
+
+using namespace StreamUtils;
+
+TEST_CASE("StringStream") {
+  WHEN("Constructed with no argument") {
+    StringStream s;
+
+    THEN("str() return an empty String") {
+      CHECK(s.str() == "");
+    }
+
+    THEN("write(uint8_t) appends the string") {
+      s.write('A');
+      s.write('B');
+      CHECK(s.str() == "AB");
+    }
+
+    THEN("write(uint8_t) return 1") {
+      CHECK(s.write('A') == 1);
+      CHECK(s.write('B') == 1);
+    }
+
+    THEN("write(0) return 0") {
+      CHECK(s.write(0) == 0);
+    }
+
+    THEN("write(uint8_t*, size_t) appends the string") {
+      s.write(reinterpret_cast<const uint8_t*>("ABXXX"), 2);
+      s.write(reinterpret_cast<const uint8_t*>("CDEXX"), 3);
+      CHECK(s.str() == "ABCDE");
+    }
+
+    THEN("write(uint8_t*, size_t) return number of chars written") {
+      uint8_t dummy[32] = {1, 2, 3, 0, 5, 6};
+      CHECK(s.write(dummy, 2) == 2);
+      CHECK(s.write(dummy, 3) == 3);
+      CHECK(s.write(dummy, 4) == 3);
+    }
+
+    THEN("str(String) sets the string") {
+      s.str("world!");
+      CHECK(s.str() == "world!");
+    }
+
+    THEN("available() returns 0") {
+      CHECK(s.available() == 0);
+    }
+
+    THEN("peek() return -1") {
+      CHECK(s.peek() == -1);
+    }
+
+    THEN("peek() return -1") {
+      CHECK(s.read() == -1);
+    }
+  }
+
+  WHEN("Constructed with string") {
+    StringStream s("hello");
+
+    THEN("str() returns the string passed to contructor") {
+      CHECK(s.str() == "hello");
+    }
+
+    THEN("available() returns the length passed to the constructor") {
+      CHECK(s.available() == 5);
+    }
+
+    THEN("write(uint8_t) appends the string") {
+      s.write('A');
+      s.write('B');
+      CHECK(s.str() == "helloAB");
+    }
+
+    THEN("write(uint8_t*, size_t) appends the string") {
+      s.write(reinterpret_cast<const uint8_t*>("ABXXX"), 2);
+      s.write(reinterpret_cast<const uint8_t*>("CDEXX"), 3);
+      CHECK(s.str() == "helloABCDE");
+    }
+
+    THEN("str(String) replaces the string") {
+      s.str("world!");
+      CHECK(s.str() == "world!");
+    }
+
+    THEN("peek() return the first char") {
+      CHECK(s.peek() == 'h');
+    }
+
+    THEN("peek() return the next char") {
+      CHECK(s.read() == 'h');
+      CHECK(s.read() == 'e');
+    }
+
+    THEN("readBytes() can return the begining of the string") {
+      char buffer[32] = {0};
+      CHECK(s.readBytes(buffer, 3) == 3);
+      CHECK(buffer == std::string("hel"));
+      CHECK(s.available() == 2);
+    }
+
+    THEN("readBytes() can return the whole string") {
+      char buffer[32] = {0};
+      CHECK(s.readBytes(buffer, 32) == 5);
+      CHECK(buffer == std::string("hello"));
+      CHECK(s.available() == 0);
+    }
+  }
+}