Add a function in NetworkCommon parseHeaderList which parses a header list as a string into a vector of header pairs (#2623)

tests/src/NetworkCommon.cpp

@@ -0,0 +1,59 @@
+#include "common/NetworkCommon.hpp"
+
+#include <gtest/gtest.h>
+
+using namespace chatterino;
+
+TEST(NetworkCommon, parseHeaderList1)
+{
+    const QString input = "Authorization:secretKey;NextHeader:boo";
+    const std::vector<std::pair<QByteArray, QByteArray>> expected = {
+        {"Authorization", "secretKey"},
+        {"NextHeader", "boo"},
+    };
+
+    const auto actual = parseHeaderList(input);
+
+    ASSERT_EQ(expected, actual);
+}
+
+TEST(NetworkCommon, parseHeaderListTrimmed)
+{
+    const QString input = "Authorization:  secretKey; NextHeader   :boo";
+    const std::vector<std::pair<QByteArray, QByteArray>> expected = {
+        {"Authorization", "secretKey"},
+        {"NextHeader", "boo"},
+    };
+
+    const auto actual = parseHeaderList(input);
+
+    ASSERT_EQ(expected, actual);
+}
+
+TEST(NetworkCommon, parseHeaderListColonInValue)
+{
+    // The input values first header pair contains an invalid value, too many colons. We expect this value to be skipped
+    const QString input = "Authorization:  secretKey:hehe; NextHeader   :boo";
+    const std::vector<std::pair<QByteArray, QByteArray>> expected = {
+        {"Authorization", "secretKey:hehe"},
+        {"NextHeader", "boo"},
+    };
+
+    const auto actual = parseHeaderList(input);
+
+    ASSERT_EQ(expected, actual);
+}
+
+TEST(NetworkCommon, parseHeaderListBadPair)
+{
+    // The input values first header pair doesn't have a colon, so we don't know where the header name and value start/end
+    const QString input = "Authorization  secretKeybad; NextHeader   :boo";
+    const std::vector<std::pair<QByteArray, QByteArray>> expected = {
+        {"NextHeader", "boo"},
+    };
+
+    const auto actual = parseHeaderList(input);
+
+    ASSERT_EQ(expected, actual);
+    ASSERT_EQ(1, actual.size());
+}