tests: Move CaseInsensitiveEqual to test/util/str

src/test/util/str.cpp

@@ -0,0 +1,21 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <test/util/str.h>
+
+#include <cstdint>
+#include <string>
+
+bool CaseInsensitiveEqual(const std::string& s1, const std::string& s2)
+{
+    if (s1.size() != s2.size()) return false;
+    for (size_t i = 0; i < s1.size(); ++i) {
+        char c1 = s1[i];
+        if (c1 >= 'A' && c1 <= 'Z') c1 -= ('A' - 'a');
+        char c2 = s2[i];
+        if (c2 >= 'A' && c2 <= 'Z') c2 -= ('A' - 'a');
+        if (c1 != c2) return false;
+    }
+    return true;
+}

src/test/util/str.h

@@ -0,0 +1,12 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_TEST_UTIL_STR_H
+#define BITCOIN_TEST_UTIL_STR_H
+
+#include <string>
+
+bool CaseInsensitiveEqual(const std::string& s1, const std::string& s2);
+
+#endif // BITCOIN_TEST_UTIL_STR_H