test: Add test case for `ReplaceAll()` function

src/test/util_tests.cpp

@@ -249,6 +249,22 @@ BOOST_AUTO_TEST_CASE(util_Join)
     BOOST_CHECK_EQUAL(Join<std::string>({"foo", "bar"}, ", ", op_upper), "FOO, BAR");
 }
 
+BOOST_AUTO_TEST_CASE(util_ReplaceAll)
+{
+    const std::string original("A test \"%s\" string '%s'.");
+    auto test_replaceall = [&original](const std::string& search, const std::string& substitute, const std::string& expected) {
+        auto test = original;
+        ReplaceAll(test, search, substitute);
+        BOOST_CHECK_EQUAL(test, expected);
+    };
+
+    test_replaceall("", "foo", original);
+    test_replaceall(original, "foo", "foo");
+    test_replaceall("%s", "foo", "A test \"foo\" string 'foo'.");
+    test_replaceall("\"", "foo", "A test foo%sfoo string '%s'.");
+    test_replaceall("'", "foo", "A test \"%s\" string foo%sfoo.");
+}
+
 BOOST_AUTO_TEST_CASE(util_TrimString)
 {
     BOOST_CHECK_EQUAL(TrimString(" foo bar "), "foo bar");