1 files changed, 93 insertions, 0 deletions
diff --git a/intl/icu_capi/cpp/examples/bidi/test.cpp b/intl/icu_capi/cpp/examples/bidi/test.cpp
new file mode 100644
index 0000000000..629cf752ce
--- /dev/null
+++ b/intl/icu_capi/cpp/examples/bidi/test.cpp
@@ -0,0 +1,93 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+#include "../../include/ICU4XDataProvider.hpp"
+#include "../../include/ICU4XBidi.hpp"
+#include "../../include/ICU4XLogger.hpp"
+
+#include <iostream>
+
+int main() {
+    ICU4XDataProvider dp = ICU4XDataProvider::create_compiled();
+    auto bidi = ICU4XBidi::create(dp).ok().value();
+
+    // Written char-by-char to avoid messing up certain text editors.
+    std::string_view str = 
+        "א"
+        "ב"
+        "ג"
+        "a"
+        "b"
+        "c"
+        "\n"
+        "a"
+        "b"
+        "c"
+        "א"
+        "ב"
+        "ג";
+
+    // reordered string is same for both lines
+    std::string_view reordered_expected =
+        "a"
+        "b"
+        "c"
+        "ג"
+        "ב"
+        "א";
+    auto bidi_info = bidi.for_text(str, ICU4XBidi::level_ltr());
+    auto n_para = bidi_info.paragraph_count();
+    if (n_para != 2) {
+        std::cout << "Expected 2 paragraphs, found " << n_para << std::endl;
+        return 1;
+    }
+
+    auto para = bidi_info.paragraph_at(0).value();
+
+    auto size = para.size();
+    if (size != 10) {
+        std::cout << "Expected paragraph of size 10, found " << size << std::endl;
+        return 1;
+    }
+
+    // The first paragraph's first strongly directional character is RTL
+    uint8_t level = para.level_at(0);
+    std::cout << "Level of first paragraph at index 0 is " << unsigned(level) << std::endl;
+    if (!ICU4XBidi::level_is_rtl(level)) {
+        std::cout << "Expected level at index 0 to be RTL" << std::endl;
+        return 1;
+    }
+
+
+    std::string reordered = para.reorder_line(0, 9).ok().value();
+    std::cout << "Reordered paragraph: " << reordered << std::endl;
+
+    if (reordered != reordered) {
+        std::cout << "Found incorrect reordering, expected: " << reordered << std::endl;
+    }
+
+    para.set_paragraph_in_text(1).ok().value();
+
+    size = para.size();
+    if (size != 9) {
+        std::cout << "Expected paragraph of size 9, found " << size << std::endl;
+        return 1;
+    }
+
+    // The second paragraph's first strongly directional character is LTR
+    level = para.level_at(0);
+    std::cout << "Level of second paragraph at index 0 is " << unsigned(level) << std::endl;
+    if (!ICU4XBidi::level_is_ltr(level)) {
+        std::cout << "Expected level at index 0 to be LTR" << std::endl;
+        return 1;
+    }
+    reordered = para.reorder_line(10, 19).ok().value();
+    std::cout << "Reordered paragraph: " << reordered << std::endl;
+
+    if (reordered != reordered) {
+        std::cout << "Found incorrect reordering, expected: " << reordered << std::endl;
+    }
+
+    return 0;
+}