1 files changed, 68 insertions, 0 deletions
diff --git a/AK/Tests/TestFormat.cpp b/AK/Tests/TestFormat.cpp
new file mode 100644
index 0000000000..90d682e9db
--- /dev/null
+++ b/AK/Tests/TestFormat.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/TestSuite.h>
+
+#include <AK/Format.h>
+
+TEST_CASE(format_string_literals)
+{
+    EXPECT_EQ(AK::format("prefix-{}-suffix", "abc"), "prefix-abc-suffix");
+    EXPECT_EQ(AK::format("{}{}{}", "a", "b", "c"), "abc");
+}
+
+TEST_CASE(format_integers)
+{
+    EXPECT_EQ(AK::format("{}", 42u), "42");
+    EXPECT_EQ(AK::format("{:4}", 42u), "  42");
+    EXPECT_EQ(AK::format("{:08}", 42u), "00000042");
+    // EXPECT_EQ(AK::format("{:7}", -17), "    -17");
+    EXPECT_EQ(AK::format("{}", -17), "-17");
+    EXPECT_EQ(AK::format("{:04}", 13), "0013");
+    EXPECT_EQ(AK::format("{:08x}", 4096), "00001000");
+    // EXPECT_EQ(AK::format("{}", 0x1111222233334444ull), "1111222233334444");
+}
+
+TEST_CASE(reorder_format_arguments)
+{
+    EXPECT_EQ(AK::format("{1}{0}", "a", "b"), "ba");
+    EXPECT_EQ(AK::format("{0}{1}", "a", "b"), "ab");
+    EXPECT_EQ(AK::format("{0}{0}{0}", "a", "b"), "aaa");
+    EXPECT_EQ(AK::format("{1}{}{0}", "a", "b", "c"), "baa");
+}
+
+TEST_CASE(escape_braces)
+{
+    EXPECT_EQ(AK::format("{{{}", "foo"), "{foo");
+    EXPECT_EQ(AK::format("{}}}", "bar"), "bar}");
+}
+
+TEST_CASE(everything)
+{
+    EXPECT_EQ(AK::format("{{{:04}/{}/{0:8}/{1}", 42u, "foo"), "{0042/foo/      42/foo");
+}
+
+TEST_MAIN(Format)