Tests: Move AK tests to Tests/AK

Tests/AK/TestFind.cpp

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <AK/Array.h>
+#include <AK/Find.h>
+#include <AK/Vector.h>
+
+TEST_CASE(should_return_end_if_not_in_container)
+{
+    constexpr Array<int, 10> a {};
+
+    static_assert(a.end() == AK::find(a.begin(), a.end(), 1));
+
+    EXPECT(a.end() == AK::find(a.begin(), a.end(), 1));
+}
+
+TEST_CASE(should_return_iterator_to_first_matching_value_in_container)
+{
+    static constexpr Array<int, 10> a { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };
+
+    constexpr auto expected = a.begin() + 4;
+
+    static_assert(expected == AK::find(a.begin(), a.end(), 0));
+
+    EXPECT(expected == AK::find(a.begin(), a.end(), 0));
+}
+
+TEST_CASE(should_return_iterator_to_first_predicate_matching_value_in_container)
+{
+    static constexpr Array<int, 10> a { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };
+
+    constexpr auto expected = a.begin() + 4;
+
+    static_assert(expected == AK::find_if(a.begin(), a.end(), [](auto v) { return v == 0; }));
+
+    EXPECT(expected == AK::find_if(a.begin(), a.end(), [](auto v) { return v == 0; }));
+
+    auto find_me = 8;
+    EXPECT(find_me == *AK::find_if(a.begin(), a.end(), [&](auto v) { return v == find_me; }));
+}
+
+TEST_CASE(should_return_index_to_first_predicate_matching_value_in_container)
+{
+    static constexpr Array<int, 10> a { 1, 2, 3, 4, 0, 6, 7, 8, 0, 0 };
+
+    static_assert(4 == AK::find_index(a.begin(), a.end(), 0));
+
+    EXPECT(4 == AK::find_index(a.begin(), a.end(), 0));
+}