AK: Add a FixedArray<T> container

This is a simple array wrapper that knows its size. It has begin/end
so you can use range-for. It also has a resize() that reallocates.

1 files changed, 55 insertions, 0 deletions

diff --git a/AK/Tests/TestFixedArray.cpp b/AK/Tests/TestFixedArray.cpp
new file mode 100644
index 0000000000..92fe01b24c
--- /dev/null
+++ b/AK/Tests/TestFixedArray.cpp
@@ -0,0 +1,55 @@
+#include <AK/TestSuite.h>
+
+#include <AK/AKString.h>
+#include <AK/FixedArray.h>
+
+TEST_CASE(construct)
+{
+    EXPECT(FixedArray<int>().size() == 0);
+}
+
+TEST_CASE(ints)
+{
+    FixedArray<int> ints(3);
+    ints[0] = 0;
+    ints[1] = 1;
+    ints[2] = 2;
+    EXPECT_EQ(ints[0], 0);
+    EXPECT_EQ(ints[1], 1);
+    EXPECT_EQ(ints[2], 2);
+
+    ints.clear();
+    EXPECT_EQ(ints.size(), 0u);
+}
+
+TEST_CASE(resize)
+{
+    FixedArray<String> strings(2);
+    strings[0] = "ABC";
+    strings[1] = "DEF";
+
+    EXPECT_EQ(strings.size(), 2u);
+    EXPECT_EQ(strings[0], "ABC");
+    EXPECT_EQ(strings[1], "DEF");
+
+    strings.resize(4);
+
+    EXPECT_EQ(strings.size(), 4u);
+    EXPECT_EQ(strings[0], "ABC");
+    EXPECT_EQ(strings[1], "DEF");
+
+    EXPECT_EQ(strings[2].is_null(), true);
+    EXPECT_EQ(strings[3].is_null(), true);
+
+    strings[2] = "GHI";
+    strings[3] = "JKL";
+
+    EXPECT_EQ(strings[2], "GHI");
+    EXPECT_EQ(strings[3], "JKL");
+
+    strings.resize(1);
+    EXPECT_EQ(strings.size(), 1u);
+    EXPECT_EQ(strings[0], "ABC");
+}
+
+TEST_MAIN(FixedArray)