1 files changed, 131 insertions, 0 deletions
diff --git a/libs/ftl/small_map_test.cpp b/libs/ftl/small_map_test.cpp
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+++ b/libs/ftl/small_map_test.cpp
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+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ftl/small_map.h>
+#include <gtest/gtest.h>
+
+#include <cctype>
+
+namespace android::test {
+
+using ftl::SmallMap;
+
+// Keep in sync with example usage in header file.
+TEST(SmallMap, Example) {
+  ftl::SmallMap<int, std::string, 3> map;
+  EXPECT_TRUE(map.empty());
+  EXPECT_FALSE(map.dynamic());
+
+  map = ftl::init::map<int, std::string>(123, "abc")(-1)(42, 3u, '?');
+  EXPECT_EQ(map.size(), 3u);
+  EXPECT_FALSE(map.dynamic());
+
+  EXPECT_TRUE(map.contains(123));
+
+  EXPECT_EQ(map.find(42, [](const std::string& s) { return s.size(); }), 3u);
+
+  const auto opt = map.find(-1);
+  ASSERT_TRUE(opt);
+
+  std::string& ref = *opt;
+  EXPECT_TRUE(ref.empty());
+  ref = "xyz";
+
+  EXPECT_EQ(map, SmallMap(ftl::init::map(-1, "xyz")(42, "???")(123, "abc")));
+}
+
+TEST(SmallMap, Construct) {
+  {
+    // Default constructor.
+    SmallMap<int, std::string, 2> map;
+
+    EXPECT_TRUE(map.empty());
+    EXPECT_FALSE(map.dynamic());
+  }
+  {
+    // In-place constructor with same types.
+    SmallMap<int, std::string, 5> map =
+        ftl::init::map<int, std::string>(123, "abc")(456, "def")(789, "ghi");
+
+    EXPECT_EQ(map.size(), 3u);
+    EXPECT_EQ(map.max_size(), 5u);
+    EXPECT_FALSE(map.dynamic());
+
+    EXPECT_EQ(map, SmallMap(ftl::init::map(123, "abc")(456, "def")(789, "ghi")));
+  }
+  {
+    // In-place constructor with different types.
+    SmallMap<int, std::string, 5> map =
+        ftl::init::map<int, std::string>(123, "abc")(-1)(42, 3u, '?');
+
+    EXPECT_EQ(map.size(), 3u);
+    EXPECT_EQ(map.max_size(), 5u);
+    EXPECT_FALSE(map.dynamic());
+
+    EXPECT_EQ(map, SmallMap(ftl::init::map(42, "???")(123, "abc")(-1, "\0\0\0")));
+  }
+  {
+    // In-place constructor with implicit size.
+    SmallMap map = ftl::init::map<int, std::string>(123, "abc")(-1)(42, 3u, '?');
+
+    static_assert(std::is_same_v<decltype(map), SmallMap<int, std::string, 3>>);
+    EXPECT_EQ(map.size(), 3u);
+    EXPECT_EQ(map.max_size(), 3u);
+    EXPECT_FALSE(map.dynamic());
+
+    EXPECT_EQ(map, SmallMap(ftl::init::map(-1, "\0\0\0")(42, "???")(123, "abc")));
+  }
+}
+
+TEST(SmallMap, Find) {
+  {
+    // Constant reference.
+    const ftl::SmallMap map = ftl::init::map('a', 'A')('b', 'B')('c', 'C');
+
+    const auto opt = map.find('b');
+    EXPECT_EQ(opt, 'B');
+
+    const char d = 'D';
+    const auto ref = map.find('d').value_or(std::cref(d));
+    EXPECT_EQ(ref.get(), 'D');
+  }
+  {
+    // Mutable reference.
+    ftl::SmallMap map = ftl::init::map('a', 'A')('b', 'B')('c', 'C');
+
+    const auto opt = map.find('c');
+    EXPECT_EQ(opt, 'C');
+
+    char d = 'd';
+    const auto ref = map.find('d').value_or(std::ref(d));
+    ref.get() = 'D';
+    EXPECT_EQ(d, 'D');
+  }
+  {
+    // Constant unary operation.
+    const ftl::SmallMap map = ftl::init::map('a', 'x')('b', 'y')('c', 'z');
+    EXPECT_EQ(map.find('c', [](char c) { return std::toupper(c); }), 'Z');
+  }
+  {
+    // Mutable unary operation.
+    ftl::SmallMap map = ftl::init::map('a', 'x')('b', 'y')('c', 'z');
+    EXPECT_TRUE(map.find('c', [](char& c) { c = std::toupper(c); }));
+
+    EXPECT_EQ(map, SmallMap(ftl::init::map('c', 'Z')('b', 'y')('a', 'x')));
+  }
+}
+
+}  // namespace android::test