CacheMap (#715)

* Create CacheMap class

* Add test

1 files changed, 168 insertions, 0 deletions

diff --git a/test/test-cache-map.js b/test/test-cache-map.js
new file mode 100644
index 00000000..00383e65
--- /dev/null
+++ b/test/test-cache-map.js
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2020  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const assert = require('assert');
+const {VM} = require('./yomichan-vm');
+
+const vm = new VM({console});
+vm.execute([
+    'mixed/js/cache-map.js'
+]);
+const CacheMap = vm.get('CacheMap');
+
+
+function testConstructor() {
+    const data = [
+        [false, () => new CacheMap(0, () => null)],
+        [false, () => new CacheMap(1, () => null)],
+        [false, () => new CacheMap(Number.MAX_VALUE, () => null)],
+        [true,  () => new CacheMap(-1, () => null)],
+        [true,  () => new CacheMap(1.5, () => null)],
+        [true,  () => new CacheMap(Number.NaN, () => null)],
+        [true,  () => new CacheMap(Number.POSITIVE_INFINITY, () => null)],
+        [true,  () => new CacheMap('a', () => null)]
+    ];
+
+    for (const [throws, create] of data) {
+        if (throws) {
+            assert.throws(create);
+        } else {
+            assert.doesNotThrow(create);
+        }
+    }
+}
+
+function testApi() {
+    const data = [
+        {
+            maxCount: 1,
+            expectedCount: 0,
+            calls: []
+        },
+        {
+            maxCount: 1,
+            expectedCount: 1,
+            calls: [
+                ['get', 'a', 'b', 'c']
+            ]
+        },
+        {
+            maxCount: 10,
+            expectedCount: 1,
+            calls: [
+                ['get', 'a', 'b', 'c'],
+                ['get', 'a', 'b', 'c'],
+                ['get', 'a', 'b', 'c']
+            ]
+        },
+        {
+            maxCount: 10,
+            expectedCount: 3,
+            calls: [
+                ['get', 'a1', 'b', 'c'],
+                ['get', 'a2', 'b', 'c'],
+                ['get', 'a3', 'b', 'c']
+            ]
+        },
+        {
+            maxCount: 10,
+            expectedCount: 3,
+            calls: [
+                ['get', 'a', 'b1', 'c'],
+                ['get', 'a', 'b2', 'c'],
+                ['get', 'a', 'b3', 'c']
+            ]
+        },
+        {
+            maxCount: 10,
+            expectedCount: 3,
+            calls: [
+                ['get', 'a', 'b', 'c1'],
+                ['get', 'a', 'b', 'c2'],
+                ['get', 'a', 'b', 'c3']
+            ]
+        },
+        {
+            maxCount: 1,
+            expectedCount: 1,
+            calls: [
+                ['get', 'a1', 'b', 'c'],
+                ['get', 'a2', 'b', 'c'],
+                ['get', 'a3', 'b', 'c']
+            ]
+        },
+        {
+            maxCount: 1,
+            expectedCount: 1,
+            calls: [
+                ['get', 'a', 'b1', 'c'],
+                ['get', 'a', 'b2', 'c'],
+                ['get', 'a', 'b3', 'c']
+            ]
+        },
+        {
+            maxCount: 1,
+            expectedCount: 1,
+            calls: [
+                ['get', 'a', 'b', 'c1'],
+                ['get', 'a', 'b', 'c2'],
+                ['get', 'a', 'b', 'c3']
+            ]
+        },
+        {
+            maxCount: 10,
+            expectedCount: 0,
+            calls: [
+                ['get', 'a', 'b', 'c1'],
+                ['get', 'a', 'b', 'c2'],
+                ['get', 'a', 'b', 'c3'],
+                ['clear']
+            ]
+        },
+        {
+            maxCount: 0,
+            expectedCount: 0,
+            calls: [
+                ['get', 'a1', 'b', 'c'],
+                ['get', 'a', 'b2', 'c'],
+                ['get', 'a', 'b', 'c3']
+            ]
+        }
+    ];
+
+    const create = (...args) => args.join(',');
+    for (const {maxCount, expectedCount, calls} of data) {
+        const cache = new CacheMap(maxCount, create);
+        assert.strictEqual(cache.maxCount, maxCount);
+        for (const [name, ...args] of calls) {
+            switch (name) {
+                case 'get': cache.get(...args); break;
+                case 'clear': cache.clear(); break;
+            }
+        }
+        assert.strictEqual(cache.count, expectedCount);
+    }
+}
+
+
+function main() {
+    testConstructor();
+    testApi();
+}
+
+
+if (require.main === module) { main(); }