Dynamic property (#749)

* Add DynamicProperty class

* Add tests for DynamicProperty

1 files changed, 169 insertions, 0 deletions

diff --git a/test/test-core.js b/test/test-core.js
new file mode 100644
index 00000000..d4a880d1
--- /dev/null
+++ b/test/test-core.js
@@ -0,0 +1,169 @@
+/*
+ * 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 crypto = require('crypto');
+const {VM} = require('./yomichan-vm');
+
+const vm = new VM({
+    crypto: {
+        getRandomValues: (array) => {
+            const buffer = crypto.randomBytes(array.byteLength);
+            buffer.copy(array);
+            return array;
+        }
+    }
+});
+vm.execute([
+    'mixed/js/core.js'
+]);
+const [DynamicProperty] = vm.get(['DynamicProperty']);
+
+
+function testDynamicProperty() {
+    const data = [
+        {
+            initialValue: 0,
+            operations: [
+                {
+                    operation: null,
+                    expectedDefaultValue: 0,
+                    expectedValue: 0,
+                    expectedOverrideCount: 0,
+                    expeectedEventOccurred: false
+                },
+                {
+                    operation: 'set.defaultValue',
+                    args: [1],
+                    expectedDefaultValue: 1,
+                    expectedValue: 1,
+                    expectedOverrideCount: 0,
+                    expeectedEventOccurred: true
+                },
+                {
+                    operation: 'set.defaultValue',
+                    args: [1],
+                    expectedDefaultValue: 1,
+                    expectedValue: 1,
+                    expectedOverrideCount: 0,
+                    expeectedEventOccurred: false
+                },
+                {
+                    operation: 'set.defaultValue',
+                    args: [0],
+                    expectedDefaultValue: 0,
+                    expectedValue: 0,
+                    expectedOverrideCount: 0,
+                    expeectedEventOccurred: true
+                },
+                {
+                    operation: 'setOverride',
+                    args: [8],
+                    expectedDefaultValue: 0,
+                    expectedValue: 8,
+                    expectedOverrideCount: 1,
+                    expeectedEventOccurred: true
+                },
+                {
+                    operation: 'setOverride',
+                    args: [16],
+                    expectedDefaultValue: 0,
+                    expectedValue: 8,
+                    expectedOverrideCount: 2,
+                    expeectedEventOccurred: false
+                },
+                {
+                    operation: 'setOverride',
+                    args: [32, 1],
+                    expectedDefaultValue: 0,
+                    expectedValue: 32,
+                    expectedOverrideCount: 3,
+                    expeectedEventOccurred: true
+                },
+                {
+                    operation: 'setOverride',
+                    args: [64, -1],
+                    expectedDefaultValue: 0,
+                    expectedValue: 32,
+                    expectedOverrideCount: 4,
+                    expeectedEventOccurred: false
+                },
+                {
+                    operation: 'clearOverride',
+                    args: [-4],
+                    expectedDefaultValue: 0,
+                    expectedValue: 32,
+                    expectedOverrideCount: 3,
+                    expeectedEventOccurred: false
+                },
+                {
+                    operation: 'clearOverride',
+                    args: [-3],
+                    expectedDefaultValue: 0,
+                    expectedValue: 32,
+                    expectedOverrideCount: 2,
+                    expeectedEventOccurred: false
+                },
+                {
+                    operation: 'clearOverride',
+                    args: [-2],
+                    expectedDefaultValue: 0,
+                    expectedValue: 64,
+                    expectedOverrideCount: 1,
+                    expeectedEventOccurred: true
+                },
+                {
+                    operation: 'clearOverride',
+                    args: [-1],
+                    expectedDefaultValue: 0,
+                    expectedValue: 0,
+                    expectedOverrideCount: 0,
+                    expeectedEventOccurred: true
+                }
+            ]
+        }
+    ];
+
+    for (const {initialValue, operations} of data) {
+        const property = new DynamicProperty(initialValue);
+        const overrideTokens = [];
+        let eventOccurred = false;
+        const onChange = () => { eventOccurred = true; };
+        property.on('change', onChange);
+        for (const {operation, args, expectedDefaultValue, expectedValue, expectedOverrideCount, expeectedEventOccurred} of operations) {
+            eventOccurred = false;
+            switch (operation) {
+                case 'set.defaultValue': property.defaultValue = args[0]; break;
+                case 'setOverride': overrideTokens.push(property.setOverride(...args)); break;
+                case 'clearOverride': property.clearOverride(overrideTokens[overrideTokens.length + args[0]]); break;
+            }
+            assert.strictEqual(eventOccurred, expeectedEventOccurred);
+            assert.strictEqual(property.defaultValue, expectedDefaultValue);
+            assert.strictEqual(property.value, expectedValue);
+            assert.strictEqual(property.overrideCount, expectedOverrideCount);
+        }
+        property.off('change', onChange);
+    }
+}
+
+
+function main() {
+    testDynamicProperty();
+}
+
+
+if (require.main === module) { main(); }