test: add unit tests for logoconstants default values and exports (#5690)

Co-authored-by: Parth <dagia@Parths-MacBook-Pro.local>

Author: parthdagia05

js/__tests__/logoconstants.test.js

@@ -0,0 +1,111 @@
+/**
+ * @license
+ * MusicBlocks v3.4.1
+ * Copyright (C) 2026 Music Blocks Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+global._ = jest.fn(s => s);
+
+const constants = require("../logoconstants");
+
+describe("logoconstants", () => {
+    test("module loads and exports an object", () => {
+        expect(constants).toBeDefined();
+        expect(typeof constants).toBe("object");
+    });
+
+    test("numeric defaults have correct values", () => {
+        expect(constants.DEFAULTVOLUME).toBe(50);
+        expect(constants.PREVIEWVOLUME).toBe(80);
+        expect(constants.DEFAULTDELAY).toBe(500);
+        expect(constants.OSCVOLUMEADJUSTMENT).toBe(1.5);
+        expect(constants.TONEBPM).toBe(240);
+        expect(constants.TARGETBPM).toBe(90);
+        expect(constants.TURTLESTEP).toBe(-1);
+        expect(constants.NOTEDIV).toBe(8);
+    });
+
+    test("error message strings are non-empty strings", () => {
+        const msgKeys = [
+            "NOMICERRORMSG",
+            "NANERRORMSG",
+            "NOSTRINGERRORMSG",
+            "NOBOXERRORMSG",
+            "NOACTIONERRORMSG",
+            "NOINPUTERRORMSG",
+            "NOSQRTERRORMSG",
+            "ZERODIVIDEERRORMSG",
+            "EMPTYHEAPERRORMSG",
+            "POSNUMBER"
+        ];
+        for (const key of msgKeys) {
+            expect(typeof constants[key]).toBe("string");
+            expect(constants[key].length).toBeGreaterThan(0);
+        }
+    });
+
+    test("INVALIDPITCH has the expected translation string", () => {
+        expect(typeof constants.INVALIDPITCH).toBe("string");
+        expect(constants.INVALIDPITCH).toBe("Not a valid pitch name");
+    });
+
+    test("notation index constants are sequential integers starting at 0", () => {
+        expect(constants.NOTATIONNOTE).toBe(0);
+        expect(constants.NOTATIONDURATION).toBe(1);
+        expect(constants.NOTATIONDOTCOUNT).toBe(2);
+        expect(constants.NOTATIONTUPLETVALUE).toBe(3);
+        expect(constants.NOTATIONROUNDDOWN).toBe(4);
+        expect(constants.NOTATIONINSIDECHORD).toBe(5);
+        expect(constants.NOTATIONSTACCATO).toBe(6);
+    });
+
+    test("exports exactly the expected set of keys", () => {
+        const expectedKeys = [
+            "DEFAULTVOLUME",
+            "PREVIEWVOLUME",
+            "DEFAULTDELAY",
+            "OSCVOLUMEADJUSTMENT",
+            "TONEBPM",
+            "TARGETBPM",
+            "TURTLESTEP",
+            "NOTEDIV",
+            "NOMICERRORMSG",
+            "NANERRORMSG",
+            "NOSTRINGERRORMSG",
+            "NOBOXERRORMSG",
+            "NOACTIONERRORMSG",
+            "NOINPUTERRORMSG",
+            "NOSQRTERRORMSG",
+            "ZERODIVIDEERRORMSG",
+            "EMPTYHEAPERRORMSG",
+            "POSNUMBER",
+            "INVALIDPITCH",
+            "NOTATIONNOTE",
+            "NOTATIONDURATION",
+            "NOTATIONDOTCOUNT",
+            "NOTATIONTUPLETVALUE",
+            "NOTATIONROUNDDOWN",
+            "NOTATIONINSIDECHORD",
+            "NOTATIONSTACCATO"
+        ];
+        expect(Object.keys(constants).sort()).toEqual(expectedKeys.sort());
+    });
+
+    test("does not pollute the global scope", () => {
+        expect(global.DEFAULTVOLUME).toBeUndefined();
+        expect(global.TONEBPM).toBeUndefined();
+        expect(global.NOTATIONNOTE).toBeUndefined();
+    });
+});