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{ assertEquals, assert } from \"../../test/assert.ts\";\nimport { ExpiringCache } from \"./cache.ts\";\n\nDeno.test(\"cache get/set: stores and retrieves values\", () => {\n const cache = new ExpiringCache(60_000, 100);\n cache.set(\"a\", 1);\n assertEquals(cache.get(\"a\"), 1);\n});\n\nDeno.test(\"cache get: returns undefined for missing keys\", () => {\n const cache = new ExpiringCache(60_000, 100);\n assertEquals(cache.get(\"missing\"), undefined);\n});\n\nDeno.test(\"cache TTL: expired entries return undefined\", () => {\n const cache = new ExpiringCache(0, 100);\n cache.set(\"a\", 1);\n // TTL of 0ms means it expires immediately\n assertEquals(cache.get(\"a\"), undefined);\n});\n\nDeno.test(\"cache max entries: evicts oldest when full\", () => {\n const cache = new ExpiringCache(60_000, 2);\n cache.set(\"a\", 1);\n cache.set(\"b\", 2);\n cache.set(\"c\", 3); // should evict \"a\"\n assertEquals(cache.get(\"a\"), undefined);\n assertEquals(cache.get(\"b\"), 2);\n assertEquals(cache.get(\"c\"), 3);\n});\n\nDeno.test(\"cache max entries: updating existing key does not evict\", () => {\n const cache = new ExpiringCache(60_000, 2);\n cache.set(\"a\", 1);\n cache.set(\"b\", 2);\n cache.set(\"a\", 10); // update, not new entry\n assertEquals(cache.get(\"a\"), 10);\n assertEquals(cache.get(\"b\"), 2);\n});\n\nDeno.test(\"cache delete: removes entry\", () => {\n const cache = new ExpiringCache(60_000, 100);\n cache.set(\"a\", 1);\n cache.delete(\"a\");\n assertEquals(cache.get(\"a\"), undefined);\n});\n\nDeno.test(\"cache delete: no-op for missing key\", () => {\n const cache = new ExpiringCache(60_000, 100);\n cache.delete(\"missing\"); // should not throw\n});\n\nDeno.test(\"cache getOrFetch: returns cached value without calling fetcher\", async () => {\n const cache = new ExpiringCache(60_000, 100);\n cache.set(\"a\", 42);\n let called = false;\n const value = await cache.getOrFetch(\"a\", async () => {\n called = true;\n return 99;\n });\n assertEquals(value, 42);\n assertEquals(called, false);\n});\n\nDeno.test(\"cache getOrFetch: calls fetcher and caches on miss\", async () => {\n const cache = new ExpiringCache(60_000, 100);\n let callCount = 0;\n const value = await cache.getOrFetch(\"a\", async () => {\n callCount++;\n return 42;\n });\n assertEquals(value, 42);\n assertEquals(callCount, 1);\n // Second call should use cache\n const value2 = await cache.getOrFetch(\"a\", async () => {\n callCount++;\n return 99;\n });\n assertEquals(value2, 42);\n assertEquals(callCount, 1);\n});\n\nDeno.test(\"cache getOrFetch: re-fetches after TTL expiration\", async () => {\n const cache = new ExpiringCache(0, 100); // 0ms TTL\n let callCount = 0;\n await cache.getOrFetch(\"a\", async () => { callCount++; return 1; });\n assertEquals(callCount, 1);\n // TTL expired immediately, should re-fetch\n const value = await cache.getOrFetch(\"a\", async () => { callCount++; return 2; });\n assertEquals(value, 2);\n assertEquals(callCount, 2);\n});\n\nDeno.test(\"cache getOrFetch: fetcher exception propagates\", async () => {\n const cache = new ExpiringCache(60_000, 100);\n let threw = false;\n try {\n await cache.getOrFetch(\"a\", async () => { throw new Error(\"boom\"); });\n } catch (e) {\n threw = true;\n assertEquals((e as Error).message, \"boom\");\n }\n assertEquals(threw, true);\n // Value should not be cached after error\n assertEquals(cache.get(\"a\"), undefined);\n});\n","deleted","label",[183,184,165],"discord","helpers","permalink","https://www.val.town/x/catalloc/catnip/code/discord/helpers/cache_test.ts","extension","actionData","errors"]