test(bot): test the LITERAL filter

src/bot/__tests__/filters.test.ts

@@ -118,7 +118,52 @@ describe("Match: ANY", () => {
     runFilterTest(filter, testCases);
 });
 
-describe("Match: LITERAL", () => {  });
+describe("Match: LITERAL", () => {
+    const filter: prisma.Filter = {
+        ...templateFilter,
+        name: "Block Weekly Pop Quiz",
+        value: String.raw`Pop Quiz`,
+        matching_algorithm: MatchingAlgorithms.EXACT,
+        is_insensitive: false
+    };
+
+    const testCases: FilterTestCase[] = [
+        {
+            input: "Pop Quiz 01: Win potential prizes in our first weekly pop quiz!",
+            expected: true
+        },
+        {
+            input: "The price of petrol has fallen for the first time in 5 years.",
+            expected: false
+        },
+        {
+            input: "The President's expected to deliver a speech for the easter holidays",
+            expected: false
+        },
+        {
+            input: "Pop Quiz: in todays quiz, the prizes include $1000 USD!",
+            expected: true
+        },
+        {
+            input: "The number of pop quizes at our disposoal is near infinite.",
+            expected: false
+        },
+        {
+            input: "Pop Quiz!",
+            expected: true
+        },
+        {
+            input: "There will be no Pop Quiz this week.",
+            expected: true
+        },
+        {
+            input: "There will be a pop quiz this week",
+            expected: false  // case sensitive
+        }
+    ];
+
+    runFilterTest(filter, testCases);
+});
 
 describe("Match: REGEX", () => {
     const filter: prisma.Filter = {