2 files changed, 21 insertions, 2 deletions
diff --git a/tests/type-consistency/spec/index.ts b/tests/type-consistency/spec/index.ts
index 780c20c..c9b8c7a 100644
--- a/tests/type-consistency/spec/index.ts
+++ b/tests/type-consistency/spec/index.ts
@@ -2,7 +2,7 @@ import array from "./array";
 import functions from "./function";
 import types from "./types";
 import tostring from "./tostring";
-import mapreduce from "./mapReduce";
+import mapreducefilter from "./mapReduceFilter";
 import recursion from "./recursion";
 
-export default [array, functions, types, tostring, mapreduce, recursion];
+export default [array, functions, types, tostring, mapreducefilter, recursion];
diff --git a/tests/type-consistency/spec/mapReduce.ts b/tests/type-consistency/spec/mapReduceFilter.ts
index b5077ff..4594e71 100644
--- a/tests/type-consistency/spec/mapReduce.ts
+++ b/tests/type-consistency/spec/mapReduceFilter.ts
@@ -31,4 +31,23 @@ export default createTestHarness({
       { input: [], output: 0 },
       { input: [50, 10, 0], output: 10 },
     ],
+  })
+  .createFunctionTest({
+    name: "Filter: remove 0s",
+    program: "fn(a, filter(a, fn(n, ?(eq(n, 0), false, true))))",
+    cases: [
+      { input: [1, 2, 3], output: [1, 2, 3] },
+      { input: [1, 0, 10], output: [1, 10] },
+      { input: [0, 0, 0], output: [] },
+      { input: [0, 0, 3, 0, 5, 0, 7, 0], output: [3, 5, 7] },
+    ],
+  })
+  .createFunctionTest({
+    name: "Filter: remove first element",
+    program: "fn(a, filter(a, fn(n, idx, ?(eq(idx, 0), false, true))))",
+    cases: [
+      { input: [true, true, false], output: [true, false] },
+      { input: [1, 0, 10], output: [0, 10] },
+      { input: ["hi", ["test", "test2"]], output: [["test", "test2"]] },
+    ],
   });