Rename directory "engines" to "languages"

languages/deadfish/tests/index.test.ts

@@ -0,0 +1,40 @@
+import { readTestProgram, executeProgram } from "../../test-utils";
+import Engine from "../runtime";
+
+/**
+ * All test programs are picked up from https://esolangs.org/wiki/Deadfish.
+ */
+
+describe("Test programs", () => {
+  // Standard hello-world program
+  test("hello world", async () => {
+    const code = readTestProgram(__dirname, "helloworld");
+    const result = await executeProgram(new Engine(), code);
+    expect(result.output).toBe("7210110810811132119111114108100");
+    expect(result.rendererState.value).toBe(100);
+  });
+
+  // Test program 1, output 0
+  test("output zero (1)", async () => {
+    const code = readTestProgram(__dirname, "zero1");
+    const result = await executeProgram(new Engine(), code);
+    expect(result.output).toBe("0");
+    expect(result.rendererState.value).toBe(0);
+  });
+
+  // Test program 2, output 0
+  test("output zero (2)", async () => {
+    const code = readTestProgram(__dirname, "zero2");
+    const result = await executeProgram(new Engine(), code);
+    expect(result.output).toBe("0");
+    expect(result.rendererState.value).toBe(0);
+  });
+
+  // Test program 3, output 288
+  test("output 288", async () => {
+    const code = readTestProgram(__dirname, "288");
+    const result = await executeProgram(new Engine(), code);
+    expect(result.output).toBe("288");
+    expect(result.rendererState.value).toBe(288);
+  });
+});