test: add type tests (#4)

Author: fahchen

deno.jsonc

@@ -3,13 +3,16 @@
   "compilerOptions": {
     "strict": true,
     "useUnknownInCatchVariables": true,
-    "noImplicitOverride": true
+    "noImplicitOverride": true,
+    "types": [
+      "./mod.d.ts"
+    ]
   },
   "exclude": [
     ".git"
   ],
   "tasks": {
-    "test": "deno test -A --allow-none --shuffle --parallel",
+    "test": "deno check types_test.ts",
     "check:types": "deno check **/*.ts",
     "check": "deno fmt --check && deno lint && deno task check:types && deno task test"
   }

types_test.ts

@@ -0,0 +1,59 @@
+import {
+  assertType,
+  Has,
+  IsExact,
+  IsNullable,
+} from "https://deno.land/std@0.212.0/testing/types.ts";
+
+// env
+{
+  // get
+  {
+    const value = BreezeRuntime.env.get("foo");
+
+    assertType<IsNullable<typeof value>>(true);
+    assertType<Has<typeof value, string>>(true);
+  }
+
+  // toObject
+  {
+    const values = BreezeRuntime.env.toObject();
+
+    assertType<IsExact<typeof values, Record<string, string | undefined>>>(
+      true,
+    );
+  }
+
+  // has
+  {
+    const value = BreezeRuntime.env.has("foo");
+
+    assertType<IsExact<typeof value, boolean>>(true);
+  }
+}
+
+// plugins
+{
+  // get a plugin
+  {
+    const plugin = BreezeRuntime.plugins.kv;
+
+    assertType<IsExact<typeof plugin, BreezeRuntime.Plugin>>(true);
+  }
+
+  // getEndpoint
+  {
+    const result = BreezeRuntime.plugins.kv.getEndpoint();
+
+    assertType<IsExact<typeof result, Promise<URL>>>(true);
+  }
+}
+
+// serveHttp
+{
+  type Params = Parameters<typeof BreezeRuntime.serveHttp>[0];
+
+  assertType<
+    IsExact<Params, (req: Request) => Response | Promise<Response>>
+  >(true);
+}