From f1eea963d0f3ba8f2837cec44c165fca98c39fb0 Mon Sep 17 00:00:00 2001
From: Rod Vagg <rod@vagg.org>
Date: Thu, 8 Apr 2021 15:03:48 +1000
Subject: [PATCH] chore: add TypeScript use test

---
 package.json              | 11 +++++----
 test/ts-use/.gitignore    |  3 +++
 test/ts-use/package.json  | 11 +++++++++
 test/ts-use/src/main.ts   | 51 +++++++++++++++++++++++++++++++++++++++
 test/ts-use/tsconfig.json |  9 +++++++
 5 files changed, 80 insertions(+), 5 deletions(-)
 create mode 100644 test/ts-use/.gitignore
 create mode 100644 test/ts-use/package.json
 create mode 100644 test/ts-use/src/main.ts
 create mode 100644 test/ts-use/tsconfig.json

diff --git a/package.json b/package.json
index 33f223f..1811570 100644
--- a/package.json
+++ b/package.json
@@ -6,17 +6,18 @@
   "types": "./types/index.d.ts",
   "type": "module",
   "scripts": {
-    "lint": "standard",
+    "lint": "standard *.js test/*.js",
     "build": "npm run build:js && npm run build:types",
     "build:js": "npm_config_yes=true ipjs build --tests --main && npm run build:copy",
-    "build:copy": "cp -a tsconfig.json index.js test/ dist/",
+    "build:copy": "cp -a tsconfig.json index.js dist/ && mkdir -p dist/test && cp test/*.js dist/test/",
     "build:types": "npm run build:copy && cd dist && tsc --build",
     "check": "tsc --build --noErrorTruncation",
     "publish": "npm_config_yes=true ipjs publish",
-    "test:cjs": "npm run build && mocha dist/cjs/node-test/test-*.js",
+    "test:cjs": "npm run build && mocha dist/cjs/node-test/test-*.js && npm run test:cjs:browser",
     "test:node": "hundreds mocha test/test-*.js",
-    "test:browser": "polendina --cleanup dist/cjs/node-test/test-*.js",
-    "test": "npm run lint && npm run test:node && npm run test:cjs && npm run test:browser",
+    "test:cjs:browser": "polendina --cleanup dist/cjs/node-test/test-*.js",
+    "test:ts": "npm run build:types && npm run test --prefix test/ts-use",
+    "test": "npm run lint && npm run test:node && npm run test:cjs && npm run test:ts",
     "coverage": "c8 --reporter=html mocha test/test-*.js && npx st -d coverage -p 8080"
   },
   "exports": {
diff --git a/test/ts-use/.gitignore b/test/ts-use/.gitignore
new file mode 100644
index 0000000..6881777
--- /dev/null
+++ b/test/ts-use/.gitignore
@@ -0,0 +1,3 @@
+node_modules
+src/main.js
+tsconfig.tsbuildinfo
diff --git a/test/ts-use/package.json b/test/ts-use/package.json
new file mode 100644
index 0000000..7456b05
--- /dev/null
+++ b/test/ts-use/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "ts-use",
+  "private": true,
+  "dependencies": {
+    "@ipld/dag-cbor": "file:../../dist/",
+    "multiformats": "file:../../node_modules/multiformats"
+  },
+  "scripts": {
+    "test": "npm install && npx -p typescript tsc && node src/main.js"
+  }
+}
diff --git a/test/ts-use/src/main.ts b/test/ts-use/src/main.ts
new file mode 100644
index 0000000..6cf48cf
--- /dev/null
+++ b/test/ts-use/src/main.ts
@@ -0,0 +1,51 @@
+import { deepStrictEqual } from 'assert'
+
+import { BlockEncoder, BlockDecoder, BlockCodec, CodecFeature } from 'multiformats/codecs/interface'
+import * as dagCbor from '@ipld/dag-cbor'
+
+const main = () => {
+  // make sure we have a full CodecFeature
+  useCodecFeature(dagCbor)
+}
+
+function useCodecFeature (codec: CodecFeature<0x71, any>) {
+  // use only as a BlockEncoder
+  const { encoder } = codec
+  useEncoder(encoder)
+
+  // use only as a BlockDecoder
+  const { decoder } = codec
+  useDecoder(decoder)
+
+  // use as a full BlockCodec which does both BlockEncoder & BlockDecoder
+  useBlockCodec(codec)
+
+  // use BlockEncoder & BlockDecoder as a full BlockCodec
+  // (demonstrates and tests BlockEncoder & BlockDecoder composability)
+  useBlockCodec(Object.assign({}, encoder, decoder))
+}
+
+function useEncoder<Codec extends number> (encoder: BlockEncoder<Codec, string>) {
+  deepStrictEqual(encoder.code, 0x71)
+  deepStrictEqual(encoder.name, 'dag-cbor')
+  deepStrictEqual(Array.from(encoder.encode('blip')), [100, 98, 108, 105, 112])
+  console.log('[TS] ✓ { encoder: BlockEncoder }')
+}
+
+function useDecoder<Codec extends number> (decoder: BlockDecoder<Codec, Uint8Array>) {
+  deepStrictEqual(decoder.code, 0x71)
+  deepStrictEqual(decoder.decode(Uint8Array.from([100, 98, 108, 105, 112])), 'blip')
+  console.log('[TS] ✓ { decoder: BlockDecoder }')
+}
+
+function useBlockCodec<Codec extends number> (blockCodec: BlockCodec<Codec, string>) {
+  deepStrictEqual(blockCodec.code, 0x71)
+  deepStrictEqual(blockCodec.name, 'dag-cbor')
+  deepStrictEqual(Array.from(blockCodec.encode('blip')), [100, 98, 108, 105, 112])
+  deepStrictEqual(blockCodec.decode(Uint8Array.from([100, 98, 108, 105, 112])), 'blip')
+  console.log('[TS] ✓ {}:BlockCodec')
+}
+
+main()
+
+export default main
diff --git a/test/ts-use/tsconfig.json b/test/ts-use/tsconfig.json
new file mode 100644
index 0000000..ff14759
--- /dev/null
+++ b/test/ts-use/tsconfig.json
@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "moduleResolution": "node",
+    "noImplicitAny": true,
+    "skipLibCheck": true,
+    "incremental": true
+  }
+}