Use mops to run tests (#579)

- Changed test runner to `mops test`.
- Removed `vessel` dependency.
- Now only files with `// @Testmode wasi` comment line will be compiled
and run with wasmtime.

Mops can run tests in parallel, results:
On my laptop: 15s vs 50s
In GitHub CI: 30s vs 1m 33s

---------

Co-authored-by: Ryan Vandersmith <ryanvandersmith@gmail.com>

.github/workflows/ci.yml

@@ -42,8 +42,10 @@ jobs:
       run: |
        wget --output-document /home/runner/bin/vessel https://github.com/kritzcreek/vessel/releases/download/${{ env.vessel_version }}/vessel-linux64
        chmod +x /home/runner/bin/vessel
-    - name: "test"
-      run: MOC_BINARY=moc npm test
+    - name: "test (interpreter mode)"
+      run: DFX_MOC_PATH=moc npm test
+    - name: "test (wasi mode)"
+      run: DFX_MOC_PATH=moc npm test -- --mode wasi
     - name: "graph dependencies"
       run: python3 doc/module_graph.py | dot -Tsvg > doc/module_graph.svg && file doc/module_graph.svg
     - name: "docs"

.gitignore

@@ -14,3 +14,6 @@ node_modules
 # Unit testing
 /test/generated
 *.test.wasm
+
+# Mops
+.mops

README.md

@@ -38,14 +38,32 @@ npm install
 # Run tests
 npm test
 
+# Run all tests in wasi mode
+npm test -- --mode wasi
+
 # Run formatter
 npm run prettier:format
 ```
 
-The test runner will automatically detect the `moc` compiler from your system path or `dfx` installation. 
+The test runner will automatically detect the `moc` compiler from your system path or `dfx` installation.
 
 Running the tests locally also requires [Wasmtime](https://wasmtime.dev/) and [Vessel](https://github.com/dfinity/vessel) to be installed on your system.
 
+Run only specific test files:
+```sh
+npm test <filter>
+```
+
+For example `npm test list` will run `List.test.mo` and `AssocList.test.mo` test files.
+
+Run tests in watch mode:
+```sh
+npm test -- --watch
+
+# useful to combine with filter when writing tests
+npm test array -- --watch
+```
+
 Documentation
 -------------
 

mops.toml

@@ -0,0 +1,3 @@
+[dev-dependencies]
+base = "./"
+matchers = "https://github.com/kritzcreek/motoko-matchers#v1.3.0"