start to add some (manual) compatibility tests

compatibility-tests/install-ses.js

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+
+// alas '-r esm' vs (native) ESM means we can't import real modules if we
+// start with '-r esm', so import the built distfile. Don't forget to rebuild
+// this file (cd packages/ses && yarn build) after any changes to the SES
+// source files.
+//import { lockdown } from '../packages/ses/src/main.js';
+import { lockdown } from '../packages/ses/dist/ses.cjs';
+
+lockdown();
+// We are now in the "Start Compartment". Our global has all the same
+// powerful things it had before, but the primordials have changed to make
+// them safe to use in the arguments of API calls we make into more limited
+// compartments. 'Compartment' and 'harden' are now present in our global
+// scope.

compatibility-tests/tape-4/.gitignore

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+yarn.lock

compatibility-tests/tape-4/package.json

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+{
+  "name": "tape-4-compat",
+  "private": true,
+  "version": "0",
+  "scripts": {
+    "test": "node -r esm test.js"
+  },
+  "dependencies": {
+    "tape": "4.13.2"
+  },
+  "devDependencies": {
+  }
+}

compatibility-tests/tape-4/test.js

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+import '../install-ses.js';
+import { test } from 'tape';
+
+function parse() {
+  throw TypeError('Error parsing');
+}
+
+test('parse', t => {
+  t.ok(true);
+  t.throws(parse, /Error parsing/, 'expected failure');
+  t.end();
+});

compatibility-tests/tape-5/.gitignore

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+yarn.lock

compatibility-tests/tape-5/package.json

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+{
+  "name": "tape-5-compat",
+  "private": true,
+  "version": "0",
+  "scripts": {
+    "test": "node -r esm test.js"
+  },
+  "dependencies": {
+    "tape": "5.0.0"
+  },
+  "devDependencies": {
+  }
+}

compatibility-tests/tape-5/test.js

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+import '../install-ses.js';
+import { test } from 'tape';
+
+function parse() {
+  throw TypeError('Error parsing');
+}
+
+test('parse', t => {
+  t.ok(true);
+  t.throws(parse, /Error parsing/, 'expected failure');
+  t.end();
+});