Create matrix.test.js

tests/commands/database/matrix.test.js

@@ -0,0 +1,21 @@
+const fs = require('fs-extra')
+const path = require('path')
+const { execSync } = require('child_process')
+
+beforeEach(() => {
+  fs.emptyDirSync('tests/__data__/output')
+
+  fs.copyFileSync(
+    'tests/__data__/input/database/base_streams.db',
+    'tests/__data__/output/streams.db'
+  )
+})
+
+it('can create valid matrix', () => {
+  const result = execSync('DB_DIR=tests/__data__/output npm run db:matrix', {
+    encoding: 'utf8'
+  })
+  expect(result).toBe(
+    '\n> db:matrix\n> node scripts/commands/database/matrix.js\n\n::set-output name=matrix::{"cluster_id":[1,3]}\n'
+  )
+})