chore: Add a couple tsc tests (#1183)

tap-snapshots/test-tsc.js-TAP.test.js

@@ -0,0 +1,26 @@
+/* IMPORTANT
+ * This snapshot file is auto-generated, but designed for humans.
+ * It should be checked into source control and tracked carefully.
+ * Re-generate by setting TAP_SNAPSHOT=1 and running tests.
+ * Make sure to inspect the output below.  Do not ignore changes!
+ */
+'use strict'
+exports[`test/tsc.js TAP ignore source-map > stdout 1`] = `
+------------|---------|----------|---------|---------|-------------------
+File        | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
+------------|---------|----------|---------|---------|-------------------
+All files   |   38.46 |    57.14 |   66.67 |      50 |                   
+ mapping.js |   38.46 |    57.14 |   66.67 |      50 | 3,4,5,6,8         
+------------|---------|----------|---------|---------|-------------------
+
+`
+
+exports[`test/tsc.js TAP reads source-map > stdout 1`] = `
+------------|---------|----------|---------|---------|-------------------
+File        | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
+------------|---------|----------|---------|---------|-------------------
+All files   |     100 |      100 |     100 |     100 |                   
+ mapping.ts |     100 |      100 |     100 |     100 |                   
+------------|---------|----------|---------|---------|-------------------
+
+`

test/fixtures/tsc/.npmrc

@@ -0,0 +1 @@
+package-lock=false

test/fixtures/tsc/mapping.ts

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+function munge1 (obj: Object) {
+  return {
+    name: 'munge1',
+    ...obj
+  };
+}
+
+munge1({})

test/fixtures/tsc/package.json

@@ -0,0 +1,15 @@
+{
+  "private": true,
+  "scripts": {
+    "postinstall": "tsc"
+  },
+  "devDependencies": {
+    "typescript": "^3.6.3"
+  },
+  "nyc": {
+    "reporter": [
+      "text",
+      "html"
+    ]
+  }
+}

test/fixtures/tsc/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "sourceMap": true
+  },
+  "files": [
+    "mapping.ts"
+  ]
+}

test/tsc.js

@@ -0,0 +1,28 @@
+'use strict'
+
+const path = require('path')
+const t = require('tap')
+
+const { testSuccess } = require('./helpers')
+const fixturesTSC = path.resolve(__dirname, 'fixtures/tsc')
+
+t.test('reads source-map', t => testSuccess(t, {
+  cwd: fixturesTSC,
+  args: [
+    '--produce-source-map=true',
+    '--cache=false',
+    process.execPath,
+    'mapping.js'
+  ]
+}))
+
+t.test('ignore source-map', t => testSuccess(t, {
+  cwd: fixturesTSC,
+  args: [
+    '--produce-source-map=true',
+    '--no-source-map',
+    '--cache=false',
+    process.execPath,
+    'mapping.js'
+  ]
+}))