fix: apply source-maps to test errors

When we got rid of ts-node in #602, we also unintentionally dropped
the code modifying error stack traces to point to original TypeScript
sources instead of the transpiled JavaScript output.

As a result, assertion failures contained stack traces pointing to code
that we are not familiar with, which made troubleshooing difficult.

This commits add source-map-support as a dependency of our projects
and modifies shared `mocha.opts` to register it at runtime.

package.json

@@ -9,7 +9,6 @@
     "node": ">=6"
   },
   "license": "MIT",
-  "dependencies": {},
   "devDependencies": {
     "@commitlint/cli": "^5.2.5",
     "@commitlint/config-conventional": "^6.0.2",
@@ -19,7 +18,8 @@
     "coveralls": "^3.0.0",
     "cz-conventional-changelog": "^2.1.0",
     "lerna": "^2.5.1",
-    "mocha": "^4.0.0"
+    "mocha": "^4.0.0",
+    "source-map-support": "^0.5.2"
   },
   "scripts": {
     "bootstrap": "npm i && lerna bootstrap",

packages/authentication/package.json

@@ -37,7 +37,8 @@
     "@loopback/testlab": "^4.0.0-alpha.19",
     "@types/passport": "^0.4.0",
     "@types/passport-http": "^0.3.3",
-    "passport-http": "^0.3.0"
+    "passport-http": "^0.3.0",
+    "source-map-support": "^0.5.2"
   },
   "keywords": [
     "LoopBack",

packages/build/mocha.opts

@@ -1,3 +1,4 @@
 --recursive
 --exit
 --reporter dot
+--require source-map-support/register

packages/build/package.json

@@ -40,10 +40,11 @@
     "prettier:check": "npm run prettier:cli -- -l",
     "prettier:fix": "npm run prettier:cli -- --write",
     "test": "npm run mocha",
-    "mocha": "node bin/select-dist mocha --timeout 30000 --opts mocha.opts \"test/integration/*.js\"",
+    "mocha": "node bin/select-dist mocha --timeout 30000 \"test/integration/*.js\"",
     "posttest": "npm run lint"
   },
   "devDependencies": {
-    "fs-extra": "^5.0.0"
+    "fs-extra": "^5.0.0",
+    "source-map-support": "^0.5.2"
   }
 }

packages/cli/package.json

@@ -33,6 +33,7 @@
     "nsp": "^3.1.0",
     "rimraf": "^2.6.2",
     "sinon": "^4.1.2",
+    "source-map-support": "^0.5.2",
     "yeoman-assert": "^3.1.0",
     "yeoman-test": "^1.7.0"
   },

packages/context/package.json

@@ -31,7 +31,8 @@
     "@loopback/testlab": "^4.0.0-alpha.19",
     "@types/bluebird": "^3.5.18",
     "@types/debug": "^0.0.30",
-    "bluebird": "^3.5.0"
+    "bluebird": "^3.5.0",
+    "source-map-support": "^0.5.2"
   },
   "keywords": [
     "LoopBack",

packages/core/package.json

@@ -31,7 +31,8 @@
   },
   "devDependencies": {
     "@loopback/build": "^4.0.0-alpha.9",
-    "@loopback/testlab": "^4.0.0-alpha.19"
+    "@loopback/testlab": "^4.0.0-alpha.19",
+    "source-map-support": "^0.5.2"
   },
   "files": [
     "README.md",

packages/example-codehub/package.json

@@ -21,6 +21,7 @@
   },
   "devDependencies": {
     "@loopback/testlab": "^4.0.0-alpha.19",
+    "source-map-support": "^0.5.2",
     "ts-node": "^3.3.0"
   }
 }

packages/example-getting-started/package.json

@@ -42,6 +42,7 @@
     "@types/mocha": "^2.2.46",
     "@types/node": "^8.5.8",
     "mocha": "^4.1.0",
+    "source-map-support": "^0.5.2",
     "typescript": "^2.5.2"
   },
   "keywords": [

packages/metadata/package.json

@@ -31,7 +31,8 @@
     "@loopback/build": "^4.0.0-alpha.9",
     "@loopback/testlab": "^4.0.0-alpha.19",
     "@types/debug": "^0.0.30",
-    "@types/lodash": "^4.14.87"
+    "@types/lodash": "^4.14.87",
+    "source-map-support": "^0.5.2"
   },
   "keywords": [
     "LoopBack",

packages/openapi-spec-builder/package.json

@@ -29,7 +29,8 @@
     "@loopback/openapi-spec": "^4.0.0-alpha.20"
   },
   "devDependencies": {
-    "@loopback/build": "^4.0.0-alpha.9"
+    "@loopback/build": "^4.0.0-alpha.9",
+    "source-map-support": "^0.5.2"
   },
   "files": [
     "README.md",

packages/openapi-spec/package.json

@@ -6,7 +6,8 @@
     "node": ">=6"
   },
   "devDependencies": {
-    "@loopback/build": "^4.0.0-alpha.9"
+    "@loopback/build": "^4.0.0-alpha.9",
+    "source-map-support": "^0.5.2"
   },
   "scripts": {
     "build": "npm run build:dist && npm run build:dist6",
@@ -39,5 +40,6 @@
   "repository": {
     "type": "git",
     "url": "https://github.com/strongloop/loopback-next.git"
-  }
+  },
+  "dependencies": {}
 }

packages/openapi-v2/package.json

@@ -8,7 +8,8 @@
   "devDependencies": {
     "@loopback/build": "^4.0.0-alpha.9",
     "@loopback/openapi-spec-builder": "^4.0.0-alpha.17",
-    "@loopback/testlab": "^4.0.0-alpha.19"
+    "@loopback/testlab": "^4.0.0-alpha.19",
+    "source-map-support": "^0.5.2"
   },
   "scripts": {
     "build": "npm run build:dist && npm run build:dist6",

packages/repository/package.json

@@ -26,7 +26,8 @@
   "devDependencies": {
     "@loopback/build": "^4.0.0-alpha.9",
     "@loopback/core": "^4.0.0-alpha.28",
-    "@loopback/testlab": "^4.0.0-alpha.19"
+    "@loopback/testlab": "^4.0.0-alpha.19",
+    "source-map-support": "^0.5.2"
   },
   "dependencies": {
     "@loopback/context": "^4.0.0-alpha.26",

packages/rest/package.json

@@ -42,7 +42,8 @@
     "@loopback/openapi-spec-builder": "^4.0.0-alpha.17",
     "@loopback/testlab": "^4.0.0-alpha.19",
     "@types/js-yaml": "^3.9.1",
-    "@types/lodash": "^4.14.85"
+    "@types/lodash": "^4.14.85",
+    "source-map-support": "^0.5.2"
   },
   "files": [
     "README.md",

packages/testlab/package.json

@@ -32,7 +32,8 @@
     "swagger-parser": "^4.0.1"
   },
   "devDependencies": {
-    "@loopback/build": "^4.0.0-alpha.9"
+    "@loopback/build": "^4.0.0-alpha.9",
+    "source-map-support": "^0.5.2"
   },
   "files": [
     "README.md",