test: fix error msg in unit tests might be [Object object] (#54)

Uncovered lint error from bumping typescript-eslint from 8.15.0 to
8.16.0.

Also fixes incorrect typescript-eslint warning during `yarn lint-js`
about TypeScript 5.7 being unsupported.

Author: JasonWeinzierl

package.json

@@ -75,7 +75,7 @@
     "@stylistic/eslint-plugin": "^2.11.0",
     "@types/common-tags": "^1.8.4",
     "@types/node": "~18.18.0",
-    "@typescript-eslint/rule-tester": "^8.15.0",
+    "@typescript-eslint/rule-tester": "^8.16.0",
     "@typescript/vfs": "^1.6.0",
     "@vitest/coverage-v8": "^2.1.5",
     "@vitest/eslint-plugin": "^1.1.10",
@@ -91,7 +91,7 @@
     "rxjs": "^7.8.1",
     "tsup": "^8.3.5",
     "typescript": "~5.7.2",
-    "typescript-eslint": "^8.15.0",
+    "typescript-eslint": "^8.16.0",
     "vitest": "^2.1.5"
   },
   "engines": {

tests/etc/create-source-file-and-type-checker.ts

@@ -36,7 +36,10 @@ export function createSourceFileAndTypeChecker(
   // Note: If you're having trouble with vfs, run the tests with DEBUG=1 for more output.
   const fileIssues = env.languageService.getSemanticDiagnostics(fileName);
   if (fileIssues.length) {
-    throw new Error(fileIssues.map(diag => diag.messageText).join());
+    throw new Error(fileIssues
+      .map(diag => diag.messageText)
+      .map(msg => typeof msg === 'string' ? msg : msg.messageText)
+      .join());
   }
 
   return {

yarn.lock

@@ -862,15 +862,15 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/eslint-plugin@npm:8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/eslint-plugin@npm:8.15.0"
+"@typescript-eslint/eslint-plugin@npm:8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/eslint-plugin@npm:8.16.0"
   dependencies:
     "@eslint-community/regexpp": "npm:^4.10.0"
-    "@typescript-eslint/scope-manager": "npm:8.15.0"
-    "@typescript-eslint/type-utils": "npm:8.15.0"
-    "@typescript-eslint/utils": "npm:8.15.0"
-    "@typescript-eslint/visitor-keys": "npm:8.15.0"
+    "@typescript-eslint/scope-manager": "npm:8.16.0"
+    "@typescript-eslint/type-utils": "npm:8.16.0"
+    "@typescript-eslint/utils": "npm:8.16.0"
+    "@typescript-eslint/visitor-keys": "npm:8.16.0"
     graphemer: "npm:^1.4.0"
     ignore: "npm:^5.3.1"
     natural-compare: "npm:^1.4.0"
@@ -881,41 +881,41 @@ __metadata:
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/90ef10cc7d37a81abec4f4a3ffdfc3a0da8e99d949e03c75437e96e8ab2e896e34b85ab64718690180a7712581031b8611c5d8e7666d6ed4d60b9ace834d58e3
+  checksum: 10c0/b03612b726ee5aff631cd50e05ceeb06a522e64465e4efdc134e3a27a09406b959ef7a05ec4acef1956b3674dc4fedb6d3a62ce69382f9e30c227bd4093003e5
   languageName: node
   linkType: hard
 
-"@typescript-eslint/parser@npm:8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/parser@npm:8.15.0"
+"@typescript-eslint/parser@npm:8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/parser@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/scope-manager": "npm:8.15.0"
-    "@typescript-eslint/types": "npm:8.15.0"
-    "@typescript-eslint/typescript-estree": "npm:8.15.0"
-    "@typescript-eslint/visitor-keys": "npm:8.15.0"
+    "@typescript-eslint/scope-manager": "npm:8.16.0"
+    "@typescript-eslint/types": "npm:8.16.0"
+    "@typescript-eslint/typescript-estree": "npm:8.16.0"
+    "@typescript-eslint/visitor-keys": "npm:8.16.0"
     debug: "npm:^4.3.4"
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/19c25aea0dc51faa758701a5319a89950fd30494d9d645db8ced84fb60714c5e7d4b51fc4ee8ccb07ddefec88c51ee307ee7e49addd6330ee8f3e7ee9ba329fc
+  checksum: 10c0/e49c6640a7a863a16baecfbc5b99392a4731e9c7e9c9aaae4efbc354e305485fe0f39a28bf0acfae85bc01ce37fe0cc140fd315fdaca8b18f9b5e0addff8ceae
   languageName: node
   linkType: hard
 
-"@typescript-eslint/rule-tester@npm:^8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/rule-tester@npm:8.15.0"
+"@typescript-eslint/rule-tester@npm:^8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/rule-tester@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/typescript-estree": "npm:8.15.0"
-    "@typescript-eslint/utils": "npm:8.15.0"
+    "@typescript-eslint/typescript-estree": "npm:8.16.0"
+    "@typescript-eslint/utils": "npm:8.16.0"
     ajv: "npm:^6.12.6"
     json-stable-stringify-without-jsonify: "npm:^1.0.1"
     lodash.merge: "npm:4.6.2"
     semver: "npm:^7.6.0"
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
-  checksum: 10c0/2359ca436812a75c99a662fc8d8845ec06017212ec249e4041c9b347c923197f6a436f869aad51e878a81023b6db55664cc845b70540e3678d417071c0992dd5
+  checksum: 10c0/d9978b4453050e1eea0becfb66a2956c84fdfa91ded852a93d0b08f254c25704054ae513d36734e05510e48da1d895fa480cad76a32997a345384e2fafb77d78
   languageName: node
   linkType: hard
 
@@ -929,30 +929,30 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/scope-manager@npm:8.15.0, @typescript-eslint/scope-manager@npm:^8.1.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/scope-manager@npm:8.15.0"
+"@typescript-eslint/scope-manager@npm:8.16.0, @typescript-eslint/scope-manager@npm:^8.1.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/scope-manager@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/types": "npm:8.15.0"
-    "@typescript-eslint/visitor-keys": "npm:8.15.0"
-  checksum: 10c0/c27dfdcea4100cc2d6fa967f857067cbc93155b55e648f9f10887a1b9372bb76cf864f7c804f3fa48d7868d9461cdef10bcea3dab7637d5337e8aa8042dc08b9
+    "@typescript-eslint/types": "npm:8.16.0"
+    "@typescript-eslint/visitor-keys": "npm:8.16.0"
+  checksum: 10c0/23b7c738b83f381c6419a36e6ca951944187e3e00abb8e012bce8041880410fe498303e28bdeb0e619023a69b14cf32a5ec1f9427c5382807788cd8e52a46a6e
   languageName: node
   linkType: hard
 
-"@typescript-eslint/type-utils@npm:8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/type-utils@npm:8.15.0"
+"@typescript-eslint/type-utils@npm:8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/type-utils@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/typescript-estree": "npm:8.15.0"
-    "@typescript-eslint/utils": "npm:8.15.0"
+    "@typescript-eslint/typescript-estree": "npm:8.16.0"
+    "@typescript-eslint/utils": "npm:8.16.0"
     debug: "npm:^4.3.4"
     ts-api-utils: "npm:^1.3.0"
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/20f09c79c83b38a962cf7eff10d47a2c01bcc0bab7bf6d762594221cd89023ef8c7aec26751c47b524f53f5c8d38bba55a282529b3df82d5f5ab4350496316f9
+  checksum: 10c0/24c0e815c8bdf99bf488c7528bd6a7c790e8b3b674cb7fb075663afc2ee26b48e6f4cf7c0d14bb21e2376ca62bd8525cbcb5688f36135b00b62b1d353d7235b9
   languageName: node
   linkType: hard
 
@@ -963,10 +963,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/types@npm:8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/types@npm:8.15.0"
-  checksum: 10c0/84abc6fd954aff13822a76ac49efdcb90a55c0025c20eee5d8cebcfb68faff33b79bbc711ea524e0209cecd90c5ee3a5f92babc7083c081d3a383a0710264a41
+"@typescript-eslint/types@npm:8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/types@npm:8.16.0"
+  checksum: 10c0/141e257ab4060a9c0e2e14334ca14ab6be713659bfa38acd13be70a699fb5f36932a2584376b063063ab3d723b24bc703dbfb1ce57d61d7cfd7ec5bd8a975129
   languageName: node
   linkType: hard
 
@@ -988,12 +988,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/typescript-estree@npm:8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/typescript-estree@npm:8.15.0"
+"@typescript-eslint/typescript-estree@npm:8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/typescript-estree@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/types": "npm:8.15.0"
-    "@typescript-eslint/visitor-keys": "npm:8.15.0"
+    "@typescript-eslint/types": "npm:8.16.0"
+    "@typescript-eslint/visitor-keys": "npm:8.16.0"
     debug: "npm:^4.3.4"
     fast-glob: "npm:^3.3.2"
     is-glob: "npm:^4.0.3"
@@ -1003,24 +1003,24 @@ __metadata:
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/3af5c129532db3575349571bbf64d32aeccc4f4df924ac447f5d8f6af8b387148df51965eb2c9b99991951d3dadef4f2509d7ce69bf34a2885d013c040762412
+  checksum: 10c0/f28fea5af4798a718b6735d1758b791a331af17386b83cb2856d89934a5d1693f7cb805e73c3b33f29140884ac8ead9931b1d7c3de10176fa18ca7a346fe10d0
   languageName: node
   linkType: hard
 
-"@typescript-eslint/utils@npm:8.15.0, @typescript-eslint/utils@npm:^8.1.0, @typescript-eslint/utils@npm:^8.13.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/utils@npm:8.15.0"
+"@typescript-eslint/utils@npm:8.16.0, @typescript-eslint/utils@npm:^8.1.0, @typescript-eslint/utils@npm:^8.13.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/utils@npm:8.16.0"
   dependencies:
     "@eslint-community/eslint-utils": "npm:^4.4.0"
-    "@typescript-eslint/scope-manager": "npm:8.15.0"
-    "@typescript-eslint/types": "npm:8.15.0"
-    "@typescript-eslint/typescript-estree": "npm:8.15.0"
+    "@typescript-eslint/scope-manager": "npm:8.16.0"
+    "@typescript-eslint/types": "npm:8.16.0"
+    "@typescript-eslint/typescript-estree": "npm:8.16.0"
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/65743f51845a1f6fd2d21f66ca56182ba33e966716bdca73d30b7a67c294e47889c322de7d7b90ab0818296cd33c628e5eeeb03cec7ef2f76c47de7a453eeda2
+  checksum: 10c0/1e61187eef3da1ab1486d2a977d8f3b1cb8ef7fa26338500a17eb875ca42a8942ef3f2241f509eef74cf7b5620c109483afc7d83d5b0ab79b1e15920f5a49818
   languageName: node
   linkType: hard
 
@@ -1052,13 +1052,13 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/visitor-keys@npm:8.15.0":
-  version: 8.15.0
-  resolution: "@typescript-eslint/visitor-keys@npm:8.15.0"
+"@typescript-eslint/visitor-keys@npm:8.16.0":
+  version: 8.16.0
+  resolution: "@typescript-eslint/visitor-keys@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/types": "npm:8.15.0"
+    "@typescript-eslint/types": "npm:8.16.0"
     eslint-visitor-keys: "npm:^4.2.0"
-  checksum: 10c0/02a954c3752c4328482a884eb1da06ca8fb72ae78ef28f1d854b18f3779406ed47263af22321cf3f65a637ec7584e5f483e34a263b5c8cec60ec85aebc263574
+  checksum: 10c0/537df37801831aa8d91082b2adbffafd40305ed4518f0e7d3cbb17cc466d8b9ac95ac91fa232e7fe585d7c522d1564489ec80052ebb2a6ab9bbf89ef9dd9b7bc
   languageName: node
   linkType: hard
 
@@ -2176,7 +2176,7 @@ __metadata:
     "@stylistic/eslint-plugin": "npm:^2.11.0"
     "@types/common-tags": "npm:^1.8.4"
     "@types/node": "npm:~18.18.0"
-    "@typescript-eslint/rule-tester": "npm:^8.15.0"
+    "@typescript-eslint/rule-tester": "npm:^8.16.0"
     "@typescript-eslint/scope-manager": "npm:^8.1.0"
     "@typescript-eslint/utils": "npm:^8.1.0"
     "@typescript/vfs": "npm:^1.6.0"
@@ -2198,7 +2198,7 @@ __metadata:
     tslib: "npm:^2.1.0"
     tsup: "npm:^8.3.5"
     typescript: "npm:~5.7.2"
-    typescript-eslint: "npm:^8.15.0"
+    typescript-eslint: "npm:^8.16.0"
     vitest: "npm:^2.1.5"
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
@@ -4503,19 +4503,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"typescript-eslint@npm:^8.15.0":
-  version: 8.15.0
-  resolution: "typescript-eslint@npm:8.15.0"
+"typescript-eslint@npm:^8.16.0":
+  version: 8.16.0
+  resolution: "typescript-eslint@npm:8.16.0"
   dependencies:
-    "@typescript-eslint/eslint-plugin": "npm:8.15.0"
-    "@typescript-eslint/parser": "npm:8.15.0"
-    "@typescript-eslint/utils": "npm:8.15.0"
+    "@typescript-eslint/eslint-plugin": "npm:8.16.0"
+    "@typescript-eslint/parser": "npm:8.16.0"
+    "@typescript-eslint/utils": "npm:8.16.0"
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
   peerDependenciesMeta:
     typescript:
       optional: true
-  checksum: 10c0/589aebf0d0b9b79db1cd0b7c2ea08c6b5727c1db095d39077d070c332066c7d549a0eb2ef60b0d41619720c317c1955236c5c8ee6320bc7c6ae475add7223b55
+  checksum: 10c0/3da9401d6c2416b9d95c96a41a9423a5379d233a120cd3304e2c03f191d350ce91cf0c7e60017f7b10c93b4cc1190592702735735b771c1ce1bf68f71a9f1647
   languageName: node
   linkType: hard