更新到Angular6和Karma 1.7.1后，Ng测试忽略--environment标志

Question

在升级到Angular 6和Karma 1.7.1之后，命令ng test --environment=test不再考虑--environment标志，并且始终使用dev的值（来自environment.ts）运行。

有谁知道如何解决这个问题？来自singleRun: false的karma.conf.js也不再受到尊重，浏览器在完成后立即关闭。

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "meteor-app": {
      "root": "",
      "sourceRoot": "src",
      "projectType": "application",
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist",
            "index": "src/index.html",
            "main": "src/main.ts",
            "tsConfig": "src/tsconfig.app.json",
            "polyfills": "src/polyfills.ts",
            "stylePreprocessorOptions": {
              "includePaths": [
                "src/sass",
                "node_modules"
              ]
            },
            "assets": [
              "src/assets"
            ],
            "styles": [
              "src/sass/styles.scss",
              "node_modules/ng2-toasty/style-material.css"
            ],
            "scripts": []
          },
          "configurations": {
            "test": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.test.ts"
                }
              ]
            },
            "staging": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.staging.ts"
                }
              ]
            },
            "production": {
              "optimization": true,
              "outputHashing": "all",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ]
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "meteor-app:build"
          },
          "configurations": {
            "test": {
              "browserTarget": "meteor-app:build:test"
            },
            "staging": {
              "browserTarget": "meteor-app:build:staging"
            },
            "production": {
              "browserTarget": "meteor-app:build:production"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "meteor-app:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "karmaConfig": "./karma.conf.js",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "scripts": [],
            "styles": [
              "src/sass/styles.scss",
              "node_modules/ng2-toasty/style-material.css"
            ],
            "assets": [
              "src/assets"
            ],
            "fileReplacements": [
              {
                "replace": "src/environments/environment.ts",
                "with": "src/environments/environment.test.ts"
              }
            ],
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "src/tsconfig.app.json",
              "src/tsconfig.spec.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    },
    "meteor-app-e2e": {
      "root": "",
      "sourceRoot": "",
      "projectType": "application",
      "architect": {
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "./protractor.conf.js",
            "devServerTarget": "meteor-app:serve"
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "e2e/tsconfig.e2e.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    }
  },
  "defaultProject": "meteor-app",
  "cli": {
    "warnings": {
      "typescriptMismatch": false
    }
  },
  "schematics": {
    "@schematics/angular:component": {
      "prefix": "swc",
      "styleext": "scss"
    },
    "@schematics/angular:directive": {
      "prefix": "swc"
    }
  }
}

Answer 1

不幸的是，我认为角度Cli存在一个问题，因为创建一个新的应用程序并运行ng test --prod这是ng test --configuration=production的简写失败，我相信它必须开箱即用。

我已经通过在fileReplacements配置中使用以下angular.json解决了这个问题，虽然我认为它是一种解决方法而不是一个合适的解决方案：

 "test": {
            ...
            "fileReplacements": [
              {
                "replace": "src/environments/environment.ts",
                "with": "src/environments/environment.test.ts"
              }
            ],
          }

希望它能帮助其他人解决同样的问题。