Use FORCE_COLOR=0 for all tests

This change ensures that tests work regardless of the value of
FORCE_COLOR environment variable. There are environments where this
variable is set to 1 and the tests fail. For example the tests fail when
they are run from Jetbrains IDEs.

Author: hron

CHANGELOG.md

@@ -7,6 +7,7 @@
 ### Chore & Maintenance
 
 - `[website]` Switch domain to https://jestjs.io ([#6549](https://github.com/facebook/jest/pull/6549))
+- `[tests]` Free tests from the dependency on value of FORCE_COLOR ([#TBD](https://github.com/facebook/jest/pull/TBD/files))
 
 ## 23.2.0
 

e2e/runJest.js

@@ -49,13 +49,8 @@ function runJest(
     );
   }
 
-  const env = options.nodePath
-    ? Object.assign({}, process.env, {
-        FORCE_COLOR: 0,
-        NODE_PATH: options.nodePath,
-      })
-    : process.env;
-
+  const env = Object.assign({}, process.env, {FORCE_COLOR: 0});
+  if (options.nodePath) env['NODE_PATH'] = options.nodePath;
   const result = spawnSync(JEST_PATH, args || [], {
     cwd: dir,
     env,
@@ -118,12 +113,8 @@ runJest.until = async function(
     );
   }
 
-  const env = options.nodePath
-    ? Object.assign({}, process.env, {
-        FORCE_COLOR: 0,
-        NODE_PATH: options.nodePath,
-      })
-    : process.env;
+  const env = Object.assign({}, process.env, {FORCE_COLOR: 0});
+  if (options.nodePath) env['NODE_PATH'] = options.nodePath;
 
   const jestPromise = execa(JEST_PATH, args || [], {
     cwd: dir,

package.json

@@ -39,8 +39,8 @@
     "flow-bin": "^0.75.0",
     "glob": "^7.1.1",
     "graceful-fs": "^4.1.11",
-    "istanbul-api": "^1.3.1",
-    "istanbul-lib-coverage": "^1.0.0",
+    "istanbul-api": "^2.0.0",
+    "istanbul-lib-coverage": "^2.0.0",
     "jasmine-reporters": "^2.2.0",
     "jest-junit": "^5.1.0",
     "jest-silent-reporter": "^0.0.5",

packages/jest-cli/package.json

@@ -11,10 +11,10 @@
     "graceful-fs": "^4.1.11",
     "import-local": "^1.0.0",
     "is-ci": "^1.0.10",
-    "istanbul-api": "^1.3.1",
-    "istanbul-lib-coverage": "^1.2.0",
-    "istanbul-lib-instrument": "^1.10.1",
-    "istanbul-lib-source-maps": "^1.2.4",
+    "istanbul-api": "^2.0.0",
+    "istanbul-lib-coverage": "^2.0.0",
+    "istanbul-lib-instrument": "^2.3.0",
+    "istanbul-lib-source-maps": "^2.0.0",
     "jest-changed-files": "^23.2.0",
     "jest-config": "^23.2.0",
     "jest-environment-jsdom": "^23.2.0",