Support `NO_COLOR` environment variable (#3055)

1 files changed, 35 insertions, 0 deletions

diff --git a/test/cli/bun.test.ts b/test/cli/bun.test.ts
new file mode 100644
index 000000000..97ea52ecd
--- /dev/null
+++ b/test/cli/bun.test.ts
@@ -0,0 +1,35 @@
+import { describe, test, expect } from "bun:test";
+import { spawnSync } from "bun";
+import { bunExe } from "harness";
+
+describe("bun", () => {
+  describe("NO_COLOR", () => {
+    for (const value of ["1", "0", "foo", " "]) {
+      test(`respects NO_COLOR=${JSON.stringify(value)} to disable color`, () => {
+        const { stdout } = spawnSync({
+          cmd: [bunExe()],
+          env: {
+            NO_COLOR: value,
+          },
+        });
+        expect(stdout.toString()).not.toMatch(/\u001b\[\d+m/);
+      });
+    }
+    for (const value of ["", undefined]) {
+      // TODO: need a way to fake a tty in order to test this,
+      // and cannot use FORCE_COLOR since that will always override NO_COLOR.
+      test.todo(`respects NO_COLOR=${JSON.stringify(value)} to enable color`, () => {
+        const { stdout } = spawnSync({
+          cmd: [bunExe()],
+          env:
+            value === undefined
+              ? {}
+              : {
+                  NO_COLOR: value,
+                },
+        });
+        expect(stdout.toString()).toMatch(/\u001b\[\d+m/);
+      });
+    }
+  });
+});