Re: [PATCH v3] t5550: add netrc tests for http 401/403

Ashlesh Gawande [off-list ref] writes:

git allows using .netrc file to supply credentials for HTTP auth.
Three test cases are added in this patch to provide missing coverage
when cloning over HTTP using .netrc file:

  - First test case checks that the git clone is successful when credentials
    are provided via .netrc file
  - Second test case checks that the git clone fails when the .netrc file
    provides invalid credentials. The HTTP server is expected to return
    401 Unauthorized in such a case. The test checks that the user is
    provided with a prompt for username/password on 401 to provide
    the valid ones.
  - Third test case checks that the git clone fails when the .netrc file
    provides credentials that are valid but do not have permission for
    this user. For example one may have multiple tokens in GitHub
    and uses the one which was not authorized for cloning this repo.
    In such a case the HTTP server returns 403 Forbidden.
    For this test, the apache.conf is modified to return a 403
    on finding a forbidden-user. No prompt for username/password is
    expected after the 403 (unlike 401). This is because prompting may wipe
    out existing credentials or conflict with custom credential helpers.

Nicely summarised.  So we say 401 when we do not know you, while we
say 403 when we know you and do not want you to be accessing the
resource.  We test for both.

Just out of curiosity, do we test for these codes with other
credential helpers or is this only relevant for .netrc users?

+test_expect_success 'using credentials from netrc to clone successfully' '
+	test_when_finished clear_netrc &&
+	set_askpass wrong &&
+	set_netrc 127.0.0.1 user@host pass@host &&
+	git clone "$HTTPD_URL/auth/dumb/repo.git" clone-auth-netrc &&
+	expect_askpass none
+'
+
+test_expect_success 'netrc unauthorized credentials (prompt after 401)' '
+	test_when_finished clear_netrc &&
+	set_askpass wrong &&
+	set_netrc 127.0.0.1 user@host pass@wrong &&
+	test_must_fail git clone "$HTTPD_URL/auth/dumb/repo.git" clone-auth-netrc-401 &&
+	expect_askpass both wrong
+'
+
+test_expect_success 'netrc authorized but forbidden credentials (fail on 403)' '
+	test_when_finished clear_netrc &&
+	set_askpass wrong &&
+	set_netrc 127.0.0.1 forbidden-user@host pass@host &&
+	test_must_fail git clone "$HTTPD_URL/auth/dumb/repo.git" clone-auth-netrc-403 2>err &&
+	expect_askpass none &&
+	grep "The requested URL returned error: 403" err
+'
+
 test_expect_success 'http auth can use user/pass in URL' '
 	set_askpass wrong &&
 	git clone "$HTTPD_URL_USER_PASS/auth/dumb/repo.git" clone-auth-none &&