test: use car fixtures in sharness t0400

test/sharness/t0400-api-no-gateway.sh

@@ -10,21 +10,26 @@ test_description="Test API security"
 
 test_init_ipfs
 
+# Import test case
+# See the static fixtures in ./t0400-api-no-gateway/
+test_expect_success "Add the test directory" '
+  ipfs dag import ../t0400-api-no-gateway/fixtures.car
+'
+HASH=QmNYERzV2LfD2kkfahtfv44ocHzEFK1sLBaE7zdcYT2GAZ # a file containing the string "testing"
+
 # by default, we don't let you load arbitrary ipfs objects through the api,
 # because this would open up the api to scripting vulnerabilities.
 # only the webui objects are allowed.
 # if you know what you're doing, go ahead and pass --unrestricted-api.
 
 test_launch_ipfs_daemon
 test_expect_success "Gateway on API unavailable" '
-  HASH=$(echo "testing" | ipfs add -q)
   test_curl_resp_http_code "http://127.0.0.1:$API_PORT/ipfs/$HASH" "HTTP/1.1 404 Not Found"
 '
 test_kill_ipfs_daemon
 
 test_launch_ipfs_daemon --unrestricted-api
 test_expect_success "Gateway on --unrestricted-api API available" '
-  HASH=$(echo "testing" | ipfs add -q)
   test_curl_resp_http_code "http://127.0.0.1:$API_PORT/ipfs/$HASH" "HTTP/1.1 200 OK"
 '
 test_kill_ipfs_daemon

test/sharness/t0400-api-no-gateway/README.md

@@ -0,0 +1,15 @@
+# Dataset description/sources
+
+- fixtures.car
+  - raw CARv1
+
+generated with:
+
+```sh
+HASH=$(echo "testing" | ipfs add -q)
+ipfs dag export $HASH > fixtures.car
+
+echo HASH=${HASH} # a file containing the string "testing"
+
+# HASH=QmNYERzV2LfD2kkfahtfv44ocHzEFK1sLBaE7zdcYT2GAZ # a file containing the string "testing"
+```