test/system: do not connect to github server

This is an unnecessary network connection that flakes from time to time.
Spawn our own local server instead and use that. That also allows to
check that the actual file content has been copied.

Signed-off-by: Paul Holzinger <[email protected]>

Author: Luap99

test/system/070-build.bats

@@ -5,6 +5,7 @@
 #
 
 load helpers
+load helpers.network
 
 # bats test_tags=distro-integration
 @test "podman build - basic test" {
@@ -279,20 +280,41 @@ EOF
     tmpdir=$PODMAN_TMPDIR/build-test
     mkdir -p $tmpdir
 
+    # Create a test file with random content
+    INDEX=$PODMAN_TMPDIR/index.txt
+    local content="test-$(random_string)"
+    echo "$content" > $INDEX
+    echo READY > $PODMAN_TMPDIR/ready
+
+    # Setup local webserver
+    local host_port=$(random_free_port)
+    local server=http://127.0.0.1:$host_port
+    serverctr="c1-$(safename)"
+    run_podman run -d --name $serverctr -p "$host_port:80" \
+               -v $INDEX:/var/www/index.txt:Z \
+               -v $PODMAN_TMPDIR/ready:/var/www/ready:Z \
+               -w /var/www \
+               $IMAGE /bin/busybox-extras httpd -f -p 80
+
+    wait_for_command_output "curl -s -S $server/ready" "READY"
+
     cat >$tmpdir/Dockerfile <<EOF
 FROM $IMAGE
-ADD https://github.com/containers/podman/blob/main/README.md /tmp/
+ADD $server/index.txt /tmp/
 EOF
 
     imgname="b-$(safename)"
     run_podman build -t $imgname $tmpdir
-    run_podman run --rm $imgname stat /tmp/README.md
+    run_podman run --rm $imgname cat /tmp/index.txt
+    assert "$output" == "$content" "file has right content"
     run_podman rmi -f $imgname
 
     # Now test COPY. That should fail.
     sed -i -e 's/ADD/COPY/' $tmpdir/Dockerfile
     run_podman 125 build -t $imgname $tmpdir
     is "$output" ".* building at STEP .*: source can't be a URL for COPY"
+
+    run_podman rm -f -t0 $serverctr
 }