[tests] use testelpa mirror

.github/workflows/elisp_test.yml

@@ -10,6 +10,7 @@ on:
 env:
   TEST_SCRIPT: ./.github/workflows/scripts/test
   TESTELPA_REPO: JAremko/testelpa-develop
+  GITHUB_WORKSPACE: ${{ github.workspace }}
 
 defaults:
   run:
@@ -46,10 +47,10 @@ jobs:
       run: |
         curl -L \
         https://github.com/$TESTELPA_REPO/releases/latest/download/elpa.zip \
-        --output elpa.zip
+        --output /tmp/elpa.zip
 
     - name: Unpack elpa mirror
-      run: unzip elpa.zip -d testelpa_mirror
+      run: unzip /tmp/elpa.zip -d ../testelpa_mirror
 
     - name: Dependencies installation
       run: ${{ env.TEST_SCRIPT }} ${{ matrix.test_root }} installation

.github/workflows/scripts/dot_lock.el

@@ -0,0 +1,16 @@
+(setq configuration-layer-elpa-archives
+      `(("melpa"    . "melpa.org/packages/")
+        ("org"      . "orgmode.org/elpa/")
+        ("gnu"      . "elpa.gnu.org/packages/")
+        ("spacelpa" . ,(concat configuration-layer-stable-elpa-directory
+                               "spacelpa-"
+                               configuration-layer-stable-elpa-version))
+        ("testelpa" . ,(format "%s/../testelpa_mirror"
+                               (getenv "GITHUB_WORKSPACE")))))
+
+(setq package-archive-priorities
+      '(("testelpa" . 9)
+        ("spacelpa" . 8)
+        ("melpa"    . 4)
+        ("org"      . 2)
+        ("gnu"      . 1)))

.github/workflows/scripts/test

@@ -17,6 +17,8 @@ abs_p() {
 }
 
 ln -s "$(pwd)" $HOME/.emacs.d
+cp .github/workflows/scripts/dot_lock.el ~/.emacs.d/.lock
+
 testdir=$(abs_p tests/$1)
 cd ..