[tests] Remote packages with substitutions (#12145)

tests/unit_tests/fixtures/substitutions/06-remote_packages.approved.yaml

@@ -0,0 +1,25 @@
+substitutions:
+  x: 10
+  y: 20
+  z: 30
+values_from_repo1_main:
+  - package_name: package1
+    x: 3
+    y: 4
+    z: 5
+    volume: 60
+  - package_name: package2
+    x: 6
+    y: 7
+    z: 8
+    volume: 336
+  - package_name: default
+    x: 10
+    y: 20
+    z: 5
+    volume: 1000
+  - package_name: package4_from_repo2
+    x: 9
+    y: 10
+    z: 11
+    volume: 990

tests/unit_tests/fixtures/substitutions/06-remote_packages.input.yaml

@@ -0,0 +1,37 @@
+substitutions:
+  x: 10
+  y: 20
+  z: 30
+packages:
+  package1:
+    url: https://github.com/esphome/repo1
+    files:
+      - path: file1.yaml
+        vars:
+          package_name: package1
+          x: 3
+          y: 4
+    ref: main
+  package2: !include  # a package that just includes the given remote package
+    file: remote_package_proxy.yaml
+    vars:
+      url: https://github.com/esphome/repo1
+      ref: main
+      files:
+        - path: file1.yaml
+          vars:
+            package_name: package2
+            x: 6
+            y: 7
+            z: 8
+  package3: github://esphome/repo1/file1.yaml@main  # a package that uses the shorthand syntax
+  package4:  # include repo2, which itself includes repo1
+    url: https://github.com/esphome/repo2
+    files:
+      - path: file2.yaml
+        vars:
+          package_name: package4
+          a: 9
+          b: 10
+          c: 11
+    ref: main

tests/unit_tests/fixtures/substitutions/remote_package_proxy.yaml

@@ -0,0 +1,6 @@
+# acts as a proxy to be able to include a remote package
+# in which the url/ref/files come from a substitution
+packages:
+  - url: ${url}
+    ref: ${ref}
+    files: ${files}

tests/unit_tests/fixtures/substitutions/remotes/README.md

@@ -0,0 +1,3 @@
+This folder contains fake repos for remote packages testing
+These are used by `test_substitutions.py`.
+To add repos, create a folder and add its path to the `REMOTES` constant in `test_substitutions.py`.

tests/unit_tests/fixtures/substitutions/remotes/repo1/main/file1.yaml

@@ -0,0 +1,9 @@
+defaults:
+  z: 5
+  package_name: default
+values_from_repo1_main:
+  - package_name: ${package_name}
+    x: ${x}
+    y: ${y}
+    z: ${z}
+    volume: ${x*y*z}

tests/unit_tests/fixtures/substitutions/remotes/repo2/main/file2.yaml

@@ -0,0 +1,10 @@
+packages:
+  - url: https://github.com/esphome/repo1
+    ref: main
+    files:
+      - path: file1.yaml
+        vars:
+          package_name: ${package_name}_from_repo2
+          x: ${a}
+          y: ${b}
+          z: ${c}