simplify test image build by removing TEST_IMAGE_SRC

.github/workflows/test.yaml

@@ -33,7 +33,6 @@ jobs:
     env:
       COMPOSE_PROJECT_NAME: ci_${{ matrix.job.image }}_${{github.run_id}}_${{github.run_attempt || '1'}}
       TEST_IMAGE: ${{ matrix.job.image }}
-      TEST_IMAGE_SRC: ${{ matrix.job.image }}
 
     strategy:
       fail-fast: false

README.md

@@ -44,7 +44,7 @@ TEDGE_C8Y_OPERATIONS_AUTO_LOG_UPLOAD=always
 
 #### Testing
 
-The system tests are writing using the [RobotFramework](https://robotframework.org/) with some custom thin-edge.io libraries. Generally the test framework will spin up a new container engine environment (defined by the `TEST_IMAGE` and `TEST_IMAGE_SRC` variables). In the test itself, a new instance of the **tedge-container-bundle** will be created which the test then uses to check the specified functionality. Using this setup does bring a but if complexity into the setup, however it is necessary to ensure that the **tedge-container-bundle** can be tested against multiple container engine environments (e.g. docker, podman and different versions of each), whilst it also provides a test environment which does not pollute your host's container engine environment.
+The system tests are writing using the [RobotFramework](https://robotframework.org/) with some custom thin-edge.io libraries. Generally the test framework will spin up a new container engine environment (defined by the `TEST_IMAGE` variable). In the test itself, a new instance of the **tedge-container-bundle** will be created which the test then uses to check the specified functionality. Using this setup does bring a but if complexity into the setup, however it is necessary to ensure that the **tedge-container-bundle** can be tested against multiple container engine environments (e.g. docker, podman and different versions of each), whilst it also provides a test environment which does not pollute your host's container engine environment.
 
 The following tools are required to run the tests:
 

justfile

@@ -14,7 +14,6 @@ RELEASE_VERSION := env_var_or_default("RELEASE_VERSION", `date +'%Y%m%d.%H%M'`)
 
 # Test Variables
 TEST_IMAGE := env_var_or_default("TEST_IMAGE", "debian-systemd-docker-cli")
-TEST_IMAGE_SRC := env_var_or_default("TEST_IMAGE_SRC", "debian-systemd-docker-cli")
 
 
 # Initialize a dotenv file for usage with a local debugger
@@ -23,7 +22,6 @@ init-dotenv:
   @echo "Recreating .env file..."
   @echo "DEVICE_ID=$DEVICE_ID" > .env
   @echo "TEST_IMAGE=$IMAGE" >> .env
-  @echo "TEST_IMAGE_SRC=$IMAGE_SRC" >> .env
   @echo "C8Y_BASEURL=$C8Y_BASEURL" >> .env
   @echo "C8Y_USER=$C8Y_USER" >> .env
   @echo "C8Y_PASSWORD=$C8Y_PASSWORD" >> .env
@@ -64,7 +62,7 @@ lint *ARGS:
 # Build test images
 build-test: build-test-bundles
     echo "Creating test infrastructure image"
-    [ -d "./test-images/{{TEST_IMAGE_SRC}}" ] && docker build --load -t {{TEST_IMAGE}} -f ./test-images/{{TEST_IMAGE_SRC}}/Dockerfile . || docker pull "{{TEST_IMAGE}}"
+    [ -d "./test-images/{{TEST_IMAGE}}" ] && docker build --load -t {{TEST_IMAGE}} -f ./test-images/{{TEST_IMAGE}}/Dockerfile . || docker pull "{{TEST_IMAGE}}"
 
 build-test-bundles:
     echo "Building tedge-container-bundle images"