use the downstream-test-go action

Author: Scott Nichols

.github/workflows/knative-downstream.yaml

@@ -23,7 +23,7 @@ on:
 jobs:
 
   downstream:
-    name: Verify Downstream
+    name: Downstream Eventing
     strategy:
       matrix:
         go-version: [1.15.x]
@@ -46,42 +46,10 @@ jobs:
       run: |
         go get github.com/google/go-licenses
 
-    - name: Check upstream repo into onto GOPATH
-      uses: actions/checkout@v2
-      with:
-        path: ./src/knative.dev/${{ github.event.repository.name }}
-
-    - name: Check downstream repo into onto GOPATH
-      uses: actions/checkout@v2
+    - name: Test Downstream
+      uses: knative-sandbox/downstream-test-go@v1
       with:
-        repository: knative/eventing             # TODO: gonna hardcode for now.
-        path: ./src/knative.dev/eventing         # TODO: gonna hardcode for now.
-
-
-    - name: Replace Downstream with Local Upstream
-      shell: bash
-      run: |
-        pushd ./src/knative.dev/eventing        # TODO: gonna hardcode for now.
-        go mod edit -replace knative.dev/${{ github.event.repository.name }}=$GITHUB_WORKSPACE/src/knative.dev/${{ github.event.repository.name }}
-        popd
+        upstream-module: knative.dev/pkg
+        downstream-repository: knative/eventing
+        downstream-module: knative.dev/eventing
 
-    - name: Downstream Update Deps
-      shell: bash
-      run: |
-        pushd ./src/knative.dev/eventing        # TODO: gonna hardcode for now.
-        ./hack/update-deps.sh
-        popd
-
-    - name:  Downstream Update Codegen
-      shell: bash
-      run: |
-        pushd ./src/knative.dev/eventing       # TODO: gonna hardcode for now.
-        ./hack/update-codegen.sh
-        popd
-
-    - name: Test Downstream
-      shell: bash
-      run: |
-        pushd ./src/knative.dev/eventing       # TODO: gonna hardcode for now.
-        go test -race ./...
-        popd