diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 70f6026..1ec7a39 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1 +1 @@
-* @im-open/swat
+* @im-open/infra-purple
\ No newline at end of file
diff --git a/.github/workflows/build-and-review-pr.yml b/.github/workflows/build-and-review-pr.yml
index 3a846e2..f809e4e 100644
--- a/.github/workflows/build-and-review-pr.yml
+++ b/.github/workflows/build-and-review-pr.yml
@@ -60,3 +60,153 @@ jobs:
       # The npm script to run to build the action.  This is typically 'npm run build' if the
       # action needs to be compiled.  For composite-run-steps actions this is typically empty.
       build-command: ''
+
+  test:
+    runs-on: ubuntu-latest
+
+    env:
+      # NOTE:  These three releases have been created in this action's repository to test with.
+      #        If they are removed or updated, these tests will fail.
+      EXISTING_BRANCH: 'main'
+      EXISTING_TAG: 'v1.2.1'
+      EXISTING_SHA: 'd1646b13d2370437f7ca85233d340cb2e15b74c7'
+      NONEXISTENT_REF: 'v304.973.444'
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      #--------------------------------------
+      # EXISTING BRANCH REF
+      #--------------------------------------
+      - name: '-------------------------------------------------------------------------------------------------------'
+        run: echo ""
+      
+      - name: When validating an existing branch (${{ env.EXISTING_BRANCH}})
+        uses: ./
+        if: always()
+        id: existing-branch
+        with:
+          branch-tag-sha: ${{ env.EXISTING_BRANCH }}
+          throw-errors: true
+
+      - name: Then the outcome should be success
+        if: always()
+        run: ./test/assert-values-match.sh --name "step outcome" --expected "success" --actual "${{ steps.existing-branch.outcome }}"
+
+      - name: And the REF_EXISTS output should be true
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_EXISTS" --expected "true" --actual "${{ steps.existing-branch.outputs.REF_EXISTS }}"
+      
+      - name: And the REF_TYPE output should be branch
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_TYPE" --expected "branch" --actual "${{ steps.existing-branch.outputs.REF_TYPE }}"
+
+
+      #--------------------------------------
+      # EXISTING TAG REF
+      #--------------------------------------
+      - name: '-------------------------------------------------------------------------------------------------------'
+        run: echo ""
+      
+      - name: When validating an existing tag (${{ env.EXISTING_TAG}})
+        uses: ./
+        if: always()
+        id: existing-tag
+        with:
+          branch-tag-sha: ${{ env.EXISTING_TAG }}
+          throw-errors: true
+
+      - name: Then the outcome should be success
+        if: always()
+        run: ./test/assert-values-match.sh --name "step outcome" --expected "success" --actual "${{ steps.existing-tag.outcome }}"
+
+      - name: And the REF_EXISTS output should be true
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_EXISTS" --expected "true" --actual "${{ steps.existing-tag.outputs.REF_EXISTS }}"
+      
+      - name: And the REF_TYPE output should be tag
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_TYPE" --expected "tag" --actual "${{ steps.existing-tag.outputs.REF_TYPE }}"
+
+      #--------------------------------------
+      # EXISTING SHA REF
+      #--------------------------------------
+      - name: '-------------------------------------------------------------------------------------------------------'
+        run: echo ""
+      
+      - name: When validating an existing sha (${{ env.EXISTING_SHA}})
+        uses: ./
+        if: always()
+        id: existing-sha
+        with:
+          branch-tag-sha: ${{ env.EXISTING_SHA }}
+          throw-errors: true
+
+      - name: Then the outcome should be success
+        if: always()
+        run: ./test/assert-values-match.sh --name "step outcome" --expected "success" --actual "${{ steps.existing-sha.outcome }}"
+
+      - name: And the REF_EXISTS output should be true
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_EXISTS" --expected "true" --actual "${{ steps.existing-sha.outputs.REF_EXISTS }}"
+      
+      - name: And the REF_TYPE output should be sha
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_TYPE" --expected "sha" --actual "${{ steps.existing-sha.outputs.REF_TYPE }}"
+
+      #-------------------------------------------------
+      # REF DOES NOT EXIST WITH THROW-ERROR SET TO FALSE
+      #-------------------------------------------------
+      - name: '-------------------------------------------------------------------------------------------------------'
+        run: echo ""
+      
+      - name: When validating an non-existent ref (${{ env.NONEXISTENT_REF}}) and throw-errors is false
+        uses: ./
+        if: always()
+        id: nonexistent-ref-no-errors
+        with:
+          branch-tag-sha: ${{ env.NONEXISTENT_REF }}
+          throw-errors: false
+
+      - name: Then the outcome should be success
+        if: always()
+        run: ./test/assert-values-match.sh --name "step outcome" --expected "success" --actual "${{ steps.nonexistent-ref-no-errors.outcome }}"
+
+      - name: And the REF_EXISTS output should be false
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_EXISTS" --expected "false" --actual "${{ steps.nonexistent-ref-no-errors.outputs.REF_EXISTS }}"
+      
+      - name: And the REF_TYPE output should be unknown
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_TYPE" --expected "unknown" --actual "${{ steps.nonexistent-ref-no-errors.outputs.REF_TYPE }}"
+
+      #-------------------------------------------------
+      # REF DOES NOT EXIST WITH THROW-ERROR SET TO TRUE
+      #-------------------------------------------------
+      - name: '-------------------------------------------------------------------------------------------------------'
+        run: echo ""
+      
+      - name: When validating an non-existent ref (${{ env.NONEXISTENT_REF}}) and throw-errors is true
+        uses: ./
+        if: always()
+        id: nonexistent-ref-with-errors
+        with:
+          branch-tag-sha: ${{ env.NONEXISTENT_REF }}
+          throw-errors: true
+
+      - name: Then the outcome should be failure
+        if: always()
+        run: ./test/assert-values-match.sh --name "step outcome" --expected "failure" --actual "${{ steps.nonexistent-ref-with-errors.outcome }}"
+
+      - name: And the REF_EXISTS output should be false
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_EXISTS" --expected "false" --actual "${{ steps.nonexistent-ref-with-errors.outputs.REF_EXISTS }}"
+      
+      - name: And the REF_TYPE output should be unknown
+        if: always()
+        run: ./test/assert-values-match.sh --name "REF_TYPE" --expected "unknown" --actual "${{ steps.nonexistent-ref-with-errors.outputs.REF_TYPE }}"
+
+      - name: '-------------------------------------------------------------------------------------------------------'
+        run: echo ""
\ No newline at end of file
diff --git a/test/assert-values-match.sh b/test/assert-values-match.sh
new file mode 100755
index 0000000..147b626
--- /dev/null
+++ b/test/assert-values-match.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+name=''
+expectedValue=''
+actualValue=''
+
+for arg in "$@"; do
+    case $arg in
+    --name)
+        name=$2
+        shift # Remove argument --name from `$@`
+        shift # Remove argument value from `$@`
+        ;;
+    --expected)
+        expectedValue=$2
+        shift # Remove argument --expected from `$@`
+        shift # Remove argument value from `$@`
+        ;;
+    --actual)
+        actualValue=$2
+        shift # Remove argument --actual from `$@`
+        shift # Remove argument value from `$@`
+        ;;
+    
+    esac
+done
+
+echo "
+Expected $name: '$expectedValue'"
+echo "Actual $name:   '$actualValue'"
+
+if [ "$expectedValue" != "$actualValue" ]; then
+  echo "The expected $name does not match the actual $name."  
+  exit 1
+else 
+  echo "The expected and actual $name values match."
+fi
\ No newline at end of file