Add unit tests for HTTP dissector (#767)

* Add unit tests for HTTP dissector

* Ignore some fields on test environment

* Remove Git patches

* Don't have indent in the expected JSONs

* Fix more issues and update expected JSONs

* Refactor the test environment lookup

* Add a Makefile

* Include HTTP tests into the CI

* Fix the linting errors

* Fix another linting error

* Update the expected JSONs

* Sort `PostData.Params` params as well

* Move expected JSONs into `expect/dissect`

* Add `TestAnalyze` method

* Add `TestRepresent` method

* Add `TestRegister`, `TestMacros` and `TestPing` methods

* Test extensions first

* Remove expected JSONs

* Remove `bin` directory and update `Makefile` rules

* Update `.gitignore`

* Fix skipping download functionality in the Makefile

* Run `go mod tidy`

* Fix the race condition in the tests

* Revert "Test extensions first"

This reverts commit b8350cf139.

* Make `TEST_UPDATE` env lookup one-liner

* Update .github/workflows/test.yml

Co-authored-by: gadotroee <55343099+gadotroee@users.noreply.github.com>

* Add a newline

* Replace `ls` with `find`

Co-authored-by: gadotroee <55343099+gadotroee@users.noreply.github.com>

.github/workflows/test.yml

@@ -27,19 +27,31 @@ jobs:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2
 
-      - shell: bash
+      - name: Install libpcap
+        shell: bash
         run: |
           sudo apt-get install libpcap-dev
 
+      - id: 'auth'
+        uses: 'google-github-actions/auth@v0'
+        with:
+          credentials_json: '${{ secrets.GCR_JSON_KEY }}'
+
+      - name: 'Set up Cloud SDK'
+        uses: 'google-github-actions/setup-gcloud@v0'
+
       - name: CLI Test
         run: make test-cli
 
       - name: Agent Test
         run: make test-agent
-      
+
       - name: Shared Test
         run: make test-shared
 
+      - name: Extensions Test
+        run: make test-extensions
+
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v2