Add tests for parse-legacy-file, to ensure the right version is selected (#89)

* Add tests for legacy version parser

* Unsure how this ever worked before?

Fix a weird flub I can’t explain.

This can probably be fixup’ed into some other commit, but I’m using the web app, so, this is difficult

.github/workflows/main.yml

@@ -2,7 +2,7 @@ name: CI
 on:
   # Triggers the workflow on push or pull request events but only for the master branch
   push:
-  
+
   pull_request:
 
   # Allows you to run this workflow manually from the Actions tab
@@ -20,7 +20,20 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Test plugin
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: 🏗️ Create dummy install directories
+        run: |
+          ./test-fixtures/create-dummy-installs.sh
+
+      - name: Test parsing 'go.mod'
+        run: |
+          bin/parse-legacy-file test-fixtures/go.mod | grep "^1.19.3"
+      - name: Test parsing '.go-version'
+        run: |
+          bin/parse-legacy-file test-fixtures/.go-version | grep "^1.17.13"
+      - name: Test plugin works to get latest version
         uses: asdf-vm/actions/plugin-test@v1
         with:
           command: go version

test-fixtures/.go-version

@@ -0,0 +1 @@
+1.17.13

test-fixtures/create-dummy-installs.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+declare -a fake_install_versions=(
+    1.16
+    1.17.1
+    1.17.7
+    1.17.13
+    1.18.1
+    1.18.2
+    1.18.6
+    1.19
+    1.19.3
+)
+
+mkdir -p ../../installs/asdf-golang
+for version in "${fake_install_versions[@]}"; do
+    mkdir "../../installs/asdf-golang/${version}"
+done

test-fixtures/go.mod

@@ -0,0 +1,3 @@
+module github.com/kennyp/asdf-golang
+
+go 1.18