improve example and add tests

Author: codetent

.devcontainer/devcontainer.json

@@ -1,5 +1,5 @@
 {
-    "image": "ghcr.io/codetent/confless/dev:sha-382640a",
+    "image": "ghcr.io/codetent/confless/dev:sha-6fd6dc8",
     "runArgs": [
         "--platform=linux/amd64"
     ],

.github/workflows/check.yml

@@ -13,7 +13,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/codetent/confless/dev:sha-382640a
+      image: ghcr.io/codetent/confless/dev:sha-6fd6dc8
       env:
         GOFLAGS: -buildvcs=false
     steps:

Taskfile.yml

@@ -1,9 +1,15 @@
 version: '3'
 
+includes:
+  examples:
+    dir: examples
+    taskfile: examples/Taskfile.yml
+
 tasks:
   test:
     cmds:
-      - go test -v ./...
+      - gotestsum --format testdox
+      - task: examples:test
 
   lint:
     cmds:

example/config.json

@@ -0,0 +1,17 @@
+version: '3'
+
+tasks:
+  test:
+    cmds:
+      - cmd: |
+          cd {{ .ITEM.dir }} &&
+          {{ .ITEM.cmd }} | jd {{ .ITEM.expected }}
+        for:
+          - dir: simple
+            cmd: >-
+              APP_DATABASE_USERNAME=user
+              APP_DATABASE_PASSWORD=pass
+              go run main.go
+              --debug
+              --config=files/override.yaml
+            expected: expected.json

example/main.go

@@ -0,0 +1,13 @@
+{
+    "name": "app",
+    "host": "0.0.0.0",
+    "port": 8080,
+    "debug": true,
+    "database": {
+        "host": "db.example.com",
+        "port": 5432,
+        "username": "user",
+        "password": "pass"
+    },
+    "Config": "files/override.yaml"
+}

example/other.json

@@ -0,0 +1,5 @@
+{
+  "name": "app",
+  "host": "0.0.0.0",
+  "port": 8080
+}

examples/Taskfile.yml

@@ -0,0 +1,4 @@
+database:
+  host: db.example.com
+  port: 5432
+  ssl: true