Add CI Workflow (#6)

Author: sgarcez

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.18.x]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Linting
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: latest
+      - name: test
+        run: go test -race ./...

.golangci.yml

@@ -0,0 +1,23 @@
+run:
+  tests: true
+
+linters:
+  enable:
+    - govet
+    - revive
+    - gofumpt
+    - gosec
+    - unparam
+    - goconst
+    - prealloc
+    - stylecheck
+    - unconvert
+    - errcheck
+    - deadcode
+    - ineffassign
+    - structcheck
+    - tparallel
+    - whitespace
+    - staticcheck
+    - gosimple
+    - gocritic

README.md

@@ -1,5 +1,9 @@
 # JoeJSON
 
+[![CI](https://github.com/sgarcez/joejson/actions/workflows/ci.yml/badge.svg)](https://github.com/sgarcez/joejson/actions?query=workflow%3Aci)
+[![Go Report Card](https://goreportcard.com/badge/github.com/sgarcez/joejson)](https://goreportcard.com/report/github.com/sgarcez/joejson)
+[![Go Reference](https://pkg.go.dev/badge/github.com/sgarcez/joejson.svg)](https://pkg.go.dev/github.com/sgarcez/joejson)
+
 A GeoJSON (RFC 7946) Go implementation.
 
 ## Features
@@ -18,4 +22,4 @@ A GeoJSON (RFC 7946) Go implementation.
     - [x] Polygon
     - [x] MultiPolygon
     - [x] GeometryCollection
-    - [ ] Validation (antimeridian crossing, right hand rule winding, etc)
+    - [ ] Validation (antimeridian crossing, right hand rule winding, etc)

feature.go

@@ -98,7 +98,7 @@ func (f Feature) WithPolygon(g Polygon) Feature {
 }
 
 // AsPolygon casts the Feature's Geometry to a Polygon.
-func (f *Feature) AsPolygon() (Polygon, bool) {
+func (f Feature) AsPolygon() (Polygon, bool) {
 	p, ok := f.geometry.(Polygon)
 	return p, ok
 }
@@ -110,7 +110,7 @@ func (f Feature) WithMultiPolygon(g MultiPolygon) Feature {
 }
 
 // AsMultiPolygon casts the Feature's Geometry to a MultiPolygon.
-func (f *Feature) AsMultiPolygon() (MultiPolygon, bool) {
+func (f Feature) AsMultiPolygon() (MultiPolygon, bool) {
 	p, ok := f.geometry.(MultiPolygon)
 	return p, ok
 }
@@ -122,7 +122,7 @@ func (f Feature) WithGeometryCollection(g GeometryCollection) Feature {
 }
 
 // AsGeometryCollection casts Feature's Geometry to a GeometryCollection.
-func (f *Feature) AsGeometryCollection() (GeometryCollection, bool) {
+func (f Feature) AsGeometryCollection() (GeometryCollection, bool) {
 	p, ok := f.geometry.(GeometryCollection)
 	return p, ok
 }

geometrycollection.go

@@ -121,10 +121,7 @@ func (g *GeometryCollectionMember) AsMultiPolygon() (MultiPolygon, bool) {
 
 // MarshalJSON is a custom JSON marshaller.
 func (g GeometryCollectionMember) MarshalJSON() ([]byte, error) {
-	switch v := g.geometry.(type) {
-	default:
-		return json.Marshal(v)
-	}
+	return json.Marshal(g.geometry)
 }
 
 // Type is the type of the Geometry.