Adding codecov (#6)

Also pulling in latest changes from Hardfin internal (just an upgrade to Go 1.22.1)

.github/workflows/ci.yaml

@@ -26,15 +26,18 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
+env:
+  GO_LATEST: "1.22.1"
+
 jobs:
   go-test:
     runs-on:
       - ubuntu-22.04
     strategy:
       matrix:
         go-version:
-          - "1.21.7"
-          - "1.22.0"
+          - "1.21.8"
+          - "go-latest"
     timeout-minutes: 5
 
     steps:
@@ -44,14 +47,21 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: ${{ matrix.go-version }}
+          go-version: ${{ matrix.go-version == 'go-latest' && env.GO_LATEST || matrix.go-version }}
 
       - name: Go test
         run: |
-          go test ./...
+          go test -race -covermode=atomic -coverprofile=coverage.out ./...
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@3cfe3a4abbb849e10058ce4af15d205b6da42804 # v4.0.0
         with:
           version: v1.56.1
           args: "--verbose --timeout=2m"
+
+      - name: Upload coverage reports to Codecov
+        if: ${{ matrix.go-version == 'go-latest' }}
+        uses: codecov/codecov-action@54bcd8715eee62d40e33596ef5e8f0f48dbbccab # v4.1.0
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: hardfinhq/go-date

go.mod

@@ -1,6 +1,6 @@
 module github.com/hardfinhq/go-date
 
-go 1.21.4
+go 1.22.1
 
 require github.com/stretchr/testify v1.9.0
 

time_vendor.go

@@ -19,7 +19,7 @@ import (
 )
 
 // daysBefore is vendored in from the standard library:
-// https://github.com/golang/go/blob/go1.21.4/src/time/time.go#L1039-L1056
+// https://github.com/golang/go/blob/go1.22.1/src/time/time.go#L1060-L1077
 var daysBefore = [...]int32{
 	0,
 	31,
@@ -37,7 +37,7 @@ var daysBefore = [...]int32{
 }
 
 // daysIn is vendored in from the standard library:
-// https://github.com/golang/go/blob/go1.21.4/src/time/time.go#L1058-L1063
+// https://github.com/golang/go/blob/go1.22.1/src/time/time.go#L1079-L1084
 func daysIn(m time.Month, year int) int {
 	if m == time.February && isLeap(year) {
 		return 29
@@ -46,7 +46,7 @@ func daysIn(m time.Month, year int) int {
 }
 
 // isLeap is vendored in from the standard library:
-// https://github.com/golang/go/blob/go1.21.4/src/time/time.go#L1427-L1429
+// https://github.com/golang/go/blob/go1.22.1/src/time/time.go#L1448-L1450
 func isLeap(year int) bool {
 	return year%4 == 0 && (year%100 != 0 || year%400 == 0)
 }