output: Add TestCanonical integration test

output/outputFormat_integration_test.go

@@ -0,0 +1,30 @@
+package output_test
+
+import (
+	"testing"
+
+	"github.com/gohugoio/hugo/hugolib"
+)
+
+func TestCanonical(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+[outputs]
+ home = ["notcanonical", "html", "rss"]
+
+[outputFormats]
+[outputFormats.notcanonical]
+mediaType = 'text/html'
+path = 'not'
+isHTML = true
+-- layouts/all.html --
+All. Canonical: {{ .OutputFormats.Canonical.RelPermalink }}.
+`
+
+	b := hugolib.Test(t, files)
+
+	b.AssertFileContent("public/not/index.html", "All. Canonical: /.")
+	b.AssertFileContent("public/index.html", "All. Canonical: /.")
+}