Update coverage in "pkg/templatelib" to 100%

Author: tianon

pkg/templatelib/lib_test.go

@@ -0,0 +1,45 @@
+package templatelib_test
+
+import (
+	"testing"
+	"text/template"
+	"unsafe"
+
+	"github.com/docker-library/go-dockerlibrary/pkg/templatelib"
+)
+
+func TestTernaryPanic(t *testing.T) {
+	// one of the only places template.IsTrue will return "false" for the "ok" value is an UnsafePointer (hence this test)
+
+	defer func() {
+		if r := recover(); r == nil {
+			t.Errorf("Expected panic, executed successfully instead")
+		} else if errText, ok := r.(string); !ok || errText != `template.IsTrue(<nil>) says things are NOT OK` {
+			t.Errorf("Unexpected panic: %v", errText)
+		}
+	}()
+
+	tmpl, err := template.New("unsafe-pointer").Funcs(templatelib.FuncMap).Parse(`{{ ternary "true" "false" . }}`)
+
+	err = tmpl.Execute(nil, unsafe.Pointer(uintptr(0)))
+	if err != nil {
+		t.Errorf("Expected panic, got error instead: %v", err)
+	}
+}
+
+func TestJoinPanic(t *testing.T) {
+	defer func() {
+		if r := recover(); r == nil {
+			t.Errorf("Expected panic, executed successfully instead")
+		} else if errText, ok := r.(string); !ok || errText != `"join" requires at least one argument` {
+			t.Errorf("Unexpected panic: %v", r)
+		}
+	}()
+
+	tmpl, err := template.New("join-no-arg").Funcs(templatelib.FuncMap).Parse(`{{ join }}`)
+
+	err = tmpl.Execute(nil, nil)
+	if err != nil {
+		t.Errorf("Expected panic, got error instead: %v", err)
+	}
+}