squash merge from dev branch

vendor/gopkg.in/alecthomas/kingpin.v2/completions_test.go

@@ -0,0 +1,78 @@
+package kingpin
+
+import (
+	"testing"
+
+	"github.com/alecthomas/assert"
+)
+
+func TestResolveWithBuiltin(t *testing.T) {
+	a := completionsMixin{}
+
+	hintAction1 := func() []string {
+		return []string{"opt1", "opt2"}
+	}
+	hintAction2 := func() []string {
+		return []string{"opt3", "opt4"}
+	}
+
+	a.builtinHintActions = []HintAction{hintAction1, hintAction2}
+
+	args := a.resolveCompletions()
+	assert.Equal(t, []string{"opt1", "opt2", "opt3", "opt4"}, args)
+}
+
+func TestResolveWithUser(t *testing.T) {
+	a := completionsMixin{}
+	hintAction1 := func() []string {
+		return []string{"opt1", "opt2"}
+	}
+	hintAction2 := func() []string {
+		return []string{"opt3", "opt4"}
+	}
+
+	a.hintActions = []HintAction{hintAction1, hintAction2}
+
+	args := a.resolveCompletions()
+	assert.Equal(t, []string{"opt1", "opt2", "opt3", "opt4"}, args)
+}
+
+func TestResolveWithCombination(t *testing.T) {
+	a := completionsMixin{}
+	builtin := func() []string {
+		return []string{"opt1", "opt2"}
+	}
+	user := func() []string {
+		return []string{"opt3", "opt4"}
+	}
+
+	a.builtinHintActions = []HintAction{builtin}
+	a.hintActions = []HintAction{user}
+
+	args := a.resolveCompletions()
+	// User provided args take preference over builtin (enum-defined) args.
+	assert.Equal(t, []string{"opt3", "opt4"}, args)
+}
+
+func TestAddHintAction(t *testing.T) {
+	a := completionsMixin{}
+	hintFunc := func() []string {
+		return []string{"opt1", "opt2"}
+	}
+	a.addHintAction(hintFunc)
+
+	args := a.resolveCompletions()
+	assert.Equal(t, []string{"opt1", "opt2"}, args)
+}
+
+func TestAddHintActionBuiltin(t *testing.T) {
+	a := completionsMixin{}
+	hintFunc := func() []string {
+		return []string{"opt1", "opt2"}
+	}
+
+	a.addHintActionBuiltin(hintFunc)
+
+	args := a.resolveCompletions()
+	assert.Equal(t, []string{"opt1", "opt2"}, args)
+}