rewrite checkpoint

vendor/github.com/AlecAivazis/survey/survey_test.go

@@ -0,0 +1,118 @@
+package survey
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/AlecAivazis/survey/core"
+	"github.com/stretchr/testify/assert"
+)
+
+func init() {
+	// disable color output for all prompts to simplify testing
+	core.DisableColor = true
+}
+
+func TestValidationError(t *testing.T) {
+
+	err := fmt.Errorf("Football is not a valid month")
+
+	actual, err := core.RunTemplate(
+		core.ErrorTemplate,
+		err,
+	)
+	if err != nil {
+		t.Errorf("Failed to run template to format error: %s", err)
+	}
+
+	expected := `✘ Sorry, your reply was invalid: Football is not a valid month
+`
+
+	if actual != expected {
+		t.Errorf("Formatted error was not formatted correctly. Found:\n%s\nExpected:\n%s", actual, expected)
+	}
+}
+
+func TestAsk_returnsErrorIfTargetIsNil(t *testing.T) {
+	// pass an empty place to leave the answers
+	err := Ask([]*Question{}, nil)
+
+	// if we didn't get an error
+	if err == nil {
+		// the test failed
+		t.Error("Did not encounter error when asking with no where to record.")
+	}
+}
+
+func TestPagination_tooFew(t *testing.T) {
+	// a small list of options
+	choices := []string{"choice1", "choice2", "choice3"}
+
+	// a page bigger than the total number
+	pageSize := 4
+	// the current selection
+	sel := 3
+
+	// compute the page info
+	page, idx := paginate(pageSize, choices, sel)
+
+	// make sure we see the full list of options
+	assert.Equal(t, choices, page)
+	// with the second index highlighted (no change)
+	assert.Equal(t, 3, idx)
+}
+
+func TestPagination_firstHalf(t *testing.T) {
+	// the choices for the test
+	choices := []string{"choice1", "choice2", "choice3", "choice4", "choice5", "choice6"}
+
+	// section the choices into groups of 4 so the choice is somewhere in the middle
+	// to verify there is no displacement of the page
+	pageSize := 4
+	// test the second item
+	sel := 2
+
+	// compute the page info
+	page, idx := paginate(pageSize, choices, sel)
+
+	// we should see the first three options
+	assert.Equal(t, choices[0:4], page)
+	// with the second index highlighted
+	assert.Equal(t, 2, idx)
+}
+
+func TestPagination_middle(t *testing.T) {
+	// the choices for the test
+	choices := []string{"choice0", "choice1", "choice2", "choice3", "choice4", "choice5"}
+
+	// section the choices into groups of 3
+	pageSize := 2
+	// test the second item so that we can verify we are in the middle of the list
+	sel := 3
+
+	// compute the page info
+	page, idx := paginate(pageSize, choices, sel)
+
+	// we should see the first three options
+	assert.Equal(t, choices[2:4], page)
+	// with the second index highlighted
+	assert.Equal(t, 1, idx)
+}
+
+func TestPagination_lastHalf(t *testing.T) {
+	// the choices for the test
+	choices := []string{"choice0", "choice1", "choice2", "choice3", "choice4", "choice5"}
+
+	// section the choices into groups of 3
+	pageSize := 3
+	// test the last item to verify we're not in the middle
+	sel := 5
+
+	// compute the page info
+	page, idx := paginate(pageSize, choices, sel)
+
+	// we should see the first three options
+	assert.Equal(t, choices[3:6], page)
+	// we should be at the bottom of the list
+	assert.Equal(t, 2, idx)
+}