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108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
package m
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import (
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"testing"
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"gotest.tools/assert"
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)
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func testHorizontalCropping(t *testing.T, contents string, firstIndex int, lastIndex int, expected string) {
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screenLines := ScreenLines{width: 1 + lastIndex - firstIndex, leftColumnZeroBased: firstIndex}
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lineContents := NewLine(contents).HighlightedTokens(nil)
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screenLine := screenLines.createScreenLine(nil, 0, lineContents)
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assert.Equal(t, rowToString(screenLine), expected)
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}
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func TestCreateScreenLine(t *testing.T) {
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testHorizontalCropping(t, "abc", 0, 10, "abc")
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}
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func TestCreateScreenLineCanScrollLeft(t *testing.T) {
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testHorizontalCropping(t, "abc", 1, 10, "<c")
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}
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func TestCreateScreenLineCanScrollRight(t *testing.T) {
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testHorizontalCropping(t, "abc", 0, 1, "a>")
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}
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func TestCreateScreenLineCanAlmostScrollRight(t *testing.T) {
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testHorizontalCropping(t, "abc", 0, 2, "abc")
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}
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func TestCreateScreenLineCanScrollBoth(t *testing.T) {
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testHorizontalCropping(t, "abcde", 1, 3, "<c>")
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}
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func TestCreateScreenLineCanAlmostScrollBoth(t *testing.T) {
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testHorizontalCropping(t, "abcd", 1, 3, "<cd")
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}
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func TestEmpty(t *testing.T) {
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// This is what _GetLinesUnlocked() returns on no-lines-available
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inputLines := InputLines{
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lines: nil,
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firstLineOneBased: 0,
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}
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screenLines := ScreenLines{
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inputLines: &inputLines,
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height: 10,
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}
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rendered, firstScreenLine := screenLines.renderScreenLines()
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assert.Equal(t, len(rendered), 0)
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assert.Equal(t, firstScreenLine, 0)
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}
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func TestOverflowDown(t *testing.T) {
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// Set up a single line input
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line := Line{
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raw: "hej",
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}
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inputLines := InputLines{
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lines: []*Line{&line},
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firstLineOneBased: 1,
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}
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// Set up a single line screen
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screenLines := ScreenLines{
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inputLines: &inputLines,
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height: 1,
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width: 10, // Longer than the raw line, we're testing vertical overflow, not horizontal
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// This value can be anything and should be clipped, that's what we're testing
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firstInputLineOneBased: 42,
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}
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rendered, firstScreenLine := screenLines.renderScreenLines()
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assert.Equal(t, len(rendered), 1)
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assert.Equal(t, "hej", rowToString(rendered[0]))
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assert.Equal(t, firstScreenLine, 1)
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}
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func TestOverflowUp(t *testing.T) {
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// Set up a single line input
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line := Line{
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raw: "hej",
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}
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inputLines := InputLines{
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lines: []*Line{&line},
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firstLineOneBased: 1,
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}
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// Set up a single line screen
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screenLines := ScreenLines{
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inputLines: &inputLines,
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height: 1,
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width: 10, // Longer than the raw line, we're testing vertical overflow, not horizontal
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// This value can be anything and should be clipped, that's what we're testing
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firstInputLineOneBased: 0,
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}
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rendered, firstScreenLine := screenLines.renderScreenLines()
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assert.Equal(t, len(rendered), 1)
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assert.Equal(t, "hej", rowToString(rendered[0]))
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assert.Equal(t, firstScreenLine, 1)
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}
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