Add some tests

Makefile

@@ -0,0 +1,17 @@
+test:
+	go test timshome.page/gilo/editor timshome.page/gilo/terminal
+
+coverage.out:
+	go test timshome.page/gilo/editor timshome.page/gilo/terminal -coverprofile=coverage.out
+
+coverage: coverage.out
+	go tool cover -html=coverage.out
+
+clean:
+	rm -f gilo
+	rm -f coverage.out
+
+gilo:
+	go build
+
+.PHONY: test clean

editor/fn_test.go

@@ -0,0 +1,75 @@
+package editor
+
+import (
+	"testing"
+)
+
+type isRune struct {
+	arg1 rune
+	expected bool
+}
+
+// (╯°□°）╯︵ ┻━┻
+var isAsciiTest = []isRune {
+	{'┻', false},
+	{'$', true},
+	{'︵', false},
+	{0x7f, true},
+}
+
+func TestIsAscii(t *testing.T) {
+	for _, test := range isAsciiTest {
+		if output := isAscii(test.arg1); output != test.expected {
+			t.Errorf("Output %v not equal to expected %v for input %q", output, test.expected, test.arg1)
+		}
+	}
+}
+
+var isCtrlTest = []isRune {
+	{0x78, false},
+	{0x7f, true},
+	{0x02, true},
+	{0x98, false},
+	{'a', false},
+}
+
+func TestIsCtrl(t *testing.T) {
+	for _, test := range isCtrlTest {
+		if output := isCtrl(test.arg1); output != test.expected {
+			t.Errorf("Output %v not equal to expected %v for input %q", output, test.expected, test.arg1)
+		}
+	}
+}
+
+func TestTruncateString(t *testing.T) {
+	firstString := "abcdefghijklmnopqrstuvwxyz"
+	truncated := truncateString(firstString, 13)
+
+	got := len(truncated)
+	want := 13
+
+	if got != want {
+		t.Errorf("Truncated length: %q, expected length: %q", got, want)
+	}
+}
+
+func TestTruncateStringNegative(t *testing.T) {
+	got := truncateString("fdlkjf", -5)
+	want := ""
+
+	if got != want {
+		t.Errorf("Truncated value: %q, expected value: %q", got, want)
+	}
+}
+
+func TestTruncateShorterString(t *testing.T) {
+	str := "abcdefg"
+
+	got := truncateString(str, 13)
+	want := str
+
+	if got != want {
+		t.Errorf("Truncated value: %q, expected value: %q", got, want)
+	}
+}
+

editor/row_test.go

@@ -0,0 +1,27 @@
+package editor
+
+import "testing"
+
+func TestNewRow(t *testing.T) {
+	str := "abcdefg"
+	row := NewRow(str)
+
+	got := string(row.chars)
+	want := str
+
+	if got != want {
+		t.Errorf("Row chars not equal to original string. Row: %q, String: %q", row, str)
+	}
+}
+
+func TestRowSize(t *testing.T) {
+	str := "abcdefg"
+	row := NewRow(str)
+
+	got := row.Size()
+	want := 7
+
+	if got != want {
+		t.Errorf("Row size not equal to number of runes in original string")
+	}
+}

terminal/ansi_test.go

@@ -0,0 +1,23 @@
+package terminal
+
+import "testing"
+
+func TestCode(t *testing.T) {
+	input := "H"
+
+	got := Code(input)
+	want := EscPrefix + input
+
+	if got != want {
+		t.Errorf("Failed to prefix %q with the escape prefix: %q", input, EscPrefix)
+	}
+}
+
+func TestMoveCursor(t *testing.T) {
+	got := MoveCursor(0, 0)
+	want := Code("%d;%dH", 1, 1)
+
+	if got != want {
+		t.Errorf("Failed to create escape sequence to move cursor")
+	}
+}