From f05ca49b390b1ce09b03b7923a66dda22b497dcb Mon Sep 17 00:00:00 2001
From: Ryan Plant <ryan@ryanplant.net>
Date: Mon, 22 Nov 2021 23:17:10 +1100
Subject: [PATCH] Fix JoinVertical behavior for non-edge non-center alignments

---
 join.go      |  4 ++--
 join_test.go | 21 +++++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 join_test.go

diff --git a/join.go b/join.go
index b96b7f0d..69ffdc9d 100644
--- a/join.go
+++ b/join.go
@@ -157,8 +157,8 @@ func JoinVertical(pos Position, strs ...string) string {
 				}
 
 				split := int(math.Round(float64(w) * pos.value()))
-				left := w - split
-				right := w - left
+				right := w - split
+				left := w - right
 
 				b.WriteString(strings.Repeat(" ", left))
 				b.WriteString(line)
diff --git a/join_test.go b/join_test.go
new file mode 100644
index 00000000..813280de
--- /dev/null
+++ b/join_test.go
@@ -0,0 +1,21 @@
+package lipgloss
+
+import "testing"
+
+func TestJoinVertical(t *testing.T) {
+	type test struct {
+		result   string
+		expected string
+	}
+	tests := []test{
+		{JoinVertical(0, "A", "BBBB"), "A   \nBBBB"},
+		{JoinVertical(1, "A", "BBBB"), "   A\nBBBB"},
+		{JoinVertical(0.25, "A", "BBBB"), " A  \nBBBB"},
+	}
+
+	for _, test := range tests {
+		if test.result != test.expected {
+			t.Errorf("Got \n%s\n, expected \n%s\n", test.result, test.expected)
+		}
+	}
+}