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+// Test alignment.
+
+--- align-right ---
+// Test ragged-left.
+#set align(right)
+To the right! Where the sunlight peeks behind the mountain.
+
+--- align-in-stack ---
+#set page(height: 100pt)
+#stack(dir: ltr,
+  align(left, square(size: 15pt, fill: eastern)),
+  align(center, square(size: 20pt, fill: eastern)),
+  align(right, square(size: 15pt, fill: eastern)),
+)
+#align(center + horizon, rect(fill: eastern, height: 10pt))
+#align(bottom, stack(
+  align(center, rect(fill: conifer, height: 10pt)),
+  rect(fill: forest, height: 10pt, width: 100%),
+))
+
+--- align-center-in-flow ---
+// Test that multiple paragraphs in subflow also respect alignment.
+#align(center)[
+  Lorem Ipsum
+
+  Dolor
+]
+
+--- align-start-and-end ---
+// Test start and end alignment.
+#rotate(-30deg, origin: end + horizon)[Hello]
+
+#set text(lang: "de")
+#align(start)[Start]
+#align(end)[Ende]
+
+#set text(lang: "ar")
+#align(start)[يبدأ]
+#align(end)[نهاية]
+
+--- alignment-fields-x ---
+// Test 2d alignment 'horizontal' field.
+#test((start + top).x, start)
+#test((end + top).x, end)
+#test((left + top).x, left)
+#test((right + top).x, right)
+#test((center + top).x, center)
+#test((start + bottom).x, start)
+#test((end + bottom).x, end)
+#test((left + bottom).x, left)
+#test((right + bottom).x, right)
+#test((center + bottom).x, center)
+#test((start + horizon).x, start)
+#test((end + horizon).x, end)
+#test((left + horizon).x, left)
+#test((right + horizon).x, right)
+#test((center + horizon).x, center)
+#test((top + start).x, start)
+#test((bottom + end).x, end)
+#test((horizon + center).x, center)
+
+--- alignment-fields-y ---
+// Test 2d alignment 'vertical' field.
+#test((start + top).y, top)
+#test((end + top).y, top)
+#test((left + top).y, top)
+#test((right + top).y, top)
+#test((center + top).y, top)
+#test((start + bottom).y, bottom)
+#test((end + bottom).y, bottom)
+#test((left + bottom).y, bottom)
+#test((right + bottom).y, bottom)
+#test((center + bottom).y, bottom)
+#test((start + horizon).y, horizon)
+#test((end + horizon).y, horizon)
+#test((left + horizon).y, horizon)
+#test((right + horizon).y, horizon)
+#test((center + horizon).y, horizon)
+#test((top + start).y, top)
+#test((bottom + end).y, bottom)
+#test((horizon + center).y, horizon)
+
+--- alignment-type ---
+#test(type(center), alignment)
+#test(type(horizon), alignment)
+#test(type(center + horizon), alignment)
+
+--- alignment-axis ---
+// Test alignment methods.
+#test(start.axis(), "horizontal")
+#test(end.axis(), "horizontal")
+#test(left.axis(), "horizontal")
+#test(right.axis(), "horizontal")
+#test(center.axis(), "horizontal")
+#test(top.axis(), "vertical")
+#test(bottom.axis(), "vertical")
+#test(horizon.axis(), "vertical")
+
+--- alignment-inv ---
+#test(start.inv(), end)
+#test(end.inv(), start)
+#test(left.inv(), right)
+#test(right.inv(), left)
+#test(center.inv(), center)
+#test(top.inv(), bottom)
+#test(bottom.inv(), top)
+#test(horizon.inv(), horizon)
+#test((start + top).inv(), (end + bottom))
+#test((end + top).inv(), (start + bottom))
+#test((left + top).inv(), (right + bottom))
+#test((right + top).inv(), (left + bottom))
+#test((center + top).inv(), (center + bottom))
+#test((start + bottom).inv(), (end + top))
+#test((end + bottom).inv(), (start + top))
+#test((left + bottom).inv(), (right + top))
+#test((right + bottom).inv(), (left + top))
+#test((center + bottom).inv(), (center + top))
+#test((start + horizon).inv(), (end + horizon))
+#test((end + horizon).inv(), (start + horizon))
+#test((left + horizon).inv(), (right + horizon))
+#test((right + horizon).inv(), (left + horizon))
+#test((center + horizon).inv(), (center + horizon))
+#test((top + start).inv(), (end + bottom))
+#test((bottom + end).inv(), (start + top))
+#test((horizon + center).inv(), (center + horizon))
+
+--- alignment-add-two-horizontal ---
+// Error: 8-22 cannot add two horizontal alignments
+#align(center + right, [A])
+
+--- alignment-add-two-vertical ---
+// Error: 8-20 cannot add two vertical alignments
+#align(top + bottom, [A])
+
+--- alignment-add-vertical-and-2d ---
+// Error: 8-30 cannot add a vertical and a 2D alignment
+#align(top + (bottom + right), [A])
+
+--- issue-1398-line-align ---
+// Test right-aligning a line and a rectangle.
+#align(right, line(length: 30%))
+#align(right, rect())