v0.2 Preview: Construction Plan.

backend/latex_lab/test_views.py

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+from latex_lab.views import ExerciseSubmitView
+
+
+def test_normalize_忽略公式结构外的空白():
+    left = ExerciseSubmitView.normalize(r"\frac { a } { b }")
+    right = ExerciseSubmitView.normalize(r"\frac{a}{b}")
+
+    assert left == right
+
+
+def test_normalize_保留_text_命令内部的语义空格():
+    with_space = ExerciseSubmitView.normalize(r"\text{a b}")
+    without_space = ExerciseSubmitView.normalize(r"\text{ab}")
+
+    assert with_space != without_space