test(tests/test_object.py): 添加对Line的测试

tests/test_object.py

@@ -0,0 +1,24 @@
+# import sys
+
+# sys.path.append('/home/songsenand/Project/ToyDesigner/')
+
+from toydesigner.objects import *
+
+
+def test_line():
+    line1 = Line((1, 3), (1, 4))
+    assert line1.slope() == float("inf")
+    assert line1.y_intercept() == 0
+    line2 = Line((1, 1), (2, 2))
+    assert line2.slope() == 1
+    assert line2.y_intercept() == 0
+    assert line2.equation() == "y = 1.0x"
+    line3 = Line((37, 5), (7, 29))
+    assert line3.slope() == -0.8
+    assert line3.y_intercept() == 34.6
+    assert line3.equation() == "y = -0.8x + 34.6"
+    assert (12, 25) in line3
+    assert (12, 12) not in line3
+    assert (3, 32.2) not in line3
+    assert line3.contains((6, 29.8), allow_on_extended=True) == True
+    assert line3.length()**2 == (37 - 7) ** 2 + (5 - 29) ** 2