tests: Add some tests to improve coverage.

tests/basics/builtin_ellipsis.py

@@ -0,0 +1,6 @@
+# tests that .../Ellipsis exists
+
+print(...)
+print(Ellipsis)
+
+print(... == Ellipsis)

tests/basics/fun_largestate.py

@@ -1,5 +1,6 @@
 # test large function (stack) state
 
+# this function creates 127 locals
 def f():
     x0 = 1
     x1 = 1
@@ -128,10 +129,31 @@ def f():
     x124 = 1
     x125 = 1
     x126 = 1
-
 f()
 
+# this function pushes 128 elements onto the function stack
 def g():
     x = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,]
-
 g()
+
+# this function exercises load_fast_n and store_fast_n opcodes
+def h():
+    x0 = 1
+    x1 = x0
+    x2 = x1
+    x3 = x2
+    x4 = x3
+    x5 = x4
+    x6 = x5
+    x7 = x6
+    x8 = x7
+    x9 = x8
+    x10 = x9
+    x11 = x10
+    x12 = x11
+    x13 = x12
+    x14 = x13
+    x15 = x14
+    x16 = x15
+    x17 = x16
+h()

tests/basics/list_slice.py

@@ -16,3 +16,7 @@ print(x[a::])
 print(x[a:b])
 print(x[a:b:])
 #print(x[a:b:c])
+
+# these should not raise IndexError
+print([][1:])
+print([][-1:])

tests/io/file_readline.py

@@ -0,0 +1,6 @@
+f = open("io/data/file1")
+print(f.readline())
+print(f.readline(3))
+print(f.readline(4))
+print(f.readline(5))
+print(f.readline())

tests/unicode/data/utf-8_2.txt

@@ -1 +1,2 @@
 aαbβcγdδ
+ぁ🙐

tests/unicode/file2.py

@@ -10,6 +10,16 @@ def do(mode):
     print(f.read(1))
     print(f.read(2))
     print(f.read(4))
+
+    # skip to end of line
+    f.readline()
+
+    # check 3-byte utf-8 char
+    print(f.read(1 if mode == 'rt' else 3))
+
+    # check 4-byte utf-8 char
+    print(f.read(1 if mode == 'rt' else 4))
+
     f.close()
 
 do('rb')