Start adding tests for inputtransformer2

IPython/core/tests/test_inputtransformer2.py

@@ -0,0 +1,37
+import nose.tools as nt
+
+from IPython.core import inputtransformer2
+from IPython.core.inputtransformer2 import make_tokens_by_line
+
+MULTILINE_MAGIC_ASSIGN = ("""\
+a = f()
+b = %foo \\
+  bar
+g()
+""".splitlines(keepends=True), """\
+a = f()
+b = get_ipython().run_line_magic('foo', '   bar')
+g()
+""".splitlines(keepends=True))
+
+MULTILINE_SYSTEM_ASSIGN = ("""\
+a = f()
+b = !foo \\
+  bar
+g()
+""".splitlines(keepends=True), """\
+a = f()
+b = get_ipython().getoutput('foo   bar')
+g()
+""".splitlines(keepends=True))
+
+def test_find_assign_magic():
+    tbl = make_tokens_by_line(MULTILINE_MAGIC_ASSIGN[0])
+    nt.assert_equal(inputtransformer2.MagicAssign.find(tbl), (2, 4))
+
+    tbl = make_tokens_by_line(MULTILINE_SYSTEM_ASSIGN[0]) # Nothing to find
+    nt.assert_equal(inputtransformer2.MagicAssign.find(tbl), None)
+
+def test_transform_assign_magic():
+    res = inputtransformer2.MagicAssign.transform(MULTILINE_MAGIC_ASSIGN[0], (2, 4))
+    nt.assert_equal(res, MULTILINE_MAGIC_ASSIGN[1])