Remove misleading test cases and improve docs

Author: gvalkov

docs/reference/pip_install.rst

@@ -116,9 +116,17 @@ script as:
 
    python setup.py --no-user-cfg install --prefix='/usr/local' --no-compile
 
-Note that the correct way of giving more than one option to
-``setup.py`` is through multiple ``--global-option`` and
-``--install-option`` options, as shown in the example above.
+Note that the only way of giving more than one option to ``setup.py``
+is through multiple ``--global-option`` and ``--install-option``
+options, as shown in the example above. The value of each option is
+passed as a single argument to the ``setup.py`` script. Therefore, a
+line such as the following is invalid and would result in an
+installation error.
+
+::
+
+   # Invalid. Please use '--install-option' twice as shown above.
+   FooProject >= 1.2 --install-option="--prefix=/usr/local --no-compile"
 
 
 .. _`Pre Release Versions`:

tests/functional/test_install_reqs.py

@@ -127,14 +127,18 @@ def getsetuppyargs(contents):
         return json.load(open(setuppyargs_file))
 
     reqfile = '''
-    setuppyargs==1.0 --global-option="--one --two" \\
-                     --global-option="--three" \\
-                     --install-option "--four -5" \\
-                     --install-option="-6"
+    setuppyargs==1.0 --global-option="--onetwo"  \\
+                     --global-option="--three"   \\
+                     --install-option "--four-5" \\
+                     --install-option="-6" \\
+                     --install-option="--opt-with-ws=a b c"
     '''
 
     args = getsetuppyargs(reqfile)
-    expected = set(['--one --two', '--three', '--four -5', '-6'])
+    expected = set([
+        '--onetwo', '--three',
+        '--four-5', '-6', '--opt-with-ws=a b c'
+    ])
     assert expected.issubset(set(args))
 
 

tests/unit/test_req.py

@@ -554,29 +554,31 @@ def test_parse_flags_from_requirements(finder):
 
 
 def test_get_requirement_options():
-    res = parse_requirement_options('--install-option="--abc --zxc"')
-    assert res == {'install_options': ['--abc --zxc']}
-
     res = parse_requirement_options('--global-option "--abc"')
     assert res == {'global_options': ['--abc']}
 
+    # Note the '--arg-with-spaces=a b c' is passed as a single
+    # argument to setup.py.
+    res = parse_requirement_options('--install-option="--opt-spaces=a b c"')
+    assert res == {'install_options': ['--opt-spaces=a b c']}
+
     line = (
         'INITools==2.0 '
-        '--global-option="--one --two -3" '
+        '--global-option="--one --two=3 3.5" '
         '--global-option="--four" '
         '--install-option="--prefix=/opt" '
         '--install-option="--help" '
     )
     assert parse_line(line) == (REQUIREMENT, (
         'INITools==2.0', {
-            'global_options': ['--one --two -3', '--four'],
+            'global_options': ['--one --two=3 3.5', '--four'],
             'install_options': ['--prefix=/opt', '--help'],
         }))
 
 
 def test_install_requirements_with_options(tmpdir, finder, session):
     content = '''
-    INITools == 2.0 --global-option="--one --two -3" \
+    INITools == 2.0 --global-option="--one-two-3" \
                     --install-option "--prefix=/opt"
     '''
 
@@ -594,7 +596,7 @@ def test_install_requirements_with_options(tmpdir, finder, session):
             pass
 
         call = popen.call_args_list[0][0][0]
-        for i in '--one --two -3', '--prefix=/opt':
+        for i in '--one-two-3', '--prefix=/opt':
             assert i in call
 
     # TODO: assert that --global-option come before --install-option.