Complete test suite overhaul.

* rename a few test modules to make the names more consistent

* do not copy/use Sphinx from build/ (unnecessary without 2to3)

* use a temporary dir for *all* test projects, the source tree
  will stay pristine that way  (default is tests/build)

* speed up tests by ~3x by splitting up test projects and avoiding
  rebuilds

tests/test_build_text.py

@@ -18,29 +18,16 @@ from util import with_app
 def with_text_app(*args, **kw):
     default_kw = {
         'buildername': 'text',
-        'srcdir': '(empty)',
-        'confoverrides': {
-            'project': 'text',
-            'master_doc': 'contents',
-        },
+        'testroot': 'build-text',
     }
     default_kw.update(kw)
     return with_app(*args, **default_kw)
 
 
 @with_text_app()
-def test_maxwitdh_with_prefix(app):
-    long_string = u' '.join([u"ham"] * 30)
-    contents = (
-            u".. seealso:: %(long_string)s\n\n"
-            u"* %(long_string)s\n"
-            u"* %(long_string)s\n"
-            u"\nspam egg\n"
-            ) % locals()
-
-    (app.srcdir / 'contents.rst').write_text(contents, encoding='utf-8')
-    app.builder.build_all()
-    result = (app.outdir / 'contents.txt').text(encoding='utf-8')
+def test_maxwitdh_with_prefix(app, status, warning):
+    app.builder.build_update()
+    result = (app.outdir / 'maxwidth.txt').text(encoding='utf-8')
 
     lines = result.splitlines()
     line_widths = [column_width(line) for line in lines]
@@ -58,105 +45,52 @@ def test_maxwitdh_with_prefix(app):
 
 
 @with_text_app()
-def test_lineblock(app):
+def test_lineblock(app, status, warning):
     # regression test for #1109: need empty line after line block
-    contents = (
-            u"* one\n"
-            u"\n"
-            u"  | line-block 1\n"
-            u"  | line-block 2\n"
-            u"\n"
-            u"followed paragraph.\n"
-            )
-
-    (app.srcdir / 'contents.rst').write_text(contents, encoding='utf-8')
-    app.builder.build_all()
-    result = (app.outdir / 'contents.txt').text(encoding='utf-8')
-
+    app.builder.build_update()
+    result = (app.outdir / 'lineblock.txt').text(encoding='utf-8')
     expect = (
-            u"* one\n"
-            u"\n"
-            u"     line-block 1\n"
-            u"     line-block 2\n"
-            u"\n"
-            u"followed paragraph.\n"
-            )
-
+        u"* one\n"
+        u"\n"
+        u"     line-block 1\n"
+        u"     line-block 2\n"
+        u"\n"
+        u"followed paragraph.\n"
+    )
     assert result == expect
 
 
 @with_text_app()
-def test_nonascii_title_line(app):
-    title = u'\u65e5\u672c\u8a9e'
-    underline = u'=' * column_width(title)
-    content = u'\n'.join((title, underline, u''))
-
-    (app.srcdir / 'contents.rst').write_text(content, encoding='utf-8')
-    app.builder.build_all()
-    result = (app.outdir / 'contents.txt').text(encoding='utf-8')
-
-    expect_underline = underline.replace('=', '*')
+def test_nonascii_title_line(app, status, warning):
+    app.builder.build_update()
+    result = (app.outdir / 'nonascii_title.txt').text(encoding='utf-8')
+    expect_underline = '******'
     result_underline = result.splitlines()[2].strip()
     assert expect_underline == result_underline
 
 
 @with_text_app()
-def test_nonascii_table(app):
-    text = u'\u65e5\u672c\u8a9e'
-    contents = (u"\n.. list-table::"
-                 "\n"
-                 "\n   - - spam"
-                 "\n     - egg"
-                 "\n"
-                 "\n   - - %(text)s"
-                 "\n     - %(text)s"
-                 "\n" % locals())
-
-    (app.srcdir / 'contents.rst').write_text(contents, encoding='utf-8')
-    app.builder.build_all()
-    result = (app.outdir / 'contents.txt').text(encoding='utf-8')
-
+def test_nonascii_table(app, status, warning):
+    app.builder.build_update()
+    result = (app.outdir / 'nonascii_table.txt').text(encoding='utf-8')
     lines = [line.strip() for line in result.splitlines() if line.strip()]
     line_widths = [column_width(line) for line in lines]
     assert len(set(line_widths)) == 1  # same widths
 
 
 @with_text_app()
-def test_nonascii_maxwidth(app):
-    sb_text = u'abc'  #length=3
-    mb_text = u'\u65e5\u672c\u8a9e'  #length=3
-
-    sb_line = ' '.join([sb_text] * int(MAXWIDTH / 3))
-    mb_line = ' '.join([mb_text] * int(MAXWIDTH / 3))
-    mix_line = ' '.join([sb_text, mb_text] * int(MAXWIDTH / 6))
-
-    contents = u'\n\n'.join((sb_line, mb_line, mix_line))
-
-    (app.srcdir / 'contents.rst').write_text(contents, encoding='utf-8')
-    app.builder.build_all()
-    result = (app.outdir / 'contents.txt').text(encoding='utf-8')
-
+def test_nonascii_maxwidth(app, status, warning):
+    app.builder.build_update()
+    result = (app.outdir / 'nonascii_maxwidth.txt').text(encoding='utf-8')
     lines = [line.strip() for line in result.splitlines() if line.strip()]
     line_widths = [column_width(line) for line in lines]
     assert max(line_widths) < MAXWIDTH
 
 
 @with_text_app()
-def test_table_with_empty_cell(app):
-    contents = (u"""
-        +-----+-----+
-        | XXX | XXX |
-        +-----+-----+
-        |     | XXX |
-        +-----+-----+
-        | XXX |     |
-        +-----+-----+
-    """)
-
-    (app.srcdir / 'contents.rst').write_text(contents, encoding='utf-8')
-    app.builder.build_all()
-    result = (app.outdir / 'contents.txt').text(encoding='utf-8')
-
+def test_table_with_empty_cell(app, status, warning):
+    app.builder.build_update()
+    result = (app.outdir / 'table.txt').text(encoding='utf-8')
     lines = [line.strip() for line in result.splitlines() if line.strip()]
     assert lines[0] == "+-------+-------+"
     assert lines[1] == "| XXX   | XXX   |"